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Explicitly set initial branch name for git

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oxalica 2021-09-24 22:01:27 +08:00
parent 362d8f925e
commit 81b8e910a0
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1 changed files with 8 additions and 2 deletions
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10
src/libfetchers/git.cc
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@ -13,6 +13,12 @@ using namespace std::string_literals;
namespace nix::fetchers { namespace nix::fetchers {
// Explicit initial branch of our bare repo to suppress warnings from new version of git.
// The value itself does not matter, since we always fetch a specific revision or branch.
// It is set with `-c init.defaultBranch=` instead of `--initial-branch=` to stay compatible with
// old version of git, which will ignore unrecognized `-c` options.
const std::string gitInitialBranch = "__nix_dummy_branch";
static std::string readHead(const Path & path) static std::string readHead(const Path & path)
{ {
return chomp(runProgram("git", true, { "-C", path, "rev-parse", "--abbrev-ref", "HEAD" })); return chomp(runProgram("git", true, { "-C", path, "rev-parse", "--abbrev-ref", "HEAD" }));
@ -324,7 +330,7 @@ struct GitInputScheme : InputScheme
lockFile(lock.get(), ltWrite, true); lockFile(lock.get(), ltWrite, true);
if (!pathExists(cacheDir)) { if (!pathExists(cacheDir)) {
runProgram("git", true, { "init", "--bare", repoDir }); runProgram("git", true, { "-c", "init.defaultBranch=" + gitInitialBranch, "init", "--bare", repoDir });
} }
deleteLockFile(cacheDirLock, lock.get()); deleteLockFile(cacheDirLock, lock.get());
@ -436,7 +442,7 @@ struct GitInputScheme : InputScheme
Path tmpGitDir = createTempDir(); Path tmpGitDir = createTempDir();
AutoDelete delTmpGitDir(tmpGitDir, true); AutoDelete delTmpGitDir(tmpGitDir, true);
runProgram("git", true, { "init", tmpDir, "--separate-git-dir", tmpGitDir }); runProgram("git", true, { "-c", "init.defaultBranch=" + gitInitialBranch, "init", tmpDir, "--separate-git-dir", tmpGitDir });
// TODO: repoDir might lack the ref (it only checks if rev // TODO: repoDir might lack the ref (it only checks if rev
// exists, see FIXME above) so use a big hammer and fetch // exists, see FIXME above) so use a big hammer and fetch
// everything to ensure we get the rev. // everything to ensure we get the rev.