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Merge branch 'git-rev-error' of https://github.com/Ma27/nix into master

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This commit is contained in:
Eelco Dolstra 2020-12-22 16:39:32 +01:00
commit f4a9fb67da
3 changed files with 58 additions and 9 deletions
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5
src/libexpr/primops/fetchTree.cc
View file

@ -324,6 +324,11 @@ static RegisterPrimOp primop_fetchGit({
A Boolean parameter that specifies whether submodules should be
checked out. Defaults to `false`.
- allRefs
Whether to fetch all refs of the repository. With this argument being
true, it's possible to load a `rev` from *any* `ref` (by default only
`rev`s from the specified `ref` are supported).
Here are some examples of how to use `fetchGit`.
- To fetch a private repository over SSH:

49
src/libfetchers/git.cc
View file

@ -59,12 +59,13 @@ struct GitInputScheme : InputScheme
if (maybeGetStrAttr(attrs, "type") != "git") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash")
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash" && name != "allRefs")
throw Error("unsupported Git input attribute '%s'", name);
parseURL(getStrAttr(attrs, "url"));
maybeGetBoolAttr(attrs, "shallow");
maybeGetBoolAttr(attrs, "submodules");
maybeGetBoolAttr(attrs, "allRefs");
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (std::regex_search(*ref, badGitRefRegex))
@ -169,10 +170,12 @@ struct GitInputScheme : InputScheme
bool shallow = maybeGetBoolAttr(input.attrs, "shallow").value_or(false);
bool submodules = maybeGetBoolAttr(input.attrs, "submodules").value_or(false);
bool allRefs = maybeGetBoolAttr(input.attrs, "allRefs").value_or(false);
std::string cacheType = "git";
if (shallow) cacheType += "-shallow";
if (submodules) cacheType += "-submodules";
if (allRefs) cacheType += "-all-refs";
auto getImmutableAttrs = [&]()
{
@ -338,11 +341,15 @@ struct GitInputScheme : InputScheme
}
}
} 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 ||
(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now;
if (allRefs) {
doFetch = true;
} 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 ||
(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now;
}
}
if (doFetch) {
@ -352,9 +359,11 @@ struct GitInputScheme : InputScheme
// we're using --quiet for now. Should process its stderr.
try {
auto ref = input.getRef();
auto fetchRef = ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
auto fetchRef = allRefs
? "refs/*"
: ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", fetchRef, fetchRef) });
} catch (Error & e) {
if (!pathExists(localRefFile)) throw;
@ -392,6 +401,28 @@ struct GitInputScheme : InputScheme
AutoDelete delTmpDir(tmpDir, true);
PathFilter filter = defaultPathFilter;
RunOptions checkCommitOpts(
"git",
{ "-C", repoDir, "cat-file", "commit", input.getRev()->gitRev() }
);
checkCommitOpts.searchPath = true;
checkCommitOpts.mergeStderrToStdout = true;
auto result = runProgram(checkCommitOpts);
if (WEXITSTATUS(result.first) == 128
&& result.second.find("bad file") != std::string::npos
) {
throw Error(
"Cannot find Git revision '%s' in ref '%s' of repository '%s'! "
"Please make sure that the " ANSI_BOLD "rev" ANSI_NORMAL " exists on the "
ANSI_BOLD "ref" ANSI_NORMAL " you've specified or add " ANSI_BOLD
"allRefs = true;" ANSI_NORMAL " to " ANSI_BOLD "fetchGit" ANSI_NORMAL ".",
input.getRev()->gitRev(),
*input.getRef(),
actualUrl
);
}
if (submodules) {
Path tmpGitDir = createTempDir();
AutoDelete delTmpGitDir(tmpGitDir, true);

13
tests/fetchGit.sh
View file

@ -41,6 +41,19 @@ export _NIX_FORCE_HTTP=1
path=$(nix eval --impure --raw --expr "(builtins.fetchGit file://$repo).outPath")
[[ $(cat $path/hello) = world ]]
# Fetch a rev from another branch
git -C $repo checkout -b devtest
echo "different file" >> $TEST_ROOT/git/differentbranch
git -C $repo add differentbranch
git -C $repo commit -m 'Test2'
git -C $repo checkout master
devrev=$(git -C $repo rev-parse devtest)
out=$(nix eval --impure --raw --expr "builtins.fetchGit { url = file://$repo; rev = \"$devrev\"; }" 2>&1) || status=$?
[[ $status == 1 ]]
[[ $out =~ 'Cannot find Git revision' ]]
[[ $(nix eval --raw --expr "builtins.readFile (builtins.fetchGit { url = file://$repo; rev = \"$devrev\"; allRefs = true; } + \"/differentbranch\")") = 'different file' ]]
# In pure eval mode, fetchGit without a revision should fail.
[[ $(nix eval --impure --raw --expr "builtins.readFile (fetchGit file://$repo + \"/hello\")") = world ]]
(! nix eval --raw --expr "builtins.readFile (fetchGit file://$repo + \"/hello\")")