feat: script for removing duplicate values and stripping whitespace

Author: asdofindia

scripts/clean.js

@@ -0,0 +1,36 @@
+const fs = require('fs');
+const filename = process.argv[2];
+if (!filename) {
+    console.error("Please specify filename");
+    process.exit(1);
+}
+const text = fs.readFileSync(filename, 'utf-8');
+const known = {}
+const output = text
+    .split('\n')
+    .map(l => {
+        if (l.startsWith('#')) return l;
+        const [lhs, rhs] = l.split('=').map(w => w.trim());
+        if (lhs) {
+            const previous = known[lhs];
+            if (rhs === previous) return "";
+            if (previous !== undefined) {
+                console.warn(`Caution: More than one mapping detected. Dropping earlier one`)
+                console.warn(`${lhs}=${previous}`)
+                console.warn(`${lhs}=${rhs}`)
+            }
+            known[lhs] = rhs;
+            return `${lhs}=${rhs ?? ""}`
+        } else {
+            return l;
+        }
+    })
+    .filter(l => l !== "")
+    .join('\n')
+
+if (process.argv[3] === "--overwrite") {
+    fs.writeFileSync(filename, output);
+} else {
+    console.log(output);
+}
+