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authorJohannes Schindelin <johannes.schindelin@gmx.de>2009-10-19 12:38:32 (GMT)
committerJunio C Hamano <gitster@pobox.com>2009-10-20 05:31:00 (GMT)
commit752c0c24926aacbceca0d27de6ad22cbb7dd0709 (patch)
tree94fb54e076f11d2ef66d888cd8493e1520639ef3 /submodule.c
parentdbc1b1f71052c084a84b5c395e1cb4b5ae526fcb (diff)
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Add the --submodule option to the diff option family
When you use the option --submodule=log you can see the submodule summaries inlined in the diff, instead of not-quite-helpful SHA-1 pairs. The format imitates what "git submodule summary" shows. To do that, <path>/.git/objects/ is added to the alternate object databases (if that directory exists). This option was requested by Jens Lehmann at the GitTogether in Berlin. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'submodule.c')
-rw-r--r--submodule.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/submodule.c b/submodule.c
new file mode 100644
index 0000000..d5fce7a
--- /dev/null
+++ b/submodule.c
@@ -0,0 +1,113 @@
+#include "cache.h"
+#include "submodule.h"
+#include "dir.h"
+#include "diff.h"
+#include "commit.h"
+#include "revision.h"
+
+int add_submodule_odb(const char *path)
+{
+ struct strbuf objects_directory = STRBUF_INIT;
+ struct alternate_object_database *alt_odb;
+
+ strbuf_addf(&objects_directory, "%s/.git/objects/", path);
+ if (!is_directory(objects_directory.buf))
+ return -1;
+
+ /* avoid adding it twice */
+ for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
+ if (alt_odb->name - alt_odb->base == objects_directory.len &&
+ !strncmp(alt_odb->base, objects_directory.buf,
+ objects_directory.len))
+ return 0;
+
+ alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
+ alt_odb->next = alt_odb_list;
+ strcpy(alt_odb->base, objects_directory.buf);
+ alt_odb->name = alt_odb->base + objects_directory.len;
+ alt_odb->name[2] = '/';
+ alt_odb->name[40] = '\0';
+ alt_odb->name[41] = '\0';
+ alt_odb_list = alt_odb;
+ prepare_alt_odb();
+ return 0;
+}
+
+void show_submodule_summary(FILE *f, const char *path,
+ unsigned char one[20], unsigned char two[20],
+ const char *del, const char *add, const char *reset)
+{
+ struct rev_info rev;
+ struct commit *commit, *left = left, *right;
+ struct commit_list *merge_bases, *list;
+ const char *message = NULL;
+ struct strbuf sb = STRBUF_INIT;
+ static const char *format = " %m %s";
+ int fast_forward = 0, fast_backward = 0;
+
+ if (is_null_sha1(two))
+ message = "(submodule deleted)";
+ else if (add_submodule_odb(path))
+ message = "(not checked out)";
+ else if (is_null_sha1(one))
+ message = "(new submodule)";
+ else if (!(left = lookup_commit_reference(one)) ||
+ !(right = lookup_commit_reference(two)))
+ message = "(commits not present)";
+
+ if (!message) {
+ init_revisions(&rev, NULL);
+ setup_revisions(0, NULL, &rev, NULL);
+ rev.left_right = 1;
+ rev.first_parent_only = 1;
+ left->object.flags |= SYMMETRIC_LEFT;
+ add_pending_object(&rev, &left->object, path);
+ add_pending_object(&rev, &right->object, path);
+ merge_bases = get_merge_bases(left, right, 1);
+ if (merge_bases) {
+ if (merge_bases->item == left)
+ fast_forward = 1;
+ else if (merge_bases->item == right)
+ fast_backward = 1;
+ }
+ for (list = merge_bases; list; list = list->next) {
+ list->item->object.flags |= UNINTERESTING;
+ add_pending_object(&rev, &list->item->object,
+ sha1_to_hex(list->item->object.sha1));
+ }
+ if (prepare_revision_walk(&rev))
+ message = "(revision walker failed)";
+ }
+
+ strbuf_addf(&sb, "Submodule %s %s..", path,
+ find_unique_abbrev(one, DEFAULT_ABBREV));
+ if (!fast_backward && !fast_forward)
+ strbuf_addch(&sb, '.');
+ strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
+ if (message)
+ strbuf_addf(&sb, " %s\n", message);
+ else
+ strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
+ fwrite(sb.buf, sb.len, 1, f);
+
+ if (!message) {
+ while ((commit = get_revision(&rev))) {
+ strbuf_setlen(&sb, 0);
+ if (commit->object.flags & SYMMETRIC_LEFT) {
+ if (del)
+ strbuf_addstr(&sb, del);
+ }
+ else if (add)
+ strbuf_addstr(&sb, add);
+ format_commit_message(commit, format, &sb,
+ rev.date_mode);
+ if (reset)
+ strbuf_addstr(&sb, reset);
+ strbuf_addch(&sb, '\n');
+ fprintf(f, "%s", sb.buf);
+ }
+ clear_commit_marks(left, ~0);
+ clear_commit_marks(right, ~0);
+ }
+ strbuf_release(&sb);
+}