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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: [RFC PATCH] rev-parse: add --show-superproject-working-tree
Date: Mon, 06 Mar 2017 21:13:40 -0800
Message-ID: <xmqqvarly8hn.fsf@junio-linux.mtv.corp.google.com> (raw)
In-Reply-To: <20170307034553.10770-1-sbeller@google.com>

Stefan Beller <sbeller@google.com> writes:

> diff --git a/submodule.c b/submodule.c
> index 3b98766a6b..a63aef2c6b 100644
> --- a/submodule.c
> +++ b/submodule.c
> @@ -1514,3 +1514,90 @@ void absorb_git_dir_into_superproject(const char *prefix,
>  		strbuf_release(&sb);
>  	}
>  }

Please have a comment here what this function expects (e.g. it is
called after we ran repository discovery and $cwd is at the root of
the working tree of the current project, we _know_ we have a working
tree, etc.).

> +
> +static int superproject_exists(void)
> +{
> +	struct child_process cp = CHILD_PROCESS_INIT;
> +	struct strbuf sb = STRBUF_INIT;
> +	struct strbuf buf = STRBUF_INIT;
> +	const char *one_up = real_path_if_valid("../");
> +	const char *dirname;
> +	int code, has_superproject = 0;
> +
> +	if (!one_up)
> +		/* At the root of the file system. */
> +		return 0;

Hmph.  I would have expected that "/../" would be the same as "/".

> +	dirname = relative_path(xgetcwd(), one_up, &sb);

So, the idea is we start at the root level of the current project's
working tree, and we go up one level, then we know the last component
of the path our submodule is bound at in the superproject.

> +	prepare_submodule_repo_env(&cp.env_array);
> +	argv_array_pop(&cp.env_array);
> +	argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
> +			"ls-tree", "HEAD", "--", dirname, NULL);

This would ask our superproject what is at the "dirname" in its
HEAD.  Two possible issues:

 - Shouldn't that be looking at its index instead?  It would be more
   correct for unborn branch case, and new or moved submodule case.

 - If our submodule is bound at path sub/dir in the superproject,
   the relative-path thing above would get "dir" and this ls-tree
   ends up asking what is at "dir", but the question you really want
   to ask is what is at "sub/dir", isn't it?

> +const char *get_superproject_working_tree()

const char *get_superproject_working_tree(void)

  reply index

Thread overview: 53+ 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
2017-01-31 18:06   ` SZEDER Gábor
2017-01-30 20:44 ` [PATCH 3/4] git-prompt.sh: fix for submodule 'dirty' indicator Benjamin Fuchs
2017-01-30 20:44 ` [PATCH 4/4] git-prompt.sh: add tests for submodule indicator 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 [this message]
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
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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