Merge pull request ccxt#3397 from munrocket/master

config for custom bundles including small amount of exchanges

exchanges.cfg

@@ -0,0 +1,8 @@
+# -----------------------------------------------------------------------------
+# You can create a custom bundle of CCXT including only the exchanges you need.
+# Add or uncomment exchanges' ids below and launch `npm run build`.
+# -----------------------------------------------------------------------------
+
+# binance
+# huobi
+# kraken

export-exchanges.js

@@ -36,9 +36,16 @@ function replaceInFile (filename, regex, replacement) {
 
 // ---------------------------------------------------------------------------
 
+const includedIds = fs.readFileSync ('exchanges.cfg')
+                        .toString () // Buffer → String
+                        .split ('\n') // String → Array
+                        .map (line => line.split ('#')[0].trim ()) // trim comments
+                        .filter (exchange => exchange); // filter empty lines
+
+const isIncluded = (id) => ((includedIds.length === 0) || includedIds.includes (id))
 try {
 
-    exchanges = require ('./config')
+    exchanges = require ('./config').ids.filter (isIncluded)
 
 } catch (e) {
 
@@ -47,6 +54,7 @@ try {
     const ids = fs.readdirSync ('./js/')
                   .filter (file => file.includes ('.js'))
                   .map (file => file.slice (0, -3))
+                  .filter (isIncluded);
 
     const pad = function (string, n) {
         return (string + ' '.repeat (n)).slice (0, n)

package.json

@@ -13,7 +13,7 @@
   },
   "readme": "README.md",
   "scripts": {
-    "build": "npm run export-exchanges && npm run vss && npm run pandoc-all && npm run check-js-syntax && npm run transpile && npm run qa && npm run update-badges && npm run browserify",
+    "build": "npm run export-exchanges && npm run vss && npm run check-js-syntax && npm run transpile && npm run qa && npm run pandoc-all && npm run update-badges && npm run browserify",
     "test": "npm run build && node run-tests",
     "fast-test": "node run-tests --js",
     "test-base": "npm run test-js-base && npm run test-python-base && npm run test-php-base",

transpile.js

@@ -689,8 +689,11 @@ function transpileDerivedExchangeFile (folder, filename) {
 
 function transpileDerivedExchangeFiles (folder, pattern = '.js') {
 
+    // exchanges.json accounts for ids included in exchanges.cfg
+    const ids = require ('./exchanges.json').ids;
+
     const classNames = fs.readdirSync (folder)
-        .filter (file => file.includes (pattern))
+        .filter (file => file.includes (pattern) && ids.includes (path.basename (file, pattern)))
         .map (file => transpileDerivedExchangeFile (folder, file))
 
     if (classNames.length === 0)