From: Phillip Wood <phillip.wood123@gmail.com>
Date: Tue, 05 Nov 2019 16:14:08 GMT
Subject: Re: [PATCH 3/5] reset: support the --pathspec-from-file option
Message-ID: <3cee48dd-15bb-1bec-6d23-d05cce0f4eb1@gmail.com>
In-Reply-To: <8d9f1fbc18346144a0c866a59891b652dcfe9b7f.1572895605.git.gitgitgadget@gmail.com>

Hi Alexandr

On 04/11/2019 19:26, Alexandr Miloslavskiy via GitGitGadget wrote:
> From: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
> [...]
> diff --git a/builtin/reset.c b/builtin/reset.c
> index fdd572168b..0eaa6b0bca 100644
> --- a/builtin/reset.c
> +++ b/builtin/reset.c
> @@ -31,6 +31,7 @@
>   static const char * const git_reset_usage[] = {
>   	N_("git reset [--mixed | --soft | --hard | --merge | --keep] [-q] [<commit>]"),
>   	N_("git reset [-q] [<tree-ish>] [--] <paths>..."),
> +	N_("git reset [-q] [--pathspec-from-file [--pathspec-file-null]] [<tree-ish>]"),
>   	N_("git reset --patch [<tree-ish>] [--] [<paths>...]"),
>   	NULL
>   };
> @@ -284,8 +285,8 @@ static int git_reset_config(const char *var, const char *value, void *cb)
>   int cmd_reset(int argc, const char **argv, const char *prefix)
>   {
>   	int reset_type = NONE, update_ref_status = 0, quiet = 0;
> -	int patch_mode = 0, unborn;
> -	const char *rev;
> +	int patch_mode = 0, pathspec_file_null = 0, unborn;
> +	const char *rev, *pathspec_from_file = NULL;
>   	struct object_id oid;
>   	struct pathspec pathspec;
>   	int intent_to_add = 0;
> @@ -306,6 +307,10 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
>   		OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")),
>   		OPT_BOOL('N', "intent-to-add", &intent_to_add,
>   				N_("record only the fact that removed paths will be added later")),
> +		OPT_FILENAME(0, "pathspec-from-file", &pathspec_from_file,
> +				N_("read pathspecs from file")),
> +		OPT_BOOL(0, "pathspec-file-null", &pathspec_file_null,
> +				N_("with --pathspec-from-file, pathspecs are separated with NUL character")),

One thing I forgot to mention before is that if you're going to add 
these options to a number of commands then maybe it is worth defining a 
macro for each one in parse-options.h. There are a couple of examples of 
this at the end of that file.

Best Wishes

Phillip

>   		OPT_END()
>   	};
>   
> @@ -316,6 +321,19 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
>   						PARSE_OPT_KEEP_DASHDASH);
>   	parse_args(&pathspec, argv, prefix, patch_mode, &rev);
>   
> +	if (pathspec_from_file) {
> +		if (patch_mode)
> +			die(_("--pathspec-from-file is incompatible with --patch"));
> +
> +		if (pathspec.nr)
> +			die(_("--pathspec-from-file is incompatible with path arguments"));
> +
> +		parse_pathspec_file(&pathspec, 0,
> +				    PATHSPEC_PREFER_FULL,
> +				    prefix, pathspec_from_file, pathspec_file_null);
> +	} else if (pathspec_file_null)
> +		die(_("--pathspec-file-null requires --pathspec-from-file"));
> +
>   	unborn = !strcmp(rev, "HEAD") && get_oid("HEAD", &oid);
>   	if (unborn) {
>   		/* reset on unborn branch: treat as reset to empty tree */
> diff --git a/t/t7107-reset-pathspec-file.sh b/t/t7107-reset-pathspec-file.sh
> new file mode 100755
> index 0000000000..cf7f085ad5
> --- /dev/null
> +++ b/t/t7107-reset-pathspec-file.sh
> @@ -0,0 +1,126 @@
> +#!/bin/sh
> +
> +test_description='reset --pathspec-from-file'
> +
> +. ./test-lib.sh
> +
> +cat > expect.a <<EOF
> + D fileA.t
> +EOF
> +
> +cat > expect.ab <<EOF
> + D fileA.t
> + D fileB.t
> +EOF
> +
> +cat > expect.a_bc_d <<EOF
> +D  fileA.t
> + D fileB.t
> + D fileC.t
> +D  fileD.t
> +EOF
> +
> +test_expect_success setup '
> +	echo A >fileA.t &&
> +	echo B >fileB.t &&
> +	echo C >fileC.t &&
> +	echo D >fileD.t &&
> +	git add . &&
> +	git commit --include . -m "Commit" &&
> +	checkpoint=$(git rev-parse --verify HEAD)
> +'
> +
> +restore_checkpoint () {
> +	git reset --hard "$checkpoint"
> +}
> +
> +verify_state () {
> +	git status --porcelain -- fileA.t fileB.t fileC.t fileD.t >actual &&
> +	test_cmp "$1" actual
> +}
> +
> +test_expect_success '--pathspec-from-file from stdin' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t &&
> +	echo fileA.t | git reset --pathspec-from-file=- &&
> +
> +	verify_state expect.a
> +'
> +
> +test_expect_success '--pathspec-from-file from file' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t &&
> +	echo fileA.t >list &&
> +	git reset --pathspec-from-file=list &&
> +
> +	verify_state expect.a
> +'
> +
> +test_expect_success 'NUL delimiters' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t fileB.t &&
> +	printf fileA.tQfileB.t | q_to_nul | git reset --pathspec-from-file=- --pathspec-file-null &&
> +
> +	verify_state expect.ab
> +'
> +
> +test_expect_success 'LF delimiters' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t fileB.t &&
> +	printf "fileA.t\nfileB.t" | git reset --pathspec-from-file=- &&
> +
> +	verify_state expect.ab
> +'
> +
> +test_expect_success 'CRLF delimiters' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t fileB.t &&
> +	printf "fileA.t\r\nfileB.t" | git reset --pathspec-from-file=- &&
> +
> +	verify_state expect.ab
> +'
> +
> +test_expect_success 'quotes' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t &&
> +	printf "\"file\\101.t\"" | git reset --pathspec-from-file=- &&
> +
> +	verify_state expect.a
> +'
> +
> +test_expect_success 'quotes not compatible with --pathspec-file-null' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t &&
> +	printf "\"file\\101.t\"" >list &&
> +	# Note: "git reset" has not yet learned to fail on wrong pathspecs
> +	git reset --pathspec-from-file=list --pathspec-file-null &&
> +	
> +	test_must_fail verify_state expect.a
> +'
> +
> +test_expect_success '--pathspec-from-file is not compatible with --soft --hard' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t &&
> +	echo fileA.t >list &&
> +	test_must_fail git reset --soft --pathspec-from-file=list &&
> +	test_must_fail git reset --hard --pathspec-from-file=list
> +'
> +
> +test_expect_success 'only touches what was listed' '
> +	restore_checkpoint &&
> +
> +	git rm fileA.t fileB.t fileC.t fileD.t &&
> +	printf "fileB.t\nfileC.t" | git reset --pathspec-from-file=- &&
> +
> +	verify_state expect.a_bc_d
> +'
> +
> +test_done
>