Writing to disk on syncToAst

src/runtime-js.ts

@@ -376,8 +376,10 @@ function valueToAst(value: any): AST {
     throw new Error(`Cannot convert to AST: ${typeof value}`);
 }
 
+let syncTimer: any = null;
+let dirtyModules = new Set<string>();
+
 export function syncToAst(name: string) {
-    // if (definitions.has(name)) {
     if (name in store) {
         const existing = definitions.get(name);
         const newDef: Definition = {
@@ -388,9 +390,20 @@ export function syncToAst(name: string) {
             module: existing?.module,
         };
         definitions.set(name, newDef); // valueToAst(store[name]));
-        // const source = prettyPrint({ kind: 'definition', name, body: definitions.get(name)! });
         const source = prettyPrint(definitions.get(name)!);
         appendChangeLog(name, source);
+
+        // Debounce writes
+        dirtyModules.add(name);
+        if (!syncTimer) {
+            syncTimer = setTimeout(() => {
+                for (const n of dirtyModules) {
+                    syncToFilesystem(n);
+                }
+                dirtyModules.clear();
+                syncTimer = null;
+            }, 2000);
+        }
     }
 }
 
@@ -444,6 +457,7 @@ function syncToFilesystem(name: string) {
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ filename: def.module, content })
         });
+        console.log(`Wrote ${name} to ${def.module}.cg`);
     } else {
         const content = prettyPrint(def) + '\n';
         fetch('/api/save', {
@@ -451,5 +465,6 @@ function syncToFilesystem(name: string) {
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ filename: name, content })
         });
+        console.log(`Wrote ${name} to ${name}.cg`);
     }
 }