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話題の jq を便利に使う zsh の補完ファイルを書いた

Last updated at Posted at 2013-07-13

jq というコマンドがある。JSON をいい感じに読みやすくしてくれるコマンドラインツールだ。

Web の API を呼び出してテストするときとかに便利。

でも --help をつけてもヘルプメッセージがしょぼい感じで、使い方がよく分からなかった。なので zsh 補完ファイルを書いた。これでさくさくオプション指定できるようになる。

jq_zsh.png

zsh-users/zsh-completions (https://github.com/zsh-users/zsh-completions) に pull request を送ったのでそのうち取り込まれると思う。

自分でインストールして使う方法は以下。

補完ファイルをダウンロードする。

Gist に貼りつけた ので、そこから補完ファイルをダウンロードする。ファイル名は _jq にする。

_jq を適当な場所に配置する。

保存場所はどこでも良い。今回は $HOME/zsh-completions 以下に配置したとする。

~/.zshrc に以下を書く

.zshrc に以下を追記する。compinit を呼び出す前に書かないといけないので注意。

# これは compinit の前に書く
if [[ -d "$HOME/zsh-completions" ]]; then
    fpath=("$HOME/zsh-completions" $fpath)
fi

~/.zshrc を再読み込みする

% source ~/.zshrc

これで OK

最後に補完ファイルをここにも貼り付けておく。わりとシンプルな感じなので、他のコマンドの補完を書くときでも参考になると思う。

#compdef jq
# ------------------------------------------------------------------------------
# Copyright (c) 2011 Github zsh-users - http://github.com/zsh-users
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the zsh-users nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL ZSH-USERS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# ------------------------------------------------------------------------------
# Description
# -----------
#
#  Completion script for jq (http://stedolan.github.io/jq/)
#
# ------------------------------------------------------------------------------
# Authors
# -------
#
#  * Hideaki Miyake (https://github.com/mollifier)
#
# ------------------------------------------------------------------------------

declare -a opts args
args=(
  '(-h --help)'{-h,--help}'[display help information]'
  '(-V --version)'{-V,--version}'[display version information]'
  '(-s --slurp)'{-s,--slurp}'[run the filter just once]'
  '(-R --raw-input)'{-R,--raw-input}'[parse the input as not JSON but string]'
  '(-n --null-input)'{-n,--null-input}'[run the filter using null as the input]'
  '(-c --compact-output)'{-c,--compact-output}'[compact output]' \
  '(-C --color-output)'{-C,--color-output}'[colorize the output even if writing to a pipe or a file]'
  '(-M --monochrome-output)'{-M,--monochrome-output}'[not colorize the output]'
  '(-a --ascii-output)'{-a,--ascii-output}'[output with pure ASCII character]'
  '(-r --raw-output)'{-r,--raw-output}'[not format string result as a JSON string with quotes]'
  '--arg[passes a value to the jq program, e.g. --arg foo bar]:jq variable: '
  '1: :_guard "^-*" pattern'
  '*:files:->file'
)
local curcontext=$curcontext state line ret=1
declare -A opt_args

_arguments -C $opts \
  $args && ret=0

case $state in
  file)
    _files && ret=0
    ;;
esac

return $ret

# Local Variables:
# mode: Shell-Script
# sh-indentation: 2
# indent-tabs-mode: nil
# sh-basic-offset: 2
# End:
# vim: ft=zsh sw=2 ts=2 et
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