diff options
Diffstat (limited to 'src/libfetchers/git.cc')
-rw-r--r-- | src/libfetchers/git.cc | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/src/libfetchers/git.cc b/src/libfetchers/git.cc index d75c5d3ae..af40990e5 100644 --- a/src/libfetchers/git.cc +++ b/src/libfetchers/git.cc @@ -21,16 +21,23 @@ namespace nix::fetchers { // old version of git, which will ignore unrecognized `-c` options. const std::string gitInitialBranch = "__nix_dummy_branch"; +static std::string getGitDir() +{ + auto gitDir = getEnv("GIT_DIR"); + if (!gitDir) { + return ".git"; + } + return *gitDir; +} + static std::string readHead(const Path & path) { - return chomp(runProgram("git", true, { "-C", path, "rev-parse", "--abbrev-ref", "HEAD" })); + return chomp(runProgram("git", true, { "-C", path, "--git-dir", ".git", "rev-parse", "--abbrev-ref", "HEAD" })); } static bool isNotDotGitDirectory(const Path & path) { - static const std::regex gitDirRegex("^(?:.*/)?\\.git$"); - - return not std::regex_match(path, gitDirRegex); + return baseNameOf(path) != ".git"; } struct GitInputScheme : InputScheme @@ -152,13 +159,14 @@ struct GitInputScheme : InputScheme { auto sourcePath = getSourcePath(input); assert(sourcePath); + auto gitDir = getGitDir(); runProgram("git", true, - { "-C", *sourcePath, "add", "--force", "--intent-to-add", "--", std::string(file) }); + { "-C", *sourcePath, "--git-dir", gitDir, "add", "--force", "--intent-to-add", "--", std::string(file) }); if (commitMsg) runProgram("git", true, - { "-C", *sourcePath, "commit", std::string(file), "-m", *commitMsg }); + { "-C", *sourcePath, "--git-dir", gitDir, "commit", std::string(file), "-m", *commitMsg }); } std::pair<bool, std::string> getActualUrl(const Input & input) const @@ -177,6 +185,7 @@ struct GitInputScheme : InputScheme std::pair<StorePath, Input> fetch(ref<Store> store, const Input & _input) override { Input input(_input); + auto gitDir = getGitDir(); std::string name = input.getName(); @@ -189,8 +198,16 @@ struct GitInputScheme : InputScheme if (submodules) cacheType += "-submodules"; if (allRefs) cacheType += "-all-refs"; + auto checkHashType = [&](const std::optional<Hash> & hash) + { + if (hash.has_value() && !(hash->type == htSHA1 || hash->type == htSHA256)) + throw Error("Hash '%s' is not supported by Git. Supported types are sha1 and sha256.", hash->to_string(Base16, true)); + }; + auto getLockedAttrs = [&]() { + checkHashType(input.getRev()); + return Attrs({ {"type", cacheType}, {"name", name}, @@ -231,7 +248,7 @@ struct GitInputScheme : InputScheme since that is the refrence we want to use later on. */ auto result = runProgram(RunOptions { .program = "git", - .args = { "-C", actualUrl, "--git-dir=.git", "rev-parse", "--verify", "--no-revs", "HEAD^{commit}" }, + .args = { "-C", actualUrl, "--git-dir", gitDir, "rev-parse", "--verify", "--no-revs", "HEAD^{commit}" }, .environment = env, .mergeStderrToStdout = true }); @@ -253,7 +270,7 @@ struct GitInputScheme : InputScheme if (hasHead) { // Using git diff is preferrable over lower-level operations here, // because its conceptually simpler and we only need the exit code anyways. - auto gitDiffOpts = Strings({ "-C", actualUrl, "diff", "HEAD", "--quiet"}); + auto gitDiffOpts = Strings({ "-C", actualUrl, "--git-dir", gitDir, "diff", "HEAD", "--quiet"}); if (!submodules) { // Changes in submodules should only make the tree dirty // when those submodules will be copied as well. @@ -278,16 +295,18 @@ struct GitInputScheme : InputScheme if (fetchSettings.warnDirty) warn("Git tree '%s' is dirty", actualUrl); - auto gitOpts = Strings({ "-C", actualUrl, "ls-files", "-z" }); + auto gitOpts = Strings({ "-C", actualUrl, "--git-dir", gitDir, "ls-files", "-z" }); if (submodules) gitOpts.emplace_back("--recurse-submodules"); auto files = tokenizeString<std::set<std::string>>( runProgram("git", true, gitOpts), "\0"s); + Path actualPath(absPath(actualUrl)); + PathFilter filter = [&](const Path & p) -> bool { - assert(hasPrefix(p, actualUrl)); - std::string file(p, actualUrl.size() + 1); + assert(hasPrefix(p, actualPath)); + std::string file(p, actualPath.size() + 1); auto st = lstat(p); @@ -300,13 +319,13 @@ struct GitInputScheme : InputScheme return files.count(file); }; - auto storePath = store->addToStore(input.getName(), actualUrl, FileIngestionMethod::Recursive, htSHA256, filter); + auto storePath = store->addToStore(input.getName(), actualPath, FileIngestionMethod::Recursive, htSHA256, filter); // FIXME: maybe we should use the timestamp of the last // modified dirty file? input.attrs.insert_or_assign( "lastModified", - hasHead ? std::stoull(runProgram("git", true, { "-C", actualUrl, "log", "-1", "--format=%ct", "--no-show-signature", "HEAD" })) : 0); + hasHead ? std::stoull(runProgram("git", true, { "-C", actualPath, "--git-dir", gitDir, "log", "-1", "--format=%ct", "--no-show-signature", "HEAD" })) : 0); return {std::move(storePath), input}; } @@ -327,7 +346,7 @@ struct GitInputScheme : InputScheme if (!input.getRev()) input.attrs.insert_or_assign("rev", - Hash::parseAny(chomp(runProgram("git", true, { "-C", actualUrl, "rev-parse", *input.getRef() })), htSHA1).gitRev()); + Hash::parseAny(chomp(runProgram("git", true, { "-C", actualUrl, "--git-dir", gitDir, "rev-parse", *input.getRef() })), htSHA1).gitRev()); repoDir = actualUrl; @@ -343,6 +362,7 @@ struct GitInputScheme : InputScheme Path cacheDir = getCacheDir() + "/nix/gitv3/" + hashString(htSHA256, actualUrl).to_string(Base32, false); repoDir = cacheDir; + gitDir = "."; createDirs(dirOf(cacheDir)); PathLocks cacheDirLock({cacheDir + ".lock"}); @@ -419,7 +439,7 @@ struct GitInputScheme : InputScheme // cache dir lock is removed at scope end; we will only use read-only operations on specific revisions in the remainder } - bool isShallow = chomp(runProgram("git", true, { "-C", repoDir, "rev-parse", "--is-shallow-repository" })) == "true"; + bool isShallow = chomp(runProgram("git", true, { "-C", repoDir, "--git-dir", gitDir, "rev-parse", "--is-shallow-repository" })) == "true"; if (isShallow && !shallow) throw Error("'%s' is a shallow Git repository, but a non-shallow repository is needed", actualUrl); |