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

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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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32
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 { PathFilter filter = [&](const Path & p) -> bool {
assert(hasPrefix(p, uri)); assert(hasPrefix(p, uri));
auto st = lstat(p); auto st = lstat(p);
if (S_ISDIR(st.st_mode)) return true;
std::string file(p, uri.size() + 1); 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); return files.count(file);
}; };
@ -80,21 +82,27 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
time_t now = time(0); time_t now = time(0);
struct stat st; struct stat st;
if (stat(localRefFile.c_str(), &st) != 0 || if (stat(localRefFile.c_str(), &st) != 0 ||
st.st_mtime < now - settings.tarballTtl) st.st_mtime <= now - settings.tarballTtl)
{ {
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Git repository '%s'", uri)); 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));
// FIXME: git stderr messes up our progress indicator, so // FIXME: git stderr messes up our progress indicator, so
// we're using --quiet for now. Should process its stderr. // we're using --quiet for now. Should process its stderr.
runProgram("git", true, { "-C", cacheDir, "fetch", "--quiet", "--force", "--", uri, *ref + ":" + localRef }); runProgram("git", true, { "-C", cacheDir, "fetch", "--quiet", "--force", "--", uri, *ref + ":" + localRef });
struct timeval times[2]; struct timeval times[2];
times[0].tv_sec = now; times[0].tv_sec = now;
times[0].tv_usec = 0; times[0].tv_usec = 0;
times[1].tv_sec = now; times[1].tv_sec = now;
times[1].tv_usec = 0; times[1].tv_usec = 0;
utimes(localRefFile.c_str(), times); utimes(localRefFile.c_str(), times);
}
} }
// FIXME: check whether rev is an ancestor of ref. // FIXME: check whether rev is an ancestor of ref.