feat: add support for other NYC configuration files

common-utils.js

@@ -7,20 +7,9 @@ function stringToArray(prop, obj) {
   return obj
 }
 
-function combineNycOptions({
-  pkgNycOptions,
-  nycrc,
-  nycrcJson,
-  defaultNycOptions
-}) {
+function combineNycOptions(...options) {
   // last option wins
-  const nycOptions = Object.assign(
-    {},
-    defaultNycOptions,
-    nycrc,
-    nycrcJson,
-    pkgNycOptions
-  )
+  const nycOptions = Object.assign({}, ...options)
 
   // normalize string and [string] props
   stringToArray('reporter', nycOptions)

cypress/integration/combine-spec.js

@@ -5,10 +5,7 @@ describe('Combine NYC options', () => {
       extends: '@istanbuljs/nyc-config-typescript',
       all: true
     }
-    const combined = combineNycOptions({
-      pkgNycOptions,
-      defaultNycOptions
-    })
+    const combined = combineNycOptions(defaultNycOptions, pkgNycOptions)
     cy.wrap(combined).should('deep.equal', {
       extends: '@istanbuljs/nyc-config-typescript',
       all: true,
@@ -23,10 +20,7 @@ describe('Combine NYC options', () => {
     const pkgNycOptions = {
       reporter: 'text'
     }
-    const combined = combineNycOptions({
-      pkgNycOptions,
-      defaultNycOptions
-    })
+    const combined = combineNycOptions(defaultNycOptions, pkgNycOptions)
     cy.wrap(combined).should('deep.equal', {
       'report-dir': './coverage',
       reporter: ['text'],
@@ -47,15 +41,19 @@ describe('Combine NYC options', () => {
       exclude: ['bar.js'],
       reporter: ['json']
     }
-    const combined = combineNycOptions({
-      pkgNycOptions,
+    const nycConfig = {
+      'report-dir': './report'
+    }
+    const combined = combineNycOptions(
+      defaultNycOptions,
       nycrc,
       nycrcJson,
-      defaultNycOptions
-    })
+      nycConfig,
+      pkgNycOptions
+    )
     cy.wrap(combined).should('deep.equal', {
       all: true,
-      'report-dir': './coverage',
+      'report-dir': './report',
       reporter: ['json'],
       extension: ['.js'],
       excludeAfterRemap: false,

package.json

@@ -52,6 +52,7 @@
     "execa": "4.0.2",
     "globby": "11.0.0",
     "istanbul-lib-coverage": "3.0.0",
+    "js-yaml": "3.14.0",
     "nyc": "15.0.1"
   },
   "devDependencies": {

task-utils.js

@@ -8,6 +8,7 @@ const { isAbsolute, resolve, join } = require('path')
 const debug = require('debug')('code-coverage')
 const chalk = require('chalk')
 const globby = require('globby')
+const yaml = require('js-yaml')
 const { combineNycOptions, defaultNycOptions } = require('./common-utils')
 
 function readNycOptions(workingDirectory) {
@@ -27,12 +28,45 @@ function readNycOptions(workingDirectory) {
     ? JSON.parse(readFileSync(nycrcJsonFilename, 'utf8'))
     : {}
 
-  const nycOptions = combineNycOptions({
-    pkgNycOptions,
+  const nycrcYamlFilename = join(workingDirectory, '.nycrc.yaml')
+  let nycrcYaml = {}
+  if (existsSync(nycrcYamlFilename)) {
+    try {
+      nycrcYaml = yaml.safeLoad(readFileSync(nycrcYamlFilename, 'utf8'))
+    } catch (error) {
+      throw new Error(`Failed to load .nycrc.yaml: ${error.message}`)
+    }
+  }
+
+  const nycrcYmlFilename = join(workingDirectory, '.nycrc.yml')
+  let nycrcYml = {}
+  if (existsSync(nycrcYmlFilename)) {
+    try {
+      nycrcYml = yaml.safeLoad(readFileSync(nycrcYmlFilename, 'utf8'))
+    } catch (error) {
+      throw new Error(`Failed to load .nycrc.yml: ${error.message}`)
+    }
+  }
+
+  const nycConfigFilename = join(workingDirectory, 'nyc.config.js')
+  let nycConfig = {}
+  if (existsSync(nycConfigFilename)) {
+    try {
+      nycConfig = require(nycConfigFilename)
+    } catch (error) {
+      throw new Error(`Failed to load nyc.config.js: ${error.message}`)
+    }
+  }
+
+  const nycOptions = combineNycOptions(
+    defaultNycOptions,
     nycrc,
     nycrcJson,
-    defaultNycOptions
-  })
+    nycrcYaml,
+    nycrcYml,
+    nycConfig,
+    pkgNycOptions
+  )
   debug('combined NYC options %o', nycOptions)
 
   return nycOptions