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Don't ignore unstaged files in local flakes #6858

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Don't ignore unstaged files in local flakes #6858

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16 changes: 9 additions & 7 deletions src/libfetchers/git.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -181,18 +181,16 @@ WorkdirInfo getWorkdirInfo(const Input & input, const Path & workdir)

try {
if (hasHead) {
// Using git diff is preferrable over lower-level operations here,
// because its conceptually simpler and we only need the exit code anyways.
auto gitDiffOpts = Strings({ "-C", workdir, "--git-dir", gitDir, "diff", "HEAD", "--quiet"});
// Use git status --short to list changed and untracked files.
// The output will be empty if there are none and the tree is clean
auto gitDiffOpts = Strings({ "-C", workdir, "--git-dir", gitDir, "status", "--short"});
if (!submodules) {
// Changes in submodules should only make the tree dirty
// when those submodules will be copied as well.
gitDiffOpts.emplace_back("--ignore-submodules");
}
gitDiffOpts.emplace_back("--");
runProgram("git", true, gitDiffOpts);

clean = true;
clean = (chomp(runProgram("git", true, gitDiffOpts)) == "");
}
} catch (ExecError & e) {
if (!WIFEXITED(e.status) || WEXITSTATUS(e.status) != 1) throw;
Expand All @@ -212,9 +210,13 @@ std::pair<StorePath, Input> fetchFromWorkdir(ref<Store> store, Input & input, co
if (fetchSettings.warnDirty)
warn("Git tree '%s' is dirty", workdir);

auto gitOpts = Strings({ "-C", workdir, "--git-dir", gitDir, "ls-files", "-z" });
auto gitOpts = Strings({ "-C", workdir, "--git-dir", gitDir, "ls-files", "--cached", "-z" });
if (submodules)
gitOpts.emplace_back("--recurse-submodules");
else {
gitOpts.emplace_back("--others");
gitOpts.emplace_back("--exclude-standard");
}

auto files = tokenizeString<std::set<std::string>>(
runProgram("git", true, gitOpts), "\0"s);
Expand Down