fix foundry

libs/remixd/src/services/foundryClient.ts

@@ -32,7 +32,28 @@ export class FoundryClient extends PluginClient {
     this.currentSharedFolder = currentSharedFolder
     this.buildPath = utils.absolutePath('out', this.currentSharedFolder)
     this.cachePath = utils.absolutePath('cache', this.currentSharedFolder)
+    if (fs.existsSync(this.buildPath) && fs.existsSync(this.cachePath)) {
       this.listenOnFoundryCompilation()
+    } else {
+      console.log('Foundry out folder doesn\'t exist... waiting for the first compilation.')
+      this.listenOFoundryFolder()
+    }
+
+  }
+
+  listenOFoundryFolder() {
+    try {
+      this.watcher = chokidar.watch(this.currentSharedFolder, { depth: 1, ignorePermissionErrors: true, ignoreInitial: true })
+      // watch for new folders
+      this.watcher.on('addDir', (path) => {
+        if (fs.existsSync(this.buildPath) && fs.existsSync(this.cachePath)) {
+          this.buildPath = path
+          this.listenOnFoundryCompilation()
+        }
+      })
+    } catch (e) {
+      console.log(e)
+    }
   }
 
   compile(configPath: string) {
@@ -64,6 +85,8 @@ export class FoundryClient extends PluginClient {
 
   private async processArtifact() {
     const folderFiles = await fs.readdir(this.buildPath) // "out" folder
+    if (!fs.existsSync(join(this.cachePath, 'solidity-files-cache.json'))) return
+    try {
       const cache = JSON.parse(await fs.readFile(join(this.cachePath, 'solidity-files-cache.json'), { encoding: 'utf-8' }))
      
       // name of folders are file names
@@ -86,6 +109,9 @@ export class FoundryClient extends PluginClient {
         this.call('terminal', 'log', { type: 'log', value: 'receiving compilation result from Foundry' })
         this.warnlog = true
       }
+    } catch (e) {
+      console.log(e)
+    }
   }
 
   listenOnFoundryCompilation() {