Re: [PATCH] git-revert is one of the most misunderstood command in git, help users out.

> When git-revert has a file argument then redirect the user to what he
> probably meant.
> 
> Signed-off-by: Pierre Habouzit <madcoder@debian.org>
> ---
>  builtin-revert.c |   24 +++++++++++++++++-------
>  gitk             |    2 +-
>  2 files changed, 18 insertions(+), 8 deletions(-)
> 
> diff --git a/builtin-revert.c b/builtin-revert.c
> index 62ab1fa..9660048 100644
> --- a/builtin-revert.c
> +++ b/builtin-revert.c
> @@ -38,7 +38,7 @@ static const char *me;
>  
>  #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
>  
> -static void parse_args(int argc, const char **argv)
> +static void parse_args(int argc, const char **argv, const char *prefix)
>  {
>  	const char * const * usage_str =
>  		action == REVERT ?  revert_usage : cherry_pick_usage;
> @@ -58,8 +58,18 @@ static void parse_args(int argc, const char **argv)
>  		usage_with_options(usage_str, options);
>  	arg = argv[0];
>  
> -	if (get_sha1(arg, sha1))
> -		die ("Cannot find '%s'", arg);
> +	if (get_sha1(arg, sha1)) {
> +		struct stat st;
> +		const char *name;
> +
> +		name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
> +		if (!lstat(name, &st)) {
> +			die("Cannot find commit '%s', did you meant: "
> +				"git checkout HEAD -- '%s'", arg, arg);
> +		} else {
> +			die("Cannot find commit '%s'", arg);
> +		}
> +	}
>  	commit = (struct commit *)parse_object(sha1);
>  	if (!commit)
>  		die ("Could not find %s", sha1_to_hex(sha1));
> @@ -225,7 +235,7 @@ static int merge_recursive(const char *base_sha1,
>  	return run_command_v_opt(argv, RUN_COMMAND_NO_STDIN | RUN_GIT_CMD);
>  }
>  
> -static int revert_or_cherry_pick(int argc, const char **argv)
> +static int revert_or_cherry_pick(int argc, const char **argv, const char *prefix)
>  {
>  	unsigned char head[20];
>  	struct commit *base, *next, *parent;
> @@ -237,7 +247,7 @@ static int revert_or_cherry_pick(int argc, const char **argv)
>  	git_config(git_default_config);
>  	me = action == REVERT ? "revert" : "cherry-pick";
>  	setenv(GIT_REFLOG_ACTION, me, 0);
> -	parse_args(argc, argv);
> +	parse_args(argc, argv, prefix);
>  
>  	/* this is copied from the shell script, but it's never triggered... */
>  	if (action == REVERT && !no_replay)
> @@ -405,12 +415,12 @@ int cmd_revert(int argc, const char **argv, const char *prefix)
>  		edit = 1;
>  	no_replay = 1;
>  	action = REVERT;
> -	return revert_or_cherry_pick(argc, argv);
> +	return revert_or_cherry_pick(argc, argv, prefix);
>  }
>  
>  int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
>  {
>  	no_replay = 0;
>  	action = CHERRY_PICK;
> -	return revert_or_cherry_pick(argc, argv);
> +	return revert_or_cherry_pick(argc, argv, prefix);
>  }

> diff --git a/gitk b/gitk
> index 1da0b0a..ab8bab2 100755
> --- a/gitk
> +++ b/gitk
> @@ -1,6 +1,6 @@
>  #!/bin/sh
>  # Tcl ignores the next line -*- tcl -*- \
> -exec wish "$0" -- "$@"
> +exec wish8.5 "$0" -- "$@"
>  
>  # Copyright (C) 2005-2006 Paul Mackerras.  All rights reserved.
>  # This program is free software; it may be used, copied, modified
> -- 
> 1.5.3.5.1541.gd2b5c-dirty