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sb/rbt/rep
| Author | SHA1 | Date | |
|---|---|---|---|
 Rebecca Turner
|
efb15e3dd5 | ||
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Rebecca Turner
|
f3b71e1e62 | ||
|
Rebecca Turner
|
b1bfc20e56 | ||
|
Rebecca Turner
|
f3f7d81988 | ||
|
Rebecca Turner
|
c41ec4e64c | ||
|
Rebecca Turner
|
a5a25894c1 |
35
doc/manual/rl-next/repl-overlays.md
Normal file
35
doc/manual/rl-next/repl-overlays.md
Normal file
|
|
@ -0,0 +1,35 @@
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---
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synopsis: Add `repl-overlays` option
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prs: 10203
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---
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A `repl-overlays` option has been added, which specifies files that can overlay
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and modify the top-level bindings in `nix repl`. For example, with the
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following contents in `~/.config/nix/repl.nix`:
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```nix
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info: final: prev: let
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optionalAttrs = predicate: attrs:
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if predicate
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then attrs
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else {};
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in
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optionalAttrs (prev ? legacyPackages && prev.legacyPackages ? ${info.currentSystem})
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{
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pkgs = prev.legacyPackages.${info.currentSystem};
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}
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```
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We can run `nix repl` and use `pkgs` to refer to `legacyPackages.${currentSystem}`:
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```ShellSession
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$ nix repl --repl-overlays ~/.config/nix/repl.nix nixpkgs
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Nix 2.21.0pre20240309_4111bb6
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Type :? for help.
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Loading installable 'flake:nixpkgs#'...
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Added 5 variables.
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Loading 'repl-overlays'...
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Added 6 variables.
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nix-repl> pkgs.bash
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«derivation /nix/store/g08b5vkwwh0j8ic9rkmd8mpj878rk62z-bash-5.2p26.drv»
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```
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|
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@ -13,3 +13,5 @@ libcmd_LDFLAGS = $(EDITLINE_LIBS) $(LOWDOWN_LIBS) -pthread
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libcmd_LIBS = libstore libutil libexpr libmain libfetchers
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$(eval $(call install-file-in, $(buildprefix)$(d)/nix-cmd.pc, $(libdir)/pkgconfig, 0644))
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$(d)/repl.cc: $(d)/repl-overlays.nix.gen.hh
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|
|
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8
src/libcmd/repl-overlays.nix
Normal file
8
src/libcmd/repl-overlays.nix
Normal file
|
|
@ -0,0 +1,8 @@
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info:
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initial:
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functions:
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let final = builtins.foldl'
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(prev: function: prev // (function info final prev))
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initial
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functions;
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in final
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|
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@ -30,6 +30,7 @@
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#include "signals.hh"
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#include "print.hh"
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#include "progress-bar.hh"
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#include "gc-small-vector.hh"
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|
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#if HAVE_BOEHMGC
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#define GC_INCLUDE_NEW
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|
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@ -100,6 +101,42 @@ struct NixRepl
|
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void evalString(std::string s, Value & v);
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void loadDebugTraceEnv(DebugTrace & dt);
|
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|
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/**
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* Load the `repl-overlays` and add the resulting AttrSet to the top-level
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* bindings.
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*/
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void loadReplOverlays();
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/**
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* Get a list of each of the `repl-overlays` (parsed and evaluated).
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*/
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Value * replOverlays();
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|
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/**
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* Get the Nix function that composes the `repl-overlays` together.
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*/
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Value * getReplOverlaysEvalFunction();
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|
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/**
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* Cached return value of `getReplOverlaysEvalFunction`.
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*/
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Value * replOverlaysEvalFunction;
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/**
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* Get the `info` AttrSet that's passed as the first argument to each
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* of the `repl-overlays`.
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*/
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Value * replInitInfo();
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|
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/**
|
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* Get the current top-level bindings as an AttrSet.
|
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*/
|
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Value * bindingsToAttrs();
|
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/**
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* Parse a file, evaluate its result, and force the resulting value.
|
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*/
|
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Value * evalFile(SourcePath & path);
|
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|
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void printValue(std::ostream & str,
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Value & v,
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unsigned int maxDepth = std::numeric_limits<unsigned int>::max())
|
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|
|
@ -737,14 +774,95 @@ void NixRepl::loadFiles()
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loadedFiles.clear();
|
||||
|
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for (auto & i : old) {
|
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notice("Loading '%1%'...", i);
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notice("Loading '%1%'...", Magenta(i));
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loadFile(i);
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}
|
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|
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for (auto & [i, what] : getValues()) {
|
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notice("Loading installable '%1%'...", what);
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notice("Loading installable '%1%'...", Magenta(what));
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addAttrsToScope(*i);
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}
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|
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loadReplOverlays();
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}
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|
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void NixRepl::loadReplOverlays()
|
||||
{
|
||||
if (!evalSettings.replOverlays) {
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return;
|
||||
}
|
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|
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notice("Loading '%1%'...", Magenta("repl-overlays"));
|
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auto replInitFilesFunction = getReplOverlaysEvalFunction();
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|
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Value &newAttrs(*state->allocValue());
|
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SmallValueVector<3> args = {replInitInfo(), bindingsToAttrs(), replOverlays()};
|
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state->callFunction(
|
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*replInitFilesFunction,
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args.size(),
|
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args.data(),
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newAttrs,
|
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replInitFilesFunction->determinePos(noPos)
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);
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|
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addAttrsToScope(newAttrs);
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}
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|
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Value * NixRepl::getReplOverlaysEvalFunction()
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{
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if (replOverlaysEvalFunction) {
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return replOverlaysEvalFunction;
|
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}
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|
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auto evalReplInitFilesPath = CanonPath::root + "repl-overlays.nix";
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replOverlaysEvalFunction = state->allocValue();
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auto code =
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#include "repl-overlays.nix.gen.hh"
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;
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auto expr = state->parseExprFromString(
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code,
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SourcePath(evalReplInitFilesPath),
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state->staticBaseEnv
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);
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|
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state->eval(expr, *replOverlaysEvalFunction);
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|
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return replOverlaysEvalFunction;
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}
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Value * NixRepl::replOverlays()
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{
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Value * replInits(state->allocValue());
|
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state->mkList(*replInits, evalSettings.replOverlays.get().size());
|
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Value ** replInitElems = replInits->listElems();
|
||||
|
||||
size_t i = 0;
|
||||
for (auto path : evalSettings.replOverlays.get()) {
|
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debug("Loading '%1%' path '%2%'...", "repl-overlays", path);
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SourcePath sourcePath((CanonPath(path)));
|
||||
replInitElems[i] = evalFile(sourcePath);
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||||
i++;
|
||||
}
|
||||
|
||||
|
||||
return replInits;
|
||||
}
|
||||
|
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Value * NixRepl::replInitInfo()
|
||||
{
|
||||
auto builder = state->buildBindings(2);
|
||||
|
||||
Value * currentSystem(state->allocValue());
|
||||
currentSystem->mkString(evalSettings.getCurrentSystem());
|
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builder.insert(state->symbols.create("currentSystem"), currentSystem);
|
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|
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Value * valueNull(state->allocValue());
|
||||
valueNull->mkNull();
|
||||
builder.insert(state->symbols.create("__pleaseUseDotDotDot"), valueNull);
|
||||
|
||||
Value * info(state->allocValue());
|
||||
info->mkAttrs(builder.finish());
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||||
return info;
|
||||
}
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||||
|
||||
|
||||
|
|
@ -777,6 +895,18 @@ void NixRepl::addVarToScope(const Symbol name, Value & v)
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|||
varNames.emplace(state->symbols[name]);
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||||
}
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||||
|
||||
Value * NixRepl::bindingsToAttrs()
|
||||
{
|
||||
auto builder = state->buildBindings(staticEnv->vars.size());
|
||||
for (auto & [symbol, displacement] : staticEnv->vars) {
|
||||
builder.insert(symbol, env->values[displacement]);
|
||||
}
|
||||
|
||||
Value * attrs(state->allocValue());
|
||||
attrs->mkAttrs(builder.finish());
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||||
return attrs;
|
||||
}
|
||||
|
||||
|
||||
Expr * NixRepl::parseString(std::string s)
|
||||
{
|
||||
|
|
@ -791,6 +921,15 @@ void NixRepl::evalString(std::string s, Value & v)
|
|||
state->forceValue(v, v.determinePos(noPos));
|
||||
}
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||||
|
||||
Value * NixRepl::evalFile(SourcePath & path)
|
||||
{
|
||||
auto expr = state->parseExprFromFile(path, staticEnv);
|
||||
Value * result(state->allocValue());
|
||||
expr->eval(*state, *env, *result);
|
||||
state->forceValue(*result, result->determinePos(noPos));
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return result;
|
||||
}
|
||||
|
||||
|
||||
std::unique_ptr<AbstractNixRepl> AbstractNixRepl::create(
|
||||
const SearchPath & searchPath, nix::ref<Store> store, ref<EvalState> state,
|
||||
|
|
|
|||
|
|
@ -124,6 +124,42 @@ struct EvalSettings : Config
|
|||
|
||||
This is useful for debugging warnings in third-party Nix code.
|
||||
)"};
|
||||
|
||||
PathsSetting replOverlays{this, Paths(), "repl-overlays",
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||||
R"(
|
||||
A list of files containing Nix expressions that can be used to add
|
||||
default bindings to [`nix
|
||||
repl`](@docroot@/command-ref/new-cli/nix3-repl.md) sessions.
|
||||
|
||||
Each file is called with three arguments:
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||||
1. An [attribute set](@docroot@/language/values.html#attribute-set)
|
||||
containing at least a
|
||||
[`currentSystem`](@docroot@/language/builtin-constants.md#builtins-currentSystem)
|
||||
attribute (this is identical to
|
||||
[`builtins.currentSystem`](@docroot@/language/builtin-constants.md#builtins-currentSystem),
|
||||
except that it's available in
|
||||
[`pure-eval`](@docroot@/command-ref/conf-file.html#conf-pure-eval)
|
||||
mode).
|
||||
2. The top-level bindings produced by the previous `repl-overlays`
|
||||
value (or the default top-level bindings).
|
||||
3. The final top-level bindings produced by calling all
|
||||
`repl-overlays`.
|
||||
|
||||
For example, the following file would alias `pkgs` to
|
||||
`legacyPackages.${info.currentSystem}` (if that attribute is defined):
|
||||
|
||||
```nix
|
||||
info: prev: final:
|
||||
if prev ? legacyPackages
|
||||
&& prev.legacyPackages ? ${info.currentSystem}
|
||||
then
|
||||
{
|
||||
pkgs = prev.legacyPackages.${info.currentSystem};
|
||||
}
|
||||
else
|
||||
{ }
|
||||
```
|
||||
)"};
|
||||
};
|
||||
|
||||
extern EvalSettings evalSettings;
|
||||
|
|
|
|||
|
|
@ -4,6 +4,7 @@
|
|||
#include "symbol-table.hh"
|
||||
#include "util.hh"
|
||||
#include "print.hh"
|
||||
#include "escape-string.hh"
|
||||
|
||||
#include <cstdlib>
|
||||
|
||||
|
|
@ -36,7 +37,7 @@ void ExprFloat::show(const SymbolTable & symbols, std::ostream & str) const
|
|||
|
||||
void ExprString::show(const SymbolTable & symbols, std::ostream & str) const
|
||||
{
|
||||
printLiteralString(str, s);
|
||||
escapeString(str, s);
|
||||
}
|
||||
|
||||
void ExprPath::show(const SymbolTable & symbols, std::ostream & str) const
|
||||
|
|
|
|||
|
|
@ -2,6 +2,7 @@
|
|||
#include "print.hh"
|
||||
#include "eval.hh"
|
||||
#include "signals.hh"
|
||||
#include "escape-string.hh"
|
||||
|
||||
namespace nix {
|
||||
|
||||
|
|
@ -27,7 +28,7 @@ void printAmbiguous(
|
|||
printLiteralBool(str, v.boolean);
|
||||
break;
|
||||
case nString:
|
||||
printLiteralString(str, v.string.s);
|
||||
escapeString(str, v.string.s);
|
||||
break;
|
||||
case nPath:
|
||||
str << v.path().to_string(); // !!! escaping?
|
||||
|
|
|
|||
|
|
@ -2,6 +2,7 @@
|
|||
#include <span>
|
||||
#include <unordered_set>
|
||||
|
||||
#include "escape-string.hh"
|
||||
#include "print.hh"
|
||||
#include "ansicolor.hh"
|
||||
#include "store-api.hh"
|
||||
|
|
@ -11,57 +12,6 @@
|
|||
|
||||
namespace nix {
|
||||
|
||||
void printElided(
|
||||
std::ostream & output,
|
||||
unsigned int value,
|
||||
const std::string_view single,
|
||||
const std::string_view plural,
|
||||
bool ansiColors)
|
||||
{
|
||||
if (ansiColors)
|
||||
output << ANSI_FAINT;
|
||||
output << "«";
|
||||
pluralize(output, value, single, plural);
|
||||
output << " elided»";
|
||||
if (ansiColors)
|
||||
output << ANSI_NORMAL;
|
||||
}
|
||||
|
||||
|
||||
std::ostream &
|
||||
printLiteralString(std::ostream & str, const std::string_view string, size_t maxLength, bool ansiColors)
|
||||
{
|
||||
size_t charsPrinted = 0;
|
||||
if (ansiColors)
|
||||
str << ANSI_MAGENTA;
|
||||
str << "\"";
|
||||
for (auto i = string.begin(); i != string.end(); ++i) {
|
||||
if (charsPrinted >= maxLength) {
|
||||
str << "\" ";
|
||||
printElided(str, string.length() - charsPrinted, "byte", "bytes", ansiColors);
|
||||
return str;
|
||||
}
|
||||
|
||||
if (*i == '\"' || *i == '\\') str << "\\" << *i;
|
||||
else if (*i == '\n') str << "\\n";
|
||||
else if (*i == '\r') str << "\\r";
|
||||
else if (*i == '\t') str << "\\t";
|
||||
else if (*i == '$' && *(i+1) == '{') str << "\\" << *i;
|
||||
else str << *i;
|
||||
charsPrinted++;
|
||||
}
|
||||
str << "\"";
|
||||
if (ansiColors)
|
||||
str << ANSI_NORMAL;
|
||||
return str;
|
||||
}
|
||||
|
||||
std::ostream &
|
||||
printLiteralString(std::ostream & str, const std::string_view string)
|
||||
{
|
||||
return printLiteralString(str, string, std::numeric_limits<size_t>::max(), false);
|
||||
}
|
||||
|
||||
std::ostream &
|
||||
printLiteralBool(std::ostream & str, bool boolean)
|
||||
{
|
||||
|
|
@ -93,7 +43,7 @@ printIdentifier(std::ostream & str, std::string_view s) {
|
|||
else {
|
||||
char c = s[0];
|
||||
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')) {
|
||||
printLiteralString(str, s);
|
||||
escapeString(str, s);
|
||||
return str;
|
||||
}
|
||||
for (auto c : s)
|
||||
|
|
@ -101,7 +51,7 @@ printIdentifier(std::ostream & str, std::string_view s) {
|
|||
(c >= 'A' && c <= 'Z') ||
|
||||
(c >= '0' && c <= '9') ||
|
||||
c == '_' || c == '\'' || c == '-')) {
|
||||
printLiteralString(str, s);
|
||||
escapeString(str, s);
|
||||
return str;
|
||||
}
|
||||
str << s;
|
||||
|
|
@ -129,7 +79,7 @@ printAttributeName(std::ostream & str, std::string_view name) {
|
|||
if (isVarName(name))
|
||||
str << name;
|
||||
else
|
||||
printLiteralString(str, name);
|
||||
escapeString(str, name);
|
||||
return str;
|
||||
}
|
||||
|
||||
|
|
@ -248,7 +198,15 @@ private:
|
|||
|
||||
void printString(Value & v)
|
||||
{
|
||||
printLiteralString(output, v.string.s, options.maxStringLength, options.ansiColors);
|
||||
escapeString(
|
||||
output,
|
||||
v.string.s,
|
||||
{
|
||||
.maxLength = options.maxStringLength,
|
||||
.ansiColors = options.ansiColors,
|
||||
// NB: Non-printing characters won't be escaped.
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
void printPath(Value & v)
|
||||
|
|
|
|||
|
|
@ -11,28 +11,13 @@
|
|||
|
||||
#include "fmt.hh"
|
||||
#include "print-options.hh"
|
||||
#include "print-elided.hh"
|
||||
|
||||
namespace nix {
|
||||
|
||||
class EvalState;
|
||||
struct Value;
|
||||
|
||||
/**
|
||||
* Print a string as a Nix string literal.
|
||||
*
|
||||
* Quotes and fairly minimal escaping are added.
|
||||
*
|
||||
* @param o The output stream to print to
|
||||
* @param s The logical string
|
||||
*/
|
||||
std::ostream & printLiteralString(std::ostream & o, std::string_view s);
|
||||
inline std::ostream & printLiteralString(std::ostream & o, const char * s) {
|
||||
return printLiteralString(o, std::string_view(s));
|
||||
}
|
||||
inline std::ostream & printLiteralString(std::ostream & o, const std::string & s) {
|
||||
return printLiteralString(o, std::string_view(s));
|
||||
}
|
||||
|
||||
/** Print `true` or `false`. */
|
||||
std::ostream & printLiteralBool(std::ostream & o, bool b);
|
||||
|
||||
|
|
|
|||
|
|
@ -437,6 +437,34 @@ void OptionalPathSetting::operator =(const std::optional<Path> & v)
|
|||
this->assign(v);
|
||||
}
|
||||
|
||||
PathsSetting::PathsSetting(Config * options,
|
||||
const Paths & def,
|
||||
const std::string & name,
|
||||
const std::string & description,
|
||||
const std::set<std::string> & aliases)
|
||||
: BaseSetting<Paths>(def, true, name, description, aliases)
|
||||
{
|
||||
options->addSetting(this);
|
||||
}
|
||||
|
||||
|
||||
Paths PathsSetting::parse(const std::string & str) const
|
||||
{
|
||||
auto strings = tokenizeString<Strings>(str);
|
||||
Paths parsed;
|
||||
|
||||
for (auto str : strings) {
|
||||
parsed.push_back(canonPath(str));
|
||||
}
|
||||
|
||||
return parsed;
|
||||
}
|
||||
|
||||
PathsSetting::operator bool() const noexcept
|
||||
{
|
||||
return !get().empty();
|
||||
}
|
||||
|
||||
bool GlobalConfig::set(const std::string & name, const std::string & value)
|
||||
{
|
||||
for (auto & config : *configRegistrations)
|
||||
|
|
|
|||
|
|
@ -375,6 +375,26 @@ public:
|
|||
void operator =(const std::optional<Path> & v);
|
||||
};
|
||||
|
||||
/**
|
||||
* Like `OptionalPathSetting`, but allows multiple paths.
|
||||
*/
|
||||
class PathsSetting : public BaseSetting<Paths>
|
||||
{
|
||||
public:
|
||||
|
||||
PathsSetting(Config * options,
|
||||
const Paths & def,
|
||||
const std::string & name,
|
||||
const std::string & description,
|
||||
const std::set<std::string> & aliases = {});
|
||||
|
||||
Paths parse(const std::string & str) const override;
|
||||
|
||||
void operator =(const Paths & v);
|
||||
|
||||
operator bool() const noexcept;
|
||||
};
|
||||
|
||||
struct GlobalConfig : public AbstractConfig
|
||||
{
|
||||
typedef std::vector<Config*> ConfigRegistrations;
|
||||
|
|
|
|||
61
src/libutil/escape-string.cc
Normal file
61
src/libutil/escape-string.cc
Normal file
|
|
@ -0,0 +1,61 @@
|
|||
#include <iomanip>
|
||||
#include <ostream>
|
||||
#include <sstream>
|
||||
|
||||
#include "ansicolor.hh"
|
||||
#include "escape-char.hh"
|
||||
#include "english.hh"
|
||||
#include "escape-string.hh"
|
||||
#include "print-elided.hh"
|
||||
|
||||
namespace nix {
|
||||
|
||||
std::ostream &
|
||||
escapeString(std::ostream & output, std::string_view string, EscapeStringOptions options)
|
||||
{
|
||||
size_t charsPrinted = 0;
|
||||
if (options.ansiColors) {
|
||||
output << ANSI_MAGENTA;
|
||||
}
|
||||
output << "\"";
|
||||
for (auto i = string.begin(); i != string.end(); ++i) {
|
||||
if (charsPrinted >= options.maxLength) {
|
||||
output << "\" ";
|
||||
printElided(
|
||||
output, string.length() - charsPrinted, "byte", "bytes", options.ansiColors
|
||||
);
|
||||
return output;
|
||||
}
|
||||
|
||||
if (*i == '\"' || *i == '\\') {
|
||||
output << "\\" << *i;
|
||||
} else if (*i == '\n') {
|
||||
output << "\\n";
|
||||
} else if (*i == '\r') {
|
||||
output << "\\r";
|
||||
} else if (*i == '\t') {
|
||||
output << "\\t";
|
||||
} else if (*i == '$' && *(i + 1) == '{') {
|
||||
output << "\\" << *i;
|
||||
} else if (options.escapeNonPrinting && !isprint(*i)) {
|
||||
output << MaybeHexEscapedChar{*i};
|
||||
} else {
|
||||
output << *i;
|
||||
}
|
||||
charsPrinted++;
|
||||
}
|
||||
output << "\"";
|
||||
if (options.ansiColors) {
|
||||
output << ANSI_NORMAL;
|
||||
}
|
||||
return output;
|
||||
}
|
||||
|
||||
std::string escapeString(std::string_view s, EscapeStringOptions options)
|
||||
{
|
||||
std::ostringstream output;
|
||||
escapeString(output, s, options);
|
||||
return output.str();
|
||||
}
|
||||
|
||||
}; // namespace nix
|
||||
78
src/libutil/escape-string.hh
Normal file
78
src/libutil/escape-string.hh
Normal file
|
|
@ -0,0 +1,78 @@
|
|||
#pragma once
|
||||
|
||||
#include <limits>
|
||||
#include <ostream>
|
||||
|
||||
namespace nix {
|
||||
|
||||
/**
|
||||
* Options for escaping strings in `escapeString`.
|
||||
*
|
||||
* With default optional parameters, the output string will round-trip through
|
||||
* the Nix evaluator (i.e. you can copy/paste this function's output into the
|
||||
* REPL and have it evaluate as the string that got passed in).
|
||||
*
|
||||
* With non-default optional parameters, the output string will be
|
||||
* human-readable.
|
||||
*/
|
||||
struct EscapeStringOptions
|
||||
{
|
||||
/**
|
||||
* If `maxLength` is decreased, some trailing portion of the string may be
|
||||
* omitted with a message like `«123 bytes elided»`.
|
||||
*/
|
||||
size_t maxLength = std::numeric_limits<size_t>::max();
|
||||
|
||||
/**
|
||||
* If `ansiColors` is set, the output will contain ANSI terminal escape
|
||||
* sequences.
|
||||
*/
|
||||
bool ansiColors = false;
|
||||
|
||||
/**
|
||||
* If `escapeNonPrinting` is set, non-printing ASCII characters (i.e. with
|
||||
* byte values less than 0x20) will be printed in `\xhh` format, like
|
||||
* `\x1d` (other than those that Nix supports, like `\n`, `\r`, `\t`).
|
||||
* Note that this format is not yet supported by the Lix parser/evaluator!
|
||||
*
|
||||
* See: https://git.lix.systems/lix-project/lix/issues/149
|
||||
*/
|
||||
bool escapeNonPrinting = false;
|
||||
};
|
||||
|
||||
/**
|
||||
* Escape a string for output.
|
||||
*
|
||||
* With default optional parameters, the output string will round-trip through
|
||||
* the Nix evaluator (i.e. you can copy/paste this function's output into the
|
||||
* REPL and have it evaluate as the string that got passed in).
|
||||
*
|
||||
* With non-default optional parameters, the output string will be
|
||||
* human-readable.
|
||||
*
|
||||
* See `EscapeStringOptions` for more details on customizing the output.
|
||||
*/
|
||||
std::ostream &
|
||||
escapeString(std::ostream & output, std::string_view s, EscapeStringOptions options = {});
|
||||
|
||||
inline std::ostream & escapeString(std::ostream & output, const char * s)
|
||||
{
|
||||
return escapeString(output, std::string_view(s));
|
||||
}
|
||||
|
||||
inline std::ostream & escapeString(std::ostream & output, const std::string & s)
|
||||
{
|
||||
return escapeString(output, std::string_view(s));
|
||||
}
|
||||
|
||||
/**
|
||||
* Escape a string for output, writing the escaped result to a new string.
|
||||
*/
|
||||
std::string escapeString(std::string_view s, EscapeStringOptions options = {});
|
||||
|
||||
inline std::string escapeString(const char * s, EscapeStringOptions options = {})
|
||||
{
|
||||
return escapeString(std::string_view(s), options);
|
||||
}
|
||||
|
||||
} // namespace nix
|
||||
|
|
@ -9,6 +9,7 @@ libutil_sources = files(
|
|||
'english.cc',
|
||||
'error.cc',
|
||||
'escape-char.cc',
|
||||
'escape-string.cc',
|
||||
'exit.cc',
|
||||
'experimental-features.cc',
|
||||
'filesystem.cc',
|
||||
|
|
@ -19,6 +20,7 @@ libutil_sources = files(
|
|||
'logging.cc',
|
||||
'namespaces.cc',
|
||||
'position.cc',
|
||||
'print-elided.cc',
|
||||
'references.cc',
|
||||
'serialise.cc',
|
||||
'shlex.cc',
|
||||
|
|
@ -52,6 +54,7 @@ libutil_headers = files(
|
|||
'english.hh',
|
||||
'error.hh',
|
||||
'escape-char.hh',
|
||||
'escape-string.hh',
|
||||
'exit.hh',
|
||||
'experimental-features.hh',
|
||||
'experimental-features-json.hh',
|
||||
|
|
@ -70,6 +73,7 @@ libutil_headers = files(
|
|||
'namespaces.hh',
|
||||
'pool.hh',
|
||||
'position.hh',
|
||||
'print-elided.hh',
|
||||
'ref.hh',
|
||||
'references.hh',
|
||||
'regex-combinators.hh',
|
||||
|
|
|
|||
23
src/libutil/print-elided.cc
Normal file
23
src/libutil/print-elided.cc
Normal file
|
|
@ -0,0 +1,23 @@
|
|||
#include "print-elided.hh"
|
||||
#include "ansicolor.hh"
|
||||
#include "english.hh"
|
||||
|
||||
namespace nix {
|
||||
|
||||
void printElided(
|
||||
std::ostream & output,
|
||||
unsigned int value,
|
||||
const std::string_view single,
|
||||
const std::string_view plural,
|
||||
bool ansiColors)
|
||||
{
|
||||
if (ansiColors)
|
||||
output << ANSI_FAINT;
|
||||
output << "«";
|
||||
pluralize(output, value, single, plural);
|
||||
output << " elided»";
|
||||
if (ansiColors)
|
||||
output << ANSI_NORMAL;
|
||||
}
|
||||
|
||||
}
|
||||
23
src/libutil/print-elided.hh
Normal file
23
src/libutil/print-elided.hh
Normal file
|
|
@ -0,0 +1,23 @@
|
|||
#pragma once
|
||||
|
||||
#include <ostream>
|
||||
|
||||
|
||||
namespace nix {
|
||||
|
||||
/**
|
||||
* Print an `«... elided»` placeholder.
|
||||
*
|
||||
* Arguments are forwarded to `pluralize`.
|
||||
*
|
||||
* If `ansiColors` is set, the output will be wrapped in `ANSI_FAINT`.
|
||||
*/
|
||||
void printElided(
|
||||
std::ostream & output,
|
||||
unsigned int value,
|
||||
const std::string_view single,
|
||||
const std::string_view plural,
|
||||
bool ansiColors
|
||||
);
|
||||
|
||||
}
|
||||
|
|
@ -1,17 +1,28 @@
|
|||
Commentary "meow meow meow"
|
||||
Command "command"
|
||||
Output "output output one"
|
||||
Output ""
|
||||
Output ""
|
||||
Output "output output two"
|
||||
Commentary "meow meow"
|
||||
Command "command two"
|
||||
Output "output output output"
|
||||
Commentary "commentary"
|
||||
Output "output output output"
|
||||
Output ""
|
||||
Commentary "the blank below should be chomped"
|
||||
Command "command three"
|
||||
Commentary ""
|
||||
Output "meow output"
|
||||
Output ""
|
||||
Commentary: "meow meow meow"
|
||||
Indent: " "
|
||||
Prompt: "nix-repl> "
|
||||
Command: "command"
|
||||
Indent: " "
|
||||
Output: "output output one"
|
||||
Output: ""
|
||||
Commentary: ""
|
||||
Indent: " "
|
||||
Output: "output output two"
|
||||
Commentary: "meow meow"
|
||||
Indent: " "
|
||||
Prompt: "nix-repl> "
|
||||
Command: "command two"
|
||||
Indent: " "
|
||||
Output: "output output output"
|
||||
Commentary: "commentary"
|
||||
Indent: " "
|
||||
Output: "output output output"
|
||||
Output: ""
|
||||
Commentary: "the blank below should be chomped"
|
||||
Indent: " "
|
||||
Prompt: "nix-repl> "
|
||||
Command: "command three"
|
||||
Commentary: ""
|
||||
Indent: " "
|
||||
Output: "meow output"
|
||||
Output: ""
|
||||
|
|
|
|||
|
|
@ -1,10 +1,9 @@
|
|||
Command "command"
|
||||
Output "output output one"
|
||||
Output ""
|
||||
Output ""
|
||||
Output "output output two"
|
||||
Command "command two"
|
||||
Output "output output output"
|
||||
Output "output output output"
|
||||
Command "command three"
|
||||
Output "meow output"
|
||||
Command: "command"
|
||||
Output: "output output one"
|
||||
Output: ""
|
||||
Output: "output output two"
|
||||
Command: "command two"
|
||||
Output: "output output output"
|
||||
Output: "output output output"
|
||||
Command: "command three"
|
||||
Output: "meow output"
|
||||
|
|
|
|||
|
|
@ -0,0 +1,11 @@
|
|||
command
|
||||
output output one
|
||||
|
||||
output output two
|
||||
command two
|
||||
output output output
|
||||
output output output
|
||||
|
||||
command three
|
||||
meow output
|
||||
|
||||
|
|
@ -1,6 +1,7 @@
|
|||
https://github.com/NixOS/nix/pull/9917 (Enter debugger more reliably in let expressions and function calls)
|
||||
|
||||
This test ensures that continues don't skip opportunities to enter the debugger.
|
||||
@args --debugger
|
||||
trace: before outer break
|
||||
info: breakpoint reached
|
||||
|
||||
|
|
@ -13,7 +14,7 @@ This test ensures that continues don't skip opportunities to enter the debugger.
|
|||
0: error: breakpoint reached
|
||||
«none»:0
|
||||
1: while calling a function
|
||||
TEST_DATA/regression_9917.nix:3:5
|
||||
$TEST_DATA/regression_9917.nix:3:5
|
||||
|
||||
2| a = builtins.trace "before inner break" (
|
||||
3| builtins.break { msg = "hello"; }
|
||||
|
|
@ -21,7 +22,7 @@ This test ensures that continues don't skip opportunities to enter the debugger.
|
|||
4| );
|
||||
|
||||
2: while calling a function
|
||||
TEST_DATA/regression_9917.nix:2:7
|
||||
$TEST_DATA/regression_9917.nix:2:7
|
||||
|
||||
1| let
|
||||
2| a = builtins.trace "before inner break" (
|
||||
|
|
|
|||
|
|
@ -1,3 +1,4 @@
|
|||
@args --debugger
|
||||
error:
|
||||
… while evaluating the error message passed to builtin.throw
|
||||
|
||||
|
|
@ -14,3 +15,18 @@ We expect to be able to see locals like r in the debugger:
|
|||
|
||||
Env level 1
|
||||
abort baseNameOf break builtins derivation derivationStrict dirOf false fetchGit fetchMercurial fetchTarball fetchTree fromTOML import isNull map null placeholder removeAttrs scopedImport throw toString true
|
||||
|
||||
nix-repl> :quit
|
||||
error:
|
||||
… while evaluating the file '$TEST_DATA/regression_9918.nix':
|
||||
|
||||
… while calling the 'throw' builtin
|
||||
at $TEST_DATA/regression_9918.nix:3:7:
|
||||
2| r = [];
|
||||
3| x = builtins.throw r;
|
||||
| ^
|
||||
4| in
|
||||
|
||||
… while evaluating the error message passed to builtin.throw
|
||||
|
||||
error: cannot coerce a list to a string: [ ]
|
||||
|
|
|
|||
|
|
@ -0,0 +1,3 @@
|
|||
{
|
||||
packages.x86_64-linux.default = "my package";
|
||||
}
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
Check basic `repl-overlays` functionality.
|
||||
@args --repl-overlays
|
||||
@args ${PWD}/../extra_data/repl-overlay-packages-is-pkgs.nix
|
||||
nix-repl> pkgs
|
||||
{ default = "my package"; }
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
{
|
||||
var = "a";
|
||||
}
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
Check that multiple `repl-overlays` can compose together
|
||||
@args --repl-overlays
|
||||
@args "${PWD}/../extra_data/repl-overlays-compose-1.nix ${PWD}/../extra_data/repl-overlays-compose-2.nix"
|
||||
nix-repl> var
|
||||
"abc"
|
||||
nix-repl> varUsingFinal
|
||||
"final value is: puppy"
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
`repl-overlays` that try to parse out the `info` argument without a `...` error.
|
||||
@args --repl-overlays
|
||||
@args ${PWD}/../extra_data/repl-overlay-no-dotdotdot.nix
|
||||
@should-start false
|
||||
error:
|
||||
… while calling the 'foldl'' builtin
|
||||
at «string»:5:13:
|
||||
4| functions:
|
||||
5| let final = builtins.foldl'
|
||||
| ^
|
||||
6| (prev: function: prev // (function info final prev))
|
||||
|
||||
… in the right operand of the update (//) operator
|
||||
at «string»:6:37:
|
||||
5| let final = builtins.foldl'
|
||||
6| (prev: function: prev // (function info final prev))
|
||||
| ^
|
||||
7| initial
|
||||
|
||||
(stack trace truncated; use '--show-trace' to show the full trace)
|
||||
|
||||
error: function 'anonymous lambda' called with unexpected argument '__pleaseUseDotDotDot'
|
||||
at /Users/wiggles/lix/tests/functional/repl_characterization/extra_data/repl-overlay-no-dotdotdot.nix:1:1:
|
||||
1| {currentSystem}: final: prev: {}
|
||||
| ^
|
||||
2|
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
`repl-overlays` that fail to evaluate should error.
|
||||
@args --repl-overlays
|
||||
@args ${PWD}/../extra_data/repl-overlay-fail.nix
|
||||
@should-start false
|
||||
error:
|
||||
… while calling the 'foldl'' builtin
|
||||
at «string»:5:13:
|
||||
4| functions:
|
||||
5| let final = builtins.foldl'
|
||||
| ^
|
||||
6| (prev: function: prev // (function info final prev))
|
||||
|
||||
… in the right operand of the update (//) operator
|
||||
at «string»:6:37:
|
||||
5| let final = builtins.foldl'
|
||||
6| (prev: function: prev // (function info final prev))
|
||||
| ^
|
||||
7| initial
|
||||
|
||||
(stack trace truncated; use '--show-trace' to show the full trace)
|
||||
|
||||
error: evaluation aborted with the following error message: 'uh oh!'
|
||||
|
|
@ -1,3 +1,4 @@
|
|||
@args --debugger
|
||||
trace: before outer break
|
||||
info: breakpoint reached
|
||||
|
||||
|
|
@ -24,7 +25,7 @@ If we :st past the frame in the backtrace with the meow in it, the meow should n
|
|||
nix-repl> :st 3
|
||||
|
||||
3: while calling a function
|
||||
TEST_DATA/stack_vars.nix:5:7
|
||||
$TEST_DATA/stack_vars.nix:5:7
|
||||
|
||||
4| );
|
||||
5| b = builtins.trace "before outer break" (
|
||||
|
|
@ -58,9 +59,8 @@ If we :st past the frame in the backtrace with the meow in it, the meow should n
|
|||
3
|
||||
|
||||
nix-repl> :st 3
|
||||
|
||||
3: while calling a function
|
||||
TEST_DATA/stack_vars.nix:2:7
|
||||
$TEST_DATA/stack_vars.nix:2:7
|
||||
|
||||
1| let
|
||||
2| a = builtins.trace "before inner break" (
|
||||
|
|
@ -72,3 +72,21 @@ If we :st past the frame in the backtrace with the meow in it, the meow should n
|
|||
|
||||
Env level 1
|
||||
abort baseNameOf break builtins derivation derivationStrict dirOf false fetchGit fetchMercurial fetchTarball fetchTree fromTOML import isNull map null placeholder removeAttrs scopedImport throw toString true
|
||||
|
||||
nix-repl> :quit
|
||||
error:
|
||||
… while calling the 'trace' builtin
|
||||
at $TEST_DATA/stack_vars.nix:2:7:
|
||||
1| let
|
||||
2| a = builtins.trace "before inner break" (
|
||||
| ^
|
||||
3| let meow' = 3; in builtins.break { msg = "hello"; }
|
||||
|
||||
… while calling the 'break' builtin
|
||||
at $TEST_DATA/stack_vars.nix:3:23:
|
||||
2| a = builtins.trace "before inner break" (
|
||||
3| let meow' = 3; in builtins.break { msg = "hello"; }
|
||||
| ^
|
||||
4| );
|
||||
|
||||
error: breakpoint reached
|
||||
|
|
|
|||
|
|
@ -0,0 +1 @@
|
|||
info: final: prev: builtins.abort "uh oh!"
|
||||
|
|
@ -0,0 +1 @@
|
|||
{currentSystem}: final: prev: {}
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
info: final: prev:
|
||||
{
|
||||
pkgs = final.packages.x86_64-linux;
|
||||
}
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
info: final: prev:
|
||||
{
|
||||
var = prev.var + "b";
|
||||
|
||||
# We can access the final value of `var` here even though it isn't defined yet:
|
||||
varUsingFinal = "final value is: " + final.newVar;
|
||||
}
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
info: final: prev:
|
||||
{
|
||||
var = prev.var + "c";
|
||||
|
||||
newVar = "puppy";
|
||||
}
|
||||
|
|
@ -1,25 +1,26 @@
|
|||
#include <gtest/gtest.h>
|
||||
|
||||
#include <boost/algorithm/string/replace.hpp>
|
||||
#include <optional>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
#include <optional>
|
||||
#include <unistd.h>
|
||||
#include <boost/algorithm/string/replace.hpp>
|
||||
|
||||
#include "escape-string.hh"
|
||||
#include "test-session.hh"
|
||||
#include "util.hh"
|
||||
#include "tests/characterization.hh"
|
||||
#include "tests/cli-literate-parser.hh"
|
||||
#include "tests/terminal-code-eater.hh"
|
||||
#include "util.hh"
|
||||
|
||||
using namespace std::string_literals;
|
||||
|
||||
namespace nix {
|
||||
|
||||
static constexpr const char * REPL_PROMPT = "nix-repl> ";
|
||||
static constexpr const std::string_view REPL_PROMPT = "nix-repl> ";
|
||||
|
||||
// ASCII ENQ character
|
||||
static constexpr const char * AUTOMATION_PROMPT = "\x05";
|
||||
static constexpr const std::string_view AUTOMATION_PROMPT = "\x05";
|
||||
|
||||
static std::string_view trimOutLog(std::string_view outLog)
|
||||
{
|
||||
|
|
@ -40,91 +41,147 @@ public:
|
|||
return unitTestData + "/" + testStem;
|
||||
}
|
||||
|
||||
void runReplTest(std::string_view const & content, std::vector<std::string> extraArgs = {}) const
|
||||
void runReplTest(const std::string content, std::vector<std::string> extraArgs = {}) const
|
||||
{
|
||||
auto syntax = CLILiterateParser::parse(REPL_PROMPT, content);
|
||||
auto parsed = cli_literate_parser::parse(
|
||||
content, cli_literate_parser::Config{.prompt = std::string(REPL_PROMPT), .indent = 2}
|
||||
);
|
||||
parsed.interpolatePwd(unitTestData);
|
||||
|
||||
// FIXME: why does this need two --quiets
|
||||
// show-trace is on by default due to test configuration, but is not a standard
|
||||
Strings args{"--quiet", "repl", "--quiet", "--option", "show-trace", "false", "--offline", "--extra-experimental-features", "repl-automation"};
|
||||
// show-trace is on by default due to test configuration, but is not a
|
||||
// standard
|
||||
Strings args{
|
||||
"--quiet",
|
||||
"repl",
|
||||
"--quiet",
|
||||
"--option",
|
||||
"show-trace",
|
||||
"false",
|
||||
"--offline",
|
||||
"--extra-experimental-features",
|
||||
"repl-automation",
|
||||
};
|
||||
args.insert(args.end(), extraArgs.begin(), extraArgs.end());
|
||||
args.insert(args.end(), parsed.args.begin(), parsed.args.end());
|
||||
|
||||
auto nixBin = canonPath(getEnvNonEmpty("NIX_BIN_DIR").value_or(NIX_BIN_DIR));
|
||||
|
||||
auto process = RunningProcess::start(nixBin + "/nix", args);
|
||||
auto session = TestSession{AUTOMATION_PROMPT, std::move(process)};
|
||||
auto session = TestSession(std::string(AUTOMATION_PROMPT), std::move(process));
|
||||
|
||||
for (auto & bit : syntax) {
|
||||
if (bit.kind != CLILiterateParser::NodeKind::COMMAND) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!session.waitForPrompt()) {
|
||||
ASSERT_TRUE(false);
|
||||
}
|
||||
session.runCommand(bit.text);
|
||||
for (auto & event : parsed.syntax) {
|
||||
std::visit(
|
||||
overloaded{
|
||||
[&](const cli_literate_parser::Command & e) {
|
||||
ASSERT_TRUE(session.waitForPrompt());
|
||||
if (e.text == ":quit") {
|
||||
// If we quit the repl explicitly, we won't have a
|
||||
// prompt when we're done.
|
||||
parsed.shouldStart = false;
|
||||
}
|
||||
session.runCommand(e.text);
|
||||
},
|
||||
[&](const auto & e) {},
|
||||
},
|
||||
event
|
||||
);
|
||||
}
|
||||
if (!session.waitForPrompt()) {
|
||||
ASSERT_TRUE(false);
|
||||
if (parsed.shouldStart) {
|
||||
ASSERT_TRUE(session.waitForPrompt());
|
||||
}
|
||||
session.close();
|
||||
|
||||
auto replacedOutLog = boost::algorithm::replace_all_copy(session.outLog, unitTestData, "TEST_DATA");
|
||||
auto replacedOutLog =
|
||||
boost::algorithm::replace_all_copy(session.outLog, unitTestData, "$TEST_DATA");
|
||||
auto cleanedOutLog = trimOutLog(replacedOutLog);
|
||||
|
||||
auto parsedOutLog = CLILiterateParser::parse(AUTOMATION_PROMPT, cleanedOutLog, 0);
|
||||
auto parsedOutLog = cli_literate_parser::parse(
|
||||
std::string(cleanedOutLog),
|
||||
cli_literate_parser::Config{.prompt = std::string(AUTOMATION_PROMPT), .indent = 0}
|
||||
);
|
||||
|
||||
parsedOutLog = CLILiterateParser::tidyOutputForComparison(std::move(parsedOutLog));
|
||||
syntax = CLILiterateParser::tidyOutputForComparison(std::move(syntax));
|
||||
auto expected = parsed.tidyOutputForComparison();
|
||||
auto actual = parsedOutLog.tidyOutputForComparison();
|
||||
|
||||
ASSERT_EQ(parsedOutLog, syntax);
|
||||
ASSERT_EQ(expected, actual);
|
||||
}
|
||||
|
||||
void runReplTestPath(const std::string_view & nameBase, std::vector<std::string> extraArgs)
|
||||
{
|
||||
auto nixPath = goldenMaster(nameBase + ".nix");
|
||||
if (pathExists(nixPath)) {
|
||||
extraArgs.push_back("-f");
|
||||
extraArgs.push_back(nixPath);
|
||||
}
|
||||
readTest(nameBase + ".test", [this, extraArgs](std::string input) {
|
||||
runReplTest(input, extraArgs);
|
||||
});
|
||||
}
|
||||
|
||||
void runReplTestPath(const std::string_view & nameBase)
|
||||
{
|
||||
runReplTestPath(nameBase, {});
|
||||
}
|
||||
|
||||
void runDebuggerTest(const std::string_view & nameBase)
|
||||
{
|
||||
runReplTestPath(nameBase, {"--debugger"});
|
||||
}
|
||||
};
|
||||
|
||||
TEST_F(ReplSessionTest, parses)
|
||||
TEST_F(ReplSessionTest, round_trip)
|
||||
{
|
||||
writeTest("basic.test", [this]() {
|
||||
const std::string content = readFile(goldenMaster("basic.test"));
|
||||
auto parsed = cli_literate_parser::parse(
|
||||
content, cli_literate_parser::Config{.prompt = std::string(REPL_PROMPT)}
|
||||
);
|
||||
|
||||
std::ostringstream out{};
|
||||
for (auto & node : parsed.syntax) {
|
||||
cli_literate_parser::unparseNode(out, node, true);
|
||||
}
|
||||
return out.str();
|
||||
});
|
||||
}
|
||||
|
||||
TEST_F(ReplSessionTest, tidy)
|
||||
{
|
||||
writeTest("basic.ast", [this]() {
|
||||
const std::string content = readFile(goldenMaster("basic.test"));
|
||||
auto parser = CLILiterateParser{REPL_PROMPT};
|
||||
parser.feed(content);
|
||||
|
||||
auto parsed = cli_literate_parser::parse(
|
||||
content, cli_literate_parser::Config{.prompt = std::string(REPL_PROMPT)}
|
||||
);
|
||||
std::ostringstream out{};
|
||||
for (auto & bit : parser.syntax()) {
|
||||
out << bit.print() << "\n";
|
||||
for (auto & node : parsed.syntax) {
|
||||
out << debugNode(node) << "\n";
|
||||
}
|
||||
return out.str();
|
||||
});
|
||||
|
||||
writeTest("basic_tidied.ast", [this]() {
|
||||
const std::string content = readFile(goldenMaster("basic.test"));
|
||||
auto syntax = CLILiterateParser::parse(REPL_PROMPT, content);
|
||||
|
||||
syntax = CLILiterateParser::tidyOutputForComparison(std::move(syntax));
|
||||
|
||||
auto parsed = cli_literate_parser::parse(
|
||||
content, cli_literate_parser::Config{.prompt = std::string(REPL_PROMPT)}
|
||||
);
|
||||
auto tidied = parsed.tidyOutputForComparison();
|
||||
std::ostringstream out{};
|
||||
for (auto & bit : syntax) {
|
||||
out << bit.print() << "\n";
|
||||
for (auto & node : tidied) {
|
||||
out << debugNode(node) << "\n";
|
||||
}
|
||||
return out.str();
|
||||
});
|
||||
}
|
||||
|
||||
TEST_F(ReplSessionTest, repl_basic)
|
||||
{
|
||||
readTest("basic_repl.test", [this](std::string input) { runReplTest(input); });
|
||||
}
|
||||
|
||||
#define DEBUGGER_TEST(name) \
|
||||
#define REPL_TEST(name) \
|
||||
TEST_F(ReplSessionTest, name) \
|
||||
{ \
|
||||
readTest(#name ".test", [this](std::string input) { \
|
||||
runReplTest(input, {"--debugger", "-f", goldenMaster(#name ".nix")}); \
|
||||
}); \
|
||||
{ \
|
||||
runReplTestPath(#name); \
|
||||
}
|
||||
|
||||
DEBUGGER_TEST(regression_9918);
|
||||
DEBUGGER_TEST(regression_9917);
|
||||
DEBUGGER_TEST(regression_l145);
|
||||
DEBUGGER_TEST(stack_vars);
|
||||
REPL_TEST(regression_9918);
|
||||
REPL_TEST(regression_9917);
|
||||
REPL_TEST(stack_vars);
|
||||
REPL_TEST(basic_repl);
|
||||
|
||||
};
|
||||
}; // namespace nix
|
||||
|
|
|
|||
|
|
@ -1,4 +1,5 @@
|
|||
#include <iostream>
|
||||
#include <span>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "test-session.hh"
|
||||
|
|
@ -21,14 +22,17 @@ RunningProcess RunningProcess::start(std::string executable, Strings args)
|
|||
|
||||
// This is separate from runProgram2 because we have different IO requirements
|
||||
pid_t pid = startProcess([&]() {
|
||||
if (dup2(procStdout.writeSide.get(), STDOUT_FILENO) == -1)
|
||||
if (dup2(procStdout.writeSide.get(), STDOUT_FILENO) == -1) {
|
||||
throw SysError("dupping stdout");
|
||||
if (dup2(procStdin.readSide.get(), STDIN_FILENO) == -1)
|
||||
}
|
||||
if (dup2(procStdin.readSide.get(), STDIN_FILENO) == -1) {
|
||||
throw SysError("dupping stdin");
|
||||
}
|
||||
procStdin.writeSide.close();
|
||||
procStdout.readSide.close();
|
||||
if (dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
|
||||
if (dup2(STDOUT_FILENO, STDERR_FILENO) == -1) {
|
||||
throw SysError("dupping stderr");
|
||||
}
|
||||
execv(executable.c_str(), stringsToCharPtrs(args).data());
|
||||
throw SysError("exec did not happen");
|
||||
});
|
||||
|
|
@ -44,7 +48,8 @@ RunningProcess RunningProcess::start(std::string executable, Strings args)
|
|||
}
|
||||
|
||||
[[gnu::unused]]
|
||||
std::ostream & operator<<(std::ostream & os, ReplOutputParser::State s)
|
||||
std::ostream &
|
||||
operator<<(std::ostream & os, ReplOutputParser::State s)
|
||||
{
|
||||
switch (s) {
|
||||
case ReplOutputParser::State::Prompt:
|
||||
|
|
@ -91,8 +96,7 @@ bool ReplOutputParser::feed(char c)
|
|||
return false;
|
||||
}
|
||||
|
||||
/** Waits for the prompt and then returns if a prompt was found */
|
||||
bool TestSession::waitForPrompt()
|
||||
bool TestSession::readOutThen(ReadOutThenCallback cb)
|
||||
{
|
||||
std::vector<char> buf(1024);
|
||||
|
||||
|
|
@ -106,38 +110,67 @@ bool TestSession::waitForPrompt()
|
|||
return false;
|
||||
}
|
||||
|
||||
switch (cb(std::span(buf.data(), res))) {
|
||||
case ReadOutThenCallbackResult::Stop:
|
||||
return true;
|
||||
case ReadOutThenCallbackResult::Continue:
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool TestSession::waitForPrompt()
|
||||
{
|
||||
bool notEof = readOutThen([&](std::span<char> s) -> ReadOutThenCallbackResult {
|
||||
bool foundPrompt = false;
|
||||
for (ssize_t i = 0; i < res; ++i) {
|
||||
|
||||
for (auto ch : s) {
|
||||
// foundPrompt = foundPrompt || outputParser.feed(buf[i]);
|
||||
bool wasEaten = true;
|
||||
eater.feed(buf[i], [&](char c) {
|
||||
eater.feed(ch, [&](char c) {
|
||||
wasEaten = false;
|
||||
foundPrompt = outputParser.feed(buf[i]) || foundPrompt;
|
||||
foundPrompt = outputParser.feed(ch) || foundPrompt;
|
||||
|
||||
outLog.push_back(c);
|
||||
});
|
||||
|
||||
if constexpr (DEBUG_REPL_PARSER) {
|
||||
std::cerr << "raw " << MaybeHexEscapedChar{buf[i]} << (wasEaten ? " [eaten]" : "") << "\n";
|
||||
std::cerr << "raw " << MaybeHexEscapedChar{ch} << (wasEaten ? " [eaten]" : "") << "\n";
|
||||
}
|
||||
}
|
||||
|
||||
if (foundPrompt) {
|
||||
return true;
|
||||
return foundPrompt ? ReadOutThenCallbackResult::Stop : ReadOutThenCallbackResult::Continue;
|
||||
});
|
||||
|
||||
return notEof;
|
||||
}
|
||||
|
||||
void TestSession::wait()
|
||||
{
|
||||
readOutThen([&](std::span<char> s) {
|
||||
for (auto ch : s) {
|
||||
eater.feed(ch, [&](char c) {
|
||||
outputParser.feed(c);
|
||||
outLog.push_back(c);
|
||||
});
|
||||
}
|
||||
}
|
||||
// just keep reading till we hit eof
|
||||
return ReadOutThenCallbackResult::Continue;
|
||||
});
|
||||
}
|
||||
|
||||
void TestSession::close()
|
||||
{
|
||||
proc.procStdin.close();
|
||||
wait();
|
||||
proc.procStdout.close();
|
||||
}
|
||||
|
||||
void TestSession::runCommand(std::string command)
|
||||
{
|
||||
if constexpr (DEBUG_REPL_PARSER)
|
||||
if constexpr (DEBUG_REPL_PARSER) {
|
||||
std::cerr << "runCommand " << command << "\n";
|
||||
}
|
||||
command += "\n";
|
||||
// We have to feed a newline into the output parser, since Nix might not
|
||||
// give us a newline before a prompt in all cases (it might clear line
|
||||
|
|
|
|||
|
|
@ -1,7 +1,9 @@
|
|||
#pragma once
|
||||
///@file
|
||||
|
||||
#include <functional>
|
||||
#include <sched.h>
|
||||
#include <span>
|
||||
#include <string>
|
||||
|
||||
#include "util.hh"
|
||||
|
|
@ -22,8 +24,7 @@ struct RunningProcess
|
|||
class ReplOutputParser
|
||||
{
|
||||
public:
|
||||
ReplOutputParser(std::string prompt)
|
||||
: prompt(prompt)
|
||||
ReplOutputParser(std::string prompt) : prompt(prompt)
|
||||
{
|
||||
assert(!prompt.empty());
|
||||
}
|
||||
|
|
@ -60,10 +61,27 @@ struct TestSession
|
|||
{
|
||||
}
|
||||
|
||||
/** Waits for the prompt and then returns if a prompt was found */
|
||||
bool waitForPrompt();
|
||||
|
||||
/** Feeds a line of input into the command */
|
||||
void runCommand(std::string command);
|
||||
|
||||
/** Closes the session, closing standard input and waiting for standard
|
||||
* output to close, capturing any remaining output. */
|
||||
void close();
|
||||
|
||||
private:
|
||||
/** Waits until the command closes its output */
|
||||
void wait();
|
||||
|
||||
enum class ReadOutThenCallbackResult { Stop, Continue };
|
||||
using ReadOutThenCallback = std::function<ReadOutThenCallbackResult(std::span<char>)>;
|
||||
/** Reads some chunks of output, calling the callback provided for each
|
||||
* chunk and stopping if it returns Stop.
|
||||
*
|
||||
* @returns false if EOF, true if the callback requested we stop first.
|
||||
* */
|
||||
bool readOutThen(ReadOutThenCallback cb);
|
||||
};
|
||||
};
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@ libutil-test-support_INSTALL_DIR :=
|
|||
|
||||
libutil-test-support_SOURCES := $(wildcard $(d)/tests/*.cc)
|
||||
|
||||
libutil-test-support_CXXFLAGS += $(libutil-tests_EXTRA_INCLUDES)
|
||||
libutil-test-support_CXXFLAGS += $(libutil-tests_EXTRA_INCLUDES) -I src/libutil
|
||||
|
||||
# libexpr so we can steal their string printer from print.cc
|
||||
libutil-test-support_LIBS = libutil libexpr
|
||||
|
|
|
|||
|
|
@ -74,20 +74,20 @@ public:
|
|||
{
|
||||
auto file = goldenMaster(testStem);
|
||||
|
||||
auto got = test();
|
||||
auto actual = test();
|
||||
|
||||
if (testAccept())
|
||||
{
|
||||
createDirs(dirOf(file));
|
||||
writeFile2(file, got);
|
||||
writeFile2(file, actual);
|
||||
GTEST_SKIP()
|
||||
<< "Updating golden master "
|
||||
<< file;
|
||||
}
|
||||
else
|
||||
{
|
||||
decltype(got) expected = readFile2(file);
|
||||
ASSERT_EQ(got, expected);
|
||||
decltype(actual) expected = readFile2(file);
|
||||
ASSERT_EQ(expected, actual);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,247 +1,444 @@
|
|||
#include "cli-literate-parser.hh"
|
||||
#include "libexpr/print.hh"
|
||||
#include "escape-string.hh"
|
||||
#include "escape-char.hh"
|
||||
#include "libexpr/print.hh"
|
||||
#include "types.hh"
|
||||
#include "util.hh"
|
||||
#include <ranges>
|
||||
#include <boost/algorithm/string/replace.hpp>
|
||||
#include <boost/algorithm/string/trim.hpp>
|
||||
#include <iostream>
|
||||
#include <memory>
|
||||
#include <boost/algorithm/string/trim.hpp>
|
||||
#include <sstream>
|
||||
#include <variant>
|
||||
|
||||
using namespace std::string_literals;
|
||||
|
||||
namespace nix {
|
||||
#include "cli-literate-parser.hh"
|
||||
#include "escape-string.hh"
|
||||
#include "fmt.hh"
|
||||
#include "libexpr/print.hh"
|
||||
#include "shlex.hh"
|
||||
#include "types.hh"
|
||||
#include "util.hh"
|
||||
|
||||
static constexpr const bool DEBUG_PARSER = false;
|
||||
|
||||
constexpr auto CLILiterateParser::stateDebug(State const & s) -> const char *
|
||||
{
|
||||
return std::visit(
|
||||
overloaded{// clang-format off
|
||||
[](Indent const&) -> const char * { return "indent"; },
|
||||
[](Commentary const&) -> const char * { return "indent"; },
|
||||
[](Prompt const&) -> const char * { return "prompt"; },
|
||||
[](Command const&) -> const char * { return "command"; },
|
||||
[](OutputLine const&) -> const char * { return "output_line"; }},
|
||||
// clang-format on
|
||||
s);
|
||||
}
|
||||
using namespace std::string_literals;
|
||||
using namespace boost::algorithm;
|
||||
|
||||
auto CLILiterateParser::Node::print() const -> std::string
|
||||
{
|
||||
std::ostringstream s{};
|
||||
switch (kind) {
|
||||
case NodeKind::COMMENTARY:
|
||||
s << "Commentary ";
|
||||
break;
|
||||
case NodeKind::COMMAND:
|
||||
s << "Command ";
|
||||
break;
|
||||
case NodeKind::OUTPUT:
|
||||
s << "Output ";
|
||||
break;
|
||||
}
|
||||
printLiteralString(s, this->text);
|
||||
return s.str();
|
||||
}
|
||||
namespace nix {
|
||||
|
||||
void PrintTo(std::vector<CLILiterateParser::Node> const & nodes, std::ostream * os)
|
||||
{
|
||||
for (auto & node : nodes) {
|
||||
*os << node.print() << "\\n";
|
||||
}
|
||||
}
|
||||
namespace cli_literate_parser {
|
||||
|
||||
auto CLILiterateParser::parse(std::string prompt, std::string_view const & input, size_t indent) -> std::vector<Node>
|
||||
struct Parser
|
||||
{
|
||||
CLILiterateParser p{std::move(prompt), indent};
|
||||
p.feed(input);
|
||||
return std::move(p).intoSyntax();
|
||||
}
|
||||
|
||||
auto CLILiterateParser::intoSyntax() && -> std::vector<Node>
|
||||
{
|
||||
return std::move(this->syntax_);
|
||||
}
|
||||
|
||||
CLILiterateParser::CLILiterateParser(std::string prompt, size_t indent)
|
||||
: state_(indent == 0 ? State(Prompt{}) : State(Indent{}))
|
||||
, prompt_(prompt)
|
||||
, indent_(indent)
|
||||
, lastWasOutput_(false)
|
||||
, syntax_{}
|
||||
{
|
||||
assert(!prompt.empty());
|
||||
}
|
||||
|
||||
void CLILiterateParser::feed(char c)
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
std::cout << stateDebug(state_) << " " << MaybeHexEscapedChar{c} << "\n";
|
||||
Parser(const std::string input, Config config)
|
||||
: input(input)
|
||||
, rest(this->input)
|
||||
, prompt(config.prompt)
|
||||
, indentString(std::string(config.indent, ' '))
|
||||
, lastWasOutput(false)
|
||||
, syntax{}
|
||||
{
|
||||
assert(!prompt.empty());
|
||||
}
|
||||
|
||||
if (c == '\n') {
|
||||
onNewline();
|
||||
return;
|
||||
const std::string input;
|
||||
std::string_view rest;
|
||||
const std::string prompt;
|
||||
const std::string indentString;
|
||||
|
||||
/** Last line was output, so we consider a blank to be part of the output */
|
||||
bool lastWasOutput;
|
||||
|
||||
/**
|
||||
* Nodes of syntax being built.
|
||||
*/
|
||||
std::vector<Node> syntax;
|
||||
|
||||
auto dbg(std::string_view state) -> void
|
||||
{
|
||||
std::cout << state << ": ";
|
||||
escapeString(
|
||||
std::cout,
|
||||
rest,
|
||||
{
|
||||
.maxLength = 40,
|
||||
.ansiColors = true,
|
||||
.escapeNonPrinting = true,
|
||||
}
|
||||
);
|
||||
std::cout << std::endl;
|
||||
}
|
||||
|
||||
std::visit(
|
||||
overloaded{
|
||||
[&](Indent & s) {
|
||||
if (c == ' ') {
|
||||
if (++s.pos >= indent_) {
|
||||
transition(Prompt{});
|
||||
}
|
||||
} else {
|
||||
transition(Commentary{AccumulatingState{.lineAccumulator = std::string{c}}});
|
||||
}
|
||||
},
|
||||
[&](Prompt & s) {
|
||||
if (s.pos >= prompt_.length()) {
|
||||
transition(Command{AccumulatingState{.lineAccumulator = std::string{c}}});
|
||||
return;
|
||||
} else if (c == prompt_[s.pos]) {
|
||||
// good prompt character
|
||||
++s.pos;
|
||||
} else {
|
||||
// didn't match the prompt, so it must have actually been output.
|
||||
s.lineAccumulator.push_back(c);
|
||||
transition(OutputLine{AccumulatingState{.lineAccumulator = std::move(s.lineAccumulator)}});
|
||||
return;
|
||||
}
|
||||
s.lineAccumulator.push_back(c);
|
||||
},
|
||||
[&](AccumulatingState & s) { s.lineAccumulator.push_back(c); }},
|
||||
state_);
|
||||
}
|
||||
|
||||
void CLILiterateParser::onNewline()
|
||||
{
|
||||
State lastState = std::move(state_);
|
||||
bool newLastWasOutput = false;
|
||||
|
||||
syntax_.push_back(std::visit(
|
||||
overloaded{
|
||||
[&](Indent & s) {
|
||||
// XXX: technically this eats trailing spaces
|
||||
|
||||
// a newline following output is considered part of that output
|
||||
if (lastWasOutput_) {
|
||||
newLastWasOutput = true;
|
||||
return Node::mkOutput("");
|
||||
}
|
||||
return Node::mkCommentary("");
|
||||
},
|
||||
[&](Commentary & s) { return Node::mkCommentary(std::move(s.lineAccumulator)); },
|
||||
[&](Command & s) { return Node::mkCommand(std::move(s.lineAccumulator)); },
|
||||
[&](OutputLine & s) {
|
||||
newLastWasOutput = true;
|
||||
return Node::mkOutput(std::move(s.lineAccumulator));
|
||||
},
|
||||
[&](Prompt & s) {
|
||||
// INDENT followed by newline is also considered a blank output line
|
||||
return Node::mkOutput(std::move(s.lineAccumulator));
|
||||
}},
|
||||
lastState));
|
||||
|
||||
transition(Indent{});
|
||||
lastWasOutput_ = newLastWasOutput;
|
||||
}
|
||||
|
||||
void CLILiterateParser::feed(std::string_view s)
|
||||
{
|
||||
for (char ch : s) {
|
||||
feed(ch);
|
||||
}
|
||||
}
|
||||
|
||||
void CLILiterateParser::transition(State new_state)
|
||||
{
|
||||
// When we expect INDENT and we are parsing without indents, commentary
|
||||
// cannot exist, so we want to transition directly into PROMPT before
|
||||
// resuming normal processing.
|
||||
if (Indent * i = std::get_if<Indent>(&new_state); i != nullptr && indent_ == 0) {
|
||||
new_state = Prompt{AccumulatingState{}, i->pos};
|
||||
template<typename T>
|
||||
auto pushNode(T node) -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
std::cout << debugNode(node);
|
||||
}
|
||||
syntax.emplace_back(node);
|
||||
}
|
||||
|
||||
state_ = new_state;
|
||||
}
|
||||
|
||||
auto CLILiterateParser::syntax() const -> std::vector<Node> const &
|
||||
{
|
||||
return syntax_;
|
||||
}
|
||||
|
||||
auto CLILiterateParser::unparse(const std::string & prompt, const std::vector<Node> & syntax, size_t indent)
|
||||
-> std::string
|
||||
{
|
||||
std::string indent_str(indent, ' ');
|
||||
std::ostringstream out{};
|
||||
|
||||
for (auto & node : syntax) {
|
||||
switch (node.kind) {
|
||||
case NodeKind::COMMENTARY:
|
||||
out << node.text << "\n";
|
||||
break;
|
||||
case NodeKind::COMMAND:
|
||||
out << indent_str << prompt << node.text << "\n";
|
||||
break;
|
||||
case NodeKind::OUTPUT:
|
||||
out << indent_str << node.text << "\n";
|
||||
break;
|
||||
auto parseLiteral(const char c) -> bool
|
||||
{
|
||||
if (rest.starts_with(c)) {
|
||||
rest.remove_prefix(1);
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return out.str();
|
||||
}
|
||||
auto parseLiteral(const std::string_view & literal) -> bool
|
||||
{
|
||||
if (rest.starts_with(literal)) {
|
||||
rest.remove_prefix(literal.length());
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
auto CLILiterateParser::tidyOutputForComparison(std::vector<Node> && syntax) -> std::vector<Node>
|
||||
auto parseBool() -> bool
|
||||
{
|
||||
auto result = false;
|
||||
if (parseLiteral("true")) {
|
||||
result = true;
|
||||
} else if (parseLiteral("false")) {
|
||||
result = false;
|
||||
} else {
|
||||
throw ParseError("true or false", std::string(rest));
|
||||
}
|
||||
auto untilNewline = parseUntilNewline();
|
||||
if (!untilNewline.empty()) {
|
||||
throw ParseError("nothing after true or false", untilNewline);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
auto parseUntilNewline() -> std::string
|
||||
{
|
||||
auto pos = rest.find('\n');
|
||||
if (pos == std::string_view::npos) {
|
||||
throw ParseError("text and then newline", std::string(rest));
|
||||
} else {
|
||||
// `parseOutput()` sets this to true anyways.
|
||||
lastWasOutput = false;
|
||||
auto result = std::string(rest, 0, pos);
|
||||
rest.remove_prefix(pos + 1);
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
auto parseIndent() -> bool
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("indent");
|
||||
}
|
||||
if (indentString.empty()) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (parseLiteral(indentString)) {
|
||||
pushNode(Indent(indentString));
|
||||
return true;
|
||||
} else {
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("indent failed");
|
||||
}
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
auto parseCommand() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("command");
|
||||
}
|
||||
auto untilNewline = parseUntilNewline();
|
||||
pushNode(Command(untilNewline));
|
||||
}
|
||||
|
||||
auto parsePrompt() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("prompt");
|
||||
}
|
||||
if (parseLiteral(prompt)) {
|
||||
pushNode(Prompt(prompt));
|
||||
if (rest.empty()) {
|
||||
return;
|
||||
}
|
||||
parseCommand();
|
||||
} else {
|
||||
parseOutput();
|
||||
}
|
||||
}
|
||||
|
||||
auto parseOutput() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("output");
|
||||
}
|
||||
auto untilNewline = parseUntilNewline();
|
||||
pushNode(Output(untilNewline));
|
||||
lastWasOutput = true;
|
||||
}
|
||||
|
||||
auto parseAtSign() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("@ symbol");
|
||||
}
|
||||
if (!parseLiteral('@')) {
|
||||
parseOutputOrCommentary();
|
||||
}
|
||||
|
||||
if (parseLiteral("args ")) {
|
||||
parseArgs();
|
||||
} else if (parseLiteral("should-start ")) {
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("@should-start");
|
||||
}
|
||||
auto shouldStart = parseBool();
|
||||
pushNode(ShouldStart{shouldStart});
|
||||
}
|
||||
}
|
||||
|
||||
auto parseArgs() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("@args");
|
||||
}
|
||||
auto untilNewline = parseUntilNewline();
|
||||
pushNode(Args(untilNewline));
|
||||
}
|
||||
|
||||
auto parseOutputOrCommentary() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("output/commentary");
|
||||
}
|
||||
auto oldLastWasOutput = lastWasOutput;
|
||||
auto untilNewline = parseUntilNewline();
|
||||
|
||||
auto trimmed = trim_right_copy(untilNewline);
|
||||
|
||||
if (oldLastWasOutput && trimmed.empty()) {
|
||||
pushNode(Output{trimmed});
|
||||
} else {
|
||||
pushNode(Commentary{untilNewline});
|
||||
}
|
||||
}
|
||||
|
||||
auto parseStartOfLine() -> void
|
||||
{
|
||||
if constexpr (DEBUG_PARSER) {
|
||||
dbg("start of line");
|
||||
}
|
||||
if (parseIndent()) {
|
||||
parsePrompt();
|
||||
} else {
|
||||
parseAtSign();
|
||||
}
|
||||
}
|
||||
|
||||
auto parse() && -> ParseResult
|
||||
{
|
||||
// Begin the recursive descent parser at the start of a new line.
|
||||
while (!rest.empty()) {
|
||||
parseStartOfLine();
|
||||
}
|
||||
return std::move(*this).intoParseResult();
|
||||
}
|
||||
|
||||
auto intoParseResult() && -> ParseResult
|
||||
{
|
||||
// Do another pass over the nodes to produce auxiliary results like parsed
|
||||
// command line arguments.
|
||||
std::vector<std::string> args;
|
||||
std::vector<Node> newSyntax;
|
||||
auto shouldStart = true;
|
||||
|
||||
for (auto it = syntax.begin(); it != syntax.end(); ++it) {
|
||||
Node node = std::move(*it);
|
||||
std::visit(
|
||||
overloaded{
|
||||
[&](Args & e) {
|
||||
auto split = shell_split(std::string(e.text));
|
||||
args.insert(args.end(), split.begin(), split.end());
|
||||
},
|
||||
[&](ShouldStart & e) { shouldStart = e.shouldStart; },
|
||||
[&](auto & e) {},
|
||||
},
|
||||
node
|
||||
);
|
||||
|
||||
newSyntax.push_back(node);
|
||||
}
|
||||
|
||||
return ParseResult{
|
||||
.syntax = std::move(newSyntax),
|
||||
.args = std::move(args),
|
||||
.shouldStart = shouldStart,
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
template<typename View>
|
||||
auto tidySyntax(View syntax) -> std::vector<Node>
|
||||
{
|
||||
std::vector<Node> newSyntax{};
|
||||
// Note: Setting `lastWasCommand` lets us trim blank lines at the start and
|
||||
// end of the output stream.
|
||||
auto lastWasCommand = true;
|
||||
std::vector<Node> newSyntax;
|
||||
|
||||
// Eat trailing newlines, so assume that the very end was actually a command
|
||||
bool lastWasCommand = true;
|
||||
bool newLastWasCommand = true;
|
||||
|
||||
auto v = std::ranges::reverse_view(syntax);
|
||||
|
||||
for (auto it = v.begin(); it != v.end(); ++it) {
|
||||
Node item = std::move(*it);
|
||||
|
||||
lastWasCommand = newLastWasCommand;
|
||||
// chomp commentary
|
||||
if (item.kind == NodeKind::COMMENTARY) {
|
||||
for (auto it = syntax.begin(); it != syntax.end(); ++it) {
|
||||
Node node = *it;
|
||||
// Only compare `Command` and `Output` nodes.
|
||||
if (std::visit([&](auto && e) { return !e.shouldCompare(); }, node)) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (item.kind == NodeKind::COMMAND) {
|
||||
newLastWasCommand = true;
|
||||
// Remove blank lines before and after commands. This lets us keep nice
|
||||
// whitespace in the test files.
|
||||
auto shouldKeep = std::visit(
|
||||
overloaded{
|
||||
[&](Command & e) {
|
||||
lastWasCommand = true;
|
||||
auto trimmed = trim_right_copy(e.text);
|
||||
if (trimmed.empty()) {
|
||||
return false;
|
||||
} else {
|
||||
e.text = trimmed;
|
||||
return true;
|
||||
}
|
||||
},
|
||||
[&](Output & e) {
|
||||
std::string trimmed = trim_right_copy(e.text);
|
||||
if (lastWasCommand && trimmed.empty()) {
|
||||
// NB: Keep `lastWasCommand` true in this branch so we
|
||||
// can keep pruning empty output lines.
|
||||
return false;
|
||||
} else {
|
||||
e.text = trimmed;
|
||||
lastWasCommand = false;
|
||||
return true;
|
||||
}
|
||||
},
|
||||
[&](auto & e) {
|
||||
lastWasCommand = false;
|
||||
return false;
|
||||
},
|
||||
},
|
||||
node
|
||||
);
|
||||
|
||||
if (item.text == "") {
|
||||
// chomp empty commands
|
||||
continue;
|
||||
}
|
||||
if (shouldKeep) {
|
||||
newSyntax.push_back(node);
|
||||
}
|
||||
|
||||
if (item.kind == NodeKind::OUTPUT) {
|
||||
// TODO: horrible
|
||||
bool nextIsCommand = (it + 1 == v.end()) ? false : (it + 1)->kind == NodeKind::COMMAND;
|
||||
std::string trimmedText = boost::algorithm::trim_right_copy(item.text);
|
||||
if ((lastWasCommand || nextIsCommand) && trimmedText == "") {
|
||||
// chomp empty text above or directly below commands
|
||||
continue;
|
||||
}
|
||||
|
||||
// real output, stop chomping
|
||||
newLastWasCommand = false;
|
||||
|
||||
item = Node::mkOutput(std::move(trimmedText));
|
||||
}
|
||||
newSyntax.push_back(std::move(item));
|
||||
}
|
||||
|
||||
std::reverse(newSyntax.begin(), newSyntax.end());
|
||||
return newSyntax;
|
||||
}
|
||||
|
||||
};
|
||||
auto ParseResult::tidyOutputForComparison() -> std::vector<Node>
|
||||
{
|
||||
auto reversed = tidySyntax(std::ranges::reverse_view(syntax));
|
||||
auto unreversed = tidySyntax(std::ranges::reverse_view(reversed));
|
||||
return unreversed;
|
||||
}
|
||||
|
||||
void ParseResult::interpolatePwd(std::string_view pwd)
|
||||
{
|
||||
std::vector<std::string> newArgs;
|
||||
for (auto & arg : args) {
|
||||
newArgs.push_back(replaceStrings(arg, "${PWD}", pwd));
|
||||
}
|
||||
args = std::move(newArgs);
|
||||
}
|
||||
|
||||
const char * ParseError::what() const noexcept
|
||||
{
|
||||
if (what_) {
|
||||
return what_->c_str();
|
||||
} else {
|
||||
auto escaped = escapeString(rest, {.maxLength = 256, .escapeNonPrinting = true});
|
||||
auto hint =
|
||||
new HintFmt("Parse error: Expected %1%, got:\n%2%", expected, Uncolored(escaped));
|
||||
what_ = hint->str();
|
||||
return what_->c_str();
|
||||
}
|
||||
}
|
||||
|
||||
auto parse(const std::string input, Config config) -> ParseResult
|
||||
{
|
||||
return Parser(input, config).parse();
|
||||
}
|
||||
|
||||
std::ostream & operator<<(std::ostream & output, const Args & node)
|
||||
{
|
||||
return output << "@args " << node.text;
|
||||
}
|
||||
|
||||
std::ostream & operator<<(std::ostream & output, const ShouldStart & node)
|
||||
{
|
||||
return output << "@should-start " << (node.shouldStart ? "true" : "false");
|
||||
}
|
||||
|
||||
std::ostream & operator<<(std::ostream & output, const TextNode & rhs)
|
||||
{
|
||||
return output << rhs.text;
|
||||
}
|
||||
|
||||
void unparseNode(std::ostream & output, const Node & node, bool withNewline)
|
||||
{
|
||||
std::visit(
|
||||
[&](const auto & n) { output << n << (withNewline && n.emitNewlineAfter() ? "\n" : ""); },
|
||||
node
|
||||
);
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
std::string gtestFormat(T & value)
|
||||
{
|
||||
std::ostringstream formatted;
|
||||
unparseNode(formatted, value, true);
|
||||
auto str = formatted.str();
|
||||
// Needs to be the literal string `\n` and not a newline character to
|
||||
// trigger gtest diff printing. Yes seriously.
|
||||
boost::algorithm::replace_all(str, "\n", "\\n");
|
||||
return str;
|
||||
}
|
||||
|
||||
void PrintTo(const std::vector<Node> & nodes, std::ostream * output)
|
||||
{
|
||||
for (auto & node : nodes) {
|
||||
*output << gtestFormat(node);
|
||||
}
|
||||
}
|
||||
|
||||
std::string debugNode(const Node & node)
|
||||
{
|
||||
std::ostringstream output;
|
||||
output << std::visit([](const auto & n) { return n.kind(); }, node) << ": ";
|
||||
std::ostringstream contents;
|
||||
unparseNode(contents, node, false);
|
||||
escapeString(output, contents.str(), {.escapeNonPrinting = true});
|
||||
return output.str();
|
||||
}
|
||||
|
||||
auto ParseResult::debugPrint(std::ostream & output) -> void
|
||||
{
|
||||
::nix::cli_literate_parser::debugPrint(output, syntax);
|
||||
}
|
||||
|
||||
void debugPrint(std::ostream & output, std::vector<Node> & nodes)
|
||||
{
|
||||
for (auto & node : nodes) {
|
||||
output << debugNode(node) << std::endl;
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace cli_literate_parser
|
||||
} // namespace nix
|
||||
|
|
|
|||
|
|
@ -3,132 +3,195 @@
|
|||
|
||||
#include <compare>
|
||||
#include <memory>
|
||||
#include <optional>
|
||||
#include <sstream>
|
||||
#include <string>
|
||||
#include <variant>
|
||||
#include <vector>
|
||||
#include <string>
|
||||
|
||||
namespace nix {
|
||||
namespace cli_literate_parser {
|
||||
|
||||
// ------------------------- NODES -------------------------
|
||||
//
|
||||
// To update golden test files while preserving commentary output and other `@`
|
||||
// directives, we need to keep commentary output around after parsing.
|
||||
|
||||
struct BaseNode {
|
||||
virtual ~BaseNode() = default;
|
||||
|
||||
virtual auto shouldCompare() const -> bool { return false; }
|
||||
|
||||
virtual auto kind() const -> std::string = 0;
|
||||
virtual auto emitNewlineAfter() const -> bool = 0;
|
||||
|
||||
auto operator<=>(const BaseNode &rhs) const = default;
|
||||
};
|
||||
|
||||
/**
|
||||
* A node containing text. The text should be identical to how the node was
|
||||
* written in the input file.
|
||||
*/
|
||||
struct TextNode : BaseNode {
|
||||
std::string text;
|
||||
|
||||
explicit TextNode(std::string text) : text(text) {}
|
||||
};
|
||||
|
||||
std::ostream &operator<<(std::ostream &output, const TextNode &node);
|
||||
|
||||
#define DECLARE_TEXT_NODE(NAME, NEEDS_NEWLINE, SHOULD_COMPARE) \
|
||||
struct NAME : TextNode { \
|
||||
using TextNode::TextNode; \
|
||||
~NAME() override = default; \
|
||||
\
|
||||
auto kind() const -> std::string override { return #NAME; } \
|
||||
auto emitNewlineAfter() const -> bool override { return NEEDS_NEWLINE; } \
|
||||
auto shouldCompare() const -> bool override { return SHOULD_COMPARE; } \
|
||||
};
|
||||
|
||||
/* name, needsNewline, shouldCompare */
|
||||
DECLARE_TEXT_NODE(Prompt, false, false)
|
||||
DECLARE_TEXT_NODE(Command, true, true)
|
||||
DECLARE_TEXT_NODE(Output, true, true)
|
||||
DECLARE_TEXT_NODE(Commentary, true, false)
|
||||
DECLARE_TEXT_NODE(Args, true, false)
|
||||
DECLARE_TEXT_NODE(Indent, false, false)
|
||||
|
||||
#undef DECLARE_TEXT_NODE
|
||||
|
||||
struct ShouldStart : BaseNode {
|
||||
bool shouldStart;
|
||||
|
||||
ShouldStart(bool shouldStart) : shouldStart(shouldStart) {}
|
||||
~ShouldStart() override = default;
|
||||
auto emitNewlineAfter() const -> bool override { return true; }
|
||||
auto kind() const -> std::string override { return "should-start"; }
|
||||
|
||||
auto operator<=>(const ShouldStart &rhs) const = default;
|
||||
};
|
||||
std::ostream &operator<<(std::ostream &output, const ShouldStart &node);
|
||||
|
||||
/**
|
||||
* Any syntax node, including those that are cosmetic.
|
||||
*/
|
||||
using Node = std::variant<Prompt, Command, Output, Commentary, Args,
|
||||
ShouldStart, Indent>;
|
||||
|
||||
/** Unparses a node into the exact text that would have created it, including a
|
||||
* newline at the end if present, if withNewline is set */
|
||||
void unparseNode(std::ostream &output, const Node &node,
|
||||
bool withNewline = true);
|
||||
|
||||
std::string debugNode(const Node &node);
|
||||
void debugPrint(std::ostream &output, std::vector<Node> &nodes);
|
||||
|
||||
/**
|
||||
* Override gtest printing for lists of nodes.
|
||||
*/
|
||||
void PrintTo(std::vector<Node> const &nodes, std::ostream *output);
|
||||
|
||||
/**
|
||||
* The result of parsing a test file.
|
||||
*/
|
||||
struct ParseResult {
|
||||
/**
|
||||
* A set of nodes that can be used to reproduce the input file. This is used
|
||||
* to implement updating the test files.
|
||||
*/
|
||||
std::vector<Node> syntax;
|
||||
|
||||
/**
|
||||
* Extra CLI arguments.
|
||||
*/
|
||||
std::vector<std::string> args;
|
||||
|
||||
/**
|
||||
* Should the program start successfully?
|
||||
*/
|
||||
bool shouldStart = false;
|
||||
|
||||
/**
|
||||
* Replace `$PWD` with the given value in `args`.
|
||||
*/
|
||||
void interpolatePwd(std::string_view pwd);
|
||||
|
||||
/**
|
||||
* Tidy `syntax` to remove unnecessary nodes.
|
||||
*/
|
||||
auto tidyOutputForComparison() -> std::vector<Node>;
|
||||
|
||||
auto debugPrint(std::ostream &output) -> void;
|
||||
};
|
||||
|
||||
/**
|
||||
* A parse error.
|
||||
*/
|
||||
struct ParseError : std::exception {
|
||||
std::string expected;
|
||||
std::string rest;
|
||||
|
||||
ParseError(std::string expected, std::string rest)
|
||||
: expected(expected), rest(rest) {}
|
||||
|
||||
const char *what() const noexcept override;
|
||||
|
||||
private:
|
||||
/**
|
||||
* Cached formatted contents of `what()`.
|
||||
*/
|
||||
mutable std::optional<std::string> what_;
|
||||
};
|
||||
|
||||
struct Config {
|
||||
/**
|
||||
* The prompt string to look for.
|
||||
*/
|
||||
std::string prompt;
|
||||
/**
|
||||
* The number of spaces of indent for commands and output.
|
||||
*/
|
||||
size_t indent = 2;
|
||||
};
|
||||
|
||||
/*
|
||||
* A DFA parser for literate test cases for CLIs.
|
||||
* A recursive descent parser for literate test cases for CLIs.
|
||||
*
|
||||
* FIXME: implement merging of these, so you can auto update cases that have
|
||||
* comments.
|
||||
*
|
||||
* Format:
|
||||
* COMMENTARY
|
||||
* INDENT PROMPT COMMAND
|
||||
* INDENT OUTPUT
|
||||
* Syntax:
|
||||
* ```
|
||||
* ( COMMENTARY
|
||||
* | INDENT PROMPT COMMAND
|
||||
* | INDENT OUTPUT
|
||||
* | @args ARGS
|
||||
* | @should-start ( true | false )) *
|
||||
* ```
|
||||
*
|
||||
* e.g.
|
||||
* ```
|
||||
* commentary commentary commentary
|
||||
* @args --foo
|
||||
* @should-start false
|
||||
* nix-repl> :t 1
|
||||
* an integer
|
||||
* ```
|
||||
*
|
||||
* Yields:
|
||||
* Yields something like:
|
||||
* ```
|
||||
* Commentary "commentary commentary commentary"
|
||||
* Args "--foo"
|
||||
* ShouldStart false
|
||||
* Command ":t 1"
|
||||
* Output "an integer"
|
||||
* ```
|
||||
*
|
||||
* Note: one Output line is generated for each line of the sources, because
|
||||
* this is effectively necessary to be able to align them in the future to
|
||||
* auto-update tests.
|
||||
*/
|
||||
class CLILiterateParser
|
||||
{
|
||||
public:
|
||||
auto parse(std::string input, Config config) -> ParseResult;
|
||||
|
||||
enum class NodeKind {
|
||||
COMMENTARY,
|
||||
COMMAND,
|
||||
OUTPUT,
|
||||
};
|
||||
|
||||
struct Node
|
||||
{
|
||||
NodeKind kind;
|
||||
std::string text;
|
||||
std::strong_ordering operator<=>(Node const &) const = default;
|
||||
|
||||
static Node mkCommentary(std::string text)
|
||||
{
|
||||
return Node{.kind = NodeKind::COMMENTARY, .text = text};
|
||||
}
|
||||
|
||||
static Node mkCommand(std::string text)
|
||||
{
|
||||
return Node{.kind = NodeKind::COMMAND, .text = text};
|
||||
}
|
||||
|
||||
static Node mkOutput(std::string text)
|
||||
{
|
||||
return Node{.kind = NodeKind::OUTPUT, .text = text};
|
||||
}
|
||||
|
||||
auto print() const -> std::string;
|
||||
};
|
||||
|
||||
CLILiterateParser(std::string prompt, size_t indent = 2);
|
||||
|
||||
auto syntax() const -> std::vector<Node> const &;
|
||||
|
||||
/** Feeds a character into the parser */
|
||||
void feed(char c);
|
||||
|
||||
/** Feeds a string into the parser */
|
||||
void feed(std::string_view s);
|
||||
|
||||
/** Parses an input in a non-streaming fashion */
|
||||
static auto parse(std::string prompt, std::string_view const & input, size_t indent = 2) -> std::vector<Node>;
|
||||
|
||||
/** Returns, losslessly, the string that would have generated a syntax tree */
|
||||
static auto unparse(std::string const & prompt, std::vector<Node> const & syntax, size_t indent = 2) -> std::string;
|
||||
|
||||
/** Consumes a CLILiterateParser and gives you the syntax out of it */
|
||||
auto intoSyntax() && -> std::vector<Node>;
|
||||
|
||||
/** Tidies syntax to remove trailing whitespace from outputs and remove any
|
||||
* empty prompts */
|
||||
static auto tidyOutputForComparison(std::vector<Node> && syntax) -> std::vector<Node>;
|
||||
|
||||
private:
|
||||
|
||||
struct AccumulatingState
|
||||
{
|
||||
std::string lineAccumulator;
|
||||
};
|
||||
struct Indent
|
||||
{
|
||||
size_t pos = 0;
|
||||
};
|
||||
struct Commentary : public AccumulatingState
|
||||
{};
|
||||
struct Prompt : AccumulatingState
|
||||
{
|
||||
size_t pos = 0;
|
||||
};
|
||||
struct Command : public AccumulatingState
|
||||
{};
|
||||
struct OutputLine : public AccumulatingState
|
||||
{};
|
||||
|
||||
using State = std::variant<Indent, Commentary, Prompt, Command, OutputLine>;
|
||||
State state_;
|
||||
|
||||
constexpr static auto stateDebug(State const&) -> const char *;
|
||||
|
||||
const std::string prompt_;
|
||||
const size_t indent_;
|
||||
|
||||
/** Last line was output, so we consider a blank to be part of the output */
|
||||
bool lastWasOutput_;
|
||||
|
||||
std::vector<Node> syntax_;
|
||||
|
||||
void transition(State newState);
|
||||
void onNewline();
|
||||
};
|
||||
|
||||
// Override gtest printing for lists of nodes
|
||||
void PrintTo(std::vector<CLILiterateParser::Node> const & nodes, std::ostream * os);
|
||||
};
|
||||
}; // namespace cli_literate_parser
|
||||
}; // namespace nix
|
||||
|
|
|
|||
35
tests/unit/libutil/escape-string.cc
Normal file
35
tests/unit/libutil/escape-string.cc
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
#include "escape-string.hh"
|
||||
#include "ansicolor.hh"
|
||||
#include <gtest/gtest.h>
|
||||
|
||||
namespace nix {
|
||||
|
||||
TEST(EscapeString, simple) {
|
||||
auto escaped = escapeString("puppy");
|
||||
ASSERT_EQ(escaped, "\"puppy\"");
|
||||
}
|
||||
|
||||
TEST(EscapeString, escaping) {
|
||||
auto escaped = escapeString("\n\r\t \" \\ ${ooga booga}");
|
||||
ASSERT_EQ(escaped, "\"\\n\\r\\t \\\" \\\\ \\${ooga booga}\"");
|
||||
}
|
||||
|
||||
TEST(EscapeString, maxLength) {
|
||||
auto escaped = escapeString("puppy", {.maxLength = 5});
|
||||
ASSERT_EQ(escaped, "\"puppy\"");
|
||||
|
||||
escaped = escapeString("puppy doggy", {.maxLength = 5});
|
||||
ASSERT_EQ(escaped, "\"puppy\" «6 bytes elided»");
|
||||
}
|
||||
|
||||
TEST(EscapeString, ansiColors) {
|
||||
auto escaped = escapeString("puppy doggy", {.maxLength = 5, .ansiColors = true});
|
||||
ASSERT_EQ(escaped, ANSI_MAGENTA "\"puppy\" " ANSI_FAINT "«6 bytes elided»" ANSI_NORMAL);
|
||||
}
|
||||
|
||||
TEST(EscapeString, escapeNonPrinting) {
|
||||
auto escaped = escapeString("puppy\u0005doggy", {.escapeNonPrinting = true});
|
||||
ASSERT_EQ(escaped, "\"puppy\\x05doggy\"");
|
||||
}
|
||||
|
||||
} // namespace nix
|
||||
72
tests/unit/libutil/paths-setting.cc
Normal file
72
tests/unit/libutil/paths-setting.cc
Normal file
|
|
@ -0,0 +1,72 @@
|
|||
#include "config.hh"
|
||||
|
||||
#include <gtest/gtest.h>
|
||||
#include <gmock/gmock.h>
|
||||
#include <sstream>
|
||||
|
||||
using testing::Eq;
|
||||
|
||||
namespace nix {
|
||||
|
||||
class PathsSettingTestConfig : public Config
|
||||
{
|
||||
public:
|
||||
PathsSettingTestConfig()
|
||||
: Config()
|
||||
{ }
|
||||
|
||||
PathsSetting paths{this, Paths(), "paths", "documentation"};
|
||||
};
|
||||
|
||||
struct PathsSettingTest : public ::testing::Test {
|
||||
public:
|
||||
PathsSettingTestConfig mkConfig()
|
||||
{
|
||||
return PathsSettingTestConfig();
|
||||
}
|
||||
};
|
||||
|
||||
TEST_F(PathsSettingTest, parse) {
|
||||
auto config = mkConfig();
|
||||
// Not an absolute path:
|
||||
ASSERT_THROW(config.paths.parse("puppy.nix"), Error);
|
||||
|
||||
ASSERT_THAT(
|
||||
config.paths.parse("/puppy.nix"),
|
||||
Eq<Paths>({"/puppy.nix"})
|
||||
);
|
||||
|
||||
// Splits on whitespace:
|
||||
ASSERT_THAT(
|
||||
config.paths.parse("/puppy.nix /doggy.nix"),
|
||||
Eq<Paths>({"/puppy.nix", "/doggy.nix"})
|
||||
);
|
||||
|
||||
// Splits on _any_ whitespace:
|
||||
ASSERT_THAT(
|
||||
config.paths.parse("/puppy.nix \t /doggy.nix\n\n\n/borzoi.nix\r/goldie.nix"),
|
||||
Eq<Paths>({"/puppy.nix", "/doggy.nix", "/borzoi.nix", "/goldie.nix"})
|
||||
);
|
||||
|
||||
// Canonicizes paths:
|
||||
ASSERT_THAT(
|
||||
config.paths.parse("/puppy/../doggy.nix"),
|
||||
Eq<Paths>({"/doggy.nix"})
|
||||
);
|
||||
}
|
||||
|
||||
TEST_F(PathsSettingTest, bool) {
|
||||
auto config = mkConfig();
|
||||
// No paths:
|
||||
ASSERT_FALSE(config.paths);
|
||||
// Set a path:
|
||||
config.set("paths", "/puppy.nix");
|
||||
// Now there are paths:
|
||||
ASSERT_TRUE(config.paths);
|
||||
|
||||
// Multiple paths count too:
|
||||
config.set("paths", "/puppy.nix /doggy.nix");
|
||||
ASSERT_TRUE(config.paths);
|
||||
}
|
||||
|
||||
} // namespace nix
|
||||
|
|
@ -39,12 +39,14 @@ libutil_tests_sources = files(
|
|||
'libutil/closure.cc',
|
||||
'libutil/compression.cc',
|
||||
'libutil/config.cc',
|
||||
'libutil/escape-string.cc',
|
||||
'libutil/git.cc',
|
||||
'libutil/hash.cc',
|
||||
'libutil/hilite.cc',
|
||||
'libutil/json-utils.cc',
|
||||
'libutil/logging.cc',
|
||||
'libutil/lru-cache.cc',
|
||||
'libutil/paths-setting.cc',
|
||||
'libutil/pool.cc',
|
||||
'libutil/references.cc',
|
||||
'libutil/suggestions.cc',
|
||||
|
|
|
|||
Loading…
Reference in a new issue