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A few more options for git-cat-file

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This adds '-e' option to git-cat-file, to test for the existence
of the object.

This also cleans up the option-parsing in git-cat-file slightly.

[jc: HPA version had -n option which did rev-parse --verify; the
real value of this patch is the option parsing cleanup.]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
H. Peter Anvin 2005-12-03 17:57:48 -08:00 committed by Junio C Hamano
parent e40b61fb6b
commit 7950571ad7
2 changed files with 41 additions and 17 deletions
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13
Documentation/git-cat-file.txt
View file

@ -8,7 +8,7 @@ git-cat-file - Provide content or type information for repository objects
SYNOPSIS
--------
'git-cat-file' (-t | -s | <type>) <object>
'git-cat-file' (-t | -s | -e | <type>) <object>
DESCRIPTION
-----------
@ -29,6 +29,10 @@ OPTIONS
Instead of the content, show the object size identified by
<object>.
-e::
Suppress all output; instead exit with zero status if <object>
exists and is a valid object.
<type>::
Typically this matches the real type of <object> but asking
for a type that can trivially be dereferenced from the given
@ -39,8 +43,11 @@ OPTIONS
OUTPUT
------
If '-t' is specified, one of the <type>. If '-s' is specified,
the size of the <object> in bytes.
If '-t' is specified, one of the <type>.
If '-s' is specified, the size of the <object> in bytes.
If '-e' is specified, no output.
Otherwise the raw (though uncompressed) contents of the <object> will
be returned.

45
cat-file.c
View file

@ -11,27 +11,44 @@ int main(int argc, char **argv)
char type[20];
void *buf;
unsigned long size;
int opt;
setup_git_directory();
if (argc != 3 || get_sha1(argv[2], sha1))
usage("git-cat-file [-t | -s | <type>] <sha1>");
usage("git-cat-file [-t|-s|-e|<type>] <sha1>");
if (!strcmp("-t", argv[1]) || !strcmp("-s", argv[1])) {
if (!sha1_object_info(sha1, type,
argv[1][1] == 's' ? &size : NULL)) {
switch (argv[1][1]) {
case 't':
printf("%s\n", type);
break;
case 's':
printf("%lu\n", size);
break;
}
opt = 0;
if ( argv[1][0] == '-' ) {
opt = argv[1][1];
if ( !opt || argv[1][2] )
opt = -1; /* Not a single character option */
}
buf = NULL;
switch (opt) {
case 't':
if (!sha1_object_info(sha1, type, NULL)) {
printf("%s\n", type);
return 0;
}
buf = NULL;
} else {
break;
case 's':
if (!sha1_object_info(sha1, type, &size)) {
printf("%lu\n", size);
return 0;
}
break;
case 'e':
return !has_sha1_file(sha1);
case 0:
buf = read_object_with_reference(sha1, argv[1], &size, NULL);
break;
default:
die("git-cat-file: unknown option: %s\n", argv[1]);
}
if (!buf)