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document shebang code

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Brandon Keepers
2014-12-10 11:00:41 -05:00
parent afac6a918d
commit 1490425ecb
1 changed files with 9 additions and 2 deletions
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11
lib/linguist/shebang.rb
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@@ -20,18 +20,25 @@ module Linguist
def self.interpreter(data) def self.interpreter(data)
lines = data.lines lines = data.lines
# First line must start with #!
return unless match = /^#!(.+)$/.match(lines.first) return unless match = /^#!(.+)$/.match(lines.first)
tokens = match[1].strip.split(' ') tokens = match[1].strip.split(' ')
# There was nothing after the #!
return if tokens.empty? return if tokens.empty?
# Get the name of the interpreter
script = File.basename(tokens.first) script = File.basename(tokens.first)
# Get next argument if interpreter was /usr/bin/env
script = tokens[1] if script == 'env' script = tokens[1] if script == 'env'
# If script has an invalid shebang, we might get here # Interpreter was /usr/bin/env with no arguments
return unless script return unless script
# "python2.6" -> "python2" # "python2.6" -> "python2"
script.sub! $1, '' if script =~ /(\.\d+)$/ script.sub! /(\.\d+)$/, ''
# Check for multiline shebang hacks that call `exec` # Check for multiline shebang hacks that call `exec`
if script == 'sh' && if script == 'sh' &&