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From: Junio C Hamano <gitster@pobox.com>
To: Stefan Beller <sbeller@google.com>
Cc: szeder.dev@gmail.com, email@benjaminfuchs.de,
	git@vger.kernel.org, sandals@crustytoothpaste.net,
	ville.skytta@iki.fi
Subject: Re: [PATCHv2] rev-parse: add --show-superproject-working-tree
Date: Tue, 07 Mar 2017 22:01:36 -0800
Message-ID: <xmqq60jk488v.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <20170308005615.20321-1-sbeller@google.com>

Stefan Beller <sbeller@google.com> writes:

> +			if (!strcmp(arg, "--show-superproject-working-tree")) {
> +				const char *superproject = get_superproject_working_tree();
> +				if (superproject)
> +					puts(superproject);
> +				continue;
> +			}

Returning the exact string of the path from the API function is
absolutely the right thing. I however have to wonder if rev-parse
need to do the c-quoting unless it is told to show pathnames in its
output without quoting (perhaps with "-z").  Paths from "rev-parse"
(like "--git-dir", "--show-toplevel", etc.) already are excempt from
the usual quoting rules, so doing puts() and nothing else is fine to
be consistent with the existing practice, but in the longer term, I
am sure we would need to revisit so that scripts can handle paths
with funny characters sensibly, but that would be a different topic
if existing ones like "--git-dir" are already unsafe.

>  			if (!strcmp(arg, "--show-prefix")) {
>  				if (prefix)
>  					puts(prefix);
> diff --git a/submodule.c b/submodule.c
> index 3b98766a6b..06473d3646 100644
> --- a/submodule.c
> +++ b/submodule.c
> @@ -1514,3 +1514,86 @@ void absorb_git_dir_into_superproject(const char *prefix,
>  		strbuf_release(&sb);
>  	}
>  }
> +
> +const char *get_superproject_working_tree(void)
> +{
> +...
> +	argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
> +			"ls-files", "--stage", "--full-name", "--", subpath, NULL);
> +	strbuf_reset(&sb);
> +...
> +	if (starts_with(sb.buf, "160000")) {
> +		int super_sub_len;
> +		int cwd_len = strlen(cwd);
> +		char *super_sub, *super_wt;
> +
> +		/*
> +		 * There is a superproject having this repo as a submodule.
> +		 * The format is <mode> SP <hash> SP <stage> TAB <full name> LF,
> +		 * First remove LF, then skip up to \t.
> +		 */

Looks more or less right but invoke "ls-files -z" and reading the \0
delimited output would be easier; otherwise you would have to worry
about c-unquoting the pathname when the submodule is bound at a path
with funny character (like a double-quote) in it.

  parent reply index

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-30 20:44 [PATCH 0/4] git-prompt.sh: Full patch for submodule indicator Benjamin Fuchs
2017-01-30 20:44 ` [PATCH 1/4] git-prompt.sh: add " Benjamin Fuchs
2017-01-30 23:48   ` Junio C Hamano
2017-01-31  0:10     ` Benjamin Fuchs
2017-01-31  3:11       ` Junio C Hamano
2017-02-06  4:23         ` Stefan Beller
2017-02-06  5:55           ` Jacob Keller
2017-02-06 10:13             ` Stefan Beller
2017-01-30 20:44 ` [PATCH 2/4] git-prompt.sh: rework of " Benjamin Fuchs
2017-01-30 20:44 ` [PATCH 4/4] git-prompt.sh: add tests for " Benjamin Fuchs
2017-01-31 18:32   ` SZEDER Gábor
2017-01-31 22:06     ` Junio C Hamano
2017-01-31 22:12       ` Stefan Beller
2017-03-07  3:45         ` [RFC PATCH] rev-parse: add --show-superproject-working-tree Stefan Beller
2017-03-07  5:13           ` Junio C Hamano
2017-03-07  7:16             ` Junio C Hamano
2017-03-07  7:23               ` Junio C Hamano
2017-03-07 18:44           ` Junio C Hamano
2017-03-07 20:40             ` Stefan Beller
2017-03-07 22:49               ` Junio C Hamano
2017-03-08  0:56                 ` [PATCHv2] " Stefan Beller
2017-03-08  1:30                   ` Junio C Hamano
2017-03-08  6:01                   ` Junio C Hamano [this message]
2017-03-08 19:20                     ` [PATCHv3] " Stefan Beller
2017-03-08 22:28                       ` Junio C Hamano
2017-03-08 23:07                         ` [PATCHv4] " Stefan Beller
2017-03-08 23:51                           ` Junio C Hamano
2017-03-17 22:28                           ` Jonathan Nieder
2017-03-17 22:51                             ` [PATCH] Documentation/git-worktree: use working tree for trees on the file system Stefan Beller
2017-03-17 22:55                               ` Jonathan Nieder
2017-03-17 23:04                                 ` Stefan Beller
2017-03-18 17:24                                   ` Junio C Hamano
2017-03-18  1:47                                 ` Junio C Hamano
2017-03-18  1:36                               ` Junio C Hamano
2017-03-20 17:29                                 ` Stefan Beller
2017-03-20 18:12                                   ` Junio C Hamano
2017-03-20 18:50                                     ` Jonathan Nieder
2017-03-20 19:22                                       ` [PATCH 0/2] use "working trees" instead of "worktree" in our API Stefan Beller
2017-03-20 19:22                                         ` [PATCH 1/2] git.c: introduce --working-tree superseding --work-tree Stefan Beller
2017-03-20 19:58                                           ` Jonathan Nieder
2017-03-20 19:22                                         ` [PATCH 2/2] revparse: introduce --is-inside-working-tree Stefan Beller
2017-03-20 20:00                                           ` Jonathan Nieder
2017-03-20 19:37                                         ` [PATCH 0/2] use "working trees" instead of "worktree" in our API Junio C Hamano
2017-03-21 10:37                                       ` [PATCH] Documentation/git-worktree: use working tree for trees on the file system Duy Nguyen
2017-03-21 15:48                                         ` Junio C Hamano
2017-03-23 17:06                                           ` Michael J Gruber
2017-03-23 17:55                                             ` Junio C Hamano
2017-03-25 12:07                                               ` Duy Nguyen
2017-04-07 13:59                                                 ` Michael J Gruber
2017-04-07 16:14                                                   ` Jacob Keller
2017-03-25 12:05                                           ` Duy Nguyen

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