From 9a7bbd1dd1db45b474576ca328aa7056cdd081e0 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 16 Jun 2008 12:15:02 -0400 Subject: [PATCH] clean up error conventions of remote.c:match_explicit match_explicit is called for each push refspec to try to fully resolve the source and destination sides of the refspec. Currently, we look at each refspec and report errors on both the source and the dest side before aborting. It makes sense to report errors for each refspec, since an error in one is independent of an error in the other. However, reporting errors on the 'dst' side of a refspec if there has been an error on the 'src' side does not necessarily make sense, since the interpretation of the 'dst' side depends on the 'src' side (for example, when creating a new unqualified remote ref, we use the same type as the src ref). This patch lets match_explicit return early when the src side of the refspec is bogus. We still look at all of the refspecs before aborting the push, though. At the same time, we clean up the call signature, which previously took an extra "errs" flag. This was pointless, as we didn't act on that flag, but rather just passed it back to the caller. Instead, we now use the more traditional "return -1" to signal an error, and the caller aggregates the error count. This change fixes two bugs, as well: - the early return avoids a segfault when passing a NULL matched_src to guess_ref() - the check for multiple sources pointing to a single dest aborted if the "err" flag was set. Presumably the intent was not to bother with the check if we had no matched_src. However, since the err flag was passed in from the caller, we might abort the check just because a previous refspec had a problem, which doesn't make sense. In practice, this didn't matter, since due to the error flag we end up aborting the push anyway. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- remote.c | 32 +++++++++++--------------------- t/t5510-fetch.sh | 10 +++++++++- 2 files changed, 20 insertions(+), 22 deletions(-) diff --git a/remote.c b/remote.c index 91e3b112b..ff2c80216 100644 --- a/remote.c +++ b/remote.c @@ -867,8 +867,7 @@ static char *guess_ref(const char *name, struct ref *peer) static int match_explicit(struct ref *src, struct ref *dst, struct ref ***dst_tail, - struct refspec *rs, - int errs) + struct refspec *rs) { struct ref *matched_src, *matched_dst; @@ -876,7 +875,7 @@ static int match_explicit(struct ref *src, struct ref *dst, char *dst_guess; if (rs->pattern || rs->matching) - return errs; + return 0; matched_src = matched_dst = NULL; switch (count_refspec_match(rs->src, src, &matched_src)) { @@ -889,23 +888,16 @@ static int match_explicit(struct ref *src, struct ref *dst, */ matched_src = try_explicit_object_name(rs->src); if (!matched_src) - error("src refspec %s does not match any.", rs->src); + return error("src refspec %s does not match any.", rs->src); break; default: - matched_src = NULL; - error("src refspec %s matches more than one.", rs->src); - break; + return error("src refspec %s matches more than one.", rs->src); } - if (!matched_src) - errs = 1; - if (!dst_value) { unsigned char sha1[20]; int flag; - if (!matched_src) - return errs; dst_value = resolve_ref(matched_src->name, sha1, 1, &flag); if (!dst_value || ((flag & REF_ISSYMREF) && @@ -936,18 +928,16 @@ static int match_explicit(struct ref *src, struct ref *dst, dst_value); break; } - if (errs || !matched_dst) - return 1; - if (matched_dst->peer_ref) { - errs = 1; - error("dst ref %s receives from more than one src.", + if (!matched_dst) + return -1; + if (matched_dst->peer_ref) + return error("dst ref %s receives from more than one src.", matched_dst->name); - } else { matched_dst->peer_ref = matched_src; matched_dst->force = rs->force; } - return errs; + return 0; } static int match_explicit_refs(struct ref *src, struct ref *dst, @@ -956,8 +946,8 @@ static int match_explicit_refs(struct ref *src, struct ref *dst, { int i, errs; for (i = errs = 0; i < rs_nr; i++) - errs |= match_explicit(src, dst, dst_tail, &rs[i], errs); - return -errs; + errs += match_explicit(src, dst, dst_tail, &rs[i]); + return errs; } static const struct refspec *check_pattern_match(const struct refspec *rs, diff --git a/t/t5510-fetch.sh b/t/t5510-fetch.sh index 6946557c6..df7750f7d 100755 --- a/t/t5510-fetch.sh +++ b/t/t5510-fetch.sh @@ -37,7 +37,8 @@ test_expect_success "clone and setup child repos" ' echo "Pull: refs/heads/one:refs/heads/one" } >.git/remotes/two && cd .. && - git clone . bundle + git clone . bundle && + git clone . seven ' test_expect_success "fetch test" ' @@ -295,4 +296,11 @@ test_expect_success 'configured fetch updates tracking' ' ) ' +test_expect_success 'pushing nonexistent branch by mistake should not segv' ' + + cd "$D" && + test_must_fail git push seven no:no + +' + test_done -- 2.30.2