Merge branch 'jc/t1512-fix' into maint

* jc/t1512-fix:
get_short_sha1(): correctly disambiguate type-limited abbreviation
t1512: correct leftover constants from earlier edition

diff --git a/sha1_name.c b/sha1_name.c
index b3a90e6f051e8b75458055144829ea72bbe29970..0077dbd50b516c9614573b5c6197fc627802527e 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -241,7 +241,7 @@ static int disambiguate_committish_only(const unsigned char *sha1, void *cb_data
                return 0;
 
        /* We need to do this the hard way... */
-       obj = deref_tag(lookup_object(sha1), NULL, 0);
+       obj = deref_tag(parse_object(sha1), NULL, 0);
        if (obj && obj->type == OBJ_COMMIT)
                return 1;
        return 0;

diff --git a/t/t1512-rev-parse-disambiguation.sh b/t/t1512-rev-parse-disambiguation.sh
index 6b3d797ceabad069aefd1337ffe366b86b523412..5b58e4f6c1645950ace6004d4bd245b169ecb737 100755 (executable)
--- a/t/t1512-rev-parse-disambiguation.sh
+++ b/t/t1512-rev-parse-disambiguation.sh
@@ -77,6 +77,7 @@ test_expect_success 'disambiguate blob' '
 
 test_expect_success 'disambiguate tree' '
        commit=$(echo "d7xm" | git commit-tree 000000000) &&
+       # this commit is fffff2e and not ambiguous with the 00000* objects
        test $(git rev-parse $commit^{tree}) = $(git rev-parse 0000000000cdc)
 '
 
@@ -99,10 +100,14 @@ test_expect_success 'disambiguate commit-ish' '
 
 test_expect_success 'disambiguate commit' '
        commit=$(echo "hoaxj" | git commit-tree 0000000000cdc -p 000000000) &&
+       # this commit is ffffffd8 and not ambiguous with the 00000* objects
        test $(git rev-parse $commit^) = $(git rev-parse 0000000000e4f)
 '
 
 test_expect_success 'log name1..name2 takes only commit-ishes on both ends' '
+       # These are underspecified from the prefix-length point of view
+       # to disambiguate the commit with other objects, but there is only
+       # one commit that has 00000* prefix at this point.
        git log 000000000..000000000 &&
        git log ..000000000 &&
        git log 000000000.. &&
@@ -112,16 +117,19 @@ test_expect_success 'log name1..name2 takes only commit-ishes on both ends' '
 '
 
 test_expect_success 'rev-parse name1..name2 takes only commit-ishes on both ends' '
+       # Likewise.
        git rev-parse 000000000..000000000 &&
        git rev-parse ..000000000 &&
        git rev-parse 000000000..
 '
 
 test_expect_success 'git log takes only commit-ish' '
+       # Likewise.
        git log 000000000
 '
 
 test_expect_success 'git reset takes only commit-ish' '
+       # Likewise.
        git reset 000000000
 '
 
@@ -131,26 +139,30 @@ test_expect_success 'first tag' '
 '
 
 test_expect_failure 'two semi-ambiguous commit-ish' '
+       # At this point, we have a tag 0000000000f8f that points
+       # at a commit 0000000000e4f, and a tree and a blob that
+       # share 0000000000 prefix with these tag and commit.
+       #
        # Once the parser becomes ultra-smart, it could notice that
-       # 110282 before ^{commit} name many different objects, but
+       # 0000000000 before ^{commit} name many different objects, but
        # that only two (HEAD and v1.0.0 tag) can be peeled to commit,
        # and that peeling them down to commit yield the same commit
        # without ambiguity.
-       git rev-parse --verify 110282^{commit} &&
+       git rev-parse --verify 0000000000^{commit} &&
 
        # likewise
-       git log 000000000..000000000 &&
-       git log ..000000000 &&
-       git log 000000000.. &&
-       git log 000000000...000000000 &&
-       git log ...000000000 &&
-       git log 000000000...
+       git log 0000000000..0000000000 &&
+       git log ..0000000000 &&
+       git log 0000000000.. &&
+       git log 0000000000...0000000000 &&
+       git log ...0000000000 &&
+       git log 0000000000...
 '
 
 test_expect_failure 'three semi-ambiguous tree-ish' '
        # Likewise for tree-ish.  HEAD, v1.0.0 and HEAD^{tree} share
        # the prefix but peeling them to tree yields the same thing
-       git rev-parse --verify 000000000^{tree}
+       git rev-parse --verify 0000000000^{tree}
 '
 
 test_expect_success 'parse describe name' '
@@ -241,7 +253,7 @@ test_expect_success 'ambiguous commit-ish' '
        # Now there are many commits that begin with the
        # common prefix, none of these should pick one at
        # random.  They all should result in ambiguity errors.
-       test_must_fail git rev-parse --verify 110282^{commit} &&
+       test_must_fail git rev-parse --verify 00000000^{commit} &&
 
        # likewise
        test_must_fail git log 000000000..000000000 &&