extract synvert-core from synvert

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp

.rspec

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+--color
+--format documentation

.travis.yml

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+language: ruby
+rvm:
+  - 1.9.3
+  - 2.0.0
+  - 2.1.0
+  - 2.1.1

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in synvert.gemspec
+gemspec
+
+gem 'coveralls', require: false

LICENSE.txt

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+Copyright (c) 2014 Richard Huang
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Synvert::Core
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'synvert-core'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install synvert-core
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/[my-github-username]/synvert-core/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+

lib/synvert/core.rb

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+require "synvert/core/version"
+
+# coding: utf-8
+require "synvert/core/version"
+require 'bundler'
+require 'parser'
+require 'parser/current'
+require 'ast'
+require 'active_support/inflector'
+require 'synvert/core/node_ext'
+
+module Synvert
+  module Core
+    autoload :Configuration, 'synvert/core/configuration'
+    autoload :Rewriter, 'synvert/core/rewriter'
+    autoload :RewriterNotFound, 'synvert/core/exceptions'
+    autoload :GemfileLockNotFound, 'synvert/core/exceptions'
+    autoload :MethodNotSupported, 'synvert/core/exceptions'
+  end
+end
+
+module Synvert
+  Rewriter = Core::Rewriter
+end

lib/synvert/core/cli.rb

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+# coding: utf-8
+require 'optparse'
+require 'open-uri'
+
+module Synvert::Core
+  # Synvert command line interface.
+  class CLI
+    # Initialize the cli and run.
+    #
+    # @param args [Array] arguments, default is ARGV.
+    # @return [Boolean] true if command runs successfully.
+    def self.run(args = ARGV)
+      new.run(args)
+    end
+
+    # Initialize a CLI.
+    def initialize
+      @options = {command: 'run', snippet_paths: [], snippet_names: []}
+      Configuration.instance.set :skip_files, []
+    end
+
+    # Run the CLI.
+    # @param args [Array] arguments.
+    # @return [Boolean] true if command runs successfully.
+    def run(args)
+      run_option_parser(args)
+      load_rewriters
+
+      case @options[:command]
+      when 'list' then list_available_rewriters
+      when 'query' then query_available_rewriters
+      when 'show' then show_rewriter
+      else
+        @options[:snippet_names].each do |snippet_name|
+          puts "===== #{snippet_name} started ====="
+          rewriter = Rewriter.call snippet_name
+          puts rewriter.todo if rewriter.todo
+          puts "===== #{snippet_name} done ====="
+        end
+      end
+      true
+    rescue SystemExit
+      true
+    rescue Parser::SyntaxError => e
+      puts "Syntax error: #{e.message}"
+      puts "file #{e.diagnostic.location.source_buffer.name}"
+      puts "line #{e.diagnostic.location.line}"
+      false
+    rescue Exception => e
+      print "Error: "
+      p e
+      false
+    end
+
+  private
+
+    # Run OptionParser to parse arguments.
+    def run_option_parser(args)
+      optparse = OptionParser.new do |opts|
+        opts.banner = "Usage: synvert [project_path]"
+        opts.on '-d', '--load SNIPPET_PATHS', 'load additional snippets, snippet paths can be local file path or remote http url' do |snippet_paths|
+          @options[:snippet_paths] = snippet_paths.split(',').map(&:strip)
+        end
+        opts.on '-l', '--list', 'list all available snippets' do
+          @options[:command] = 'list'
+        end
+        opts.on '-q', '--query QUERY', 'query specified snippets' do |query|
+          @options[:command] = 'query'
+          @options[:query] = query
+        end
+        opts.on '--skip FILE_PATTERNS', 'skip specified files or directories, separated by comma, e.g. app/models/post.rb,vendor/plugins/**/*.rb' do |file_patterns|
+          @options[:skip_file_patterns] = file_patterns.split(',')
+        end
+        opts.on '-s', '--show SNIPPET_NAME', 'show specified snippet description' do |snippet_name|
+          @options[:command] = 'show'
+          @options[:snippet_name] = snippet_name
+        end
+        opts.on '-r', '--run SNIPPET_NAMES', 'run specified snippets' do |snippet_names|
+          @options[:snippet_names] = snippet_names.split(',').map(&:strip)
+        end
+        opts.on '-v', '--version', 'show this version' do
+          puts Synvert::Core::VERSION
+          exit
+        end
+      end
+      paths = optparse.parse(args)
+      Configuration.instance.set :path, paths.first || Dir.pwd
+      if @options[:skip_file_patterns] && !@options[:skip_file_patterns].empty?
+        skip_files = @options[:skip_file_patterns].map { |file_pattern|
+          full_file_pattern = File.join(Configuration.instance.get(:path), file_pattern)
+          Dir.glob(full_file_pattern)
+        }.flatten
+        Configuration.instance.set :skip_files, skip_files
+      end
+    end
+
+    # Load all rewriters.
+    def load_rewriters
+      Dir.glob(File.join(File.dirname(__FILE__), 'snippets/**/*.rb')).each { |file| eval(File.read(file)) }
+
+      @options[:snippet_paths].each do |snippet_path|
+        if snippet_path =~ /^http/
+          uri = URI.parse snippet_path
+          eval(uri.read)
+        else
+          eval(File.read(snippet_path))
+        end
+      end
+    end
+
+    # List and print all available rewriters.
+    def list_available_rewriters
+      Rewriter.availables.each do |rewriter|
+        print rewriter.name.to_s + "  "
+      end
+      puts
+    end
+
+    # Query and print available rewriters.
+    def query_available_rewriters
+      Rewriter.availables.each do |rewriter|
+        if rewriter.name.include? @options[:query]
+          print rewriter.name + "  "
+        end
+      end
+      puts
+    end
+
+    # Show and print one rewriter.
+    def show_rewriter
+      rewriter = Rewriter.fetch(@options[:snippet_name])
+      if rewriter
+        rewriter.process_with_sandbox
+        puts rewriter.description
+        rewriter.sub_snippets.each do |sub_rewriter|
+          puts
+          puts "=" * 80
+          puts "snippet: #{sub_rewriter.name}"
+          puts "=" * 80
+          puts sub_rewriter.description
+        end
+      else
+        puts "snippet #{@options[:snippet_name]} not found"
+      end
+    end
+  end
+end

lib/synvert/core/configuration.rb

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+# encoding: utf-8
+require 'singleton'
+
+module Synvert::Core
+  # Synvert global configuration.
+  class Configuration < Hash
+    include Singleton
+
+    # Set the configuration.
+    #
+    # @param key [String] configuration key.
+    # @param value [Object] configuration value.
+    def set(key, value)
+      self[key] = value
+    end
+
+    # Get the configuration.
+    #
+    # @param key [String] configuration key.
+    # @return [Object] configuration value.
+    def get(key)
+      self[key]
+    end
+  end
+end

lib/synvert/core/exceptions.rb

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+module Synvert::Core
+  # Rewriter not found exception.
+  class RewriterNotFound < Exception
+  end
+
+  # Gemfile.lock not found exception.
+  class GemfileLockNotFound < Exception
+  end
+
+  # Method not supported exception.
+  class MethodNotSupported < Exception
+  end
+end