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