updated to latest package versions (node 10+);

added support for rcfile;
added babel support for spread operator;
added yarn support;

.babelrc

@@ -3,6 +3,7 @@
     "es2015"
   ],
   "plugins": [
-    "transform-runtime"
+    "transform-runtime",
+    "transform-object-rest-spread"
   ]
 }

.travis.yml

@@ -9,6 +9,3 @@ os:
 node_js:
   - 12
   - 10
-  - 8
-  - 6
-  - 4

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "cli",
+      "program": "${workspaceFolder}/lib/cli.js",
+      "args": ["--debug"]
+    }
+  ]
+}

README.md

@@ -25,7 +25,7 @@ npm-check
 * Works with `npm@2` and `npm@3`, as well as newer alternative installers like `ied` and `pnpm`.
 
 ### Requirements
-* Node >= 0.11.
+* Node >= 10.
 
 ### On the command line
 
@@ -267,6 +267,18 @@ Each item in the array will look like the following:
 
 You will also see this if you use `--debug` on the command line.
 
+### RC File Support
+Additional options can be sent to the depcheck process.  See [depcheck API](https://github.com/depcheck/depcheck#api).  Create a .npmcheckrc{.json,.yml,.js} file and set the depcheck options under depcheck property.
+
+For example, to skip packages for unused check, but still want them in the outdated check (so can't use the --ignore option):
+```
+# .npmcheckrc
+
+depcheck:
+  ignoreMatches: ["replace-in-file","snyk","sonarqube-scanner"]
+
+```
+
 ### Inspiration
 
 * [npm outdated](https://www.npmjs.com/doc/cli/npm-outdated.html) - awkward output, requires --depth=0 to be grokable.

appveyor.yml

@@ -1,12 +1,10 @@
 environment:
   matrix:
-  - nodejs_version: 7
-  - nodejs_version: 6
-  - nodejs_version: 4
+  - nodejs_version: 12
+  - nodejs_version: 10
 
 install:
   - ps: Install-Product node $env:nodejs_version
-  - npm i -g npm@3
   - npm install
   - set CI=true
 

latest.txt

@@ -0,0 +1,31 @@
+dependencies
+callsite-record v3 -> v4; didn't see any breaking changes identified in doc
+chalk v1 -> v4; fixed stripColor; node >= 10; other breaking changes didn't seem to apply
+depcheck v0 -> v1; didn't see any breaking changes identified in doc
+execa v0 -> v5; node >= 10; other breaking changes didn't seem to apply
+global-modules v1 -> v2; didn't see any breaking changes identified in doc
+globby v4 -> v11; node >= 10; other breaking changes didn't seem to apply
+inquirer v0 - v7; fixed inquirer.prompt call
+is-ci v1 -> v2; didn't see any breaking changes identified in doc
+lodash v4 -> v4
+meow v3 -> v9; fixed options; node >= 10; other breaking changes didn't seem to apply
+node-emoji v1 -> v1
+ora v0 -> v5; node >= 10; other breaking changes didn't seem to apply
+package-json v4 -> v6; node >= 8; other breaking changes didn't seem to apply
+path-exists v2 -> v4; node >= 8; other breaking changes didn't seem to apply
+pkg-dir v1 -> v5; node >= 10; other breaking changes didn't seem to apply
+preferred-pm v1 -> v3; no release/tags found
+rc-config-loader *new*
+semver v5 -> v7; didn't see any breaking changes identified in doc
+semver-diff v2 -> v3; node >= 8; other breaking changes didn't seem to apply
+strip-ansi *new*
+throat v2 -> v6; node > 10; other breaking changes didn't seem to apply
+update-notifier v2 -> v5; node > 10; other breaking changes didn't seem to apply
+xtend v4 -> v4
+
+devDependencies
+babel-cli v6 -> v6
+babel-plugin-transform-object-rest-spread *new*
+babel-plugin-transform-runtime v6 -> v6
+babel-preset-es2015 v6 -> v6
+xo v0 -> v0

lib/cli.js

@@ -16,8 +16,8 @@ const detectPreferredPM = require('preferred-pm');
 
 updateNotifier({pkg}).notify();
 
-const cli = meow({
-    help: `
+/* eslint-disable indent */
+const cli = meow(`
         Usage
           $ npm-check <path> <options>
 
@@ -42,43 +42,65 @@ const cli = meow({
           $ npm-check           # See what can be updated, what isn't being used.
           $ npm-check ../foo    # Check another path.
           $ npm-check -gu       # Update globally installed modules by picking which ones to upgrade.
-    `},
+    `,
     {
-        alias: {
-            u: 'update',
-            y: 'update-all',
-            g: 'global',
-            s: 'skip-unused',
-            p: 'production',
-            d: 'dev-only',
-            E: 'save-exact',
-            i: 'ignore'
-        },
-        default: {
-            dir: pkgDir.sync() || process.cwd(),
-            emoji: !isCI,
-            spinner: !isCI
-        },
-        boolean: [
-            'update',
-            'update-all',
-            'global',
-            'skip-unused',
-            'production',
-            'dev-only',
-            'save-exact',
-            'color',
-            'emoji',
-            'spinner'
-        ],
-        string: [
-            'ignore',
-            'specials'
-        ]
+        flags: {
+            update: {
+                type: 'boolean',
+                alias: 'u'
+            },
+            updateAll: {
+                type: 'boolean',
+                alias: 'y'
+            },
+            global: {
+                type: 'boolean',
+                alias: 'g'
+            },
+            skipUnused: {
+                type: 'boolean',
+                alias: 's'
+            },
+            production: {
+                type: 'boolean',
+                alias: 'p'
+            },
+            devOnly: {
+                type: 'boolean',
+                alias: 'd'
+            },
+            saveExact: {
+                type: 'boolean',
+                alias: 'E'
+            },
+            ignore: {
+                type: 'string',
+                alias: 'i'
+            },
+            specials: {
+                type: 'string'
+            },
+            color: {
+                type: 'boolean'
+            },
+            emoji: {
+                type: 'boolean',
+                default: !isCI
+            },
+            debug: {
+                type: 'boolean'
+            },
+            spinner: {
+                type: 'boolean',
+                default: !isCI
+            }
+        }
     });
 
+/* eslint-enable indent */
+
 const options = {
-    cwd: cli.input[0] || cli.flags.dir,
+    cwd: cli.input[0] || pkgDir.sync() || process.cwd(),
     update: cli.flags.update,
     updateAll: cli.flags.updateAll,
     global: cli.flags.global,
@@ -115,28 +137,29 @@ Promise.resolve()
         if (options.updateAll) {
             return updateAll(currentState);
         }
+
         if (options.update) {
             return interactiveUpdate(currentState);
         }
 
         return staticOutput(currentState);
     })
-    .catch(err => {
-        console.log(err.message);
+    .catch(error => {
+        console.log(error.message);
+
         if (options.debug) {
-            console.log(createCallsiteRecord(err).renderSync());
+            console.log(createCallsiteRecord(error).renderSync());
         } else {
             console.log('For more detail, add `--debug` to the command');
         }
+
         process.exit(1);
     });
 
-const SUPPORTED_INSTALLERS = ['npm', 'pnpm', 'ied'];
+// eslint-disable-next-line unicorn/prefer-set-has
+const SUPPORTED_INSTALLERS = ['npm', 'pnpm', 'ied', 'yarn'];
 
-function detectPreferredInstaller(cwd) {
-    return detectPreferredPM(cwd)
-        .then(preferredPM => {
-            return preferredPM && SUPPORTED_INSTALLERS.indexOf(preferredPM.name) !== -1 ?
-                preferredPM.name : 'npm';
-        });
+async function detectPreferredInstaller(cwd) {
+    const preferredPM = await detectPreferredPM(cwd);
+    return preferredPM && SUPPORTED_INSTALLERS.includes(preferredPM.name) ? preferredPM.name : 'npm';
 }

lib/in/get-unused-packages.js

@@ -3,6 +3,7 @@
 const depcheck = require('depcheck');
 const ora = require('ora');
 const _ = require('lodash');
+const { rcFile } = require('rc-config-loader');
 
 function skipUnused(currentState) {
     return currentState.get('skipUnused') ||        // manual option to ignore this
@@ -11,6 +12,20 @@ function skipUnused(currentState) {
         !currentState.get('cwdPackageJson').name;   // there's no package.json
 }
 
+function loadRcFile(rcFileName) {
+    try {
+        const results = rcFile(rcFileName);
+        // Not Found
+        if (!results) {
+            return {};
+        }
+        return results.config;
+    } catch (error) {
+        console.error(`Error parsing rc file; skipping it; error: ${error.message}`);
+        return {}; // default value
+    }
+}
+
 function getSpecialParsers(currentState) {
     const specialsInput = currentState.get('specials');
     if (!specialsInput) return;
@@ -31,7 +46,7 @@ function checkUnused(currentState) {
             return;
         }
 
-        const depCheckOptions = {
+        const depcheckDefaults = {
             ignoreDirs: [
                 'sandbox',
                 'dist',
@@ -57,7 +72,14 @@ function checkUnused(currentState) {
             specials: getSpecialParsers(currentState)
         };
 
-        depcheck(currentState.get('cwd'), depCheckOptions, resolve);
+        let npmCheckRc = loadRcFile('npmcheck');
+
+        let depcheckOptions = {
+            ...depcheckDefaults,
+            ...npmCheckRc.depcheck
+        };
+
+        depcheck(currentState.get('cwd'), depcheckOptions, resolve);
     }).then(depCheckResults => {
         spinner.stop();
         const unusedDependencies = [].concat(depCheckResults.dependencies, depCheckResults.devDependencies);

lib/index.js

@@ -3,9 +3,9 @@
 const npmCheck = require('./in');
 const createState = require('./state/state');
 
-function init(userOptions) {
-    return createState(userOptions)
-        .then(currentState => npmCheck(currentState));
+async function init(userOptions) {
+    const currentState = await createState(userOptions);
+    return npmCheck(currentState);
 }
 
 module.exports = init;

lib/out/install-packages.js

@@ -10,11 +10,16 @@ function install(packages, currentState) {
     }
 
     const installer = currentState.get('installer');
-    const installGlobal = currentState.get('global') ? '--global' : null;
-    const saveExact = currentState.get('saveExact') ? '--save-exact' : null;
     const color = chalk.supportsColor ? '--color=always' : null;
 
-    const npmArgs = ['install']
+    const isYarn = installer === 'yarn';
+
+    const installGlobal = currentState.get('global') ? (isYarn ? 'global' : '--global'): null;
+    const saveExact = currentState.get('saveExact') ? (isYarn ? '--exact' : '--save-exact') : null;
+
+    const installCmd = isYarn ? 'add' : 'install';
+
+    const npmArgs = [installCmd]
         .concat(installGlobal)
         .concat(saveExact)
         .concat(packages)