forked from lix-project/lix
libcmd: don't enter debugger immediately on nix repl --debugger
checking whether a repl hook is set does not tell whether it's running,
which in turn means we will enter a debug repl even when not debugging.
this is not very useful when we have no debug frames to inspect at all,
as commonly happens when starting a new repl with --debugger specified.
Change-Id: I7065dc4ec29743bdd53ed99c29d6592e2ceea89c
This commit is contained in:
parent
9554a1ae29
commit
89a0ddc108
|
|
@ -285,7 +285,7 @@ ReplExitStatus NixRepl::mainLoop()
|
|||
{
|
||||
if (isFirstRepl) {
|
||||
std::string_view debuggerNotice = "";
|
||||
if (state.debug.repl) {
|
||||
if (state.debug.inDebugger) {
|
||||
debuggerNotice = " debugger";
|
||||
}
|
||||
notice("Lix %1%%2%\nType :? for help.", nixVersion, debuggerNotice);
|
||||
|
|
@ -366,7 +366,7 @@ StringSet NixRepl::completePrefix(const std::string & prefix)
|
|||
}
|
||||
}
|
||||
|
||||
if (state.debug.repl) {
|
||||
if (state.debug.inDebugger) {
|
||||
for (auto const & colonCmd : this->DEBUG_COMMANDS) {
|
||||
if (colonCmd.starts_with(prefix)) {
|
||||
completions.insert(std::string(colonCmd));
|
||||
|
|
@ -541,7 +541,7 @@ ProcessLineResult NixRepl::processLine(std::string line)
|
|||
<< " errors\n"
|
||||
<< " :?, :help Brings up this help menu\n"
|
||||
;
|
||||
if (state.debug.repl) {
|
||||
if (state.debug.inDebugger) {
|
||||
std::cout
|
||||
<< "\n"
|
||||
<< " Debug mode commands\n"
|
||||
|
|
@ -556,14 +556,14 @@ ProcessLineResult NixRepl::processLine(std::string line)
|
|||
|
||||
}
|
||||
|
||||
else if (state.debug.repl && (command == ":bt" || command == ":backtrace")) {
|
||||
else if (state.debug.inDebugger && (command == ":bt" || command == ":backtrace")) {
|
||||
for (const auto & [idx, i] : enumerate(state.debug.traces)) {
|
||||
std::cout << "\n" << ANSI_BLUE << idx << ANSI_NORMAL << ": ";
|
||||
showDebugTrace(std::cout, state.positions, i);
|
||||
}
|
||||
}
|
||||
|
||||
else if (state.debug.repl && (command == ":env")) {
|
||||
else if (state.debug.inDebugger && (command == ":env")) {
|
||||
for (const auto & [idx, i] : enumerate(state.debug.traces)) {
|
||||
if (idx == debugTraceIndex) {
|
||||
printEnvBindings(state, i.expr, i.env);
|
||||
|
|
@ -572,7 +572,7 @@ ProcessLineResult NixRepl::processLine(std::string line)
|
|||
}
|
||||
}
|
||||
|
||||
else if (state.debug.repl && (command == ":st")) {
|
||||
else if (state.debug.inDebugger && (command == ":st")) {
|
||||
try {
|
||||
// change the DebugTrace index.
|
||||
debugTraceIndex = stoi(arg);
|
||||
|
|
@ -590,13 +590,13 @@ ProcessLineResult NixRepl::processLine(std::string line)
|
|||
}
|
||||
}
|
||||
|
||||
else if (state.debug.repl && (command == ":s" || command == ":step")) {
|
||||
else if (state.debug.inDebugger && (command == ":s" || command == ":step")) {
|
||||
// set flag to stop at next DebugTrace; exit repl.
|
||||
state.debug.stop = true;
|
||||
return ProcessLineResult::Continue;
|
||||
}
|
||||
|
||||
else if (state.debug.repl && (command == ":c" || command == ":continue")) {
|
||||
else if (state.debug.inDebugger && (command == ":c" || command == ":continue")) {
|
||||
// set flag to run to next breakpoint or end of program; exit repl.
|
||||
state.debug.stop = false;
|
||||
return ProcessLineResult::Continue;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,73 @@
|
|||
@args --debugger
|
||||
|
||||
:c at the root repl is not allowed since no debugger is running yet
|
||||
nix-repl> :c
|
||||
error: unknown command ':c'
|
||||
|
||||
:c and other commands become available once a debugger starts
|
||||
nix-repl> with {}; a
|
||||
error: undefined variable 'a'
|
||||
at «string»:1:10:
|
||||
1| with {}; a
|
||||
| ^
|
||||
|
||||
nix-repl> :?
|
||||
The following commands are available:
|
||||
|
||||
<expr> Evaluate and print expression
|
||||
<x> = <expr> Bind expression to variable
|
||||
:a, :add <expr> Add attributes from resulting set to scope
|
||||
:b <expr> Build a derivation
|
||||
:bl <expr> Build a derivation, creating GC roots in the
|
||||
working directory
|
||||
:e, :edit <expr> Open package or function in $EDITOR
|
||||
:i <expr> Build derivation, then install result into
|
||||
current profile
|
||||
:l, :load <path> Load Nix expression and add it to scope
|
||||
:lf, :load-flake <ref> Load Nix flake and add it to scope
|
||||
:p, :print <expr> Evaluate and print expression recursively
|
||||
Strings are printed directly, without escaping.
|
||||
:q, :quit Exit nix-repl
|
||||
:r, :reload Reload all files
|
||||
:sh <expr> Build dependencies of derivation, then start
|
||||
nix-shell
|
||||
:t <expr> Describe result of evaluation
|
||||
:u <expr> Build derivation, then start nix-shell
|
||||
:doc <expr> Show documentation for the provided function (experimental lambda support)
|
||||
:log <expr | .drv path> Show logs for a derivation
|
||||
:te, :trace-enable [bool] Enable, disable or toggle showing traces for
|
||||
errors
|
||||
:?, :help Brings up this help menu
|
||||
|
||||
Debug mode commands
|
||||
:env Show env stack
|
||||
:bt, :backtrace Show trace stack
|
||||
:st Show current trace
|
||||
:st <idx> Change to another trace in the stack
|
||||
:c, :continue Go until end of program, exception, or builtins.break
|
||||
:s, :step Go one step
|
||||
|
||||
we can now inspect state
|
||||
nix-repl> :bt
|
||||
0: error: undefined variable 'a'
|
||||
«string»:1:10
|
||||
|
||||
1| with {}; a
|
||||
| ^
|
||||
|
||||
1: error: Fake frame for debugging purposes
|
||||
«string»:1:10
|
||||
|
||||
1| with {}; a
|
||||
| ^
|
||||
|
||||
and resume execution
|
||||
nix-repl> :c
|
||||
error: undefined variable 'a'
|
||||
at «string»:1:10:
|
||||
1| with {}; a
|
||||
| ^
|
||||
|
||||
the debugger is once again disabled
|
||||
nix-repl> :c
|
||||
error: unknown command ':c'
|
||||
|
|
@ -186,5 +186,6 @@ REPL_TEST(repl_printing);
|
|||
REPL_TEST(stack_vars);
|
||||
REPL_TEST(errors);
|
||||
REPL_TEST(idempotent);
|
||||
REPL_TEST(debug_frames);
|
||||
|
||||
}; // namespace nix
|
||||
|
|
|
|||
Loading…
Reference in a new issue