builtin-replace.c

   1 /*
   2  * Builtin "git replace"
   3  *
   4  * Copyright (c) 2008 Christian Couder <chriscool@tuxfamily.org>
   5  *
   6  * Based on builtin-tag.c by Kristian Høgsberg <krh@redhat.com>
   7  * and Carlos Rica <jasampler@gmail.com> that was itself based on
   8  * git-tag.sh and mktag.c by Linus Torvalds.
   9  */
  10
  11 #include "cache.h"
  12 #include "builtin.h"
  13 #include "refs.h"
  14 #include "parse-options.h"
  15
  16 static const char * const git_replace_usage[] = {
  17         "git replace -d <object>...",
  18         "git replace -l [<pattern>]",
  19         NULL
  20 };
  21
  22 static int show_reference(const char *refname, const unsigned char *sha1,
  23                           int flag, void *cb_data)
  24 {
  25         const char *pattern = cb_data;
  26
  27         if (!fnmatch(pattern, refname, 0))
  28                 printf("%s\n", refname);
  29
  30         return 0;
  31 }
  32
  33 static int list_replace_refs(const char *pattern)
  34 {
  35         if (pattern == NULL)
  36                 pattern = "*";
  37
  38         for_each_replace_ref(show_reference, (void *) pattern);
  39
  40         return 0;
  41 }
  42
  43 typedef int (*each_replace_name_fn)(const char *name, const char *ref,
  44                                     const unsigned char *sha1);
  45
  46 static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
  47 {
  48         const char **p;
  49         char ref[PATH_MAX];
  50         int had_error = 0;
  51         unsigned char sha1[20];
  52
  53         for (p = argv; *p; p++) {
  54                 if (snprintf(ref, sizeof(ref), "refs/replace/%s", *p)
  55                                         >= sizeof(ref)) {
  56                         error("replace ref name too long: %.*s...", 50, *p);
  57                         had_error = 1;
  58                         continue;
  59                 }
  60                 if (!resolve_ref(ref, sha1, 1, NULL)) {
  61                         error("replace ref '%s' not found.", *p);
  62                         had_error = 1;
  63                         continue;
  64                 }
  65                 if (fn(*p, ref, sha1))
  66                         had_error = 1;
  67         }
  68         return had_error;
  69 }
  70
  71 static int delete_replace_ref(const char *name, const char *ref,
  72                               const unsigned char *sha1)
  73 {
  74         if (delete_ref(ref, sha1, 0))
  75                 return 1;
  76         printf("Deleted replace ref '%s'\n", name);
  77         return 0;
  78 }
  79
  80 int cmd_replace(int argc, const char **argv, const char *prefix)
  81 {
  82         int list = 0, delete = 0;
  83         struct option options[] = {
  84                 OPT_BOOLEAN('l', NULL, &list, "list replace refs"),
  85                 OPT_BOOLEAN('d', NULL, &delete, "delete replace refs"),
  86                 OPT_END()
  87         };
  88
  89         argc = parse_options(argc, argv, options, git_replace_usage, 0);
  90
  91         if (list && delete)
  92                 usage_with_options(git_replace_usage, options);
  93
  94         if (delete) {
  95                 if (argc < 1)
  96                         usage_with_options(git_replace_usage, options);
  97                 return for_each_replace_name(argv, delete_replace_ref);
  98         }
  99
 100         /* List refs, even if "list" is not set */
 101         if (argc > 1)
 102                 usage_with_options(git_replace_usage, options);
 103
 104         return list_replace_refs(argv[0]);
 105 }