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31 lines
1.0 KiB
Ruby
31 lines
1.0 KiB
Ruby
module Linguist
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module Strategy
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class Modeline
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EmacsModeline = /-\*-\s*(?:(?!mode)[\w-]+\s*:\s*(?:[\w+-]+)\s*;?\s*)*(?:mode\s*:)?\s*([\w+-]+)\s*(?:;\s*(?!mode)[\w-]+\s*:\s*[\w+-]+\s*)*;?\s*-\*-/i
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VimModeline = /\/\*\s*vim:\s*set\s*(?:ft|filetype)=(\w+):\s*\*\//i
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# Public: Detects language based on Vim and Emacs modelines
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#
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# blob - An object that quacks like a blob.
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#
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# Examples
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#
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# Modeline.call(FileBlob.new("path/to/file"))
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#
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# Returns an Array with one Language if the blob has a Vim or Emacs modeline
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# that matches a Language name or alias. Returns an empty array if no match.
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def self.call(blob, _ = nil)
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Array(Language.find_by_alias(modeline(blob.data)))
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end
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# Public: Get the modeline from the first n-lines of the file
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#
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# Returns a String or nil
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def self.modeline(data)
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match = data.match(EmacsModeline) || data.match(VimModeline)
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match[1] if match
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end
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end
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end
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end
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