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#!/usr/bin/env ruby
require 'optparse'
require 'pathname'
class LineProcessor
MATCHERS = {
:layout => /^layout:\s*(\S*)$/i,
:single_line_redirect => /^redirect_\w+:\s*\S+$/i,
:base_url => /\{\{\s*site\.baseurl\s*\}\}(\S+)/i,
:asset_url => /\{\{\s*site\.baseurl\s*\}\}[^assets]\S*/i
}
attr_reader :line, :options
def initialize(line, options = {})
@line = line
@options = options
end
def process
@line = use_locale_layout
@line = remove_single_line_redirects
@line = replace_site_baseurl
@line
end
def english?
options[:lang] == 'en'
end
private
def use_locale_layout
return line if english?
match = line.match(MATCHERS[:layout])
if match
"layout: #{ options[:lang] }/#{ match[1] }"
else
line
end
end
def remove_single_line_redirects
return line if english?
match = line.match(MATCHERS[:single_line_redirect])
if match
''
else
line
end
end
def replace_site_baseurl
line.gsub(MATCHERS[:base_url]) do |match|
new_match = match =~ MATCHERS[:asset_url]
if new_match
match.gsub(/\{\{\s?site.baseurl\s?\}\}/, '{{ page.baseurl }}/')
else
match
end
end
end
end
class UnsupportedMatchChecker
UNSUPPORTED_MATCHERS = {
:multi_line_redirect => /^redirect_\w+:(\s*-{1}\s*.*)+$/i,
:include_template => /\{\%\s*include/i
}
attr_reader :warnings
def initialize(file_contents, file_name = 'File')
@warnings = []
UNSUPPORTED_MATCHERS.each do |name, regex|
if file_contents =~ regex
@warnings << "WARNING: #{ file_name } contains #{ name } which cannot be processed"
end
end
end
end
options = {}
optionparser = OptionParser.new do |opts|
opts.banner = "Usage: #{ __FILE__ } [options] source_file"
opts.on("--force", "Ignore warnings and continue processing the source_file") do |f|
options[:force] = f
end
opts.on("-h", "--help", "Show this message") do
puts opts
exit
end
opts.on("--in-place", "Write the processed text back to the source_file") do |p|
options[:in_place] = p
end
opts.on("-l", "--lang=LANG", "Two-letter language code of the source_file") do |s|
options[:lang] = s.downcase
end
opts.on("-o", "--output-file=FILE", "File to write the processed text to") do |o|
options[:output_file] = o
end
end
optionparser.parse!
unless ARGV.length == 1
puts optionparser.help
exit 1
end
source_file = ARGV.shift
if options[:in_place]
options[:output_file] = source_file
end
unless options[:force]
source_file_contents = File.read(source_file)
source_file_path = Pathname.new(source_file).realpath
warnings = UnsupportedMatchChecker.new(source_file_contents, source_file_path).warnings
if warnings.any?
puts warnings
puts "Use --force to ignore warnings and continue processing the file"
exit 1
end
end
new_contents = []
File.readlines(source_file).map do |line|
new_contents << LineProcessor.new(line, options).process
end
if options[:output_file]
File.open(options[:output_file], 'w') { |f| f.puts(new_contents) }
else
puts(new_contents)
end
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