fast-import: add input format tests

diff --git a/builtin/merge.c b/builtin/merge.c
index 7eebb71491047b2df6231df500e5fc28db1881b4..325891edb610945d01899b102993202af279bf3f 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -339,13 +339,14 @@ static void squash_message(void)
 
        ctx.abbrev = rev.abbrev;
        ctx.date_mode = rev.date_mode;
+       ctx.fmt = rev.commit_format;
 
        strbuf_addstr(&out, "Squashed commit of the following:\n");
        while ((commit = get_revision(&rev)) != NULL) {
                strbuf_addch(&out, '\n');
                strbuf_addf(&out, "commit %s\n",
                        sha1_to_hex(commit->object.sha1));
-               pretty_print_commit(rev.commit_format, commit, &out, &ctx);
+               pretty_print_commit(&ctx, commit, &out);
        }
        if (write(fd, out.buf, out.len) < 0)
                die_errno(_("Writing SQUASH_MSG"));
@@ -608,6 +609,14 @@ static void write_tree_trivial(unsigned char *sha1)
                die(_("git write-tree failed to write a tree"));
 }
 
+static const char *merge_argument(struct commit *commit)
+{
+       if (commit)
+               return sha1_to_hex(commit->object.sha1);
+       else
+               return EMPTY_TREE_SHA1_HEX;
+}
+
 int try_merge_command(const char *strategy, size_t xopts_nr,
                      const char **xopts, struct commit_list *common,
                      const char *head_arg, struct commit_list *remotes)
@@ -628,11 +637,11 @@ int try_merge_command(const char *strategy, size_t xopts_nr,
                args[i++] = s;
        }
        for (j = common; j; j = j->next)
-               args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+               args[i++] = xstrdup(merge_argument(j->item));
        args[i++] = "--";
        args[i++] = head_arg;
        for (j = remotes; j; j = j->next)
-               args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+               args[i++] = xstrdup(merge_argument(j->item));
        args[i] = NULL;
        ret = run_command_v_opt(args, RUN_GIT_CMD);
        strbuf_release(&buf);