Merge branch 'qq/maint'

[git.git] / builtin-fast-export.c

diff --git a/builtin-fast-export.c b/builtin-fast-export.c
old mode 100755 (executable)
new mode 100644 (file)
index e1c5630..75132ba
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -56,10 +56,24 @@ static int has_unshown_parent(struct commit *commit)
 }
 
 /* Since intptr_t is C99, we do not use it here */
-static void mark_object(struct object *object)
+static inline uint32_t *mark_to_ptr(uint32_t mark)
 {
-       last_idnum++;
-       add_decoration(&idnums, object, ((uint32_t *)NULL) + last_idnum);
+       return ((uint32_t *)NULL) + mark;
+}
+
+static inline uint32_t ptr_to_mark(void * mark)
+{
+       return (uint32_t *)mark - (uint32_t *)NULL;
+}
+
+static inline void mark_object(struct object *object, uint32_t mark)
+{
+       add_decoration(&idnums, object, mark_to_ptr(mark));
+}
+
+static inline void mark_next_object(struct object *object)
+{
+       mark_object(object, ++last_idnum);
 }
 
 static int get_object_mark(struct object *object)
@@ -67,7 +81,7 @@ static int get_object_mark(struct object *object)
        void *decoration = lookup_decoration(&idnums, object);
        if (!decoration)
                return 0;
-       return (uint32_t *)decoration - (uint32_t *)NULL;
+       return ptr_to_mark(decoration);
 }
 
 static void show_progress(void)
@@ -100,9 +114,9 @@ static void handle_object(const unsigned char *sha1)
        if (!buf)
                die ("Could not read blob %s", sha1_to_hex(sha1));
 
-       mark_object(object);
+       mark_next_object(object);
 
-       printf("blob\nmark :%d\ndata %lu\n", last_idnum, size);
+       printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
        if (size && fwrite(buf, size, 1, stdout) != 1)
                die ("Could not write blob %s", sha1_to_hex(sha1));
        printf("\n");
@@ -185,10 +199,12 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
        for (i = 0; i < diff_queued_diff.nr; i++)
                handle_object(diff_queued_diff.queue[i]->two->sha1);
 
-       mark_object(&commit->object);
+       mark_next_object(&commit->object);
        if (!is_encoding_utf8(encoding))
                reencoded = reencode_string(message, "UTF-8", encoding);
-       printf("commit %s\nmark :%d\n%.*s\n%.*s\ndata %u\n%s",
+       if (!commit->parents)
+               printf("reset %s\n", (const char*)commit->util);
+       printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
               (const char *)commit->util, last_idnum,
               (int)(author_end - author), author,
               (int)(committer_end - committer), committer,
@@ -204,14 +220,10 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
                        continue;
                if (i == 0)
                        printf("from :%d\n", mark);
-               else if (i == 1)
-                       printf("merge :%d", mark);
                else
-                       printf(" :%d", mark);
+                       printf("merge :%d\n", mark);
                i++;
        }
-       if (i > 1)
-               printf("\n");
 
        log_tree_diff_flush(rev);
        rev->diffopt.output_format = saved_output_format;
@@ -356,23 +368,90 @@ static void handle_tags_and_duplicates(struct path_list *extra_refs)
        }
 }
 
+static void export_marks(char *file)
+{
+       unsigned int i;
+       uint32_t mark;
+       struct object_decoration *deco = idnums.hash;
+       FILE *f;
+
+       f = fopen(file, "w");
+       if (!f)
+               error("Unable to open marks file %s for writing", file);
+
+       for (i = 0; i < idnums.size; i++) {
+               if (deco->base && deco->base->type == 1) {
+                       mark = ptr_to_mark(deco->decoration);
+                       fprintf(f, ":%u %s\n", mark, sha1_to_hex(deco->base->sha1));
+               }
+               deco++;
+       }
+
+       if (ferror(f) || fclose(f))
+               error("Unable to write marks file %s.", file);
+}
+
+static void import_marks(char *input_file)
+{
+       char line[512];
+       FILE *f = fopen(input_file, "r");
+       if (!f)
+               die("cannot read %s: %s", input_file, strerror(errno));
+
+       while (fgets(line, sizeof(line), f)) {
+               uint32_t mark;
+               char *line_end, *mark_end;
+               unsigned char sha1[20];
+               struct object *object;
+
+               line_end = strchr(line, '\n');
+               if (line[0] != ':' || !line_end)
+                       die("corrupt mark line: %s", line);
+               *line_end = '\0';
+
+               mark = strtoumax(line + 1, &mark_end, 10);
+               if (!mark || mark_end == line + 1
+                       || *mark_end != ' ' || get_sha1(mark_end + 1, sha1))
+                       die("corrupt mark line: %s", line);
+
+               object = parse_object(sha1);
+               if (!object)
+                       die ("Could not read blob %s", sha1_to_hex(sha1));
+
+               if (object->flags & SHOWN)
+                       error("Object %s already has a mark", sha1);
+
+               mark_object(object, mark);
+               if (last_idnum < mark)
+                       last_idnum = mark;
+
+               object->flags |= SHOWN;
+       }
+       fclose(f);
+}
+
 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 commit *commit;
+       char *export_filename = NULL, *import_filename = NULL;
        struct option options[] = {
                OPT_INTEGER(0, "progress", &progress,
                            "show progress after <n> objects"),
                OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, "mode",
                             "select handling of signed tags",
                             parse_opt_signed_tag_mode),
+               OPT_STRING(0, "export-marks", &export_filename, "FILE",
+                            "Dump marks to this file"),
+               OPT_STRING(0, "import-marks", &import_filename, "FILE",
+                            "Import marks from this file"),
                OPT_END()
        };
 
        /* we handle encodings */
-       git_config(git_default_config);
+       git_config(git_default_config, NULL);
 
        init_revisions(&revs, prefix);
        argc = setup_revisions(argc, argv, &revs, NULL);
@@ -380,6 +459,9 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
        if (argc > 1)
                usage_with_options (fast_export_usage, options);
 
+       if (import_filename)
+               import_marks(import_filename);
+
        get_tags_and_duplicates(&revs.pending, &extra_refs);
 
        if (prepare_revision_walk(&revs))
@@ -402,5 +484,8 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 
        handle_tags_and_duplicates(&extra_refs);
 
+       if (export_filename)
+               export_marks(export_filename);
+
        return 0;
 }