From b7e16cdf704bdf4935cfbc9f4a5eb228002fbc3a Mon Sep 17 00:00:00 2001
From: Eddie <hershmire@users.noreply.github.com>
Date: Tue, 2 Apr 2019 11:52:19 -0600
Subject: [PATCH] feat: Support turning off node_modules default exclude via
 flag (#912)

---
 index.js            |  1 +
 lib/config-util.js  |  6 ++++++
 test/src/nyc-tap.js | 14 ++++++++++++++
 3 files changed, 21 insertions(+)

diff --git a/index.js b/index.js
index a0a7431af..638b50015 100755
--- a/index.js
+++ b/index.js
@@ -58,6 +58,7 @@ function NYC (config) {
     cwd: this.cwd,
     include: config.include,
     exclude: config.exclude,
+    excludeNodeModules: config.excludeNodeModules !== false,
     extension: this.extensions
   })
 
diff --git a/lib/config-util.js b/lib/config-util.js
index 71d492a73..ef0e7a435 100644
--- a/lib/config-util.js
+++ b/lib/config-util.js
@@ -89,6 +89,12 @@ Config.buildYargs = function (cwd) {
       description: 'should exclude logic be performed after the source-map remaps filenames?',
       global: false
     })
+    .option('exclude-node-modules', {
+      default: true,
+      type: 'boolean',
+      describe: 'whether or not to exclude all node_module folders (i.e. **/node_modules/**) by default',
+      global: false
+    })
     .option('include', {
       alias: 'n',
       default: [],
diff --git a/test/src/nyc-tap.js b/test/src/nyc-tap.js
index 9cf644c40..3e60a12fb 100644
--- a/test/src/nyc-tap.js
+++ b/test/src/nyc-tap.js
@@ -123,6 +123,20 @@ describe('nyc', function () {
       nyc.exclude.shouldInstrument('/cwd/foo/bar/__tests__/foo.js', './__tests__/foo.js').should.equal(false)
     })
 
+    it('should allow turning off default node_modules exclude', function () {
+      var nyc = new NYC(configUtil.buildYargs('/cwd').parse([
+        '--exclude-node-modules', 'false',
+        '--exclude=**/__tests__/**',
+        '--exclude=node_modules/**'
+      ]))
+      // For this test, only excluding root node_modules. Local node_modules are allowed, but we
+      // still exclude matching items inside of local node_modules.
+      nyc.exclude.shouldInstrument('/cwd/foo', 'foo').should.equal(true)
+      nyc.exclude.shouldInstrument('/cwd/node_modules/bar', 'node_modules/bar').should.equal(false)
+      nyc.exclude.shouldInstrument('/cwd/foo/node_modules/bar', 'foo/node_modules/bar').should.equal(true)
+      nyc.exclude.shouldInstrument('/cwd/foo/node_modules/bar/__tests__/baz.js', 'foo/node_modules/bar/__tests__/baz.js').should.equal(false)
+    })
+
     it('should exclude appropriately with config.exclude', function () {
       var nyc = new NYC(configUtil.buildYargs(fixtures).parse())