refactor userdiff textconv code

diff --git a/builtin-tag.c b/builtin-tag.c
index c2cca6cb6dc46a221c65092d7c419445d6442b5f..b13fa34d8c59a9226599ba10b4d679f41ad230b0 100644 (file)
--- a/builtin-tag.c
+++ b/builtin-tag.c
@@ -23,59 +23,6 @@ static const char * const git_tag_usage[] = {
 
 static char signingkey[1000];
 
-void launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
-{
-       const char *editor, *terminal;
-
-       editor = getenv("GIT_EDITOR");
-       if (!editor && editor_program)
-               editor = editor_program;
-       if (!editor)
-               editor = getenv("VISUAL");
-       if (!editor)
-               editor = getenv("EDITOR");
-
-       terminal = getenv("TERM");
-       if (!editor && (!terminal || !strcmp(terminal, "dumb"))) {
-               fprintf(stderr,
-               "Terminal is dumb but no VISUAL nor EDITOR defined.\n"
-               "Please supply the message using either -m or -F option.\n");
-               exit(1);
-       }
-
-       if (!editor)
-               editor = "vi";
-
-       if (strcmp(editor, ":")) {
-               size_t len = strlen(editor);
-               int i = 0;
-               const char *args[6];
-               struct strbuf arg0;
-
-               strbuf_init(&arg0, 0);
-               if (strcspn(editor, "$ \t'") != len) {
-                       /* there are specials */
-                       strbuf_addf(&arg0, "%s \"$@\"", editor);
-                       args[i++] = "sh";
-                       args[i++] = "-c";
-                       args[i++] = arg0.buf;
-               }
-               args[i++] = editor;
-               args[i++] = path;
-               args[i] = NULL;
-
-               if (run_command_v_opt_cd_env(args, 0, NULL, env))
-                       die("There was a problem with the editor %s.", editor);
-               strbuf_release(&arg0);
-       }
-
-       if (!buffer)
-               return;
-       if (strbuf_read_file(buffer, path, 0) < 0)
-               die("could not read message file '%s': %s",
-                   path, strerror(errno));
-}
-
 struct tag_filter {
        const char *pattern;
        int lines;
@@ -348,7 +295,11 @@ static void create_tag(const unsigned char *object, const char *tag,
                        write_or_die(fd, tag_template, strlen(tag_template));
                close(fd);
 
-               launch_editor(path, buf, NULL);
+               if (launch_editor(path, buf, NULL)) {
+                       fprintf(stderr,
+                       "Please supply the message using either -m or -F option.\n");
+                       exit(1);
+               }
 
                unlink(path);
                free(path);
@@ -387,7 +338,7 @@ static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 
 int cmd_tag(int argc, const char **argv, const char *prefix)
 {
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        unsigned char object[20], prev[20];
        char ref[PATH_MAX];
        const char *object_ref, *tag;
@@ -395,7 +346,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 
        int annotate = 0, sign = 0, force = 0, lines = 0,
                list = 0, delete = 0, verify = 0;
-       char *msgfile = NULL, *keyid = NULL;
+       const char *msgfile = NULL, *keyid = NULL;
        struct msg_arg msg = { 0, STRBUF_INIT };
        struct option options[] = {
                OPT_BOOLEAN('l', NULL, &list, "list tag names"),
@@ -421,6 +372,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        git_config(git_tag_config, NULL);
 
        argc = parse_options(argc, argv, options, git_tag_usage, 0);
+       msgfile = parse_options_fix_filename(prefix, msgfile);
 
        if (keyid) {
                sign = 1;
@@ -436,7 +388,6 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        if (verify)
                return for_each_tag_name(argv, verify_tag);
 
-       strbuf_init(&buf, 0);
        if (msg.given || msgfile) {
                if (msg.given && msgfile)
                        die("only one -F or -m option is allowed.");