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src/libcmd/repl.cc: allow :log /path/to/store.drv

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This adds a second form to the `:log` command: it now can accept a
derivation path in addition to a derivation expression. As derivation
store paths start with `/nix/store`, this is not ambiguous.

Resolves: #51
Change-Id: Iebc7b011537e7012fae8faed4024ea1b8fdc81c3
This commit is contained in:
Max “Goldstein” Siling 2024-08-05 16:26:39 +03:00
parent 66469fc281
commit 9adfd9b8ad
Signed by: goldstein
GPG key ID: DE6031ABA0BB269A
3 changed files with 58 additions and 30 deletions
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9
doc/manual/rl-next/repl-log-drv.md Normal file
View file

@ -0,0 +1,9 @@
---
synopsis: "`:log` in repl now works on derivation paths"
issues: [fj#51]
cls: [1716]
category: Improvements
credits: [goldstein]
---
`:log` can now accept store derivation paths in addition to derivation expressions.

74
src/libcmd/repl.cc
View file

@ -536,7 +536,7 @@ ProcessLineResult NixRepl::processLine(std::string line)
<< " :t <expr> Describe result of evaluation\n"
<< " :u <expr> Build derivation, then start nix-shell\n"
<< " :doc <expr> Show documentation for the provided function (experimental lambda support)\n"
<< " :log <expr> Show logs for a derivation\n"
<< " :log <expr | .drv path> Show logs for a derivation\n"
<< " :te, :trace-enable [bool] Enable, disable or toggle showing traces for\n"
<< " errors\n"
<< " :?, :help Brings up this help menu\n"
@ -676,7 +676,49 @@ ProcessLineResult NixRepl::processLine(std::string line)
runNix("nix-shell", {state->store->printStorePath(drvPath)});
}
else if (command == ":b" || command == ":bl" || command == ":i" || command == ":sh" || command == ":log") {
else if (command == ":log") {
StorePath drvPath = ([&] {
auto maybeDrvPath = state->store->maybeParseStorePath(arg);
if (maybeDrvPath && maybeDrvPath->isDerivation()) {
return std::move(*maybeDrvPath);
} else {
Value v;
evalString(arg, v);
return getDerivationPath(v);
}
})();
Path drvPathRaw = state->store->printStorePath(drvPath);
settings.readOnlyMode = true;
Finally roModeReset([&]() {
settings.readOnlyMode = false;
});
auto subs = getDefaultSubstituters();
subs.push_front(state->store);
bool foundLog = false;
RunPager pager;
for (auto & sub : subs) {
auto * logSubP = dynamic_cast<LogStore *>(&*sub);
if (!logSubP) {
printInfo("Skipped '%s' which does not support retrieving build logs", sub->getUri());
continue;
}
auto & logSub = *logSubP;
auto log = logSub.getBuildLog(drvPath);
if (log) {
printInfo("got build log for '%s' from '%s'", drvPathRaw, logSub.getUri());
logger->writeToStdout(*log);
foundLog = true;
break;
}
}
if (!foundLog) throw Error("build log of '%s' is not available", drvPathRaw);
}
else if (command == ":b" || command == ":bl" || command == ":i" || command == ":sh") {
Value v;
evalString(arg, v);
StorePath drvPath = getDerivationPath(v);
@ -712,34 +754,6 @@ ProcessLineResult NixRepl::processLine(std::string line)
}
} else if (command == ":i") {
runNix("nix-env", {"-i", drvPathRaw});
} else if (command == ":log") {
settings.readOnlyMode = true;
Finally roModeReset([&]() {
settings.readOnlyMode = false;
});
auto subs = getDefaultSubstituters();
subs.push_front(state->store);
bool foundLog = false;
RunPager pager;
for (auto & sub : subs) {
auto * logSubP = dynamic_cast<LogStore *>(&*sub);
if (!logSubP) {
printInfo("Skipped '%s' which does not support retrieving build logs", sub->getUri());
continue;
}
auto & logSub = *logSubP;
auto log = logSub.getBuildLog(drvPath);
if (log) {
printInfo("got build log for '%s' from '%s'", drvPathRaw, logSub.getUri());
logger->writeToStdout(*log);
foundLog = true;
break;
}
}
if (!foundLog) throw Error("build log of '%s' is not available", drvPathRaw);
} else {
runNix("nix-shell", {drvPathRaw});
}

5
tests/functional/repl.sh
View file

@ -271,3 +271,8 @@ a = ''test string that we'll grep later''
:e identity
a
" "undefined variable"
# Test :log with derivation paths.
simple_path="$(nix-instantiate "$testDir/simple.nix")"
# `PATH=` is a part of build log.
testReplResponseNoRegex ":log ${simple_path}" "PATH="