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SourceExprCommand: swallow EvalError, add tests for this

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Completing things that would error would print an ugly error in
the middle of your command line. Avoid printing this error.
This commit is contained in:
Yorick van Pelt 2022-11-03 10:11:28 +01:00
parent 444af85552
commit 16f1720fd2
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GPG Key ID: A36E70F9DC014A15
2 changed files with 51 additions and 40 deletions
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85
src/libcmd/installables.cc
View File

@ -207,55 +207,60 @@ Strings SourceExprCommand::getDefaultFlakeAttrPathPrefixes()
void SourceExprCommand::completeInstallable(std::string_view prefix) void SourceExprCommand::completeInstallable(std::string_view prefix)
{ {
if (file) { try {
completionType = ctAttrs; if (file) {
completionType = ctAttrs;
evalSettings.pureEval = false; evalSettings.pureEval = false;
auto state = getEvalState(); auto state = getEvalState();
Expr *e = state->parseExprFromFile( Expr *e = state->parseExprFromFile(
resolveExprPath(state->checkSourcePath(lookupFileArg(*state, *file))) resolveExprPath(state->checkSourcePath(lookupFileArg(*state, *file)))
); );
Value root; Value root;
state->eval(e, root); state->eval(e, root);
auto autoArgs = getAutoArgs(*state); auto autoArgs = getAutoArgs(*state);
std::string prefix_ = std::string(prefix); std::string prefix_ = std::string(prefix);
auto sep = prefix_.rfind('.'); auto sep = prefix_.rfind('.');
std::string searchWord; std::string searchWord;
if (sep != std::string::npos) { if (sep != std::string::npos) {
searchWord = prefix_.substr(sep + 1, std::string::npos); searchWord = prefix_.substr(sep + 1, std::string::npos);
prefix_ = prefix_.substr(0, sep); prefix_ = prefix_.substr(0, sep);
} else { } else {
searchWord = prefix_; searchWord = prefix_;
prefix_ = ""; prefix_ = "";
} }
auto [v, pos] = findAlongAttrPath(*state, prefix_, *autoArgs, root); auto [v, pos] = findAlongAttrPath(*state, prefix_, *autoArgs, root);
Value &v1(*v); Value &v1(*v);
state->forceValue(v1, pos); state->forceValue(v1, pos);
Value v2; Value v2;
state->autoCallFunction(*autoArgs, v1, v2); state->autoCallFunction(*autoArgs, v1, v2);
if (v2.type() == nAttrs) { if (v2.type() == nAttrs) {
for (auto & i : *v2.attrs) { for (auto & i : *v2.attrs) {
std::string name = state->symbols[i.name]; std::string name = state->symbols[i.name];
if (name.find(searchWord) == 0) { if (name.find(searchWord) == 0) {
if (prefix_ == "") if (prefix_ == "")
completions->add(name); completions->add(name);
else else
completions->add(prefix_ + "." + name); completions->add(prefix_ + "." + name);
}
} }
} }
} else {
completeFlakeRefWithFragment(
getEvalState(),
lockFlags,
getDefaultFlakeAttrPathPrefixes(),
getDefaultFlakeAttrPaths(),
prefix);
} }
} else { } catch (EvalError& e) {
completeFlakeRefWithFragment( // swallow eval error
getEvalState(), (void)e;
lockFlags,
getDefaultFlakeAttrPathPrefixes(),
getDefaultFlakeAttrPaths(),
prefix);
} }
} }

6
tests/completions.sh
View File

@ -28,6 +28,10 @@ cat <<EOF > bar/flake.nix
}; };
} }
EOF EOF
mkdir -p err
cat <<EOF > err/flake.nix
throw "error"
EOF
# Test the completion of a subcommand # Test the completion of a subcommand
[[ "$(NIX_GET_COMPLETIONS=1 nix buil)" == $'normal\nbuild\t' ]] [[ "$(NIX_GET_COMPLETIONS=1 nix buil)" == $'normal\nbuild\t' ]]
@ -60,3 +64,5 @@ NIX_GET_COMPLETIONS=3 nix build --option allow-import-from | grep -- "allow-impo
# Attr path completions # Attr path completions
[[ "$(NIX_GET_COMPLETIONS=2 nix eval ./foo\#sam)" == $'attrs\n./foo#sampleOutput\t' ]] [[ "$(NIX_GET_COMPLETIONS=2 nix eval ./foo\#sam)" == $'attrs\n./foo#sampleOutput\t' ]]
[[ "$(NIX_GET_COMPLETIONS=4 nix eval --file ./foo/flake.nix outp)" == $'attrs\noutputs\t' ]] [[ "$(NIX_GET_COMPLETIONS=4 nix eval --file ./foo/flake.nix outp)" == $'attrs\noutputs\t' ]]
[[ "$(NIX_GET_COMPLETIONS=4 nix eval --file ./err/flake.nix outp 2>&1)" == $'attrs' ]]
[[ "$(NIX_GET_COMPLETIONS=2 nix eval ./err\# 2>&1)" == $'attrs' ]]