chore: update examples

Author: aleclarson

examples/nebu-strip-dev/index.js

@@ -1,4 +1,5 @@
 {
   "name": "nebu-strip-dev",
-  "version": "1.0.0"
+  "version": "0.1.0",
+  "main": "dist/index.js"
 }

examples/nebu-strip-dev/package.json

@@ -0,0 +1,58 @@
+import { Plugin, Node } from '../../..'
+
+// const re = /(^|(&&|\|\|) )process\.env\.NODE_ENV !==? ['"]production['"]/
+
+export default <Plugin>{
+  IfStatement(node) {
+    let { test } = node
+    if (isDevCondition(test)) {
+      copyAlternate(node)
+      // TODO: Add closing } when parent is an IfStatement.
+      // TODO: Avoid removing alternates when parent is an IfStatement.
+      node.remove()
+    } else {
+      findDevConditions(test)
+    }
+  },
+}
+
+function isDevCondition(cond: Node.Expression) {
+  return (
+    cond.isBinaryExpression() &&
+    cond.operator.startsWith('!=') &&
+    cond.right.isLiteral('string') &&
+    cond.right.value == 'production' &&
+    cond.left.toString() == 'process.env.NODE_ENV'
+  )
+}
+
+function copyAlternate(cond: Node.IfStatement) {
+  const alt = cond.alternate
+  if (!alt) return
+  if (alt.isBlockStatement()) {
+    if (alt.body.length) {
+      // TODO: Preserve blank lines.
+      alt.body.forEach(alt => {
+        cond.after('\n' + alt.toString())
+      })
+    }
+  } else {
+    cond.after('\n' + alt.toString())
+  }
+}
+
+function findDevConditions(cond: Node.Expression) {
+  while (cond.isLogicalExpression()) {
+    // TODO: Remove branch if expression has only && operators.
+    if (isDevCondition(cond.left)) {
+      cond.left.replace('false')
+    } else {
+      findDevConditions(cond.left)
+    }
+    if (isDevCondition(cond.right)) {
+      return cond.right.replace('false')
+    } else {
+      cond = cond.right
+    }
+  }
+}

examples/nebu-strip-dev/src/index.ts

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.json",
+  "include": ["src"],
+  "exclude": [],
+  "compilerOptions": {
+    "outDir": "dist"
+  }
+}

examples/nebu-strip-dev/tsconfig.json

@@ -2,6 +2,10 @@
   "name": "nebu-examples",
   "dependencies": {
     "changed-lines": "^1.0.0",
-    "nebu": "file:.."
+    "nebu": "link:..",
+    "typescript": "link:../node_modules/typescript"
+  },
+  "devDependencies": {
+    "kleur": "^4.1.4"
   }
 }

examples/package.json

@@ -1,46 +1,44 @@
 #!/usr/bin/env node
-const nebu = require('nebu');
+const { nebu } = require('nebu')
 
-let plugin = process.argv[2];
+let plugin = process.argv[2]
 if (!plugin.startsWith('nebu-')) {
-  plugin = 'nebu-' + plugin;
+  plugin = 'nebu-' + plugin
 }
 
-const fs = require('fs');
-const path = require('path');
+const fs = require('fs')
+const path = require('path')
 
-const script = path.resolve(plugin, 'script.js');
-const input = fs.readFileSync(script, 'utf8');
+const script = path.resolve(plugin, 'script.js')
+const input = fs.readFileSync(script, 'utf8')
 
 // For debugging:
-const util = require('util');
-global.inspect = function(obj) {
-  console.log(util.inspect(obj, false, 4, true) + '\n');
+const util = require('util')
+global.inspect = function (obj) {
+  console.log(util.inspect(obj, false, 4, true) + '\n')
 }
 
-const output = nebu.process(input, {
+const { js: output } = nebu.process(input, {
   filename: script,
-  plugins: [
-    require('./' + plugin)
-  ]
-});
+  plugins: [require('./' + plugin)],
+})
 
-const huey = require('huey');
+const k = require('kleur')
 
 // Print the diff before running.
 if (input !== output) {
-  const diff = require('changed-lines');
-  console.log(diff(input, output, huey).join('\n'));
+  const diff = require('changed-lines')
+  console.log(diff(input, output, k).join('\n'))
 } else {
-  console.log(huey.gray('No changes were made.'));
+  console.log(k.gray('No changes were made.'))
 }
 
-console.log('');
-console.log('Testing:', huey.yellow(plugin));
-console.log('');
+console.log('')
+console.log('Testing:', k.yellow(plugin))
+console.log('')
 
-const vm = require('vm');
+const vm = require('vm')
 vm.runInThisContext(output, {
   filename: script,
   displayErrors: true,
-});
+})