Fix #199 – Allow regexes in array

Author: adamreisnz

package.json

@@ -1,7 +1,7 @@
 {
   "name": "replace-in-file",
   "type": "module",
-  "version": "8.1.0",
+  "version": "8.2.0",
   "description": "A simple utility to quickly replace text in one or more files.",
   "homepage": "https://github.com/adamreisnz/replace-in-file#readme",
   "author": {

src/helpers/config.js

@@ -17,6 +17,30 @@ export async function loadConfig(file) {
   return JSON.parse(json)
 }
 
+/**
+ * Helper to convert a string to Regex if it matches the pattern
+ */
+export function stringToRegex(str) {
+
+  //Array given
+  if (Array.isArray(str)) {
+    return str.map(stringToRegex)
+  }
+
+  //Not a string, or no match
+  const regexMatch = /.*\/([gimyus]*)$/
+  if (typeof str !== 'string' || !str.match(regexMatch)) {
+    return str
+  }
+
+  //Extract flags and pattern
+  const flags = str.replace(/.*\/([gimyus]*)$/, '$1')
+  const pattern = str.replace(new RegExp(`^/(.*?)/${flags}$`), '$1')
+
+  //Return regex
+  return new RegExp(pattern, flags)
+}
+
 /**
  * Parse config
  */
@@ -66,11 +90,7 @@ export function parseConfig(config) {
   }
 
   //Since we can't store Regexp in JSON, convert from string if needed
-  if (typeof from === 'string' && from.match(/.*\/([gimyus]*)$/)) {
-    const flags = from.replace(/.*\/([gimyus]*)$/, '$1')
-    const pattern = from.replace(new RegExp(`^/(.*?)/${flags}$`), '$1')
-    config.from = new RegExp(pattern, flags)
-  }
+  config.from = stringToRegex(from)
 
   //Use default encoding if invalid
   if (typeof encoding !== 'string' || encoding === '') {

src/helpers/config.spec.js

@@ -185,6 +185,18 @@ describe('helpers/config.js', () => {
       expect(parsed.from).to.be.an.instanceof(RegExp)
     })
 
+    it('should convert from an array of regexes if provided in JSON', async () => {
+      const parsed = parseConfig({
+        files: ['file.txt'],
+        from: ['/foo/g', '/baz/g', 'plain'],
+        to: 'bar',
+      })
+      expect(parsed.from).to.be.an.instanceof(Array)
+      expect(parsed.from[0]).to.be.an.instanceof(RegExp)
+      expect(parsed.from[1]).to.be.an.instanceof(RegExp)
+      expect(parsed.from[2]).to.equal('plain')
+    })
+
     it('should not convert from regex if it is a regular string', async () => {
       const parsed = parseConfig({
         files: ['file.txt'],