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merge: fix incorrect merge message for ambiguous tag/branch
If we have both a tag and a branch named "foo", then calling "git merge foo" will warn about the ambiguous ref, but merge the tag. When generating the commit message, though, we simply checked whether "refs/heads/foo" existed, and if it did, assumed it was a branch. This led to the statement "Merge branch 'foo'" in the commit message, which is quite wrong. Instead, we should use dwim_ref to find the actual ref used, and describe it appropriately. In addition to the test in t7608, we must also tweak the expected output of t4202, which was accidentally triggering this bug. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -358,6 +358,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
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struct strbuf buf = STRBUF_INIT;
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struct strbuf bname = STRBUF_INIT;
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const char *ptr;
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char *found_ref;
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int len, early;
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strbuf_branchname(&bname, remote);
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@ -368,14 +369,12 @@ static void merge_name(const char *remote, struct strbuf *msg)
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if (!remote_head)
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die("'%s' does not point to a commit", remote);
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strbuf_addstr(&buf, "refs/heads/");
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strbuf_addstr(&buf, remote);
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resolve_ref(buf.buf, branch_head, 0, NULL);
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if (!hashcmp(remote_head->sha1, branch_head)) {
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strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
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sha1_to_hex(branch_head), remote);
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goto cleanup;
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if (dwim_ref(remote, strlen(remote), branch_head, &found_ref) > 0) {
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if (!prefixcmp(found_ref, "refs/heads/")) {
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strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
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sha1_to_hex(branch_head), remote);
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goto cleanup;
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}
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}
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/* See if remote matches <name>^^^.. or <name>~<number> */
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@ -320,11 +320,11 @@ test_expect_success 'set up more tangled history' '
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'
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cat > expect <<\EOF
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* Merge branch 'reach'
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* Merge commit 'reach'
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| \
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| \
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*-. \ Merge branches 'octopus-a' and 'octopus-b'
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*-. \ Merge commit 'octopus-a'; commit 'octopus-b'
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|\ \ \
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* | | | seventh
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| | * | octopus-b
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@ -38,7 +38,7 @@ test_expect_success 'merge tag' '
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check_oneline "Merge commit Qtag-1Q"
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'
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test_expect_failure 'ambiguous tag' '
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test_expect_success 'ambiguous tag' '
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git checkout -b ambiguous master &&
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test_commit ambiguous &&
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git checkout master &&
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