Rigidify code replacement by using Lodash templates.

tasks/post-build.ts

@@ -1,11 +1,10 @@
 import { writeFileSync, readFileSync } from 'fs'
+import { template } from 'lodash'
 
 /**
- * post build step to insert code files into code files (naively).
- * '{{replace:path/to/file}}' => "file contents"
+ * post build step to insert code files into code files.
  * And the package.json version.
  */
-//inject('plugins/nexe-daemon/lib/index.js')
 cp('src/fs/package.json', 'lib/fs/package.json')
 cp('src/fs/bootstrap.js', 'lib/fs/bootstrap.js')
 cp('src/fs/README.md', 'lib/fs/README.md')
@@ -14,18 +13,12 @@ inject('lib/patches/third-party-main.js')
 inject('lib/steps/shim.js')
 inject('lib/options.js', JSON.stringify(require('../package.json').version))
 
-function inject(filename: string, ...replacements: string[]) {
-  let contents = readFileSync(filename, 'utf8')
-  contents = contents.replace(/('{{(.*)}}')/g, (substring: string, ...matches: string[]) => {
-    if (!matches || !matches[1]) {
-      return substring
-    }
-    const [replace, file] = matches[1].split(':')
-    if (replace !== 'replace') {
-      return substring
-    }
-    console.log('Replacing: ', substring)
-    return replacements[+file] ? replacements[+file] : JSON.stringify(readFileSync(file, 'utf8'))
+function inject(filename: string, version?: string) {
+  const contents = template(readFileSync(filename, 'utf8'), {
+    interpolate: /'\{\{([\s\S]*?)\}\}'/,
+  })({
+    file: (path: string) => JSON.stringify(readFileSync(path, 'utf8')),
+    version,
   })
   writeFileSync(filename, contents)
   console.log(`Wrote: ${filename}`)