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fetchGit: Don't do a remote fetch if we already have the rev

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This commit is contained in:
Eelco Dolstra 2017-11-03 13:33:15 +01:00
parent 9ccea31dc2
commit 0e77aa3982
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GPG key ID: 8170B4726D7198DE
1 changed files with 20 additions and 12 deletions
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12
src/libexpr/primops/fetchgit.cc
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@ -45,8 +45,10 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
PathFilter filter = [&](const Path & p) -> bool {
assert(hasPrefix(p, uri));
auto st = lstat(p);
if (S_ISDIR(st.st_mode)) return true;
std::string file(p, uri.size() + 1);
if (file == ".git") return false;
// FIXME: filter out directories with no tracked files.
if (S_ISDIR(st.st_mode)) return true;
return files.count(file);
};
@ -80,7 +82,12 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
time_t now = time(0);
struct stat st;
if (stat(localRefFile.c_str(), &st) != 0 ||
st.st_mtime < now - settings.tarballTtl)
st.st_mtime <= now - settings.tarballTtl)
{
if (rev == "" ||
chomp(runProgram(
RunOptions("git", { "-C", cacheDir, "cat-file", "-t", rev })
.killStderr(true)).second) != "commit")
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Git repository '%s'", uri));
@ -96,6 +103,7 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
utimes(localRefFile.c_str(), times);
}
}
// FIXME: check whether rev is an ancestor of ref.
GitInfo gitInfo;