From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karthik Nayak Subject: [PATCH v7 2/4] cat-file: teach cat-file a '--literally' option Date: Sat, 4 Apr 2015 11:14:04 +0530 Message-ID: <1428126244-19115-1-git-send-email-karthik.188@gmail.com> References: <551F7984.5070902@gmail.com> Cc: gitster@pobox.com, sunshine@sunshineco.com, Karthik Nayak To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Sat Apr 04 07:44:26 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YeGsZ-0007Rf-PD for gcvg-git-2@plane.gmane.org; Sat, 04 Apr 2015 07:44:24 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752029AbbDDFoT (ORCPT ); Sat, 4 Apr 2015 01:44:19 -0400 Received: from mail-pd0-f178.google.com ([209.85.192.178]:34698 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751977AbbDDFoS (ORCPT ); Sat, 4 Apr 2015 01:44:18 -0400 Received: by pdbni2 with SMTP id ni2so143046545pdb.1 for ; Fri, 03 Apr 2015 22:44:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=cpPK41Dp7zcOfZ87nRjaA1bIlV2TBDaDsBDiD0LedRc=; b=RHTcDpIcGfj6l5F69rdujvRKc9E0bq8HAgFCVHPXNY9nPyDZrM4AmgWuvJnJnPj+lN z+KZT6piUnchxLTEk+9dYUdpV6wiaDTMqw9zsu56dYHt91k0VIaFGPMvatIJG1ejq5Mp dvP2firSLthaJplvrtU97UrEULG1fkK7MfEMvlo2GSe0ITW3bnk68h9AkXTeKldtY3e3 dqbBiSB7HkPou9r6Kxomsc48eLkReH/934vM5bjzv80+9CC+dN7pLI+GnqmAoiZ0ottx +u+jJrKonlQiKbn89v71o9zaoeOX16sw81aJyFn6qVE1UDR+VmD0/MRcZBNyjIgwFpK4 ok9w== X-Received: by 10.66.172.164 with SMTP id bd4mr9550600pac.145.1428126258018; Fri, 03 Apr 2015 22:44:18 -0700 (PDT) Received: from ashley.localdomain ([103.227.98.178]) by mx.google.com with ESMTPSA id qp13sm578881pdb.31.2015.04.03.22.44.15 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 03 Apr 2015 22:44:17 -0700 (PDT) X-Mailer: git-send-email 2.4.0.rc1.249.g9f2ee54 In-Reply-To: <551F7984.5070902@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: 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 Helped-by: Eric Sunshine Signed-off-by: Karthik Nayak --- 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 | | --textconv) "), + N_("git cat-file (-t [--literally]|-s [--literally]|-e|-p||--textconv) "), N_("git cat-file (--batch | --batch-check) < "), 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_(" 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); } -- 2.4.0.rc1.249.g9f2ee54