revwalk: relax the parsing of the commit time

src/revwalk.c

@@ -188,7 +188,7 @@ static int commit_quick_parse(git_revwalk *walk, commit_object *commit, git_rawo
 	const size_t parent_len = strlen("parent ") + GIT_OID_HEXSZ + 1;
 	unsigned char *buffer = raw->data;
 	unsigned char *buffer_end = buffer + raw->len;
-	unsigned char *parents_start;
+	unsigned char *parents_start, *committer_start;
 	int i, parents = 0;
 	int commit_time;
 
@@ -219,17 +219,34 @@ static int commit_quick_parse(git_revwalk *walk, commit_object *commit, git_rawo
 
 	commit->out_degree = (unsigned short)parents;
 
+	if ((committer_start = buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL)
+		return commit_error(commit, "object is corrupted");
+
+	buffer++;
+
 	if ((buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL)
 		return commit_error(commit, "object is corrupted");
 
-	if ((buffer = memchr(buffer, '<', buffer_end - buffer)) == NULL ||
-		(buffer = memchr(buffer, '>', buffer_end - buffer)) == NULL)
-		return commit_error(commit, "malformed author information");
+	/* Skip trailing spaces */
+	while (buffer > committer_start && git__isspace(*buffer))
+		buffer--;
+
+	/* Seek for the begining of the pack of digits */
+	while (buffer > committer_start && git__isdigit(*buffer))
+		buffer--;
 
-	while (*buffer == '>' || git__isspace(*buffer))
-		buffer++;
+	/* Skip potential timezone offset */
+	if ((buffer > committer_start) && (*buffer == '+' || *buffer == '-')) {
+		buffer--;
+
+		while (buffer > committer_start && git__isspace(*buffer))
+			buffer--;
+
+		while (buffer > committer_start && git__isdigit(*buffer))
+			buffer--;
+	}
 
-	if (git__strtol32(&commit_time, (char *)buffer, NULL, 10) < 0)
+	if ((buffer == committer_start) || (git__strtol32(&commit_time, (char *)(buffer + 1), NULL, 10) < 0))
 		return commit_error(commit, "cannot parse commit time");
 
 	commit->time = (time_t)commit_time;

tests-clar/revwalk/signatureparsing.c

+#include "clar_libgit2.h"
+
+static git_repository *_repo;
+static git_revwalk *_walk;
+
+void test_revwalk_signatureparsing__initialize(void)
+{
+	cl_git_pass(git_repository_open(&_repo, cl_fixture("testrepo.git")));
+	cl_git_pass(git_revwalk_new(&_walk, _repo));
+}
+
+void test_revwalk_signatureparsing__cleanup(void)
+{
+	git_revwalk_free(_walk);
+	git_repository_free(_repo);
+}
+
+void test_revwalk_signatureparsing__do_not_choke_when_name_contains_angle_brackets(void)
+{
+	git_reference *ref;
+	git_oid commit_oid;
+	git_commit *commit;
+	const git_signature *signature;
+
+	/*
+	 * The branch below points at a commit with angle brackets in the committer/author name
+	 * committer <Yu V. Bin Haacked> <foo@example.com> 1323847743 +0100
+	 */
+	cl_git_pass(git_reference_lookup(&ref, _repo, "refs/heads/haacked"));
+
+	git_revwalk_push(_walk, git_reference_oid(ref));
+	cl_git_pass(git_revwalk_next(&commit_oid, _walk));
+
+	cl_git_pass(git_commit_lookup(&commit, _repo, git_reference_oid(ref)));
+
+	signature = git_commit_committer(commit);
+	cl_assert_equal_s("Yu V. Bin Haacked", signature->email);
+	cl_assert_equal_s("", signature->name);
+	cl_assert_equal_i(1323847743, (int)signature->when.time);
+	cl_assert_equal_i(60, signature->when.offset);
+
+	git_commit_free(commit);
+	git_reference_free(ref);
+}