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cat-file: use GET_OID_ONLY_TO_DIE in --(textconv|filters)

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Change the cat_one_file() logic that calls get_oid_with_context()
under --textconv and --filters to use the GET_OID_ONLY_TO_DIE flag,
thus improving the error messaging emitted when e.g. <path> is missing
but <rev> is not.

To service the "cat-file" use-case we need to introduce a new
"GET_OID_REQUIRE_PATH" flag, otherwise it would exit early as soon as
a valid "HEAD" was resolved, but in the "cat-file" case being changed
we always need a valid revision and path.

This arguably makes the "<bad rev>:<bad path>" and "<bad
rev>:<good (in HEAD) path>" use cases worse, as we won't quote the
<path> component at the user anymore, but let's just use the existing
logic "git log" et al use for now. We can improve the messaging for
those cases as a follow-up for all callers.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2021-12-28 14:28:50 +01:00 committed by Junio C Hamano
parent 9ce6000cb7
commit 245b948815
4 changed files with 14 additions and 14 deletions
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16
builtin/cat-file.c
View file

@ -73,14 +73,17 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
struct object_info oi = OBJECT_INFO_INIT;
struct strbuf sb = STRBUF_INIT;
unsigned flags = OBJECT_INFO_LOOKUP_REPLACE;
unsigned get_oid_flags = GET_OID_RECORD_PATH | GET_OID_ONLY_TO_DIE;
const char *path = force_path;
const int opt_cw = (opt == 'c' || opt == 'w');
if (!path && opt_cw)
get_oid_flags |= GET_OID_REQUIRE_PATH;
if (unknown_type)
flags |= OBJECT_INFO_ALLOW_UNKNOWN_TYPE;
if (get_oid_with_context(the_repository, obj_name,
GET_OID_RECORD_PATH,
&oid, &obj_context))
if (get_oid_with_context(the_repository, obj_name, get_oid_flags, &oid,
&obj_context))
die("Not a valid object name %s", obj_name);
if (!path)
@ -112,9 +115,6 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
return !has_object_file(&oid);
case 'w':
if (!path)
die("git cat-file --filters %s: <object> must be "
"<sha1:path>", obj_name);
if (filter_object(path, obj_context.mode,
&oid, &buf, &size))
@ -122,10 +122,6 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
break;
case 'c':
if (!path)
die("git cat-file --textconv %s: <object> must be <sha1:path>",
obj_name);
if (textconv_object(the_repository, path, obj_context.mode,
&oid, 1, &buf, &size))
break;

1
cache.h
View file

@ -1366,6 +1366,7 @@ struct object_context {
#define GET_OID_FOLLOW_SYMLINKS 0100
#define GET_OID_RECORD_PATH 0200
#define GET_OID_ONLY_TO_DIE 04000
#define GET_OID_REQUIRE_PATH 010000
#define GET_OID_DISAMBIGUATORS \
(GET_OID_COMMIT | GET_OID_COMMITTISH | \

3
object-name.c
View file

@ -1799,6 +1799,9 @@ static enum get_oid_result get_oid_with_context_1(struct repository *repo,
oc->mode = S_IFINVALID;
strbuf_init(&oc->symlink_path, 0);
ret = get_oid_1(repo, name, namelen, oid, flags);
if (!ret && flags & GET_OID_REQUIRE_PATH)
die(_("<object>:<path> required, only <object> '%s' given"),
name);
if (!ret)
return ret;
/*

8
t/t8007-cat-file-textconv.sh
View file

@ -29,7 +29,7 @@ test_expect_success 'usage: <bad rev>' '
test_expect_success 'usage: <bad rev>:<bad path>' '
cat >expect <<-\EOF &&
fatal: Not a valid object name HEAD2:two.bin
fatal: invalid object name '\''HEAD2'\''.
EOF
test_must_fail git cat-file --textconv HEAD2:two.bin 2>actual &&
test_cmp expect actual
@ -37,7 +37,7 @@ test_expect_success 'usage: <bad rev>:<bad path>' '
test_expect_success 'usage: <rev>:<bad path>' '
cat >expect <<-\EOF &&
fatal: Not a valid object name HEAD:two.bin
fatal: path '\''two.bin'\'' does not exist in '\''HEAD'\''
EOF
test_must_fail git cat-file --textconv HEAD:two.bin 2>actual &&
test_cmp expect actual
@ -46,7 +46,7 @@ test_expect_success 'usage: <rev>:<bad path>' '
test_expect_success 'usage: <rev> with no <path>' '
cat >expect <<-\EOF &&
fatal: git cat-file --textconv HEAD: <object> must be <sha1:path>
fatal: <object>:<path> required, only <object> '\''HEAD'\'' given
EOF
test_must_fail git cat-file --textconv HEAD 2>actual &&
test_cmp expect actual
@ -55,7 +55,7 @@ test_expect_success 'usage: <rev> with no <path>' '
test_expect_success 'usage: <bad rev>:<good (in HEAD) path>' '
cat >expect <<-\EOF &&
fatal: Not a valid object name HEAD2:one.bin
fatal: invalid object name '\''HEAD2'\''.
EOF
test_must_fail git cat-file --textconv HEAD2:one.bin 2>actual &&
test_cmp expect actual