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 #include "run-command.h"
   8
   9 static int add_submodule_odb(const char *path)
  10 {
  11         struct strbuf objects_directory = STRBUF_INIT;
  12         struct alternate_object_database *alt_odb;
  13         int ret = 0;
  14
  15         strbuf_addf(&objects_directory, "%s/.git/objects/", path);
  16         if (!is_directory(objects_directory.buf)) {
  17                 ret = -1;
  18                 goto done;
  19         }
  20         /* avoid adding it twice */
  21         for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
  22                 if (alt_odb->name - alt_odb->base == objects_directory.len &&
  23                                 !strncmp(alt_odb->base, objects_directory.buf,
  24                                         objects_directory.len))
  25                         goto done;
  26
  27         alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
  28         alt_odb->next = alt_odb_list;
  29         strcpy(alt_odb->base, objects_directory.buf);
  30         alt_odb->name = alt_odb->base + objects_directory.len;
  31         alt_odb->name[2] = '/';
  32         alt_odb->name[40] = '\0';
  33         alt_odb->name[41] = '\0';
  34         alt_odb_list = alt_odb;
  35         prepare_alt_odb();
  36 done:
  37         strbuf_release(&objects_directory);
  38         return ret;
  39 }
  40
  41 void show_submodule_summary(FILE *f, const char *path,
  42                 unsigned char one[20], unsigned char two[20],
  43                 unsigned dirty_submodule,
  44                 const char *del, const char *add, const char *reset)
  45 {
  46         struct rev_info rev;
  47         struct commit *commit, *left = left, *right = right;
  48         struct commit_list *merge_bases, *list;
  49         const char *message = NULL;
  50         struct strbuf sb = STRBUF_INIT;
  51         static const char *format = "  %m %s";
  52         int fast_forward = 0, fast_backward = 0;
  53
  54         if (is_null_sha1(two))
  55                 message = "(submodule deleted)";
  56         else if (add_submodule_odb(path))
  57                 message = "(not checked out)";
  58         else if (is_null_sha1(one))
  59                 message = "(new submodule)";
  60         else if (!(left = lookup_commit_reference(one)) ||
  61                  !(right = lookup_commit_reference(two)))
  62                 message = "(commits not present)";
  63
  64         if (!message) {
  65                 init_revisions(&rev, NULL);
  66                 setup_revisions(0, NULL, &rev, NULL);
  67                 rev.left_right = 1;
  68                 rev.first_parent_only = 1;
  69                 left->object.flags |= SYMMETRIC_LEFT;
  70                 add_pending_object(&rev, &left->object, path);
  71                 add_pending_object(&rev, &right->object, path);
  72                 merge_bases = get_merge_bases(left, right, 1);
  73                 if (merge_bases) {
  74                         if (merge_bases->item == left)
  75                                 fast_forward = 1;
  76                         else if (merge_bases->item == right)
  77                                 fast_backward = 1;
  78                 }
  79                 for (list = merge_bases; list; list = list->next) {
  80                         list->item->object.flags |= UNINTERESTING;
  81                         add_pending_object(&rev, &list->item->object,
  82                                 sha1_to_hex(list->item->object.sha1));
  83                 }
  84                 if (prepare_revision_walk(&rev))
  85                         message = "(revision walker failed)";
  86         }
  87
  88         strbuf_addf(&sb, "Submodule %s %s..", path,
  89                         find_unique_abbrev(one, DEFAULT_ABBREV));
  90         if (!fast_backward && !fast_forward)
  91                 strbuf_addch(&sb, '.');
  92         strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
  93         if (dirty_submodule)
  94                 strbuf_add(&sb, "-dirty", 6);
  95         if (message)
  96                 strbuf_addf(&sb, " %s\n", message);
  97         else
  98                 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
  99         fwrite(sb.buf, sb.len, 1, f);
 100
 101         if (!message) {
 102                 while ((commit = get_revision(&rev))) {
 103                         struct pretty_print_context ctx = {0};
 104                         ctx.date_mode = rev.date_mode;
 105                         strbuf_setlen(&sb, 0);
 106                         if (commit->object.flags & SYMMETRIC_LEFT) {
 107                                 if (del)
 108                                         strbuf_addstr(&sb, del);
 109                         }
 110                         else if (add)
 111                                 strbuf_addstr(&sb, add);
 112                         format_commit_message(commit, format, &sb, &ctx);
 113                         if (reset)
 114                                 strbuf_addstr(&sb, reset);
 115                         strbuf_addch(&sb, '\n');
 116                         fprintf(f, "%s", sb.buf);
 117                 }
 118                 clear_commit_marks(left, ~0);
 119                 clear_commit_marks(right, ~0);
 120         }
 121         strbuf_release(&sb);
 122 }
 123
 124 int is_submodule_modified(const char *path)
 125 {
 126         int len;
 127         struct child_process cp;
 128         const char *argv[] = {
 129                 "status",
 130                 "--porcelain",
 131                 NULL,
 132         };
 133         char *env[4];
 134         struct strbuf buf = STRBUF_INIT;
 135
 136         strbuf_addf(&buf, "%s/.git/", path);
 137         if (!is_directory(buf.buf)) {
 138                 strbuf_release(&buf);
 139                 /* The submodule is not checked out, so it is not modified */
 140                 return 0;
 141
 142         }
 143         strbuf_reset(&buf);
 144
 145         strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
 146         env[0] = strbuf_detach(&buf, NULL);
 147         strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
 148         env[1] = strbuf_detach(&buf, NULL);
 149         strbuf_addf(&buf, "GIT_INDEX_FILE");
 150         env[2] = strbuf_detach(&buf, NULL);
 151         env[3] = NULL;
 152
 153         memset(&cp, 0, sizeof(cp));
 154         cp.argv = argv;
 155         cp.env = (const char *const *)env;
 156         cp.git_cmd = 1;
 157         cp.no_stdin = 1;
 158         cp.out = -1;
 159         if (start_command(&cp))
 160                 die("Could not run git status --porcelain");
 161
 162         len = strbuf_read(&buf, cp.out, 1024);
 163         close(cp.out);
 164
 165         if (finish_command(&cp))
 166                 die("git status --porcelain failed");
 167
 168         free(env[0]);
 169         free(env[1]);
 170         free(env[2]);
 171         strbuf_release(&buf);
 172         return len != 0;
 173 }