Merge branch 'jc/maint-1.6.1-checkout-m-custom-merge' into maint

[git.git] / builtin-archive.c

diff --git a/builtin-archive.c b/builtin-archive.c
index 12351e9dd5c481fddc8db07c00a211b4620250bd..faf4554d5edbb21dbd043daec669bc684bf056cc 100644 (file)
--- a/builtin-archive.c
+++ b/builtin-archive.c
@@ -67,7 +67,7 @@ static const char *format_from_name(const char *filename)
                return NULL;
        ext++;
        if (!strcasecmp(ext, "zip"))
-               return "zip";
+               return "--format=zip";
        return NULL;
 }
 
@@ -81,7 +81,7 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
        const char *exec = "git-upload-archive";
        const char *output = NULL;
        const char *remote = NULL;
-       const char *format = NULL;
+       const char *format_option = NULL;
        struct option local_opts[] = {
                OPT_STRING('o', "output", &output, "file",
                        "write the archive to this file"),
@@ -89,30 +89,32 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
                        "retrieve the archive from remote repository <repo>"),
                OPT_STRING(0, "exec", &exec, "cmd",
                        "path to the remote git-upload-archive command"),
-               OPT_STRING(0, "format", &format, "fmt", "archive format"),
                OPT_END()
        };
-       char fmt_opt[32];
 
        argc = parse_options(argc, argv, prefix, local_opts, NULL,
                             PARSE_OPT_KEEP_ALL);
 
        if (output) {
                create_output_file(output);
-               if (!format)
-                       format = format_from_name(output);
+               format_option = format_from_name(output);
        }
 
-       if (format) {
-               sprintf(fmt_opt, "--format=%s", format);
-               /*
-                * This is safe because either --format and/or --output must
-                * have been given on the original command line if we get to
-                * this point, and parse_options() must have eaten at least
-                * one argument, i.e. we have enough room to append to argv[].
-                */
-               argv[argc++] = fmt_opt;
-               argv[argc] = NULL;
+       /*
+        * We have enough room in argv[] to muck it in place, because
+        * --output must have been given on the original command line
+        * if we get to this point, and parse_options() must have eaten
+        * it, i.e. we can add back one element to the array.
+        *
+        * We add a fake --format option at the beginning, with the
+        * format inferred from our output filename.  This way explicit
+        * --format options can override it, and the fake option is
+        * inserted before any "--" that might have been given.
+        */
+       if (format_option) {
+               memmove(argv + 2, argv + 1, sizeof(*argv) * argc);
+               argv[1] = format_option;
+               argv[++argc] = NULL;
        }
 
        if (remote)