Append .map extension to output source map filename

[camerondubas]

Rather than replacing the .js extension with .map, this appends them so that source maps follow the some-file.js.map naming structure. This is already how .mjs files are handled since the replacing logic specifically targets .js so this change makes the output naming consistent across filetypes.

While not required, the source map spec lists the .js.map naming structure as a convention.

For context, the current naming came up as an issue when trying to upload source maps to Datadog, which requires the conventional naming.

[camerondubas]

@rwjblue I'm not sure who to tag in order to get this reviewed. No reviewer was automatically added. Could you point me in the right direction? Thanks!

[notmessenger]

@rwjblue I'm not sure who to tag in order to get this reviewed. No reviewer was automatically added. Could you point me in the right direction? Thanks!

@rwjblue I have the same need for the same situation of uploading source maps to Datadog

[Chris-ScreenSteps]

Anyone needing to rename ember-cli-build's minified sourcemap files from .map to .js.map after the build in order to work with datadog, etc, could create an in repo-addon (ember generate in-repo-addon rename-sourcemap-file), and use the postBuild hook in the addon's index.js file to do this:

'use strict';

// replace your-app-name with the name of your app in package.json, or the output .js filename if you have changed it from the default

module.exports = {
  name: require('./package').name,

  postBuild: function (results) {
    const fs = require('fs-extra');

    let foundFile = '';
    let copyFile = '';
    let file = null;
    let files = fs.readdirSync(results.directory + '/assets/');
    for (let i = 0, l = files.length; i < l; i++) {
      file = files[i];
      if (file.match(/your-app-name\.map$/) !== null) {
        foundFile = results.directory + '/assets/' + file;
        copyFile = results.directory + '/assets/' + file.replace(/\.map/, '.js.map');
        fs.copySync(foundFile, copyFile);
        fs.removeSync(foundFile);
        break;
      }
    }
  },
};

[camerondubas]

@NullVoxPopuli any chance this could get looked at? Not sure who to tag, but I noticed you published the latest release.