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