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Merge pull request #7774 from edolstra/submodule-fixes

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Git submodule fixes
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Eelco Dolstra 2023-02-09 17:19:48 +01:00 committed by GitHub
parent e46429f674 862e56c23d
commit 0a7071ed33
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 59 additions and 7 deletions
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29
src/libfetchers/git.cc
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@ -615,15 +615,42 @@ struct GitInputScheme : InputScheme
AutoDelete delTmpGitDir(tmpGitDir, true); AutoDelete delTmpGitDir(tmpGitDir, true);
runProgram("git", true, { "-c", "init.defaultBranch=" + gitInitialBranch, "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.
Activity act(*logger, lvlTalkative, actUnknown, fmt("making temporary clone of '%s'", repoDir));
runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force", runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
"--update-head-ok", "--", repoDir, "refs/*:refs/*" }); "--update-head-ok", "--", repoDir, "refs/*:refs/*" });
}
runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input.getRev()->gitRev() }); runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input.getRev()->gitRev() });
runProgram("git", true, { "-C", tmpDir, "remote", "add", "origin", actualUrl });
/* Ensure that we use the correct origin for fetching
submodules. This matters for submodules with relative
URLs. */
if (isLocal) {
writeFile(tmpGitDir + "/config", readFile(repoDir + "/" + gitDir + "/config"));
/* Restore the config.bare setting we may have just
copied erroneously from the user's repo. */
runProgram("git", true, { "-C", tmpDir, "config", "core.bare", "false" });
} else
runProgram("git", true, { "-C", tmpDir, "config", "remote.origin.url", actualUrl });
/* As an optimisation, copy the modules directory of the
source repo if it exists. */
auto modulesPath = repoDir + "/" + gitDir + "/modules";
if (pathExists(modulesPath)) {
Activity act(*logger, lvlTalkative, actUnknown, fmt("copying submodules of '%s'", actualUrl));
runProgram("cp", true, { "-R", "--", modulesPath, tmpGitDir + "/modules" });
}
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching submodules of '%s'", actualUrl));
runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" }); runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" });
}
filter = isNotDotGitDirectory; filter = isNotDotGitDirectory;
} else { } else {

25
tests/fetchGitSubmodules.sh
View file

@ -104,3 +104,28 @@ noSubmoduleRepoBaseline=$(nix eval --raw --expr "(builtins.fetchGit { url = file
noSubmoduleRepo=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$subRepo; rev = \"$subRev\"; submodules = true; }).outPath") noSubmoduleRepo=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$subRepo; rev = \"$subRev\"; submodules = true; }).outPath")
[[ $noSubmoduleRepoBaseline == $noSubmoduleRepo ]] [[ $noSubmoduleRepoBaseline == $noSubmoduleRepo ]]
# Test relative submodule URLs.
rm $TEST_HOME/.cache/nix/fetcher-cache*
rm -rf $rootRepo/.git $rootRepo/.gitmodules $rootRepo/sub
initGitRepo $rootRepo
git -C $rootRepo submodule add ../gitSubmodulesSub sub
git -C $rootRepo commit -m "Add submodule"
rev2=$(git -C $rootRepo rev-parse HEAD)
pathWithRelative=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev2\"; submodules = true; }).outPath")
diff -r -x .gitmodules $pathWithSubmodules $pathWithRelative
# Test clones that have an upstream with relative submodule URLs.
rm $TEST_HOME/.cache/nix/fetcher-cache*
cloneRepo=$TEST_ROOT/a/b/gitSubmodulesClone # NB /a/b to make the relative path not work relative to $cloneRepo
git clone $rootRepo $cloneRepo
pathIndirect=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$cloneRepo; rev = \"$rev2\"; submodules = true; }).outPath")
[[ $pathIndirect = $pathWithRelative ]]
# Test that if the clone has the submodule already, we're not fetching
# it again.
git -C $cloneRepo submodule update --init
rm $TEST_HOME/.cache/nix/fetcher-cache*
rm -rf $subRepo
pathSubmoduleGone=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$cloneRepo; rev = \"$rev2\"; submodules = true; }).outPath")
[[ $pathSubmoduleGone = $pathWithRelative ]]