help: check early if we have a command, if not try a documentation topic

diff --git a/builtin-verify-pack.c b/builtin-verify-pack.c
index 4c515a0570ec2b05e5dca8156d885a70b922251e..222c39e7edc85c8356db7821416574f60316422d 100644 (file)
--- a/builtin-verify-pack.c
+++ b/builtin-verify-pack.c
@@ -2,6 +2,58 @@
 #include "cache.h"
 #include "pack.h"
 
+
+#define MAX_CHAIN 50
+
+static void show_pack_info(struct packed_git *p)
+{
+       uint32_t nr_objects, i, chain_histogram[MAX_CHAIN+1];
+
+       nr_objects = p->num_objects;
+       memset(chain_histogram, 0, sizeof(chain_histogram));
+
+       for (i = 0; i < nr_objects; i++) {
+               const unsigned char *sha1;
+               unsigned char base_sha1[20];
+               const char *type;
+               unsigned long size;
+               unsigned long store_size;
+               off_t offset;
+               unsigned int delta_chain_length;
+
+               sha1 = nth_packed_object_sha1(p, i);
+               if (!sha1)
+                       die("internal error pack-check nth-packed-object");
+               offset = nth_packed_object_offset(p, i);
+               type = packed_object_info_detail(p, offset, &size, &store_size,
+                                                &delta_chain_length,
+                                                base_sha1);
+               printf("%s ", sha1_to_hex(sha1));
+               if (!delta_chain_length)
+                       printf("%-6s %lu %lu %"PRIuMAX"\n",
+                              type, size, store_size, (uintmax_t)offset);
+               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 (delta_chain_length <= MAX_CHAIN)
+                               chain_histogram[delta_chain_length]++;
+                       else
+                               chain_histogram[0]++;
+               }
+       }
+
+       for (i = 0; i <= MAX_CHAIN; i++) {
+               if (!chain_histogram[i])
+                       continue;
+               printf("chain length = %d: %d object%s\n", i,
+                      chain_histogram[i], chain_histogram[i] > 1 ? "s" : "");
+       }
+       if (chain_histogram[0])
+               printf("chain length > %d: %d object%s\n", MAX_CHAIN,
+                      chain_histogram[0], chain_histogram[0] > 1 ? "s" : "");
+}
+
 static int verify_one_pack(const char *path, int verbose)
 {
        char arg[PATH_MAX];
@@ -41,7 +93,16 @@ 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, verbose);
+       err = verify_pack(pack);
+
+       if (verbose) {
+               if (err)
+                       printf("%s: bad\n", pack->pack_name);
+               else {
+                       show_pack_info(pack);
+                       printf("%s: ok\n", pack->pack_name);
+               }
+       }
 
        return err;
 }