format-patch: do not let its diff-options affect --range-diff

diff --git a/builtin/am.c b/builtin/am.c
index 3ee9a9d2a92aaa0e9716719640deaec7e260c811..8f27f3375b1e92f2ef026e0a1530ca8b6b3235bf 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -260,32 +260,6 @@ static int read_state_file(struct strbuf *sb, const struct am_state *state,
        die_errno(_("could not read '%s'"), am_path(state, file));
 }
 
-/**
- * Take a series of KEY='VALUE' lines where VALUE part is
- * sq-quoted, and append <KEY, VALUE> at the end of the string list
- */
-static int parse_key_value_squoted(char *buf, struct string_list *list)
-{
-       while (*buf) {
-               struct string_list_item *item;
-               char *np;
-               char *cp = strchr(buf, '=');
-               if (!cp)
-                       return -1;
-               np = strchrnul(cp, '\n');
-               *cp++ = '\0';
-               item = string_list_append(list, buf);
-
-               buf = np + (*np == '\n');
-               *np = '\0';
-               cp = sq_dequote(cp);
-               if (!cp)
-                       return -1;
-               item->util = xstrdup(cp);
-       }
-       return 0;
-}
-
 /**
  * Reads and parses the state directory's "author-script" file, and sets
  * state->author_name, state->author_email and state->author_date accordingly.
@@ -302,42 +276,16 @@ static int parse_key_value_squoted(char *buf, struct string_list *list)
  * script, and thus if the file differs from what this function expects, it is
  * better to bail out than to do something that the user does not expect.
  */
-static int read_author_script(struct am_state *state)
+static int read_am_author_script(struct am_state *state)
 {
        const char *filename = am_path(state, "author-script");
-       struct strbuf buf = STRBUF_INIT;
-       struct string_list kv = STRING_LIST_INIT_DUP;
-       int retval = -1; /* assume failure */
-       int fd;
 
        assert(!state->author_name);
        assert(!state->author_email);
        assert(!state->author_date);
 
-       fd = open(filename, O_RDONLY);
-       if (fd < 0) {
-               if (errno == ENOENT)
-                       return 0;
-               die_errno(_("could not open '%s' for reading"), filename);
-       }
-       strbuf_read(&buf, fd, 0);
-       close(fd);
-       if (parse_key_value_squoted(buf.buf, &kv))
-               goto finish;
-
-       if (kv.nr != 3 ||
-           strcmp(kv.items[0].string, "GIT_AUTHOR_NAME") ||
-           strcmp(kv.items[1].string, "GIT_AUTHOR_EMAIL") ||
-           strcmp(kv.items[2].string, "GIT_AUTHOR_DATE"))
-               goto finish;
-       state->author_name = kv.items[0].util;
-       state->author_email = kv.items[1].util;
-       state->author_date = kv.items[2].util;
-       retval = 0;
-finish:
-       string_list_clear(&kv, !!retval);
-       strbuf_release(&buf);
-       return retval;
+       return read_author_script(filename, &state->author_name,
+                                 &state->author_email, &state->author_date, 1);
 }
 
 /**
@@ -411,7 +359,7 @@ static void am_load(struct am_state *state)
                BUG("state file 'last' does not exist");
        state->last = strtol(sb.buf, NULL, 10);
 
-       if (read_author_script(state) < 0)
+       if (read_am_author_script(state) < 0)
                die(_("could not parse author script"));
 
        read_commit_msg(state);
@@ -2165,7 +2113,9 @@ static int parse_opt_patchformat(const struct option *opt, const char *arg, int
 {
        int *opt_value = opt->value;
 
-       if (!strcmp(arg, "mbox"))
+       if (unset)
+               *opt_value = PATCH_FORMAT_UNKNOWN;
+       else if (!strcmp(arg, "mbox"))
                *opt_value = PATCH_FORMAT_MBOX;
        else if (!strcmp(arg, "stgit"))
                *opt_value = PATCH_FORMAT_STGIT;