Check for missing or unused dependencies

bin/check-deps.js

@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+var fs = require('fs')
+var cp = require('child_process')
+
+var BUILT_IN_DEPS = ['child_process', 'electron', 'fs', 'os', 'path', 'screen']
+var EXECUTABLE_DEPS = ['gh-release', 'standard']
+
+main()
+
+// Scans our codebase and package.json for missing or unused dependencies
+// Process returns 0 on success, prints a message and returns 1 on failure
+function main () {
+  if (process.platform === 'win32') {
+    console.log('Sorry, check-deps only works on Mac and Linux')
+    return
+  }
+
+  var jsDeps = findJSDeps()
+  var packageDeps = findPackageDeps()
+
+  var missingDeps = jsDeps.filter((dep) =>
+    packageDeps.indexOf(dep) < 0 &&
+    BUILT_IN_DEPS.indexOf(dep) < 0)
+  var unusedDeps = packageDeps.filter((dep) =>
+    jsDeps.indexOf(dep) < 0 &&
+    EXECUTABLE_DEPS.indexOf(dep) < 0)
+
+  if (missingDeps.length > 0) console.log('Missing package dependencies: ' + missingDeps)
+  if (unusedDeps.length > 0) console.log('Unused package dependencies: ' + unusedDeps)
+
+  if (missingDeps.length + unusedDeps.length > 0) process.exit(1)
+
+  console.log('Lookin good!')
+}
+
+// Finds all dependencies, required, optional, or dev, in package.json
+function findPackageDeps () {
+  var pkg = JSON.parse(fs.readFileSync('package.json', 'utf8'))
+  var requiredDeps = Object.keys(pkg.dependencies)
+  var devDeps = Object.keys(pkg.devDependencies)
+  var optionalDeps = Object.keys(pkg.optionalDependencies)
+
+  return [].concat(requiredDeps, devDeps, optionalDeps)
+}
+
+// Finds all dependencies required() in the code
+function findJSDeps () {
+  var stdout = cp.execSync('./bin/list-deps.sh')
+  return stdout.toString().trim().split('\n')
+}

bin/list-deps.sh

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+#!/bin/sh
+# This is a truly heinous hack, but it works pretty nicely.
+# Find all modules we're requiring---even conditional requires.
+
+grep "require('" *.js bin/ main/ renderer/ -R |
+    grep '.js:' |
+    sed "s/.*require('\([^'\/]*\).*/\1/" |
+    grep -v '^\.' |
+    sort |
+    uniq