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Merge branch 'fetchGit-fast-revision-update'

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This commit is contained in:
Shea Levy 2017-12-05 11:16:39 -05:00
parent 7f2c324ed1 eedbc4e06c
commit 11a7f8ce14
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3 changed files with 43 additions and 24 deletions
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59
src/libexpr/primops/fetchGit.cc
View file

@ -89,32 +89,43 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
Path localRefFile = cacheDir + "/refs/heads/" + localRef;
/* If the local ref is older than ‘tarball-ttl’ seconds, do a git
fetch to update the local ref to the remote ref. */
bool doFetch;
time_t now = time(0);
struct stat st;
if (stat(localRefFile.c_str(), &st) != 0 ||
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));
// FIXME: git stderr messes up our progress indicator, so
// we're using --quiet for now. Should process its stderr.
runProgram("git", true, { "-C", cacheDir, "fetch", "--quiet", "--force", "--", uri, *ref + ":" + localRef });
struct timeval times[2];
times[0].tv_sec = now;
times[0].tv_usec = 0;
times[1].tv_sec = now;
times[1].tv_usec = 0;
utimes(localRefFile.c_str(), times);
/* If a rev was specified, we need to fetch if it's not in the
repo. */
if (rev != "") {
try {
runProgram("git", true, { "-C", cacheDir, "cat-file", "-e", rev });
doFetch = false;
} catch (ExecError & e) {
if (WIFEXITED(e.status)) {
doFetch = true;
} else {
throw;
}
}
} else {
/* If the local ref is older than ‘tarball-ttl’ seconds, do a
git fetch to update the local ref to the remote ref. */
struct stat st;
doFetch = stat(localRefFile.c_str(), &st) != 0 ||
st.st_mtime <= now - settings.tarballTtl;
}
if (doFetch)
{
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Git repository '%s'", uri));
// FIXME: git stderr messes up our progress indicator, so
// we're using --quiet for now. Should process its stderr.
runProgram("git", true, { "-C", cacheDir, "fetch", "--quiet", "--force", "--", uri, *ref + ":" + localRef });
struct timeval times[2];
times[0].tv_sec = now;
times[0].tv_usec = 0;
times[1].tv_sec = now;
times[1].tv_usec = 0;
utimes(localRefFile.c_str(), times);
}
// FIXME: check whether rev is an ancestor of ref.

1
tests/common.sh.in
View file

@ -21,6 +21,7 @@ export NIX_REMOTE=$NIX_REMOTE_
unset NIX_PATH
export TEST_HOME=$TEST_ROOT/test-home
export HOME=$TEST_HOME
unset XDG_CACHE_HOME
mkdir -p $TEST_HOME
export PATH=@bindir@:$PATH

7
tests/fetchGit.sh
View file

@ -86,3 +86,10 @@ git -C $repo commit -m 'Bla3' -a
path4=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit file://$repo).outPath")
[[ $path2 = $path4 ]]
# tarball-ttl should be ignored if we specify a rev
echo delft > $repo/hello
git -C $repo add hello
git -C $repo commit -m 'Bla4'
rev3=$(git -C $repo rev-parse HEAD)
nix eval --tarball-ttl 3600 "(builtins.fetchGit { url = $repo; rev = \"$rev3\"; })" >/dev/null