Reduce building of PureScript module map

Resolves #59 and resolves #60

1 files changed, 16 insertions, 0 deletions

diff --git a/src/dargs.js b/src/dargs.js
new file mode 100644
index 0000000..e5c574c
--- /dev/null
+++ b/src/dargs.js
@@ -0,0 +1,16 @@
+'use strict';
+
+function dargs(obj) {
+  return Object.keys(obj).reduce((args, key) => {
+    const arg = '--' + key.replace(/[A-Z]/g, '-$&').toLowerCase();
+    const val = obj[key]
+
+    if (key === '_') val.forEach(v => args.push(v))
+    else if (Array.isArray(val)) val.forEach(v => args.push(arg, v))
+    else args.push(arg, obj[key])
+
+    return args.filter(arg => (typeof arg !== 'boolean'))
+  }, [])
+}
+
+module.exports = dargs;