Implement Host#directoryExists to support @types discovery, fix #422

ivogabe · ivogabe · commit d706e30c214c · 2016-10-01T19:41:24.000+02:00
diff --git a/lib/host.ts b/lib/host.ts
@@ -84,11 +84,9 @@ export class Host implements ts.CompilerHost {
 		return this.fallback.getSourceFile(fileName, languageVersion, onError);
 	}
 
-	realpath = (path: string) => {
-		return this.fallback.realpath(path);
-	}
+	realpath = (path: string) => this.fallback.realpath(path);
 
-	getDirectories = (path: string) => {
-		return this.fallback.getDirectories(path);
-	}
+	getDirectories = (path: string) => this.fallback.getDirectories(path);
+
+	directoryExists = (path: string) => this.fallback.directoryExists(path);
 }

Original file line number	Diff line number	Diff line change
`@@ -84,11 +84,9 @@ export class Host implements ts.CompilerHost {`
`84`	`84`	`return this.fallback.getSourceFile(fileName, languageVersion, onError);`
`85`	`85`	`}`
`86`	`86`
`87`		`- realpath = (path: string) => {`
`88`		`- return this.fallback.realpath(path);`
`89`		`- }`
	`87`	`+ realpath = (path: string) => this.fallback.realpath(path);`
`90`	`88`
`91`		`- getDirectories = (path: string) => {`
`92`		`- return this.fallback.getDirectories(path);`
`93`		`- }`
	`89`	`+ getDirectories = (path: string) => this.fallback.getDirectories(path);`
	`90`	`+`
	`91`	`+ directoryExists = (path: string) => this.fallback.directoryExists(path);`
`94`	`92`	`}`