Currently 'git cat-file' throws an error while trying to
print the type or size of a broken/corrupt object which is
created using 'git hash-object --literally'. This is
because these objects are usually of unknown types.
Teach git cat-file a '--literally' option where it prints
the type or size of a broken/corrupt object without throwing
an error.
Modify '-t' and '-s' options to call sha1_object_info_extended()
directly to support the '--literally' option.
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Helped-by: Eric Sunshine <sunshine@sunshineco
Signed-off-by: Karthik Nayak <karthik.188@xxxxxxxxx>
---
builtin/cat-file.c | 38 +++++++++++++++++++++++++++++---------
1 file changed, 29 insertions(+), 9 deletions(-)
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index df99df4..91ceae0 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -9,13 +9,20 @@
#include "userdiff.h"
#include "streaming.h"
-static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
+static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
+ int literally)
{
unsigned char sha1[20];
enum object_type type;
char *buf;
unsigned long size;
struct object_context obj_context;
+ struct object_info oi = {NULL};
+ struct strbuf sb = STRBUF_INIT;
+ unsigned flags = LOOKUP_REPLACE_OBJECT;
+
+ if (literally)
+ flags |= LOOKUP_LITERALLY;
if (get_sha1_with_context(obj_name, 0, sha1, &obj_context))
die("Not a valid object name %s", obj_name);
@@ -23,16 +30,24 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
buf = NULL;
switch (opt) {
case 't':
- type = sha1_object_info(sha1, NULL);
- if (type > 0) {
- printf("%s\n", typename(type));
+ oi.typep = &type;
+ oi.typename = &sb;
+ if (sha1_object_info_extended(sha1, &oi, flags) < 0)
+ die("git cat-file: could not get object info");
+ if (type >= 0 && sb.len) {
+ printf("%s\n", sb.buf);
+ strbuf_release(&sb);
return 0;
}
break;
case 's':
- type = sha1_object_info(sha1, &size);
- if (type > 0) {
+ oi.typep = &type;
+ oi.typename = &sb;
+ oi.sizep = &size;
+ if (sha1_object_info_extended(sha1, &oi, flags) < 0)
+ die("git cat-file: could not get object info");
+ if (type >= 0 && sb.len) {
printf("%lu\n", size);
return 0;
}
@@ -323,7 +338,7 @@ static int batch_objects(struct batch_options *opt)
}
static const char * const cat_file_usage[] = {
- N_("git cat-file (-t | -s | -e | -p | <type> | --textconv) <object>"),
+ N_("git cat-file (-t [--literally]|-s [--literally]|-e|-p|<type>|--textconv) <object>"),
N_("git cat-file (--batch | --batch-check) < <list-of-objects>"),
NULL
};
@@ -359,6 +374,7 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
int opt = 0;
const char *exp_type = NULL, *obj_name = NULL;
struct batch_options batch = {0};
+ int literally = 0;
const struct option options[] = {
OPT_GROUP(N_("<type> can be one of: blob, tree, commit, tag")),
@@ -369,6 +385,8 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
OPT_SET_INT('p', NULL, &opt, N_("pretty-print object's content"), 'p'),
OPT_SET_INT(0, "textconv", &opt,
N_("for blob objects, run textconv on object's content"), 'c'),
+ OPT_BOOL( 0, "literally", &literally,
+ N_("get information about corrupt objects for debugging Git")),
{ OPTION_CALLBACK, 0, "batch", &batch, "format",
N_("show info and content of objects fed from the standard input"),
PARSE_OPT_OPTARG, batch_option_callback },
@@ -380,7 +398,7 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
git_config(git_cat_file_config, NULL);
- if (argc != 3 && argc != 2)
+ if (argc < 2 || argc > 4)
usage_with_options(cat_file_usage, options);
argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0);
@@ -405,5 +423,7 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
if (batch.enabled)
return batch_objects(&batch);
- return cat_one_file(opt, exp_type, obj_name);
+ if (literally && opt != 't' && opt != 's')
+ die("git cat-file --literally: use with -s or -t");
+ return cat_one_file(opt, exp_type, obj_name, literally);
}
--
2.3.1.172.g04a1281
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