forked from lix-project/lix
slim down parser.y
most EvalState and Expr members defined here could be elsewhere, where
they'd be easier to maintain (not being embedded in a file with arcane
syntax) and *somewhat* more faithfully placed according to the path of
the file they're defined in.
(cherry picked from commit e1aa585964c3d864ebff0030584f3349a539d615)
Change-Id: Ibc704567462bb40f37cda05d8fadd465519db5f5
This commit is contained in:
parent
f9f8664879
commit
faaae9d045
|
|
@ -16,6 +16,7 @@
|
|||
#include "print.hh"
|
||||
#include "gc-small-vector.hh"
|
||||
#include "fetch-to-store.hh"
|
||||
#include "flake/flakeref.hh"
|
||||
|
||||
#include <algorithm>
|
||||
#include <chrono>
|
||||
|
|
@ -2658,6 +2659,153 @@ void EvalState::printStatistics()
|
|||
}
|
||||
|
||||
|
||||
SourcePath resolveExprPath(SourcePath path)
|
||||
{
|
||||
unsigned int followCount = 0, maxFollow = 1024;
|
||||
|
||||
/* If `path' is a symlink, follow it. This is so that relative
|
||||
path references work. */
|
||||
while (true) {
|
||||
// Basic cycle/depth limit to avoid infinite loops.
|
||||
if (++followCount >= maxFollow)
|
||||
throw Error("too many symbolic links encountered while traversing the path '%s'", path);
|
||||
if (path.lstat().type != InputAccessor::tSymlink) break;
|
||||
path = {CanonPath(path.readLink(), path.path.parent().value_or(CanonPath::root))};
|
||||
}
|
||||
|
||||
/* If `path' refers to a directory, append `/default.nix'. */
|
||||
if (path.lstat().type == InputAccessor::tDirectory)
|
||||
return path + "default.nix";
|
||||
|
||||
return path;
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromFile(const SourcePath & path)
|
||||
{
|
||||
return parseExprFromFile(path, staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromFile(const SourcePath & path, std::shared_ptr<StaticEnv> & staticEnv)
|
||||
{
|
||||
auto buffer = path.readFile();
|
||||
// readFile hopefully have left some extra space for terminators
|
||||
buffer.append("\0\0", 2);
|
||||
return parse(buffer.data(), buffer.size(), Pos::Origin(path), path.parent(), staticEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromString(std::string s_, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv)
|
||||
{
|
||||
auto s = make_ref<std::string>(std::move(s_));
|
||||
s->append("\0\0", 2);
|
||||
return parse(s->data(), s->size(), Pos::String{.source = s}, basePath, staticEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromString(std::string s, const SourcePath & basePath)
|
||||
{
|
||||
return parseExprFromString(std::move(s), basePath, staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseStdin()
|
||||
{
|
||||
//Activity act(*logger, lvlTalkative, "parsing standard input");
|
||||
auto buffer = drainFD(0);
|
||||
// drainFD should have left some extra space for terminators
|
||||
buffer.append("\0\0", 2);
|
||||
auto s = make_ref<std::string>(std::move(buffer));
|
||||
return parse(s->data(), s->size(), Pos::Stdin{.source = s}, rootPath(CanonPath::fromCwd()), staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
SourcePath EvalState::findFile(const std::string_view path)
|
||||
{
|
||||
return findFile(searchPath, path);
|
||||
}
|
||||
|
||||
|
||||
SourcePath EvalState::findFile(const SearchPath & searchPath, const std::string_view path, const PosIdx pos)
|
||||
{
|
||||
for (auto & i : searchPath.elements) {
|
||||
auto suffixOpt = i.prefix.suffixIfPotentialMatch(path);
|
||||
|
||||
if (!suffixOpt) continue;
|
||||
auto suffix = *suffixOpt;
|
||||
|
||||
auto rOpt = resolveSearchPathPath(i.path);
|
||||
if (!rOpt) continue;
|
||||
auto r = *rOpt;
|
||||
|
||||
Path res = suffix == "" ? r : concatStrings(r, "/", suffix);
|
||||
if (pathExists(res)) return CanonPath(canonPath(res));
|
||||
}
|
||||
|
||||
if (hasPrefix(path, "nix/"))
|
||||
return CanonPath(concatStrings(corepkgsPrefix, path.substr(4)));
|
||||
|
||||
debugThrow(ThrownError({
|
||||
.msg = hintfmt(evalSettings.pureEval
|
||||
? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"
|
||||
: "file '%s' was not found in the Nix search path (add it using $NIX_PATH or -I)",
|
||||
path),
|
||||
.errPos = positions[pos]
|
||||
}), 0, 0);
|
||||
}
|
||||
|
||||
|
||||
std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Path & value0)
|
||||
{
|
||||
auto & value = value0.s;
|
||||
auto i = searchPathResolved.find(value);
|
||||
if (i != searchPathResolved.end()) return i->second;
|
||||
|
||||
std::optional<std::string> res;
|
||||
|
||||
if (EvalSettings::isPseudoUrl(value)) {
|
||||
try {
|
||||
auto storePath = fetchers::downloadTarball(
|
||||
store, EvalSettings::resolvePseudoUrl(value), "source", false).tree.storePath;
|
||||
res = { store->toRealPath(storePath) };
|
||||
} catch (FileTransferError & e) {
|
||||
logWarning({
|
||||
.msg = hintfmt("Nix search path entry '%1%' cannot be downloaded, ignoring", value)
|
||||
});
|
||||
res = std::nullopt;
|
||||
}
|
||||
}
|
||||
|
||||
else if (hasPrefix(value, "flake:")) {
|
||||
experimentalFeatureSettings.require(Xp::Flakes);
|
||||
auto flakeRef = parseFlakeRef(value.substr(6), {}, true, false);
|
||||
debug("fetching flake search path element '%s''", value);
|
||||
auto storePath = flakeRef.resolve(store).fetchTree(store).first.storePath;
|
||||
res = { store->toRealPath(storePath) };
|
||||
}
|
||||
|
||||
else {
|
||||
auto path = absPath(value);
|
||||
if (pathExists(path))
|
||||
res = { path };
|
||||
else {
|
||||
logWarning({
|
||||
.msg = hintfmt("Nix search path entry '%1%' does not exist, ignoring", value)
|
||||
});
|
||||
res = std::nullopt;
|
||||
}
|
||||
}
|
||||
|
||||
if (res)
|
||||
debug("resolved search path element '%s' to '%s'", value, *res);
|
||||
else
|
||||
debug("failed to resolve search path element '%s'", value);
|
||||
|
||||
searchPathResolved[value] = res;
|
||||
return res;
|
||||
}
|
||||
|
||||
std::string ExternalValueBase::coerceToString(const Pos & pos, NixStringContext & context, bool copyMore, bool copyToStore) const
|
||||
{
|
||||
throw TypeError({
|
||||
|
|
|
|||
|
|
@ -388,22 +388,11 @@ formal
|
|||
|
||||
%%
|
||||
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "eval.hh"
|
||||
#include "filetransfer.hh"
|
||||
#include "fetchers.hh"
|
||||
#include "store-api.hh"
|
||||
#include "flake/flake.hh"
|
||||
|
||||
|
||||
namespace nix {
|
||||
|
||||
|
||||
Expr * EvalState::parse(
|
||||
char * text,
|
||||
size_t length,
|
||||
|
|
@ -431,152 +420,4 @@ Expr * EvalState::parse(
|
|||
}
|
||||
|
||||
|
||||
SourcePath resolveExprPath(SourcePath path)
|
||||
{
|
||||
unsigned int followCount = 0, maxFollow = 1024;
|
||||
|
||||
/* If `path' is a symlink, follow it. This is so that relative
|
||||
path references work. */
|
||||
while (true) {
|
||||
// Basic cycle/depth limit to avoid infinite loops.
|
||||
if (++followCount >= maxFollow)
|
||||
throw Error("too many symbolic links encountered while traversing the path '%s'", path);
|
||||
if (path.lstat().type != InputAccessor::tSymlink) break;
|
||||
path = {CanonPath(path.readLink(), path.path.parent().value_or(CanonPath::root))};
|
||||
}
|
||||
|
||||
/* If `path' refers to a directory, append `/default.nix'. */
|
||||
if (path.lstat().type == InputAccessor::tDirectory)
|
||||
return path + "default.nix";
|
||||
|
||||
return path;
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromFile(const SourcePath & path)
|
||||
{
|
||||
return parseExprFromFile(path, staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromFile(const SourcePath & path, std::shared_ptr<StaticEnv> & staticEnv)
|
||||
{
|
||||
auto buffer = path.readFile();
|
||||
// readFile hopefully have left some extra space for terminators
|
||||
buffer.append("\0\0", 2);
|
||||
return parse(buffer.data(), buffer.size(), Pos::Origin(path), path.parent(), staticEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromString(std::string s_, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv)
|
||||
{
|
||||
auto s = make_ref<std::string>(std::move(s_));
|
||||
s->append("\0\0", 2);
|
||||
return parse(s->data(), s->size(), Pos::String{.source = s}, basePath, staticEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseExprFromString(std::string s, const SourcePath & basePath)
|
||||
{
|
||||
return parseExprFromString(std::move(s), basePath, staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
Expr * EvalState::parseStdin()
|
||||
{
|
||||
//Activity act(*logger, lvlTalkative, "parsing standard input");
|
||||
auto buffer = drainFD(0);
|
||||
// drainFD should have left some extra space for terminators
|
||||
buffer.append("\0\0", 2);
|
||||
auto s = make_ref<std::string>(std::move(buffer));
|
||||
return parse(s->data(), s->size(), Pos::Stdin{.source = s}, rootPath(CanonPath::fromCwd()), staticBaseEnv);
|
||||
}
|
||||
|
||||
|
||||
SourcePath EvalState::findFile(const std::string_view path)
|
||||
{
|
||||
return findFile(searchPath, path);
|
||||
}
|
||||
|
||||
|
||||
SourcePath EvalState::findFile(const SearchPath & searchPath, const std::string_view path, const PosIdx pos)
|
||||
{
|
||||
for (auto & i : searchPath.elements) {
|
||||
auto suffixOpt = i.prefix.suffixIfPotentialMatch(path);
|
||||
|
||||
if (!suffixOpt) continue;
|
||||
auto suffix = *suffixOpt;
|
||||
|
||||
auto rOpt = resolveSearchPathPath(i.path);
|
||||
if (!rOpt) continue;
|
||||
auto r = *rOpt;
|
||||
|
||||
Path res = suffix == "" ? r : concatStrings(r, "/", suffix);
|
||||
if (pathExists(res)) return CanonPath(canonPath(res));
|
||||
}
|
||||
|
||||
if (hasPrefix(path, "nix/"))
|
||||
return CanonPath(concatStrings(corepkgsPrefix, path.substr(4)));
|
||||
|
||||
debugThrow(ThrownError({
|
||||
.msg = hintfmt(evalSettings.pureEval
|
||||
? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"
|
||||
: "file '%s' was not found in the Nix search path (add it using $NIX_PATH or -I)",
|
||||
path),
|
||||
.errPos = positions[pos]
|
||||
}), 0, 0);
|
||||
}
|
||||
|
||||
|
||||
std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Path & value0)
|
||||
{
|
||||
auto & value = value0.s;
|
||||
auto i = searchPathResolved.find(value);
|
||||
if (i != searchPathResolved.end()) return i->second;
|
||||
|
||||
std::optional<std::string> res;
|
||||
|
||||
if (EvalSettings::isPseudoUrl(value)) {
|
||||
try {
|
||||
auto storePath = fetchers::downloadTarball(
|
||||
store, EvalSettings::resolvePseudoUrl(value), "source", false).tree.storePath;
|
||||
res = { store->toRealPath(storePath) };
|
||||
} catch (FileTransferError & e) {
|
||||
logWarning({
|
||||
.msg = hintfmt("Nix search path entry '%1%' cannot be downloaded, ignoring", value)
|
||||
});
|
||||
res = std::nullopt;
|
||||
}
|
||||
}
|
||||
|
||||
else if (hasPrefix(value, "flake:")) {
|
||||
experimentalFeatureSettings.require(Xp::Flakes);
|
||||
auto flakeRef = parseFlakeRef(value.substr(6), {}, true, false);
|
||||
debug("fetching flake search path element '%s''", value);
|
||||
auto storePath = flakeRef.resolve(store).fetchTree(store).first.storePath;
|
||||
res = { store->toRealPath(storePath) };
|
||||
}
|
||||
|
||||
else {
|
||||
auto path = absPath(value);
|
||||
if (pathExists(path))
|
||||
res = { path };
|
||||
else {
|
||||
logWarning({
|
||||
.msg = hintfmt("Nix search path entry '%1%' does not exist, ignoring", value)
|
||||
});
|
||||
res = std::nullopt;
|
||||
}
|
||||
}
|
||||
|
||||
if (res)
|
||||
debug("resolved search path element '%s' to '%s'", value, *res);
|
||||
else
|
||||
debug("failed to resolve search path element '%s'", value);
|
||||
|
||||
searchPathResolved[value] = res;
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue