Fix code duplication

src/config/normalize/lib/keywords/list/condition.js

@@ -1,10 +1,4 @@
-const normalize = function (definition) {
-  if (typeof definition !== 'boolean') {
-    throw new TypeError('Definition must be a boolean.')
-  }
-
-  return definition
-}
+import { normalizeBoolean } from '../normalize/common.js'
 
 const main = function (definition) {
   return definition ? undefined : { skip: true }
@@ -17,6 +11,6 @@ export default {
   name: 'condition',
   hasInput: true,
   undefinedInput: true,
-  normalize,
+  normalize: normalizeBoolean,
   main,
 }

src/config/normalize/lib/keywords/list/glob.js

@@ -4,14 +4,7 @@ import fastGlob from 'fast-glob'
 import { isNotJunk } from 'junk'
 
 import { validateDefinedString } from '../../type.js'
-
-const normalize = function (definition) {
-  if (typeof definition !== 'boolean') {
-    throw new TypeError('Definition must be a boolean.')
-  }
-
-  return definition
-}
+import { normalizeBoolean } from '../normalize/common.js'
 
 const main = async function (definition, input, { cwd }) {
   if (!definition) {
@@ -43,6 +36,6 @@ const main = async function (definition, input, { cwd }) {
 export default {
   name: 'glob',
   hasInput: true,
-  normalize,
+  normalize: normalizeBoolean,
   main,
 }

src/config/normalize/lib/keywords/list/path/main.js

@@ -3,8 +3,8 @@ import { resolve } from 'path'
 import { validateDefinedString } from '../../../type.js'
 
 import { validateAccess } from './access.js'
-import { normalize } from './normalize.js'
 import { fileExists, validateExists } from './exist.js'
+import { normalize } from './normalize.js'
 import { validateType } from './type.js'
 
 const main = async function (keywords, input, { cwd }) {

src/config/normalize/lib/keywords/list/pick.js

@@ -1,10 +1,4 @@
-const normalize = function (definition) {
-  if (typeof definition !== 'boolean') {
-    throw new TypeError('Definition must be a boolean.')
-  }
-
-  return definition
-}
+import { normalizeBoolean } from '../normalize/common.js'
 
 const main = function (definition) {
   return definition ? undefined : { skip: true, input: undefined }
@@ -19,6 +13,6 @@ export default {
   name: 'pick',
   hasInput: true,
   undefinedInput: true,
-  normalize,
+  normalize: normalizeBoolean,
   main,
 }

src/config/normalize/lib/keywords/list/prefix.js

@@ -1,10 +1,4 @@
-const normalize = function (definition) {
-  if (typeof definition !== 'string') {
-    throw new TypeError('Definition must be a string.')
-  }
-
-  return definition.trim()
-}
+import { normalizeString } from '../normalize/common.js'
 
 const main = function (definition) {
   return { info: { prefix: definition } }
@@ -14,6 +8,6 @@ const main = function (definition) {
 export default {
   name: 'prefix',
   undefinedInput: true,
-  normalize,
+  normalize: normalizeString,
   main,
 }

src/config/normalize/lib/keywords/list/required.js

@@ -1,15 +1,9 @@
+import { normalizeBoolean } from '../normalize/common.js'
+
 const test = function (input) {
   return input === undefined
 }
 
-const normalize = function (definition) {
-  if (typeof definition !== 'boolean') {
-    throw new TypeError('Definition must be a boolean.')
-  }
-
-  return definition
-}
-
 const main = function (definition) {
   if (definition) {
     throw new Error('must be defined.')
@@ -23,6 +17,6 @@ export default {
   name: 'required',
   undefinedInput: true,
   test,
-  normalize,
+  normalize: normalizeBoolean,
   main,
 }

src/config/normalize/lib/keywords/list/warn.js

@@ -1,10 +1,4 @@
-const normalize = function (definition) {
-  if (typeof definition !== 'string') {
-    throw new TypeError('Definition must be a string.')
-  }
-
-  return definition.trim()
-}
+import { normalizeString } from '../normalize/common.js'
 
 const main = function (definition) {
   return { warning: definition }
@@ -15,6 +9,6 @@ const main = function (definition) {
 export default {
   name: 'warn',
   hasInput: true,
-  normalize,
+  normalize: normalizeString,
   main,
 }

src/config/normalize/lib/keywords/normalize/common.js

@@ -0,0 +1,17 @@
+// Normalize string definition
+export const normalizeString = function (definition) {
+  if (typeof definition !== 'string') {
+    throw new TypeError('Definition must be a string.')
+  }
+
+  return definition.trim()
+}
+
+// Normalize boolean definition
+export const normalizeBoolean = function (definition) {
+  if (typeof definition !== 'boolean') {
+    throw new TypeError('Definition must be a boolean.')
+  }
+
+  return definition
+}