feat(sys): add encoding option to readFile

src/declarations/stencil-public-compiler.ts

@@ -886,7 +886,7 @@ export interface CompilerSystem {
   /**
    * Generates a MD5 digest encoded as HEX
    */
-  generateContentHash?(content: string, length?: number): Promise<string>;
+  generateContentHash?(content: string | any, length?: number): Promise<string>;
   /**
    * Get the current directory.
    */
@@ -939,7 +939,9 @@ export interface CompilerSystem {
   /**
    * Returns undefined if file is not found. Does not throw.
    */
-  readFile(p: string, encoding?: string): Promise<string>;
+  readFile(p: string): Promise<string>;
+  readFile(p: string, encoding: 'utf8'): Promise<string>;
+  readFile(p: string, encoding: 'binary'): Promise<any>;
   /**
    * SYNC! Returns undefined if file is not found. Does not throw.
    */

src/sys/deno/deno-sys.ts

@@ -341,10 +341,13 @@ export function createDenoSys(c: { Deno?: any } = {}) {
       } catch (e) {}
       return dirEntries;
     },
-    async readFile(p) {
+    async readFile(p: string, encoding?: string) {
       try {
-        const decoder = new TextDecoder('utf-8');
         const data = await deno.readFile(p);
+        if (encoding === 'binary') {
+          return data as any;
+        }
+        const decoder = new TextDecoder('utf-8');
         return decoder.decode(data);
       } catch (e) {}
       return undefined;

src/sys/node/node-sys.ts

@@ -250,8 +250,15 @@ export function createNodeSys(c: { process?: any } = {}) {
       } catch (e) {}
       return [];
     },
-    readFile(p) {
-      return new Promise(resolve => {
+    readFile(p: string, encoding?: string) {
+      if (encoding === 'binary') {
+        return new Promise<any>(resolve => {
+          fs.readFile(p, (_, data) => {
+            resolve(data);
+          });
+        });
+      }
+      return new Promise<string>(resolve => {
         fs.readFile(p, 'utf8', (_, data) => {
           resolve(data);
         });