Class: ConvenientService::Examples::Rails::Gemfile::Services::StripComments

Inherits:
Object
  • Object
show all
Includes:
RailsService::Config
Defined in:
lib/convenient_service/examples/rails/gemfile/services/strip_comments.rb

Instance Method Summary collapse

Instance Method Details

#file_with_comments ⇒ Object 



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# File 'lib/convenient_service/examples/rails/gemfile/services/strip_comments.rb', line 89

def file_with_comments
  ##
  # NOTE: Tempfile is used to avoid issues with escaping of quotes inside JS script.
  #
  @file_with_comments ||= ::Tempfile.new.tap { |tempfile| tempfile.write(content_with_comments) }.tap(&:close)
end

#file_without_comments ⇒ Object 



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# File 'lib/convenient_service/examples/rails/gemfile/services/strip_comments.rb', line 96

def file_without_comments
  ##
  # NOTE: JS script tries to fill content of the file without comments.
  #
  @file_without_comments ||= ::Tempfile.new
end

#js_script ⇒ Object

NOTE: When you have no time to do something well, delegate that task to someone who already works with it all the time. That is why strip-comments npm package is used to remove comments.



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# File 'lib/convenient_service/examples/rails/gemfile/services/strip_comments.rb', line 34

def js_script
  ##
  # NOTE: `main` function is created in order to have an ability to use early returns.
  #
  # IMPORTANT: Use only double quotes inside this JS script, since it is later consumed by `node -e` option wrapped by single quoutes.
  #
  # TODO: Consider to use WeakRef if memory is a concern.
  # https://ruby-doc.org/stdlib-2.5.1/libdoc/weakref/rdoc/WeakRef.html
  #
  # TODO: Jest tests for JS script.
  #
  @js_script ||= <<~JAVASCRIPT.gsub(/\n\s*/, " ")
    const main = () => {
      const process = require("process");
      const fs = require("fs");

      /**
       * TODO: try/catch when "strip-comments" is not available.
       */
      const strip = require("strip-comments");

      const fileWithCommentsPath = process.argv[1];
      const fileWithoutCommentsPath = process.argv[2];
      const language = process.argv[3] || "ruby";

      if (!fileWithCommentsPath) {
        console.log("Error: Input file path is NOT passed.");

        process.exit(1);
      }

      if (!fileWithoutCommentsPath) {
        console.log("Error: Output file path is NOT passed.");

        process.exit(1);
      }

      if (!["ruby", "javascript"].includes(language)) {
        console.log("Error: Language " + language + " is NOT supported.");

        process.exit(1);
      }

      const fileWithCommentsContent = fs.readFileSync(fileWithCommentsPath, { encoding: "utf8" });
      const fileWithoutCommentsContent = strip(fileWithCommentsContent, { language });

      fs.writeFileSync(fileWithoutCommentsPath, fileWithoutCommentsContent, { encoding: "utf8" });

      process.exit(0);
    };

    main();
  JAVASCRIPT
end

#result ⇒ Object 



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# File 'lib/convenient_service/examples/rails/gemfile/services/strip_comments.rb', line 26

def result
  success(content_without_comments: file_without_comments.read)
end