scripts: allow passing the spec as an argument

Author: OrKoN

scripts/cddl/generate.js

@@ -1,12 +1,20 @@
 #!/usr/bin/env node
 
+/**
+ * Usage: node generate.js [pathToSpec]
+ *
+ * Parameters
+ *
+ * - pathToSpec: a path to the specification to extract CDDL definitions from. Default: _dirname/../../index.bs.
+ */
+
 const fs = require('fs')
 const path = require('path')
 const parse5 = require('parse5')
 
 const { getCDDLNodes } = require('./utils')
 
-const spec = path.resolve(__dirname, '..', '..', 'index.bs')
+const spec = process.argv[2] || path.resolve(__dirname, '..', '..', 'index.bs')
 const specContent = fs.readFileSync(spec, 'utf-8')
 const specParsed = parse5.parse(specContent)