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Merge branch 'fetchgit-recursive' of https://github.com/blitz/nix

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This commit is contained in:
Eelco Dolstra 2020-04-07 13:45:17 +02:00
commit 55cefd41d6
5 changed files with 170 additions and 21 deletions
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20
src/libexpr/primops/fetchGit.cc
View file

@ -13,6 +13,7 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
std::optional<std::string> ref;
std::optional<Hash> rev;
std::string name = "source";
bool fetchSubmodules = false;
PathSet context;
state.forceValue(*args[0]);
@ -31,6 +32,8 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
rev = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA1);
else if (n == "name")
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "submodules")
fetchSubmodules = state.forceBool(*attr.value, *attr.pos);
else
throw EvalError("unsupported argument '%s' to 'fetchGit', at %s", attr.name, *attr.pos);
}
@ -48,15 +51,15 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
if (evalSettings.pureEval && !rev)
throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
auto parsedUrl = parseURL(
url.find("://") != std::string::npos
? "git+" + url
: "git+file://" + url);
if (ref) parsedUrl.query.insert_or_assign("ref", *ref);
if (rev) parsedUrl.query.insert_or_assign("rev", rev->gitRev());
// FIXME: use name
auto input = fetchers::inputFromURL(parsedUrl);
fetchers::Attrs attrs;
attrs.insert_or_assign("type", "git");
attrs.insert_or_assign("url", url.find("://") != std::string::npos ? url : "file://" + url);
if (ref) attrs.insert_or_assign("ref", *ref);
if (rev) attrs.insert_or_assign("rev", rev->gitRev());
if (fetchSubmodules) attrs.insert_or_assign("submodules", true);
auto input = fetchers::inputFromAttrs(attrs);
// FIXME: use name?
auto [tree, input2] = input->fetchTree(state.store);
state.mkAttrs(v, 8);
@ -70,6 +73,7 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
// Backward compatibility: set 'revCount' to 0 for a dirty tree.
mkInt(*state.allocAttr(v, state.symbols.create("revCount")),
tree.info.revCount.value_or(0));
mkBool(*state.allocAttr(v, state.symbols.create("submodules")), fetchSubmodules);
v.attrs->sort();
if (state.allowedPaths)

63
src/libfetchers/git.cc
View file

@ -15,12 +15,20 @@ static std::string readHead(const Path & path)
return chomp(runProgram("git", true, { "-C", path, "rev-parse", "--abbrev-ref", "HEAD" }));
}
static bool isNotDotGitDirectory(const Path & path)
{
static const std::regex gitDirRegex("^(?:.*/)?\\.git$");
return not std::regex_match(path, gitDirRegex);
}
struct GitInput : Input
{
ParsedURL url;
std::optional<std::string> ref;
std::optional<Hash> rev;
bool shallow = false;
bool submodules = false;
GitInput(const ParsedURL & url) : url(url)
{ }
@ -66,6 +74,8 @@ struct GitInput : Input
attrs.emplace("rev", rev->gitRev());
if (shallow)
attrs.emplace("shallow", true);
if (submodules)
attrs.emplace("submodules", true);
return attrs;
}
@ -87,7 +97,9 @@ struct GitInput : Input
assert(!rev || rev->type == htSHA1);
auto cacheType = shallow ? "git-shallow" : "git";
std::string cacheType = "git";
if (shallow) cacheType += "-shallow";
if (submodules) cacheType += "-submodules";
auto getImmutableAttrs = [&]()
{
@ -161,8 +173,12 @@ struct GitInput : Input
if (settings.warnDirty)
warn("Git tree '%s' is dirty", actualUrl);
auto gitOpts = Strings({ "-C", actualUrl, "ls-files", "-z" });
if (submodules)
gitOpts.emplace_back("--recurse-submodules");
auto files = tokenizeString<std::set<std::string>>(
runProgram("git", true, { "-C", actualUrl, "ls-files", "-z" }), "\0"s);
runProgram("git", true, gitOpts), "\0"s);
PathFilter filter = [&](const Path & p) -> bool {
assert(hasPrefix(p, actualUrl));
@ -299,20 +315,39 @@ struct GitInput : Input
if (auto res = getCache()->lookup(store, getImmutableAttrs()))
return makeResult(res->first, std::move(res->second));
// FIXME: should pipe this, or find some better way to extract a
// revision.
auto source = sinkToSource([&](Sink & sink) {
RunOptions gitOptions("git", { "-C", repoDir, "archive", input->rev->gitRev() });
gitOptions.standardOut = &sink;
runProgram2(gitOptions);
});
Path tmpDir = createTempDir();
AutoDelete delTmpDir(tmpDir, true);
PathFilter filter = defaultPathFilter;
unpackTarfile(*source, tmpDir);
if (submodules) {
Path tmpGitDir = createTempDir();
AutoDelete delTmpGitDir(tmpGitDir, true);
auto storePath = store->addToStore(name, tmpDir);
runProgram("git", true, { "init", tmpDir, "--separate-git-dir", tmpGitDir });
// TODO: repoDir might lack the ref (it only checks if rev
// exists, see FIXME above) so use a big hammer and fetch
// everything to ensure we get the rev.
runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
"--update-head-ok", "--", repoDir, "refs/*:refs/*" });
runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", input->rev->gitRev() });
runProgram("git", true, { "-C", tmpDir, "remote", "add", "origin", actualUrl });
runProgram("git", true, { "-C", tmpDir, "submodule", "--quiet", "update", "--init", "--recursive" });
filter = isNotDotGitDirectory;
} else {
// FIXME: should pipe this, or find some better way to extract a
// revision.
auto source = sinkToSource([&](Sink & sink) {
RunOptions gitOptions("git", { "-C", repoDir, "archive", input->rev->gitRev() });
gitOptions.standardOut = &sink;
runProgram2(gitOptions);
});
unpackTarfile(*source, tmpDir);
}
auto storePath = store->addToStore(name, tmpDir, true, htSHA256, filter);
auto lastModified = std::stoull(runProgram("git", true, { "-C", repoDir, "log", "-1", "--format=%ct", input->rev->gitRev() }));
@ -378,7 +413,7 @@ 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")
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules")
throw Error("unsupported Git input attribute '%s'", name);
auto input = std::make_unique<GitInput>(parseURL(getStrAttr(attrs, "url")));
@ -392,6 +427,8 @@ struct GitInputScheme : InputScheme
input->shallow = maybeGetBoolAttr(attrs, "shallow").value_or(false);
input->submodules = maybeGetBoolAttr(attrs, "submodules").value_or(false);
return input;
}
};