generate lib/index.js from a template and a list of aliases

1 files changed, 66 insertions, 0 deletions

diff --git a/support/generate-index.js b/support/generate-index.js
new file mode 100644
index 0000000..4154d03
--- /dev/null
+++ b/support/generate-index.js
@@ -0,0 +1,66 @@
+#!/usr/bin/env node
+'use strict'
+
+const fs = require('fs')
+const path = require('path')
+require('babel-core/register')
+const autoInject = require('../lib/autoInject').default
+
+generateIndex(err => {
+    if (err) throw err
+})
+
+function generateIndex(cb) {
+    autoInject({
+        entries: cb => readEntries(cb),
+        aliases: cb => cb(null, require('./aliases')),
+        template: cb => fs.readFile(path.join(__dirname, './index-template.js'), 'utf8', cb),
+        generated: (entries, aliases, template, cb) => {
+            cb(null, renderTemplate(entries, aliases, template))
+        }
+    }, (err, results) => {
+        if (err) return cb(err)
+        console.log(results.generated)
+    })
+}
+
+function readEntries (cb) {
+    const libDir = path.join(__dirname, '../lib')
+    fs.readdir(libDir, (err, files) => {
+        if (err) return cb(err)
+        cb(null, files
+            .map(file => path.basename(file, '.js'))
+            .filter(file => !file.match(/(^(index|internal)$)/)))
+    })
+}
+
+function renderTemplate(entries, aliases, template) {
+    return template
+        .replace(
+            `/*__imports__*/`,
+            entries
+                .map(entry => `import ${entry} from './${entry}'`)
+                .join('\n'))
+        .replace(
+            `/*__default_object__*/`,
+            entries
+                .map(entry => `    ${entry}: ${entry}`)
+                .join(',\n') + ',')
+
+        .replace(
+            `/*__default_aliases__*/`,
+            Object.keys(aliases)
+                .map(alias => `    ${alias}: ${aliases[alias]}`)
+                .join(',\n'))
+        .replace(
+            `/*__exports__*/`,
+            entries
+                .map(entry => `    ${entry} as ${entry}`)
+                .join(',\n') + ',')
+
+        .replace(
+            `/*__alias_exports__*/`,
+            Object.keys(aliases)
+                .map(alias => `    ${aliases[alias]} as ${alias}`)
+                .join(',\n'))
+}