Add "ignoreDirs" option

README.md

@@ -63,6 +63,7 @@ Options
   -p, --production      Skip devDependencies.
   -d, --dev-only        Look at devDependencies only (skip dependencies).
   -i, --ignore          Ignore dependencies based on succeeding glob.
+  -D, --ignore-dirs     Ignore directories as passed into depcheck.
   -E, --save-exact      Save exact version (x.y.z) instead of caret (^x.y.z) in package.json.
   --specials            List of depcheck specials to include in check for unused dependencies.
   --no-color            Force or disable color output.
@@ -137,6 +138,12 @@ Ignore dependencies that match specified glob.
 
 `$ npm-check -i babel-*` will ignore all dependencies starting with 'babel-'.
 
+#### `-D, --ignore-dirs`
+
+Ignore a comma-separated list of directories as passed into depcheck.
+
+`$ npm-check -D "tmp,build"` will avoid searching the 'tmp' and 'build' directories when using depcheck.
+
 #### `-E, --save-exact`
 
 Install packages using `--save-exact`, meaning exact versions will be saved in package.json.
@@ -208,6 +215,11 @@ npmCheck(options)
 * Ignore dependencies that match specified glob.
 * default is `[]`
 
+#### `ignoreDirs`
+
+* Ignore comma-separated list of directories as passed into depcheck.
+* default is `['sandbox', 'dist', 'generated', '.generated', 'build', 'fixtures', 'jspm_packages']`
+
 #### `saveExact`
 
 * Update package.json with exact version `x.y.z`  instead of semver range `^x.y.z`.

index.d.ts

@@ -5,6 +5,7 @@ declare module NpmCheck {
     skipUnused?: boolean;
     devOnly?: boolean;
     ignoreDev?: boolean;
+    ignoreDirs?: string;
     cwd?: string;
     saveExact?: boolean;
     currentState?: Object;
@@ -48,4 +49,4 @@ declare module NpmCheck {
 
 declare module "npm-check" {
     export = NpmCheck.default;
-}
+}

lib/cli.js

@@ -29,6 +29,7 @@ const cli = meow({
           -p, --production      Skip devDependencies.
           -d, --dev-only        Look at devDependencies only (skip dependencies).
           -i, --ignore          Ignore dependencies based on succeeding glob.
+          -D, --ignore-dirs     Ignore directories as passed into depcheck.
           -E, --save-exact      Save exact version (x.y.z) instead of caret (^x.y.z) in package.json.
           --specials            List of depcheck specials to include in check for unused dependencies.
           --no-color            Force or disable color output.
@@ -48,7 +49,8 @@ const cli = meow({
             p: 'production',
             d: 'dev-only',
             E: 'save-exact',
-            i: 'ignore'
+            i: 'ignore',
+            D: 'ignore-dirs'
         },
         default: {
             dir: pkgDir.sync() || process.cwd(),
@@ -68,6 +70,7 @@ const cli = meow({
         ],
         string: [
             'ignore',
+            'ignore-dirs',
             'specials'
         ]
     });
@@ -85,7 +88,8 @@ const options = {
     installer: process.env.NPM_CHECK_INSTALLER || 'npm',
     debug: cli.flags.debug,
     spinner: cli.flags.spinner,
-    ignore: cli.flags.ignore
+    ignore: cli.flags.ignore,
+    ignoreDirs: cli.flags.ignoreDirs
 };
 
 if (options.debug) {

lib/in/get-unused-packages.js

@@ -31,16 +31,9 @@ function checkUnused(currentState) {
             return;
         }
 
+        let ignoreDirs = currentState.get('ignoreDirs');
         const depCheckOptions = {
-            ignoreDirs: [
-                'sandbox',
-                'dist',
-                'generated',
-                '.generated',
-                'build',
-                'fixtures',
-                'jspm_packages'
-            ],
+            ignoreDirs: Array.isArray(ignoreDirs) ? ignoreDirs : ignoreDirs.split(/,\s*/),
             ignoreMatches: [
                 'gulp-*',
                 'grunt-*',

lib/state/state.js

@@ -20,6 +20,7 @@ const defaultOptions = {
     spinner: false,
     installer: 'npm',
     ignore: [],
+    ignoreDirs: ['sandbox', 'dist', 'generated', '.generated', 'build', 'fixtures', 'jspm_packages'],
 
     globalPackages: {},
     cwdPackageJson: {devDependencies: {}, dependencies: {}},