Windows: Compute the fallback for exec_path from the program invocation.

diff --git a/git.c b/git.c
index c4e4644b30e184e6496fb5a4877f3141488f8f44..871b93ca7e5eb9e919f0d55e169f8864df5e8a6d 100644 (file)
--- a/git.c
+++ b/git.c
@@ -6,6 +6,9 @@
 const char git_usage_string[] =
        "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
 
+const char git_more_info_string[] =
+       "See 'git help COMMAND' for more information on a specific command.";
+
 static int handle_options(const char*** argv, int* argc, int* envchanged)
 {
        int handled = 0;
@@ -283,9 +286,10 @@ static void handle_internal_command(int argc, const char **argv)
                { "checkout-index", cmd_checkout_index,
                        RUN_SETUP | NEED_WORK_TREE},
                { "check-ref-format", cmd_check_ref_format },
-               { "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE },
+               { "check-attr", cmd_check_attr, RUN_SETUP },
                { "cherry", cmd_cherry, RUN_SETUP },
                { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
+               { "clone", cmd_clone },
                { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
                { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
                { "commit-tree", cmd_commit_tree, RUN_SETUP },
@@ -293,7 +297,7 @@ static void handle_internal_command(int argc, const char **argv)
                { "count-objects", cmd_count_objects, RUN_SETUP },
                { "describe", cmd_describe, RUN_SETUP },
                { "diff", cmd_diff },
-               { "diff-files", cmd_diff_files },
+               { "diff-files", cmd_diff_files, RUN_SETUP },
                { "diff-index", cmd_diff_index, RUN_SETUP },
                { "diff-tree", cmd_diff_tree, RUN_SETUP },
                { "fast-export", cmd_fast_export, RUN_SETUP },
@@ -347,7 +351,7 @@ static void handle_internal_command(int argc, const char **argv)
                { "shortlog", cmd_shortlog, USE_PAGER },
                { "show-branch", cmd_show_branch, RUN_SETUP },
                { "show", cmd_show, RUN_SETUP | USE_PAGER },
-               { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
+               { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE | USE_PAGER },
                { "stripspace", cmd_stripspace },
                { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
                { "tag", cmd_tag, RUN_SETUP },
@@ -365,6 +369,16 @@ static void handle_internal_command(int argc, const char **argv)
                { "pack-refs", cmd_pack_refs, RUN_SETUP },
        };
        int i;
+       static const char ext[] = STRIP_EXTENSION;
+
+       if (sizeof(ext) > 1) {
+               i = strlen(argv[0]) - strlen(ext);
+               if (i > 0 && !strcmp(argv[0] + i, ext)) {
+                       char *argv0 = strdup(argv[0]);
+                       argv[0] = cmd = argv0;
+                       argv0[i] = '\0';
+               }
+       }
 
        /* Turn "git cmd --help" into "git help cmd" */
        if (argc > 1 && !strcmp(argv[1], "--help")) {
@@ -382,8 +396,8 @@ static void handle_internal_command(int argc, const char **argv)
 
 int main(int argc, const char **argv)
 {
-       const char *cmd = argv[0] ? argv[0] : "git-help";
-       char *slash = strrchr(cmd, '/');
+       const char *cmd = argv[0] && *argv[0] ? argv[0] : "git-help";
+       char *slash = (char *)cmd + strlen(cmd);
        const char *cmd_path = NULL;
        int done_alias = 0;
 
@@ -392,7 +406,10 @@ int main(int argc, const char **argv)
         * name, and the dirname as the default exec_path
         * if we don't have anything better.
         */
-       if (slash) {
+       do
+               --slash;
+       while (cmd <= slash && !is_dir_sep(*slash));
+       if (cmd <= slash) {
                *slash++ = 0;
                cmd_path = cmd;
                cmd = slash;
@@ -426,6 +443,7 @@ int main(int argc, const char **argv)
                /* The user didn't specify a command; give them help */
                printf("usage: %s\n\n", git_usage_string);
                list_common_cmds_help();
+               printf("\n%s\n", git_more_info_string);
                exit(1);
        }
        cmd = argv[0];