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 #include "string-list.h"
  10
  11 struct string_list config_name_for_path;
  12 struct string_list config_ignore_for_name;
  13
  14 static int add_submodule_odb(const char *path)
  15 {
  16         struct strbuf objects_directory = STRBUF_INIT;
  17         struct alternate_object_database *alt_odb;
  18         int ret = 0;
  19         const char *git_dir;
  20
  21         strbuf_addf(&objects_directory, "%s/.git", path);
  22         git_dir = read_gitfile_gently(objects_directory.buf);
  23         if (git_dir) {
  24                 strbuf_reset(&objects_directory);
  25                 strbuf_addstr(&objects_directory, git_dir);
  26         }
  27         strbuf_addstr(&objects_directory, "/objects/");
  28         if (!is_directory(objects_directory.buf)) {
  29                 ret = -1;
  30                 goto done;
  31         }
  32         /* avoid adding it twice */
  33         for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
  34                 if (alt_odb->name - alt_odb->base == objects_directory.len &&
  35                                 !strncmp(alt_odb->base, objects_directory.buf,
  36                                         objects_directory.len))
  37                         goto done;
  38
  39         alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
  40         alt_odb->next = alt_odb_list;
  41         strcpy(alt_odb->base, objects_directory.buf);
  42         alt_odb->name = alt_odb->base + objects_directory.len;
  43         alt_odb->name[2] = '/';
  44         alt_odb->name[40] = '\0';
  45         alt_odb->name[41] = '\0';
  46         alt_odb_list = alt_odb;
  47         prepare_alt_odb();
  48 done:
  49         strbuf_release(&objects_directory);
  50         return ret;
  51 }
  52
  53 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
  54                                              const char *path)
  55 {
  56         struct string_list_item *path_option, *ignore_option;
  57         path_option = unsorted_string_list_lookup(&config_name_for_path, path);
  58         if (path_option) {
  59                 ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util);
  60                 if (ignore_option)
  61                         handle_ignore_submodules_arg(diffopt, ignore_option->util);
  62         }
  63 }
  64
  65 int parse_submodule_config_option(const char *var, const char *value)
  66 {
  67         int len;
  68         struct string_list_item *config;
  69         struct strbuf submodname = STRBUF_INIT;
  70
  71         var += 10;              /* Skip "submodule." */
  72
  73         len = strlen(var);
  74         if ((len > 5) && !strcmp(var + len - 5, ".path")) {
  75                 strbuf_add(&submodname, var, len - 5);
  76                 config = unsorted_string_list_lookup(&config_name_for_path, value);
  77                 if (config)
  78                         free(config->util);
  79                 else
  80                         config = string_list_append(&config_name_for_path, xstrdup(value));
  81                 config->util = strbuf_detach(&submodname, NULL);
  82                 strbuf_release(&submodname);
  83         } else if ((len > 7) && !strcmp(var + len - 7, ".ignore")) {
  84                 if (strcmp(value, "untracked") && strcmp(value, "dirty") &&
  85                     strcmp(value, "all") && strcmp(value, "none")) {
  86                         warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var);
  87                         return 0;
  88                 }
  89
  90                 strbuf_add(&submodname, var, len - 7);
  91                 config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf);
  92                 if (config)
  93                         free(config->util);
  94                 else
  95                         config = string_list_append(&config_ignore_for_name,
  96                                                     strbuf_detach(&submodname, NULL));
  97                 strbuf_release(&submodname);
  98                 config->util = xstrdup(value);
  99                 return 0;
 100         }
 101         return 0;
 102 }
 103
 104 void handle_ignore_submodules_arg(struct diff_options *diffopt,
 105                                   const char *arg)
 106 {
 107         if (!strcmp(arg, "all"))
 108                 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
 109         else if (!strcmp(arg, "untracked"))
 110                 DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
 111         else if (!strcmp(arg, "dirty"))
 112                 DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
 113         else if (strcmp(arg, "none"))
 114                 die("bad --ignore-submodules argument: %s", arg);
 115 }
 116
 117 void show_submodule_summary(FILE *f, const char *path,
 118                 unsigned char one[20], unsigned char two[20],
 119                 unsigned dirty_submodule,
 120                 const char *del, const char *add, const char *reset)
 121 {
 122         struct rev_info rev;
 123         struct commit *commit, *left = left, *right = right;
 124         struct commit_list *merge_bases, *list;
 125         const char *message = NULL;
 126         struct strbuf sb = STRBUF_INIT;
 127         static const char *format = "  %m %s";
 128         int fast_forward = 0, fast_backward = 0;
 129
 130         if (is_null_sha1(two))
 131                 message = "(submodule deleted)";
 132         else if (add_submodule_odb(path))
 133                 message = "(not checked out)";
 134         else if (is_null_sha1(one))
 135                 message = "(new submodule)";
 136         else if (!(left = lookup_commit_reference(one)) ||
 137                  !(right = lookup_commit_reference(two)))
 138                 message = "(commits not present)";
 139
 140         if (!message) {
 141                 init_revisions(&rev, NULL);
 142                 setup_revisions(0, NULL, &rev, NULL);
 143                 rev.left_right = 1;
 144                 rev.first_parent_only = 1;
 145                 left->object.flags |= SYMMETRIC_LEFT;
 146                 add_pending_object(&rev, &left->object, path);
 147                 add_pending_object(&rev, &right->object, path);
 148                 merge_bases = get_merge_bases(left, right, 1);
 149                 if (merge_bases) {
 150                         if (merge_bases->item == left)
 151                                 fast_forward = 1;
 152                         else if (merge_bases->item == right)
 153                                 fast_backward = 1;
 154                 }
 155                 for (list = merge_bases; list; list = list->next) {
 156                         list->item->object.flags |= UNINTERESTING;
 157                         add_pending_object(&rev, &list->item->object,
 158                                 sha1_to_hex(list->item->object.sha1));
 159                 }
 160                 if (prepare_revision_walk(&rev))
 161                         message = "(revision walker failed)";
 162         }
 163
 164         if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
 165                 fprintf(f, "Submodule %s contains untracked content\n", path);
 166         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 167                 fprintf(f, "Submodule %s contains modified content\n", path);
 168
 169         if (!hashcmp(one, two)) {
 170                 strbuf_release(&sb);
 171                 return;
 172         }
 173
 174         strbuf_addf(&sb, "Submodule %s %s..", path,
 175                         find_unique_abbrev(one, DEFAULT_ABBREV));
 176         if (!fast_backward && !fast_forward)
 177                 strbuf_addch(&sb, '.');
 178         strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
 179         if (message)
 180                 strbuf_addf(&sb, " %s\n", message);
 181         else
 182                 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
 183         fwrite(sb.buf, sb.len, 1, f);
 184
 185         if (!message) {
 186                 while ((commit = get_revision(&rev))) {
 187                         struct pretty_print_context ctx = {0};
 188                         ctx.date_mode = rev.date_mode;
 189                         strbuf_setlen(&sb, 0);
 190                         if (commit->object.flags & SYMMETRIC_LEFT) {
 191                                 if (del)
 192                                         strbuf_addstr(&sb, del);
 193                         }
 194                         else if (add)
 195                                 strbuf_addstr(&sb, add);
 196                         format_commit_message(commit, format, &sb, &ctx);
 197                         if (reset)
 198                                 strbuf_addstr(&sb, reset);
 199                         strbuf_addch(&sb, '\n');
 200                         fprintf(f, "%s", sb.buf);
 201                 }
 202                 clear_commit_marks(left, ~0);
 203                 clear_commit_marks(right, ~0);
 204         }
 205         strbuf_release(&sb);
 206 }
 207
 208 unsigned is_submodule_modified(const char *path, int ignore_untracked)
 209 {
 210         ssize_t len;
 211         struct child_process cp;
 212         const char *argv[] = {
 213                 "status",
 214                 "--porcelain",
 215                 NULL,
 216                 NULL,
 217         };
 218         struct strbuf buf = STRBUF_INIT;
 219         unsigned dirty_submodule = 0;
 220         const char *line, *next_line;
 221         const char *git_dir;
 222
 223         strbuf_addf(&buf, "%s/.git", path);
 224         git_dir = read_gitfile_gently(buf.buf);
 225         if (!git_dir)
 226                 git_dir = buf.buf;
 227         if (!is_directory(git_dir)) {
 228                 strbuf_release(&buf);
 229                 /* The submodule is not checked out, so it is not modified */
 230                 return 0;
 231
 232         }
 233         strbuf_reset(&buf);
 234
 235         if (ignore_untracked)
 236                 argv[2] = "-uno";
 237
 238         memset(&cp, 0, sizeof(cp));
 239         cp.argv = argv;
 240         cp.env = local_repo_env;
 241         cp.git_cmd = 1;
 242         cp.no_stdin = 1;
 243         cp.out = -1;
 244         cp.dir = path;
 245         if (start_command(&cp))
 246                 die("Could not run git status --porcelain");
 247
 248         len = strbuf_read(&buf, cp.out, 1024);
 249         line = buf.buf;
 250         while (len > 2) {
 251                 if ((line[0] == '?') && (line[1] == '?')) {
 252                         dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
 253                         if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 254                                 break;
 255                 } else {
 256                         dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
 257                         if (ignore_untracked ||
 258                             (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
 259                                 break;
 260                 }
 261                 next_line = strchr(line, '\n');
 262                 if (!next_line)
 263                         break;
 264                 next_line++;
 265                 len -= (next_line - line);
 266                 line = next_line;
 267         }
 268         close(cp.out);
 269
 270         if (finish_command(&cp))
 271                 die("git status --porcelain failed");
 272
 273         strbuf_release(&buf);
 274         return dirty_submodule;
 275 }