From: "SZEDER Gábor" <szeder.dev@gmail.com>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: "Junio C Hamano" <gitster@pobox.com>,
"Matthew Coleman" <matt@1eanda.com>,
"Stephon Harris" <theonestep4@gmail.com>,
"Duy Nguyen" <pclouds@gmail.com>,
"Jakub Narębski" <jnareb@gmail.com>,
"Git mailing list" <git@vger.kernel.org>,
"Rick van Hattem" <wolph@wol.ph>,
"Dave Borowitz" <dborowitz@google.com>
Subject: Re: [PATCH] completion: correct zsh detection when run from git-completion.zsh (Re: [PATCH v2] completion: reduce overhead of clearing cached --options)
Date: Tue, 12 Jun 2018 11:48:35 +0200 [thread overview]
Message-ID: <CAM0VKjm7Nap_tH-0Nd_QxabEPDL=71sVifo8cqhjMkqZOERJTA@mail.gmail.com> (raw)
In-Reply-To: <20180611182053.GA20665@aiede.svl.corp.google.com>
On Mon, Jun 11, 2018 at 8:20 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:
> From: SZEDER Gábor <szeder.dev@gmail.com>
> Subject: completion: correct zsh detection when run from git-completion.zsh
>
> v2.18.0-rc0~90^2 (completion: reduce overhead of clearing cached
> --options, 2018-04-18) worked around a bug in bash's "set" builtin on
> MacOS by using compgen instead. It was careful to avoid breaking zsh
> by guarding this workaround with
>
> if [[ -n ${ZSH_VERSION-}} ]]
>
> Alas, this interacts poorly with git-completion.zsh's bash emulation:
>
> ZSH_VERSION='' . "$script"
>
> Correct it by instead using a new GIT_SOURCING_ZSH_COMPLETION shell
> variable to detect whether git-completion.bash is being sourced from
> git-completion.zsh. This way, the zsh variant is used both when run
> from zsh directly and when run via git-completion.zsh.
>
> Reproduction recipe:
>
> 1. cd git/contrib/completion && cp git-completion.zsh _git
> 2. Put the following in a new ~/.zshrc file:
>
> autoload -U compinit; compinit
> autoload -U bashcompinit; bashcompinit
> fpath=(~/src/git/contrib/completion $fpath)
>
> 3. Open zsh and "git <TAB>".
>
> With this patch:
> Triggers nice git-completion.bash based tab completion
>
> Without:
> contrib/completion/git-completion.bash:354: read-only variable: QISUFFIX
> zsh:12: command not found: ___main
> zsh:15: _default: function definition file not found
> _dispatch:70: bad math expression: operand expected at `/usr/bin/g...'
> Segmentation fault
Btw, even if ZSH were not to segfault, the resulting shell would be
next to useless. The thing is that 'compgen -v foo' is supposed to
list only variable names starting with 'foo', at least that's what it
does under Bash. In ZSH's Bash emulation, however, it lists _all_
variable names, including such fundamental env vars like PATH, HOME,
and IFS. So when ZSH took the wrong if branch and run that
unset $(compgen -v __gitcomp_builtin_)
then it would unset PATH and everything else as well.
next prev parent reply other threads:[~2018-06-12 9:48 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-05 3:10 [PATCH] specify encoding for sed command Stephon Harris
2018-04-05 6:53 ` Ævar Arnfjörð Bjarmason
2018-04-05 9:42 ` Eric Sunshine
2018-04-05 9:43 ` SZEDER Gábor
2018-04-10 7:18 ` Matt Coleman
2018-04-11 20:42 ` Matt Coleman
2018-04-12 22:12 ` Matthew Coleman
2018-04-13 0:01 ` SZEDER Gábor
2018-04-13 3:00 ` Matthew Coleman
2018-04-13 10:30 ` [PATCH] completion: reduce overhead of clearing cached --options SZEDER Gábor
2018-04-13 21:44 ` Jakub Narebski
2018-04-13 22:23 ` SZEDER Gábor
2018-04-14 13:27 ` Jakub Narebski
2018-04-16 18:23 ` Jacob Keller
2018-04-16 20:35 ` Matthew Coleman
2018-04-16 5:10 ` Junio C Hamano
2018-04-16 13:15 ` SZEDER Gábor
2018-04-16 13:29 ` Jakub Narębski
2018-04-16 22:43 ` Junio C Hamano
2018-04-17 22:02 ` [PATCH v2] " SZEDER Gábor
2018-04-17 23:45 ` Junio C Hamano
2018-05-07 15:05 ` Matthew Coleman
2018-05-08 2:28 ` Todd Zullinger
2018-05-08 3:28 ` Junio C Hamano
2018-06-07 5:48 ` Jonathan Nieder
2018-06-07 12:07 ` Dave Borowitz
2018-06-07 12:41 ` Rick van Hattem
2018-06-08 21:16 ` SZEDER Gábor
2018-06-08 21:23 ` Jonathan Nieder
2018-06-08 21:41 ` SZEDER Gábor
2018-06-08 21:52 ` Jonathan Nieder
2018-06-08 21:58 ` SZEDER Gábor
2018-06-11 17:53 ` Junio C Hamano
2018-06-11 18:20 ` [PATCH] completion: correct zsh detection when run from git-completion.zsh (Re: [PATCH v2] completion: reduce overhead of clearing cached --options) Jonathan Nieder
2018-06-12 8:46 ` SZEDER Gábor
2018-06-12 9:48 ` SZEDER Gábor [this message]
2018-06-12 9:51 ` Rick van Hattem
2018-04-08 23:17 ` [PATCH] specify encoding for sed command Junio C Hamano
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