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         const char *git_dir;
  16
  17         strbuf_addf(&objects_directory, "%s/.git", path);
  18         git_dir = read_gitfile_gently(objects_directory.buf);
  19         if (git_dir) {
  20                 strbuf_reset(&objects_directory);
  21                 strbuf_addstr(&objects_directory, git_dir);
  22         }
  23         strbuf_addstr(&objects_directory, "/objects/");
  24         if (!is_directory(objects_directory.buf)) {
  25                 ret = -1;
  26                 goto done;
  27         }
  28         /* avoid adding it twice */
  29         for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
  30                 if (alt_odb->name - alt_odb->base == objects_directory.len &&
  31                                 !strncmp(alt_odb->base, objects_directory.buf,
  32                                         objects_directory.len))
  33                         goto done;
  34
  35         alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
  36         alt_odb->next = alt_odb_list;
  37         strcpy(alt_odb->base, objects_directory.buf);
  38         alt_odb->name = alt_odb->base + objects_directory.len;
  39         alt_odb->name[2] = '/';
  40         alt_odb->name[40] = '\0';
  41         alt_odb->name[41] = '\0';
  42         alt_odb_list = alt_odb;
  43         prepare_alt_odb();
  44 done:
  45         strbuf_release(&objects_directory);
  46         return ret;
  47 }
  48
  49 void handle_ignore_submodules_arg(struct diff_options *diffopt,
  50                                   const char *arg)
  51 {
  52         if (!strcmp(arg, "all"))
  53                 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
  54         else if (!strcmp(arg, "untracked"))
  55                 DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
  56         else if (!strcmp(arg, "dirty"))
  57                 DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
  58         else
  59                 die("bad --ignore-submodules argument: %s", arg);
  60 }
  61
  62 void show_submodule_summary(FILE *f, const char *path,
  63                 unsigned char one[20], unsigned char two[20],
  64                 unsigned dirty_submodule,
  65                 const char *del, const char *add, const char *reset)
  66 {
  67         struct rev_info rev;
  68         struct commit *commit, *left = left, *right = right;
  69         struct commit_list *merge_bases, *list;
  70         const char *message = NULL;
  71         struct strbuf sb = STRBUF_INIT;
  72         static const char *format = "  %m %s";
  73         int fast_forward = 0, fast_backward = 0;
  74
  75         if (is_null_sha1(two))
  76                 message = "(submodule deleted)";
  77         else if (add_submodule_odb(path))
  78                 message = "(not checked out)";
  79         else if (is_null_sha1(one))
  80                 message = "(new submodule)";
  81         else if (!(left = lookup_commit_reference(one)) ||
  82                  !(right = lookup_commit_reference(two)))
  83                 message = "(commits not present)";
  84
  85         if (!message) {
  86                 init_revisions(&rev, NULL);
  87                 setup_revisions(0, NULL, &rev, NULL);
  88                 rev.left_right = 1;
  89                 rev.first_parent_only = 1;
  90                 left->object.flags |= SYMMETRIC_LEFT;
  91                 add_pending_object(&rev, &left->object, path);
  92                 add_pending_object(&rev, &right->object, path);
  93                 merge_bases = get_merge_bases(left, right, 1);
  94                 if (merge_bases) {
  95                         if (merge_bases->item == left)
  96                                 fast_forward = 1;
  97                         else if (merge_bases->item == right)
  98                                 fast_backward = 1;
  99                 }
 100                 for (list = merge_bases; list; list = list->next) {
 101                         list->item->object.flags |= UNINTERESTING;
 102                         add_pending_object(&rev, &list->item->object,
 103                                 sha1_to_hex(list->item->object.sha1));
 104                 }
 105                 if (prepare_revision_walk(&rev))
 106                         message = "(revision walker failed)";
 107         }
 108
 109         if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
 110                 fprintf(f, "Submodule %s contains untracked content\n", path);
 111         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 112                 fprintf(f, "Submodule %s contains modified content\n", path);
 113
 114         if (!hashcmp(one, two)) {
 115                 strbuf_release(&sb);
 116                 return;
 117         }
 118
 119         strbuf_addf(&sb, "Submodule %s %s..", path,
 120                         find_unique_abbrev(one, DEFAULT_ABBREV));
 121         if (!fast_backward && !fast_forward)
 122                 strbuf_addch(&sb, '.');
 123         strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
 124         if (message)
 125                 strbuf_addf(&sb, " %s\n", message);
 126         else
 127                 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
 128         fwrite(sb.buf, sb.len, 1, f);
 129
 130         if (!message) {
 131                 while ((commit = get_revision(&rev))) {
 132                         struct pretty_print_context ctx = {0};
 133                         ctx.date_mode = rev.date_mode;
 134                         strbuf_setlen(&sb, 0);
 135                         if (commit->object.flags & SYMMETRIC_LEFT) {
 136                                 if (del)
 137                                         strbuf_addstr(&sb, del);
 138                         }
 139                         else if (add)
 140                                 strbuf_addstr(&sb, add);
 141                         format_commit_message(commit, format, &sb, &ctx);
 142                         if (reset)
 143                                 strbuf_addstr(&sb, reset);
 144                         strbuf_addch(&sb, '\n');
 145                         fprintf(f, "%s", sb.buf);
 146                 }
 147                 clear_commit_marks(left, ~0);
 148                 clear_commit_marks(right, ~0);
 149         }
 150         strbuf_release(&sb);
 151 }
 152
 153 unsigned is_submodule_modified(const char *path, int ignore_untracked)
 154 {
 155         ssize_t len;
 156         struct child_process cp;
 157         const char *argv[] = {
 158                 "status",
 159                 "--porcelain",
 160                 NULL,
 161                 NULL,
 162         };
 163         struct strbuf buf = STRBUF_INIT;
 164         unsigned dirty_submodule = 0;
 165         const char *line, *next_line;
 166         const char *git_dir;
 167
 168         strbuf_addf(&buf, "%s/.git", path);
 169         git_dir = read_gitfile_gently(buf.buf);
 170         if (!git_dir)
 171                 git_dir = buf.buf;
 172         if (!is_directory(git_dir)) {
 173                 strbuf_release(&buf);
 174                 /* The submodule is not checked out, so it is not modified */
 175                 return 0;
 176
 177         }
 178         strbuf_reset(&buf);
 179
 180         if (ignore_untracked)
 181                 argv[2] = "-uno";
 182
 183         memset(&cp, 0, sizeof(cp));
 184         cp.argv = argv;
 185         cp.env = local_repo_env;
 186         cp.git_cmd = 1;
 187         cp.no_stdin = 1;
 188         cp.out = -1;
 189         cp.dir = path;
 190         if (start_command(&cp))
 191                 die("Could not run git status --porcelain");
 192
 193         len = strbuf_read(&buf, cp.out, 1024);
 194         line = buf.buf;
 195         while (len > 2) {
 196                 if ((line[0] == '?') && (line[1] == '?')) {
 197                         dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
 198                         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 199                                 break;
 200                 } else {
 201                         dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
 202                         if (ignore_untracked ||
 203                             (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
 204                                 break;
 205                 }
 206                 next_line = strchr(line, '\n');
 207                 if (!next_line)
 208                         break;
 209                 next_line++;
 210                 len -= (next_line - line);
 211                 line = next_line;
 212         }
 213         close(cp.out);
 214
 215         if (finish_command(&cp))
 216                 die("git status --porcelain failed");
 217
 218         strbuf_release(&buf);
 219         return dirty_submodule;
 220 }