Generate Xcode snippets from XCTest_Gherkin step definitions

create_xcode_snippets.rb

#!/usr/bin/env ruby
# Usage: 
# chmod 755 create_xcode_snippets.rb
# ./create_xcode_snippets.rb --project_path "path-to-project-file.xcodeproj"
require 'xcodeproj'

$project_path = File.expand_path(ARGV.find.with_index { |item, index| ARGV[index - 1] == "--project_path" })
$snippets_path = File.expand_path("~/Library/Developer/Xcode/UserData/CodeSnippets/")
$snippet_prefix = "STEP-"

def clear_snippets
    Dir.new($snippets_path).each do |file|
        File.delete(File.join($snippets_path, file)) if file.start_with?($snippet_prefix)
    end
end

def parse_steps
    project = Xcodeproj::Project.open($project_path)
    project.targets.each do |target|
        step_files = target.source_build_phase.files.to_a.map do |pbx_build_file|
            pbx_build_file.file_ref.real_path.to_s
        end.select do |path|
            path.end_with?("Steps.swift")
        end.select do |path|
            File.exists?(path)
        end

        step_files.each do |path|
            File.open(path).each do |line|
                line.scan(/\s*step\("(.+)"\)[\s\n]+{/).each do |match|
                    uuid = `uuidgen`.strip
                    yield(match[0], uuid)
                end
            end
        end
    end
end

def generate_snippet(expr, uuid)
    %Q(
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
        <key>IDECodeSnippetCompletionPrefix</key>
        <string>step #{expr}</string>
        <key>IDECodeSnippetCompletionScopes</key>
        <array>
            <string>CodeExpression</string>
        </array>
        <key>IDECodeSnippetContents</key>
        <string>"#{expr}"</string>
        <key>IDECodeSnippetIdentifier</key>
        <string>STEP-#{uuid}</string>
        <key>IDECodeSnippetLanguage</key>
        <string>Xcode.SourceCodeLanguage.Swift</string>
        <key>IDECodeSnippetTitle</key>
        <string>#{expr}</string>
        <key>IDECodeSnippetUserSnippet</key>
        <true/>
        <key>IDECodeSnippetVersion</key>
        <integer>2</integer>
    </dict>
    </plist>
    )
end

clear_snippets
parse_steps do |step, uuid|
    snippet = generate_snippet(step, uuid)
    File.open(File.join($snippets_path, "#{$snippet_prefix}#{uuid}.codesnippet"), "w") { |f| f.write(snippet) }
end