home_config_paths(): let the caller ignore xdg path

diff --git a/builtin/config.c b/builtin/config.c
index de41ba50e9ca03d5348e407eaba44c2a93447938..9346894240c77a3120530af9e83c0eb12d3edc2f 100644 (file)
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -360,6 +360,9 @@ static int get_colorbool(int print)
 
 static void check_write(void)
 {
+       if (given_config_source.use_stdin)
+               die("writing to stdin is not supported");
+
        if (given_config_source.blob)
                die("writing config blobs is not supported");
 }
@@ -455,6 +458,20 @@ static int get_urlmatch(const char *var, const char *url)
        return 0;
 }
 
+static char *default_user_config(void)
+{
+       struct strbuf buf = STRBUF_INIT;
+       strbuf_addf(&buf,
+                   _("# This is Git's per-user configuration file.\n"
+                     "[core]\n"
+                     "# Please adapt and uncomment the following lines:\n"
+                     "#        user = %s\n"
+                     "#        email = %s\n"),
+                   ident_default_name(),
+                   ident_default_email());
+       return strbuf_detach(&buf, NULL);
+}
+
 int cmd_config(int argc, const char **argv, const char *prefix)
 {
        int nongit = !startup_info->have_repository;
@@ -472,6 +489,12 @@ int cmd_config(int argc, const char **argv, const char *prefix)
                usage_with_options(builtin_config_usage, builtin_config_options);
        }
 
+       if (given_config_source.file &&
+                       !strcmp(given_config_source.file, "-")) {
+               given_config_source.file = NULL;
+               given_config_source.use_stdin = 1;
+       }
+
        if (use_global_config) {
                char *user_config = NULL;
                char *xdg_config = NULL;
@@ -555,15 +578,28 @@ int cmd_config(int argc, const char **argv, const char *prefix)
                }
        }
        else if (actions == ACTION_EDIT) {
+               const char *config_file = given_config_source.file ?
+                       given_config_source.file : git_path("config");
                check_argc(argc, 0, 0);
                if (!given_config_source.file && nongit)
                        die("not in a git directory");
+               if (given_config_source.use_stdin)
+                       die("editing stdin is not supported");
                if (given_config_source.blob)
                        die("editing blobs is not supported");
                git_config(git_default_config, NULL);
-               launch_editor(given_config_source.file ?
-                             given_config_source.file : git_path("config"),
-                             NULL, NULL);
+               if (use_global_config) {
+                       int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
+                       if (fd) {
+                               char *content = default_user_config();
+                               write_str_in_full(fd, content);
+                               free(content);
+                               close(fd);
+                       }
+                       else if (errno != EEXIST)
+                               die_errno(_("cannot create configuration file %s"), config_file);
+               }
+               launch_editor(config_file, NULL, NULL);
        }
        else if (actions == ACTION_SET) {
                int ret;