submodule.c

   1 #include "cache.h"
   2 #include "submodule.h"
   3 #include "dir.h"
   4 #include "diff.h"
   5 #include "commit.h"
   6 #include "revision.h"
   7
   8 int add_submodule_odb(const char *path)
   9 {
  10         struct strbuf objects_directory = STRBUF_INIT;
  11         struct alternate_object_database *alt_odb;
  12
  13         strbuf_addf(&objects_directory, "%s/.git/objects/", path);
  14         if (!is_directory(objects_directory.buf))
  15                 return -1;
  16
  17         /* avoid adding it twice */
  18         for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
  19                 if (alt_odb->name - alt_odb->base == objects_directory.len &&
  20                                 !strncmp(alt_odb->base, objects_directory.buf,
  21                                         objects_directory.len))
  22                         return 0;
  23
  24         alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
  25         alt_odb->next = alt_odb_list;
  26         strcpy(alt_odb->base, objects_directory.buf);
  27         alt_odb->name = alt_odb->base + objects_directory.len;
  28         alt_odb->name[2] = '/';
  29         alt_odb->name[40] = '\0';
  30         alt_odb->name[41] = '\0';
  31         alt_odb_list = alt_odb;
  32         prepare_alt_odb();
  33         return 0;
  34 }
  35
  36 void show_submodule_summary(FILE *f, const char *path,
  37                 unsigned char one[20], unsigned char two[20],
  38                 const char *del, const char *add, const char *reset)
  39 {
  40         struct rev_info rev;
  41         struct commit *commit, *left, *right;
  42         struct commit_list *merge_bases, *list;
  43         const char *message = NULL;
  44         struct strbuf sb = STRBUF_INIT;
  45         static const char *format = "  %m %s";
  46         int fast_forward = 0, fast_backward = 0;
  47
  48         if (is_null_sha1(two))
  49                 message = "(submodule deleted)";
  50         else if (add_submodule_odb(path))
  51                 message = "(not checked out)";
  52         else if (is_null_sha1(one))
  53                 message = "(new submodule)";
  54         else if (!(left = lookup_commit_reference(one)) ||
  55                         !(right = lookup_commit_reference(two)))
  56                 message = "(commits not present)";
  57
  58         if (!message) {
  59                 init_revisions(&rev, NULL);
  60                 setup_revisions(0, NULL, &rev, NULL);
  61                 rev.left_right = 1;
  62                 left->object.flags |= SYMMETRIC_LEFT;
  63                 add_pending_object(&rev, &left->object, path);
  64                 add_pending_object(&rev, &right->object, path);
  65                 merge_bases = get_merge_bases(left, right, 1);
  66                 if (merge_bases) {
  67                         if (merge_bases->item == left)
  68                                 fast_forward = 1;
  69                         else if (merge_bases->item == right)
  70                                 fast_backward = 1;
  71                 }
  72                 for (list = merge_bases; list; list = list->next) {
  73                         list->item->object.flags |= UNINTERESTING;
  74                         add_pending_object(&rev, &list->item->object,
  75                                 sha1_to_hex(list->item->object.sha1));
  76                 }
  77                 if (prepare_revision_walk(&rev))
  78                         message = "(revision walker failed)";
  79         }
  80
  81         strbuf_addf(&sb, "Submodule %s %s..", path,
  82                         find_unique_abbrev(one, DEFAULT_ABBREV));
  83         if (!fast_backward && !fast_forward)
  84                 strbuf_addch(&sb, '.');
  85         strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
  86         if (message)
  87                 strbuf_addf(&sb, " %s\n", message);
  88         else
  89                 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
  90         fwrite(sb.buf, sb.len, 1, f);
  91
  92         if (!message) {
  93                 while ((commit = get_revision(&rev))) {
  94                         strbuf_setlen(&sb, 0);
  95                         if (del)
  96                                 strbuf_addstr(&sb, commit->object.flags &
  97                                                 SYMMETRIC_LEFT ? del : add);
  98                         format_commit_message(commit, format, &sb,
  99                                         rev.date_mode);
 100                         if (del)
 101                                 strbuf_addstr(&sb, reset);
 102                         strbuf_addch(&sb, '\n');
 103                         fwrite(sb.buf, sb.len, 1, f);
 104                 }
 105                 clear_commit_marks(left, ~0);
 106                 clear_commit_marks(right, ~0);
 107         }
 108 }