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Merge branch 'jh/diff-index-line-abbrev'
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* jh/diff-index-line-abbrev:
  diff.c: Ensure "index $from..$to" line contains unambiguous SHA1s

Conflicts:
	diff.c
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Junio C Hamano committed Jun 18, 2010
2 parents ecdb3ec + 3e5a188 commit 18fd805
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Showing 2 changed files with 38 additions and 3 deletions.
6 changes: 3 additions & 3 deletions diff.c
Original file line number Diff line number Diff line change
Expand Up @@ -2430,9 +2430,9 @@ static void fill_metainfo(struct strbuf *msg,
(!fill_mmfile(&mf, two) && diff_filespec_is_binary(two)))
abbrev = 40;
}
strbuf_addf(msg, "%sindex %.*s..%.*s", set,
abbrev, sha1_to_hex(one->sha1),
abbrev, sha1_to_hex(two->sha1));
strbuf_addf(msg, "%sindex %s..", set,
find_unique_abbrev(one->sha1, abbrev));
strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev));
if (one->mode == two->mode)
strbuf_addf(msg, " %06o", one->mode);
strbuf_addf(msg, "%s\n", reset);
Expand Down
35 changes: 35 additions & 0 deletions t/t4044-diff-index-unique-abbrev.sh
Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
#!/bin/sh

test_description='test unique sha1 abbreviation on "index from..to" line'
. ./test-lib.sh

cat >expect_initial <<EOF
100644 blob 51d2738463ea4ca66f8691c91e33ce64b7d41bb1 foo
EOF

cat >expect_update <<EOF
100644 blob 51d2738efb4ad8a1e40bed839ab8e116f0a15e47 foo
EOF

test_expect_success 'setup' '
echo 4827 > foo &&
git add foo &&
git commit -m "initial" &&
git cat-file -p HEAD: > actual &&
test_cmp expect_initial actual &&
echo 11742 > foo &&
git commit -a -m "update" &&
git cat-file -p HEAD: > actual &&
test_cmp expect_update actual
'

cat >expect <<EOF
index 51d27384..51d2738e 100644
EOF

test_expect_success 'diff does not produce ambiguous index line' '
git diff HEAD^..HEAD | grep index > actual &&
test_cmp expect actual
'

test_done

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