pack-objects: Allow missing base objects when creating thin packs

diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index 76f3167276d55f1ffae2b0070d3adef738328bad..070971616dbb12d005c5c9a1f82cc5b0c5391f62 100644 (file)
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -13,7 +13,7 @@
 #include "log-tree.h"
 #include "revision.h"
 #include "decorate.h"
-#include "path-list.h"
+#include "string-list.h"
 #include "utf8.h"
 #include "parse-options.h"
 
@@ -132,13 +132,46 @@ static void show_filemodify(struct diff_queue_struct *q,
 {
        int i;
        for (i = 0; i < q->nr; i++) {
+               struct diff_filespec *ospec = q->queue[i]->one;
                struct diff_filespec *spec = q->queue[i]->two;
-               if (is_null_sha1(spec->sha1))
+
+               switch (q->queue[i]->status) {
+               case DIFF_STATUS_DELETED:
                        printf("D %s\n", spec->path);
-               else {
-                       struct object *object = lookup_object(spec->sha1);
-                       printf("M %06o :%d %s\n", spec->mode,
-                              get_object_mark(object), spec->path);
+                       break;
+
+               case DIFF_STATUS_COPIED:
+               case DIFF_STATUS_RENAMED:
+                       printf("%c \"%s\" \"%s\"\n", q->queue[i]->status,
+                              ospec->path, spec->path);
+
+                       if (!hashcmp(ospec->sha1, spec->sha1) &&
+                           ospec->mode == spec->mode)
+                               break;
+                       /* fallthrough */
+
+               case DIFF_STATUS_TYPE_CHANGED:
+               case DIFF_STATUS_MODIFIED:
+               case DIFF_STATUS_ADDED:
+                       /*
+                        * Links refer to objects in another repositories;
+                        * output the SHA-1 verbatim.
+                        */
+                       if (S_ISGITLINK(spec->mode))
+                               printf("M %06o %s %s\n", spec->mode,
+                                      sha1_to_hex(spec->sha1), spec->path);
+                       else {
+                               struct object *object = lookup_object(spec->sha1);
+                               printf("M %06o :%d %s\n", spec->mode,
+                                      get_object_mark(object), spec->path);
+                       }
+                       break;
+
+               default:
+                       die("Unexpected comparison status '%c' for %s, %s",
+                               q->queue[i]->status,
+                               ospec->path ? ospec->path : "none",
+                               spec->path ? spec->path : "none");
                }
        }
 }
@@ -196,8 +229,10 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
                diff_root_tree_sha1(commit->tree->object.sha1,
                                    "", &rev->diffopt);
 
+       /* Export the referenced blobs, and remember the marks. */
        for (i = 0; i < diff_queued_diff.nr; i++)
-               handle_object(diff_queued_diff.queue[i]->two->sha1);
+               if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
+                       handle_object(diff_queued_diff.queue[i]->two->sha1);
 
        mark_next_object(&commit->object);
        if (!is_encoding_utf8(encoding))
@@ -298,7 +333,7 @@ static void handle_tag(const char *name, struct tag *tag)
 }
 
 static void get_tags_and_duplicates(struct object_array *pending,
-                                   struct path_list *extra_refs)
+                                   struct string_list *extra_refs)
 {
        struct tag *tag;
        int i;
@@ -319,7 +354,7 @@ static void get_tags_and_duplicates(struct object_array *pending,
                case OBJ_TAG:
                        tag = (struct tag *)e->item;
                        while (tag && tag->object.type == OBJ_TAG) {
-                               path_list_insert(full_name, extra_refs)->util = tag;
+                               string_list_insert(full_name, extra_refs)->util = tag;
                                tag = (struct tag *)tag->tagged;
                        }
                        if (!tag)
@@ -339,19 +374,19 @@ static void get_tags_and_duplicates(struct object_array *pending,
                }
                if (commit->util)
                        /* more than one name for the same object */
-                       path_list_insert(full_name, extra_refs)->util = commit;
+                       string_list_insert(full_name, extra_refs)->util = commit;
                else
                        commit->util = full_name;
        }
 }
 
-static void handle_tags_and_duplicates(struct path_list *extra_refs)
+static void handle_tags_and_duplicates(struct string_list *extra_refs)
 {
        struct commit *commit;
        int i;
 
        for (i = extra_refs->nr - 1; i >= 0; i--) {
-               const char *name = extra_refs->items[i].path;
+               const char *name = extra_refs->items[i].string;
                struct object *object = extra_refs->items[i].util;
                switch (object->type) {
                case OBJ_TAG:
@@ -434,7 +469,7 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 {
        struct rev_info revs;
        struct object_array commits = { 0, 0, NULL };
-       struct path_list extra_refs = { NULL, 0, 0, 0 };
+       struct string_list extra_refs = { NULL, 0, 0, 0 };
        struct commit *commit;
        char *export_filename = NULL, *import_filename = NULL;
        struct option options[] = {