Add a small patch-mode testing library

diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index f171ee4a2beb3cfd6eec203f422799249508ee13..ca198250c3082be82cdca09954198d6617b95bf8 100644 (file)
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -119,7 +119,7 @@ static void handle_object(const unsigned char *sha1)
 
        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));
+               die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
        printf("\n");
 
        show_progress();
@@ -221,7 +221,8 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
        if (message)
                message += 2;
 
-       if (commit->parents) {
+       if (commit->parents &&
+           get_object_mark(&commit->parents->item->object) != 0) {
                parse_commit(commit->parents->item);
                diff_tree_sha1(commit->parents->item->tree->object.sha1,
                               commit->tree->object.sha1, "", &rev->diffopt);
@@ -427,21 +428,27 @@ static void export_marks(char *file)
        uint32_t mark;
        struct object_decoration *deco = idnums.hash;
        FILE *f;
+       int e = 0;
 
        f = fopen(file, "w");
        if (!f)
-               error("Unable to open marks file %s for writing", file);
+               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, ":%"PRIu32" %s\n", mark,
-                               sha1_to_hex(deco->base->sha1));
+                       if (fprintf(f, ":%"PRIu32" %s\n", mark,
+                               sha1_to_hex(deco->base->sha1)) < 0) {
+                           e = 1;
+                           break;
+                       }
                }
                deco++;
        }
 
-       if (ferror(f) || fclose(f))
+       e |= ferror(f);
+       e |= fclose(f);
+       if (e)
                error("Unable to write marks file %s.", file);
 }
 
@@ -450,7 +457,7 @@ 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));
+               die_errno("cannot read '%s'", input_file);
 
        while (fgets(line, sizeof(line), f)) {
                uint32_t mark;
@@ -514,7 +521,7 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 
        init_revisions(&revs, prefix);
        argc = setup_revisions(argc, argv, &revs, NULL);
-       argc = parse_options(argc, argv, options, fast_export_usage, 0);
+       argc = parse_options(argc, argv, prefix, options, fast_export_usage, 0);
        if (argc > 1)
                usage_with_options (fast_export_usage, options);