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completion: fail silently if _init_completion is not found
The completion script depends on bash-completion 1.90 or later, with _init_completion function. If that's not present, for some reason, the completion currently fails with an ugly message, messing up user's command line: $ notmuch -bash: _init_completion: command not found It's better to just not complete
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@ -395,6 +395,10 @@ _notmuch()
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{
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{
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local _notmuch_commands="compact config count dump help insert new reply restore search setup show tag"
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local _notmuch_commands="compact config count dump help insert new reply restore search setup show tag"
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local arg cur prev words cword split
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local arg cur prev words cword split
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# require bash-completion with _init_completion
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type -t _init_completion >/dev/null 2>&1 || return
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_init_completion || return
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_init_completion || return
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COMPREPLY=()
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COMPREPLY=()
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