diff options
| -rw-r--r-- | builtin/for-each-ref.c | 5 | ||||
| -rw-r--r-- | refs.c | 29 | ||||
| -rwxr-xr-x | t/t6301-for-each-ref-errors.sh | 56 |
3 files changed, 83 insertions, 7 deletions
diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c index 83f9cf916..13d217240 100644 --- a/builtin/for-each-ref.c +++ b/builtin/for-each-ref.c @@ -851,6 +851,11 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f return 0; } + if (flag & REF_ISBROKEN) { + warning("ignoring broken ref %s", refname); + return 0; + } + if (*cb->grab_pattern) { const char **pattern; int namelen = strlen(refname); @@ -1374,19 +1374,34 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir) create_dir_entry(refs, refname.buf, refname.len, 1)); } else { + int read_ok; + if (*refs->name) { hashclr(sha1); flag = 0; - if (resolve_gitlink_ref(refs->name, refname.buf, sha1) < 0) { - hashclr(sha1); - flag |= REF_ISBROKEN; - } - } else if (read_ref_full(refname.buf, - RESOLVE_REF_READING, - sha1, &flag)) { + read_ok = !resolve_gitlink_ref(refs->name, + refname.buf, sha1); + } else { + read_ok = !read_ref_full(refname.buf, + RESOLVE_REF_READING, + sha1, &flag); + } + + if (!read_ok) { hashclr(sha1); flag |= REF_ISBROKEN; + } else if (is_null_sha1(sha1)) { + /* + * It is so astronomically unlikely + * that NULL_SHA1 is the SHA-1 of an + * actual object that we consider its + * appearance in a loose reference + * file to be repo corruption + * (probably due to a software bug). + */ + flag |= REF_ISBROKEN; } + if (check_refname_format(refname.buf, REFNAME_ALLOW_ONELEVEL)) { hashclr(sha1); diff --git a/t/t6301-for-each-ref-errors.sh b/t/t6301-for-each-ref-errors.sh new file mode 100755 index 000000000..cdb67a03b --- /dev/null +++ b/t/t6301-for-each-ref-errors.sh @@ -0,0 +1,56 @@ +#!/bin/sh + +test_description='for-each-ref errors for broken refs' + +. ./test-lib.sh + +ZEROS=$_z40 +MISSING=abababababababababababababababababababab + +test_expect_success setup ' + git commit --allow-empty -m "Initial" && + git tag testtag && + git for-each-ref >full-list && + git for-each-ref --format="%(objectname) %(refname)" >brief-list +' + +test_expect_success 'Broken refs are reported correctly' ' + r=refs/heads/bogus && + : >.git/$r && + test_when_finished "rm -f .git/$r" && + echo "warning: ignoring broken ref $r" >broken-err && + git for-each-ref >out 2>err && + test_cmp full-list out && + test_cmp broken-err err +' + +test_expect_success 'NULL_SHA1 refs are reported correctly' ' + r=refs/heads/zeros && + echo $ZEROS >.git/$r && + test_when_finished "rm -f .git/$r" && + echo "warning: ignoring broken ref $r" >zeros-err && + git for-each-ref >out 2>err && + test_cmp full-list out && + test_cmp zeros-err err && + git for-each-ref --format="%(objectname) %(refname)" >brief-out 2>brief-err && + test_cmp brief-list brief-out && + test_cmp zeros-err brief-err +' + +test_expect_success 'Missing objects are reported correctly' ' + r=refs/heads/missing && + echo $MISSING >.git/$r && + test_when_finished "rm -f .git/$r" && + echo "fatal: missing object $MISSING for $r" >missing-err && + test_must_fail git for-each-ref 2>err && + test_cmp missing-err err && + ( + cat brief-list && + echo "$MISSING $r" + ) | sort -k 2 >missing-brief-expected && + git for-each-ref --format="%(objectname) %(refname)" >brief-out 2>brief-err && + test_cmp missing-brief-expected brief-out && + test_must_be_empty brief-err +' + +test_done |