From: David Aguilar <davvid@gmail.com>
To: Denton Liu <liu.denton@gmail.com>
Cc: Git Mailing List <git@vger.kernel.org>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Jeff Hostetler <git@jeffhostetler.com>,
Eric Sunshine <sunshine@sunshineco.com>,
Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v4 3/6] mergetool: use get_merge_tool function
Date: Sun, 28 Apr 2019 16:52:56 -0700 [thread overview]
Message-ID: <20190428235256.GA6418@gmail.com> (raw)
In-Reply-To: <ff83d25ff2d0b9585b52c7e28cd7b93292b5304d.1556185345.git.liu.denton@gmail.com>
On Thu, Apr 25, 2019 at 02:54:39AM -0700, Denton Liu wrote:
> In git-mergetool, the logic for getting which merge tool to use is
> duplicated in git-mergetool--lib, except for the fact that it needs to
> know whether the tool was guessed or not.
>
> Rewrite `get_merge_tool` to return whether or not the tool was guessed
> through the return code and make git-mergetool call this function
> instead of duplicating the logic. Note that 1 was chosen to be the
> return code of when a tool is guessed because it seems like a slightly
> more abnormal condition than getting a tool that's explicitly specified
> but this is completely arbitrary.
>
> Also, let `$GIT_MERGETOOL_GUI` be set to determine whether or not the
> guitool will be selected.
>
> This change is not completely backwards compatible as there may be
> external users of git-mergetool--lib. However, only one user,
> git-diffall[1], was found from searching GitHub and Google. It seems
> very unlikely that there exists an external caller that would take into
> account the return code of `get_merge_tool` as it would always return 0
> before this change so this change probably does not affect any external
> users.
>
> [1]: https://github.com/thenigan/git-diffall
>
> Signed-off-by: Denton Liu <liu.denton@gmail.com>
The author of git-diffall approached the list some time ago and his
contribution resulted in "git difftool --dir-diff".
These days we would probably encourage users to use the difftool
built-in feature rather than "diffall", but thank you for your
careful consideration against breaking external scripts.
Maybe we can submit a PR against the diffall repo mentioning
the backstory so that new users are pointed to the main tool.
> diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
> index 83bf52494c..68ff26a0f7 100644
> --- a/git-mergetool--lib.sh
> +++ b/git-mergetool--lib.sh
> @@ -403,14 +403,17 @@ get_merge_tool_path () {
> }
>
> get_merge_tool () {
> + not_guessed=true
Tiny nit; I find double-negatives hard to understand. Maybe rename this
to "is_guessed" and flip the logic below so that we can keep the
variable named as a positive flag?
> # Check if a merge tool has been configured
> - merge_tool=$(get_configured_merge_tool)
> + merge_tool=$(get_configured_merge_tool $GIT_MERGETOOL_GUI)
> # Try to guess an appropriate merge tool if no tool has been set.
> if test -z "$merge_tool"
> then
> merge_tool=$(guess_merge_tool) || exit
> + not_guessed=false
> fi
> echo "$merge_tool"
> + test "$not_guessed" = true
> }
--
David
next prev parent reply other threads:[~2019-04-28 23:53 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-22 5:07 [PATCH 0/5] difftool and mergetool improvements Denton Liu
2019-04-22 5:07 ` [PATCH 1/5] t7610: add mergetool --gui tests Denton Liu
2019-04-22 5:07 ` [PATCH 2/5] mergetool: use get_merge_tool function Denton Liu
2019-04-22 7:07 ` Eric Sunshine
2019-04-22 8:35 ` Denton Liu
2019-04-22 5:07 ` [PATCH 3/5] mergetool: fallback to tool when guitool unavailable Denton Liu
2019-04-22 5:07 ` [PATCH 4/5] difftool: make --gui, --tool and --extcmd exclusive Denton Liu
2019-04-22 7:03 ` Eric Sunshine
2019-04-22 5:07 ` [PATCH 5/5] difftool: fallback on merge.guitool Denton Liu
2019-04-22 18:18 ` Jeff Hostetler
2019-04-22 18:33 ` Denton Liu
2019-04-23 8:53 ` [PATCH v2 0/5] difftool and mergetool improvements Denton Liu
2019-04-23 8:53 ` [PATCH v2 1/5] t7610: add mergetool --gui tests Denton Liu
2019-04-24 7:07 ` Junio C Hamano
2019-04-23 8:54 ` [PATCH v2 2/5] mergetool: use get_merge_tool_guessed function Denton Liu
2019-04-24 7:27 ` Junio C Hamano
2019-04-23 8:54 ` [PATCH v2 3/5] mergetool: fallback to tool when guitool unavailable Denton Liu
2019-04-23 8:54 ` [PATCH v2 4/5] difftool: make --gui, --tool and --extcmd mutually exclusive Denton Liu
2019-04-23 8:54 ` [PATCH v2 5/5] difftool: fallback on merge.guitool Denton Liu
2019-04-24 22:46 ` [PATCH v3 0/6] difftool and mergetool improvements Denton Liu
2019-04-24 22:46 ` [PATCH v3 1/6] t7610: unsuppress output Denton Liu
2019-04-25 2:31 ` Junio C Hamano
2019-04-24 22:46 ` [PATCH v3 2/6] t7610: add mergetool --gui tests Denton Liu
2019-04-24 22:47 ` [PATCH v3 3/6] mergetool: use get_merge_tool function Denton Liu
2019-04-25 2:36 ` Junio C Hamano
2019-04-24 22:47 ` [PATCH v3 4/6] mergetool: fallback to tool when guitool unavailable Denton Liu
2019-04-25 3:02 ` Junio C Hamano
2019-04-25 5:16 ` Denton Liu
2019-04-24 22:47 ` [PATCH v3 5/6] difftool: make --gui, --tool and --extcmd mutually exclusive Denton Liu
2019-04-24 22:47 ` [PATCH v3 6/6] difftool: fallback on merge.guitool Denton Liu
2019-04-25 3:10 ` Junio C Hamano
2019-04-25 9:54 ` [PATCH v4 0/6] difftool and mergetool improvements Denton Liu
2019-04-25 9:54 ` [PATCH v4 1/6] t7610: unsuppress output Denton Liu
2019-04-25 9:54 ` [PATCH v4 2/6] t7610: add mergetool --gui tests Denton Liu
2019-04-25 9:54 ` [PATCH v4 3/6] mergetool: use get_merge_tool function Denton Liu
2019-04-28 23:52 ` David Aguilar [this message]
2019-04-25 9:54 ` [PATCH v4 4/6] mergetool: fallback to tool when guitool unavailable Denton Liu
2019-04-28 23:56 ` David Aguilar
2019-04-25 9:54 ` [PATCH v4 5/6] difftool: make --gui, --tool and --extcmd mutually exclusive Denton Liu
2019-04-25 9:54 ` [PATCH v4 6/6] difftool: fallback on merge.guitool Denton Liu
2019-04-29 6:20 ` [PATCH v5 0/7] difftool and mergetool improvements Denton Liu
2019-04-29 6:21 ` [PATCH v5 1/7] t7610: unsuppress output Denton Liu
2019-04-29 6:21 ` [PATCH v5 2/7] t7610: add mergetool --gui tests Denton Liu
2019-04-29 6:21 ` [PATCH v5 3/7] mergetool: use get_merge_tool function Denton Liu
2019-04-29 6:21 ` [PATCH v5 4/7] mergetool--lib: create gui_mode function Denton Liu
2019-04-29 6:21 ` [PATCH v5 5/7] mergetool: fallback to tool when guitool unavailable Denton Liu
2019-04-29 6:21 ` [PATCH v5 6/7] difftool: make --gui, --tool and --extcmd mutually exclusive Denton Liu
2019-04-29 6:21 ` [PATCH v5 7/7] difftool: fallback on merge.guitool Denton Liu
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