builtin/multi-pack-index.c: make '--progress' a common option

All multi-pack-index sub-commands (write, verify, repack, and expire)
support a '--progress' command-line option, despite not listing it as
one of the common options in `common_opts`.

As a result each sub-command declares its own `OPT_BIT()` for a
"--progress" command-line option. Centralize this within the
`common_opts` to avoid re-declaring it in each sub-command.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: ttaylorr

Documentation/git-multi-pack-index.adoc

@@ -18,6 +18,8 @@ Write or verify a multi-pack-index (MIDX) file.
 OPTIONS
 -------
 
+The following command-line options are applicable to all sub-commands:
+
 --object-dir=<dir>::
 	Use given directory for the location of Git objects. We check
 	`<dir>/packs/multi-pack-index` for the current MIDX file, and

builtin/multi-pack-index.c

@@ -84,6 +84,8 @@ static struct option common_opts[] = {
 	  N_("directory"),
 	  N_("object directory containing set of packfile and pack-index pairs"),
 	  parse_object_dir),
+	OPT_BIT(0, "progress", &opts.flags, N_("force progress reporting"),
+		MIDX_PROGRESS),
 	OPT_END(),
 };
 
@@ -138,8 +140,6 @@ static int cmd_multi_pack_index_write(int argc, const char **argv,
 			   N_("pack for reuse when computing a multi-pack bitmap")),
 		OPT_BIT(0, "bitmap", &opts.flags, N_("write multi-pack bitmap"),
 			MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX),
-		OPT_BIT(0, "progress", &opts.flags,
-			N_("force progress reporting"), MIDX_PROGRESS),
 		OPT_BIT(0, "incremental", &opts.flags,
 			N_("write a new incremental MIDX"), MIDX_WRITE_INCREMENTAL),
 		OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
@@ -200,8 +200,6 @@ static int cmd_multi_pack_index_verify(int argc, const char **argv,
 {
 	struct option *options;
 	static struct option builtin_multi_pack_index_verify_options[] = {
-		OPT_BIT(0, "progress", &opts.flags,
-			N_("force progress reporting"), MIDX_PROGRESS),
 		OPT_END(),
 	};
 	struct odb_source *source;
@@ -231,8 +229,6 @@ static int cmd_multi_pack_index_expire(int argc, const char **argv,
 {
 	struct option *options;
 	static struct option builtin_multi_pack_index_expire_options[] = {
-		OPT_BIT(0, "progress", &opts.flags,
-			N_("force progress reporting"), MIDX_PROGRESS),
 		OPT_END(),
 	};
 	struct odb_source *source;
@@ -264,8 +260,6 @@ static int cmd_multi_pack_index_repack(int argc, const char **argv,
 	static struct option builtin_multi_pack_index_repack_options[] = {
 		OPT_UNSIGNED(0, "batch-size", &opts.batch_size,
 		  N_("during repack, collect pack-files of smaller size into a batch that is larger than this size")),
-		OPT_BIT(0, "progress", &opts.flags,
-		  N_("force progress reporting"), MIDX_PROGRESS),
 		OPT_END(),
 	};
 	struct odb_source *source;