feat: add a new config attribute for allowedGremlins

src/rules/line/noGremlins.spec.ts

@@ -1,5 +1,5 @@
-import { Severity } from '../../types/Severity'
-import { noGremlins } from './noGremlins'
+import { noGremlins, charFromHex } from './noGremlins'
+import { LintConfig } from '../../types'
 
 describe('noTabs', () => {
   it('should return an empty array when the line does not have any gremlin', () => {
@@ -8,8 +8,19 @@ describe('noTabs', () => {
   })
 
   it('should return a diagnostic array when the line contains gremlins', () => {
-    const line = "–  ‘ %put 'hello';"
+    const line = `${charFromHex('0x0080')} ${charFromHex(
+      '0x3000'
+    )} %put 'hello';`
     const diagnostics = noGremlins.test(line, 1)
     expect(diagnostics.length).toEqual(2)
   })
+
+  it('should return an empty array when the line contains gremlins but those gremlins are allowed', () => {
+    const config = new LintConfig({ allowedGremlins: ['0x0080', '0x3000'] })
+    const line = `${charFromHex('0x0080')} ${charFromHex(
+      '0x3000'
+    )} %put 'hello';`
+    const diagnostics = noGremlins.test(line, 1, config)
+    expect(diagnostics.length).toEqual(0)
+  })
 })

src/rules/line/noGremlins.ts

@@ -10,15 +10,18 @@ const message = 'Line contains a gremlin'
 
 const test = (value: string, lineNumber: number, config?: LintConfig) => {
   const severity = config?.severityLevel[name] || Severity.Warning
+  const allowedGremlins = config?.allowedGremlins || []
 
   const diagnostics: Diagnostic[] = []
 
   const gremlins: any = {}
 
-  for (const [hexCode, config] of Object.entries(gremlinCharacters)) {
-    gremlins[charFromHex(hexCode)] = Object.assign({}, config, {
-      hexCode
-    })
+  for (const [hexCode, gremlinConfig] of Object.entries(gremlinCharacters)) {
+    if (!allowedGremlins.includes(hexCode)) {
+      gremlins[charFromHex(hexCode)] = Object.assign({}, gremlinConfig, {
+        hexCode
+      })
+    }
   }
 
   const regexpWithAllChars = new RegExp(
@@ -56,4 +59,5 @@ export const noGremlins: LineLintRule = {
   test
 }
 
-const charFromHex = (hexCode: string) => String.fromCodePoint(parseInt(hexCode))
+export const charFromHex = (hexCode: string) =>
+  String.fromCodePoint(parseInt(hexCode))