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libfetchers: write git commit message to tempfile

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we want to remove runProgram's ability to provide stdin to a process
because the concurrency issues of handling both stdin and stdout are
much more pronounced once runProgram returns not is collected output
but a source. this is possible in the current c++ framework, however
it isn't necessary in almost all cases (as demonstrated by only this
single user existing) and in much better handled with a proper async
concurrency model that lets the caller handle both at the same time.

Change-Id: I29da1e1ad898d45e2e33a7320b246d5003e7712b
This commit is contained in:
eldritch horrors 2024-06-23 15:10:31 +02:00
parent 2fe9157808
commit 2bbdaf0b19
1 changed files with 5 additions and 2 deletions
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7
src/libfetchers/git.cc
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@ -396,12 +396,15 @@ struct GitInputScheme : InputScheme
if (commitMsg) { if (commitMsg) {
auto [_fd, msgPath] = createTempFile("nix-msg");
AutoDelete const _delete{msgPath};
writeFile(msgPath, *commitMsg);
// Pause the logger to allow for user input (such as a gpg passphrase) in `git commit` // Pause the logger to allow for user input (such as a gpg passphrase) in `git commit`
logger->pause(); logger->pause();
Finally restoreLogger([]() { logger->resume(); }); Finally restoreLogger([]() { logger->resume(); });
runProgram("git", true, runProgram("git", true,
{ "-C", *root, "--git-dir", gitDir, "commit", std::string(path.rel()), "-F", "-" }, { "-C", *root, "--git-dir", gitDir, "commit", std::string(path.rel()), "-F", msgPath });
*commitMsg);
} }
} }
} }