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https://github.com/fish-shell/fish-shell
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99e87dded3
This is to make pasting literals easier.
When a user pastes something, we normally take it as-is.
The exception is when a single-quote is open, e.g. the current token
is
foo'bar
When something is pasted here, we escape single-quotes (`'`) and
backslashes (`\\`), so typing a `'` after it will turn it into a
literal token.
Fixes #967.
60 lines
2.1 KiB
Fish
60 lines
2.1 KiB
Fish
function __fish_commandline_is_singlequoted --description "Return 0 if the current token has an open single-quote"
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# Go through the token char-by-char in a state machine.
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# The states are:
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# - normal - no quoting is active (the starting state)
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# - single - open single-quote
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# - double - open double
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# - escaped - open \\ - the next character is non-special
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# - single-escaped - open \\ inside single-quotes
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# - double-escaped - open \\ inside double-quotes
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set -l state normal
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for char in (commandline -ct | string split "")
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switch $char
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case "'" # single-quote
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switch $state
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case normal single-escaped
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set state single
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case single
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set state normal
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end
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case '"' # double-quote
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switch $state
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case normal double-escaped
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set state double
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case double
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set state normal
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end
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case \\ # backslash escapes the next character
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switch $state
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case double
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set state double-escaped
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case double-escaped
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set state double
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case single
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set state single-escaped
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case single-escaped
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set state single
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case normal
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set state escaped
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case escaped
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set state normal
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end
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case "*" # Any other character
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switch $state
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case escaped
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set state normal
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case single-escaped
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set state single
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case double-escaped
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set state double
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end
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end
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end
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# TODO: Should "single-escaped" also be a success?
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if contains -- $state single single-escaped
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return 0
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else
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return 1
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end
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end
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