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ShellScriptでフラグ

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Shellでフラグを使いたい!という場合、今まではTest文のANDチェーンで動かしていましたが、trueコマンドとfalseコマンドを見つけたのでメモります。

Terminal
local powerline_enabled
powerline_enabled=true

[ $powerline_enabled = "true" ]&& printf "POWERLINE \ue0b0"  #Before
$powerline_enabled&& printf "POWERLINE \ue0b0" #After

スマートだけど危なそう。ちゃんとtrueかfalse代入しとけばいいと思うけど。

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