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From: Jeff King <peff@peff.net>
To: git@vger.kernel.org
Cc: Ramkumar Ramachandra <artagnon@gmail.com>,
	Duy Nguyen <pclouds@gmail.com>, Brandon Casey <drafnel@gmail.com>,
	Junio C Hamano <gitster@pobox.com>
Subject: [PATCH 05/10] cat-file: refactor --batch option parsing
Date: Wed, 10 Jul 2013 07:38:58 -0400	[thread overview]
Message-ID: <20130710113858.GE21963@sigill.intra.peff.net> (raw)
In-Reply-To: <20130710113447.GA20113@sigill.intra.peff.net>

We currently use an int to tell us whether --batch parsing
is on, and if so, whether we should print the full object
contents. Let's instead factor this into a struct, filled in
by callback, which will make further batch-related options
easy to add.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/cat-file.c | 56 ++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 38 insertions(+), 18 deletions(-)

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 70dd8c8..5254fe8 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -13,9 +13,6 @@
 #include "userdiff.h"
 #include "streaming.h"
 
-#define BATCH 1
-#define BATCH_CHECK 2
-
 static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
 {
 	unsigned char sha1[20];
@@ -142,7 +139,12 @@ static void print_object_or_die(int fd, const unsigned char *sha1,
 	}
 }
 
-static int batch_one_object(const char *obj_name, int print_contents)
+struct batch_options {
+	int enabled;
+	int print_contents;
+};
+
+static int batch_one_object(const char *obj_name, struct batch_options *opt)
 {
 	unsigned char sha1[20];
 	enum object_type type = 0;
@@ -167,19 +169,19 @@ static int batch_objects(int print_contents)
 	printf("%s %s %lu\n", sha1_to_hex(sha1), typename(type), size);
 	fflush(stdout);
 
-	if (print_contents == BATCH) {
+	if (opt->print_contents) {
 		print_object_or_die(1, sha1, type, size);
 		write_or_die(1, "\n", 1);
 	}
 	return 0;
 }
 
-static int batch_objects(int print_contents)
+static int batch_objects(struct batch_options *opt)
 {
 	struct strbuf buf = STRBUF_INIT;
 
 	while (strbuf_getline(&buf, stdin, '\n') != EOF) {
-		int error = batch_one_object(buf.buf, print_contents);
+		int error = batch_one_object(buf.buf, opt);
 		if (error)
 			return error;
 	}
@@ -201,10 +203,28 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
 	return git_default_config(var, value, cb);
 }
 
+static int batch_option_callback(const struct option *opt,
+				 const char *arg,
+				 int unset)
+{
+	struct batch_options *bo = opt->value;
+
+	if (unset) {
+		memset(bo, 0, sizeof(*bo));
+		return 0;
+	}
+
+	bo->enabled = 1;
+	bo->print_contents = !strcmp(opt->long_name, "batch");
+
+	return 0;
+}
+
 int cmd_cat_file(int argc, const char **argv, const char *prefix)
 {
-	int opt = 0, batch = 0;
+	int opt = 0;
 	const char *exp_type = NULL, *obj_name = NULL;
+	struct batch_options batch = {0};
 
 	const struct option options[] = {
 		OPT_GROUP(N_("<type> can be one of: blob, tree, commit, tag")),
@@ -215,12 +235,12 @@ 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_SET_INT(0, "batch", &batch,
-			    N_("show info and content of objects fed from the standard input"),
-			    BATCH),
-		OPT_SET_INT(0, "batch-check", &batch,
-			    N_("show info about objects fed from the standard input"),
-			    BATCH_CHECK),
+		{ OPTION_CALLBACK, 0, "batch", &batch, NULL,
+			N_("show info and content of objects fed from the standard input"),
+			PARSE_OPT_NOARG, batch_option_callback },
+		{ OPTION_CALLBACK, 0, "batch-check", &batch, NULL,
+			N_("show info about objects fed from the standard input"),
+			PARSE_OPT_NOARG, batch_option_callback },
 		OPT_END()
 	};
 
@@ -237,19 +257,19 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
 		else
 			usage_with_options(cat_file_usage, options);
 	}
-	if (!opt && !batch) {
+	if (!opt && !batch.enabled) {
 		if (argc == 2) {
 			exp_type = argv[0];
 			obj_name = argv[1];
 		} else
 			usage_with_options(cat_file_usage, options);
 	}
-	if (batch && (opt || argc)) {
+	if (batch.enabled && (opt || argc)) {
 		usage_with_options(cat_file_usage, options);
 	}
 
-	if (batch)
-		return batch_objects(batch);
+	if (batch.enabled)
+		return batch_objects(&batch);
 
 	return cat_one_file(opt, exp_type, obj_name);
 }
-- 
1.8.3.rc3.24.gec82cb9

  parent reply	other threads:[~2013-07-10 11:39 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-07 10:01 [RFC/PATCH 0/4] cat-file --batch-disk-sizes Jeff King
2013-07-07 10:03 ` [PATCH 1/4] zero-initialize object_info structs Jeff King
2013-07-07 17:34   ` Junio C Hamano
2013-07-07 10:04 ` [PATCH 2/4] teach sha1_object_info_extended a "disk_size" query Jeff King
2013-07-07 10:09 ` [PATCH 3/4] cat-file: add --batch-disk-sizes option Jeff King
2013-07-07 17:49   ` Junio C Hamano
2013-07-07 18:19     ` Jeff King
2013-07-08 11:04     ` Duy Nguyen
2013-07-08 12:00       ` Ramkumar Ramachandra
2013-07-08 13:13         ` Duy Nguyen
2013-07-08 13:37           ` Ramkumar Ramachandra
2013-07-09  2:55             ` Duy Nguyen
2013-07-09 10:32               ` Ramkumar Ramachandra
2013-07-10 11:16             ` Jeff King
2013-07-08 16:40           ` Junio C Hamano
2013-07-10 11:04     ` Jeff King
2013-07-11 16:35       ` Junio C Hamano
2013-07-07 21:15   ` brian m. carlson
2013-07-10 10:57     ` Jeff King
2013-07-07 10:14 ` [PATCH 4/4] pack-revindex: radix-sort the revindex Jeff King
2013-07-07 23:52   ` Shawn Pearce
2013-07-08  7:57     ` Jeff King
2013-07-08 15:38       ` Shawn Pearce
2013-07-08 20:50   ` Brandon Casey
2013-07-08 21:35     ` Brandon Casey
2013-07-10 10:57       ` Jeff King
2013-07-10 10:52     ` Jeff King
2013-07-10 11:34 ` [PATCHv2 00/10] cat-file formats/on-disk sizes Jeff King
2013-07-10 11:35   ` [PATCH 01/10] zero-initialize object_info structs Jeff King
2013-07-10 11:35   ` [PATCH 02/10] teach sha1_object_info_extended a "disk_size" query Jeff King
2013-07-10 11:36   ` [PATCH 03/10] t1006: modernize output comparisons Jeff King
2013-07-10 11:38   ` [PATCH 04/10] cat-file: teach --batch to stream blob objects Jeff King
2013-07-10 11:38   ` Jeff King [this message]
2013-07-10 11:45   ` [PATCH 06/10] cat-file: add --batch-check=<format> Jeff King
2013-07-10 11:57     ` Eric Sunshine
2013-07-10 14:51     ` Ramkumar Ramachandra
2013-07-11 11:24       ` Jeff King
2013-07-10 11:46   ` [PATCH 07/10] cat-file: add %(objectsize:disk) format atom Jeff King
2013-07-10 11:48   ` [PATCH 08/10] cat-file: split --batch input lines on whitespace Jeff King
2013-07-10 15:29     ` Ramkumar Ramachandra
2013-07-11 11:36       ` Jeff King
2013-07-11 17:42         ` Junio C Hamano
2013-07-11 20:45         ` [PATCHv3 " Jeff King
2013-07-10 11:50   ` [PATCH 09/10] pack-revindex: use unsigned to store number of objects Jeff King
2013-07-10 11:55   ` [PATCH 10/10] pack-revindex: radix-sort the revindex Jeff King
2013-07-10 12:00     ` Jeff King
2013-07-10 13:17     ` Ramkumar Ramachandra
2013-07-11 11:03       ` Jeff King
2013-07-10 17:10     ` Brandon Casey
2013-07-11 11:17       ` Jeff King
2013-07-11 12:16     ` [PATCHv3 " Jeff King
2013-07-11 21:12       ` Brandon Casey

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