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 #include "diffcore.h"
   9
  10 static int add_submodule_odb(const char *path)
  11 {
  12         struct strbuf objects_directory = STRBUF_INIT;
  13         struct alternate_object_database *alt_odb;
  14         int ret = 0;
  15
  16         strbuf_addf(&objects_directory, "%s/.git/objects/", path);
  17         if (!is_directory(objects_directory.buf)) {
  18                 ret = -1;
  19                 goto done;
  20         }
  21         /* avoid adding it twice */
  22         for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
  23                 if (alt_odb->name - alt_odb->base == objects_directory.len &&
  24                                 !strncmp(alt_odb->base, objects_directory.buf,
  25                                         objects_directory.len))
  26                         goto done;
  27
  28         alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
  29         alt_odb->next = alt_odb_list;
  30         strcpy(alt_odb->base, objects_directory.buf);
  31         alt_odb->name = alt_odb->base + objects_directory.len;
  32         alt_odb->name[2] = '/';
  33         alt_odb->name[40] = '\0';
  34         alt_odb->name[41] = '\0';
  35         alt_odb_list = alt_odb;
  36         prepare_alt_odb();
  37 done:
  38         strbuf_release(&objects_directory);
  39         return ret;
  40 }
  41
  42 void show_submodule_summary(FILE *f, const char *path,
  43                 unsigned char one[20], unsigned char two[20],
  44                 unsigned dirty_submodule,
  45                 const char *del, const char *add, const char *reset)
  46 {
  47         struct rev_info rev;
  48         struct commit *commit, *left = left, *right = right;
  49         struct commit_list *merge_bases, *list;
  50         const char *message = NULL;
  51         struct strbuf sb = STRBUF_INIT;
  52         static const char *format = "  %m %s";
  53         int fast_forward = 0, fast_backward = 0;
  54
  55         if (is_null_sha1(two))
  56                 message = "(submodule deleted)";
  57         else if (add_submodule_odb(path))
  58                 message = "(not checked out)";
  59         else if (is_null_sha1(one))
  60                 message = "(new submodule)";
  61         else if (!(left = lookup_commit_reference(one)) ||
  62                  !(right = lookup_commit_reference(two)))
  63                 message = "(commits not present)";
  64
  65         if (!message) {
  66                 init_revisions(&rev, NULL);
  67                 setup_revisions(0, NULL, &rev, NULL);
  68                 rev.left_right = 1;
  69                 rev.first_parent_only = 1;
  70                 left->object.flags |= SYMMETRIC_LEFT;
  71                 add_pending_object(&rev, &left->object, path);
  72                 add_pending_object(&rev, &right->object, path);
  73                 merge_bases = get_merge_bases(left, right, 1);
  74                 if (merge_bases) {
  75                         if (merge_bases->item == left)
  76                                 fast_forward = 1;
  77                         else if (merge_bases->item == right)
  78                                 fast_backward = 1;
  79                 }
  80                 for (list = merge_bases; list; list = list->next) {
  81                         list->item->object.flags |= UNINTERESTING;
  82                         add_pending_object(&rev, &list->item->object,
  83                                 sha1_to_hex(list->item->object.sha1));
  84                 }
  85                 if (prepare_revision_walk(&rev))
  86                         message = "(revision walker failed)";
  87         }
  88
  89         if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
  90                 fprintf(f, "Submodule %s contains untracked content\n", path);
  91         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
  92                 fprintf(f, "Submodule %s contains modified content\n", path);
  93
  94         if (!hashcmp(one, two)) {
  95                 strbuf_release(&sb);
  96                 return;
  97         }
  98
  99         strbuf_addf(&sb, "Submodule %s %s..", path,
 100                         find_unique_abbrev(one, DEFAULT_ABBREV));
 101         if (!fast_backward && !fast_forward)
 102                 strbuf_addch(&sb, '.');
 103         strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
 104         if (message)
 105                 strbuf_addf(&sb, " %s\n", message);
 106         else
 107                 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
 108         fwrite(sb.buf, sb.len, 1, f);
 109
 110         if (!message) {
 111                 while ((commit = get_revision(&rev))) {
 112                         struct pretty_print_context ctx = {0};
 113                         ctx.date_mode = rev.date_mode;
 114                         strbuf_setlen(&sb, 0);
 115                         if (commit->object.flags & SYMMETRIC_LEFT) {
 116                                 if (del)
 117                                         strbuf_addstr(&sb, del);
 118                         }
 119                         else if (add)
 120                                 strbuf_addstr(&sb, add);
 121                         format_commit_message(commit, format, &sb, &ctx);
 122                         if (reset)
 123                                 strbuf_addstr(&sb, reset);
 124                         strbuf_addch(&sb, '\n');
 125                         fprintf(f, "%s", sb.buf);
 126                 }
 127                 clear_commit_marks(left, ~0);
 128                 clear_commit_marks(right, ~0);
 129         }
 130         strbuf_release(&sb);
 131 }
 132
 133 unsigned is_submodule_modified(const char *path)
 134 {
 135         int i;
 136         ssize_t len;
 137         struct child_process cp;
 138         const char *argv[] = {
 139                 "status",
 140                 "--porcelain",
 141                 NULL,
 142         };
 143         const char *env[LOCAL_REPO_ENV_SIZE + 3];
 144         struct strbuf buf = STRBUF_INIT;
 145         unsigned dirty_submodule = 0;
 146         const char *line, *next_line;
 147
 148         for (i = 0; i < LOCAL_REPO_ENV_SIZE; i++)
 149                 env[i] = local_repo_env[i];
 150
 151         strbuf_addf(&buf, "%s/.git/", path);
 152         if (!is_directory(buf.buf)) {
 153                 strbuf_release(&buf);
 154                 /* The submodule is not checked out, so it is not modified */
 155                 return 0;
 156
 157         }
 158         strbuf_reset(&buf);
 159
 160         strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
 161         env[i++] = strbuf_detach(&buf, NULL);
 162         strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
 163         env[i++] = strbuf_detach(&buf, NULL);
 164         env[i] = NULL;
 165
 166         memset(&cp, 0, sizeof(cp));
 167         cp.argv = argv;
 168         cp.env = env;
 169         cp.git_cmd = 1;
 170         cp.no_stdin = 1;
 171         cp.out = -1;
 172         if (start_command(&cp))
 173                 die("Could not run git status --porcelain");
 174
 175         len = strbuf_read(&buf, cp.out, 1024);
 176         line = buf.buf;
 177         while (len > 2) {
 178                 if ((line[0] == '?') && (line[1] == '?')) {
 179                         dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
 180                         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 181                                 break;
 182                 } else {
 183                         dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
 184                         if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
 185                                 break;
 186                 }
 187                 next_line = strchr(line, '\n');
 188                 if (!next_line)
 189                         break;
 190                 next_line++;
 191                 len -= (next_line - line);
 192                 line = next_line;
 193         }
 194         close(cp.out);
 195
 196         if (finish_command(&cp))
 197                 die("git status --porcelain failed");
 198
 199         for (i = LOCAL_REPO_ENV_SIZE; env[i]; i++)
 200                 free((char *)env[i]);
 201         strbuf_release(&buf);
 202         return dirty_submodule;
 203 }