verify-pack --stat-only: show histogram without verifying

When this option is given, the command does not verify the pack contents,
but shows the delta chain histogram.  If used with --verbose, the usual
list of objects is also shown.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-verify-pack.txt b/Documentation/git-verify-pack.txt
index d791a80819b39b5c3b07ace9d30f16c63f56fd2e..97f7f9165eca2311e4806e9cab8ef18c8c94f7d5 100644 (file)
--- a/Documentation/git-verify-pack.txt
+++ b/Documentation/git-verify-pack.txt
@@ -25,7 +25,13 @@ OPTIONS
 -v::
 --verbose::
        After verifying the pack, show list of objects contained
-       in the pack.
+       in the pack and a histogram of delta chain length.
+
+-s::
+--stat-only::
+       Do not verify the pack contents; only show the histogram of delta
+       chain length.  With `--verbose`, list of objects is also shown.
+
 \--::
        Do not interpret any more arguments as options.
 

diff --git a/builtin-verify-pack.c b/builtin-verify-pack.c
index b5bd28e9598ab63696f241511f3a9cc032dbed60..b6079ae6cb03c7f3112c6eebc8c9a012d690a125 100644 (file)
--- a/builtin-verify-pack.c
+++ b/builtin-verify-pack.c
@@ -6,10 +6,14 @@
 
 #define MAX_CHAIN 50
 
-static void show_pack_info(struct packed_git *p)
+#define VERIFY_PACK_VERBOSE 01
+#define VERIFY_PACK_STAT_ONLY 02
+
+static void show_pack_info(struct packed_git *p, unsigned int flags)
 {
        uint32_t nr_objects, i;
        int cnt;
+       int stat_only = flags & VERIFY_PACK_STAT_ONLY;
        unsigned long chain_histogram[MAX_CHAIN+1], baseobjects;
 
        nr_objects = p->num_objects;
@@ -32,16 +36,19 @@ static void show_pack_info(struct packed_git *p)
                type = packed_object_info_detail(p, offset, &size, &store_size,
                                                 &delta_chain_length,
                                                 base_sha1);
-               printf("%s ", sha1_to_hex(sha1));
+               if (!stat_only)
+                       printf("%s ", sha1_to_hex(sha1));
                if (!delta_chain_length) {
-                       printf("%-6s %lu %lu %"PRIuMAX"\n",
-                              type, size, store_size, (uintmax_t)offset);
+                       if (!stat_only)
+                               printf("%-6s %lu %lu %"PRIuMAX"\n",
+                                      type, size, store_size, (uintmax_t)offset);
                        baseobjects++;
                }
                else {
-                       printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
-                              type, size, store_size, (uintmax_t)offset,
-                              delta_chain_length, sha1_to_hex(base_sha1));
+                       if (!stat_only)
+                               printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
+                                      type, size, store_size, (uintmax_t)offset,
+                                      delta_chain_length, sha1_to_hex(base_sha1));
                        if (delta_chain_length <= MAX_CHAIN)
                                chain_histogram[delta_chain_length]++;
                        else
@@ -66,10 +73,12 @@ static void show_pack_info(struct packed_git *p)
                       chain_histogram[0] > 1 ? "s" : "");
 }
 
-static int verify_one_pack(const char *path, int verbose)
+static int verify_one_pack(const char *path, unsigned int flags)
 {
        char arg[PATH_MAX];
        int len;
+       int verbose = flags & VERIFY_PACK_VERBOSE;
+       int stat_only = flags & VERIFY_PACK_STAT_ONLY;
        struct packed_git *pack;
        int err;
 
@@ -105,14 +114,19 @@ static int verify_one_pack(const char *path, int verbose)
                return error("packfile %s not found.", arg);
 
        install_packed_git(pack);
-       err = verify_pack(pack);
 
-       if (verbose) {
+       if (!stat_only)
+               err = verify_pack(pack);
+       else
+               err = open_pack_index(pack);
+
+       if (verbose || stat_only) {
                if (err)
                        printf("%s: bad\n", pack->pack_name);
                else {
-                       show_pack_info(pack);
-                       printf("%s: ok\n", pack->pack_name);
+                       show_pack_info(pack, flags);
+                       if (!stat_only)
+                               printf("%s: ok\n", pack->pack_name);
                }
        }
 
@@ -120,17 +134,20 @@ static int verify_one_pack(const char *path, int verbose)
 }
 
 static const char * const verify_pack_usage[] = {
-       "git verify-pack [-v|--verbose] <pack>...",
+       "git verify-pack [-v|--verbose] [-s|--stat-only] <pack>...",
        NULL
 };
 
 int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 {
        int err = 0;
-       int verbose = 0;
+       unsigned int flags = 0;
        int i;
        const struct option verify_pack_options[] = {
-               OPT__VERBOSE(&verbose),
+               OPT_BIT('v', "verbose", &flags, "verbose",
+                       VERIFY_PACK_VERBOSE),
+               OPT_BIT('s', "stat-only", &flags, "show statistics only",
+                       VERIFY_PACK_STAT_ONLY),
                OPT_END()
        };
 
@@ -140,7 +157,7 @@ int cmd_verify_pack(int argc, const char **argv, const char *prefix)
        if (argc < 1)
                usage_with_options(verify_pack_usage, verify_pack_options);
        for (i = 0; i < argc; i++) {
-               if (verify_one_pack(argv[i], verbose))
+               if (verify_one_pack(argv[i], flags))
                        err = 1;
                discard_revindex();
        }