feat(sassoptions): initial directory mount

src/ambient.d.ts

@@ -1 +1,2 @@
 declare module '*/lib/libsass';
+declare module 'nanoid';

src/interop/context.ts

@@ -1,4 +1,7 @@
+import { mountDirectory, unmount } from 'emscripten-wasm-loader';
+import * as nanoid from 'nanoid';
 import { SassAsmModule } from '../SassAsmModule';
+import { log } from '../util/logger';
 import { SassOptions, SassOptionsInterface } from './sassOptions';
 import { wrapSassContext } from './wrapSassContext';
 import { wrapSassOptions } from './wrapSassOptions';
@@ -10,13 +13,20 @@ import { wrapSassOptions } from './wrapSassOptions';
  * @param asmModule
  */
 const buildContext = (asmModule: SassAsmModule) => {
-  const { cwrap } = asmModule;
+  const { cwrap, FS } = asmModule;
   const cwrapCtx = wrapSassContext(cwrap);
   const cwrapOptions = wrapSassOptions(cwrap);
 
+  const nodePathId = `/${nanoid(45)}`;
+  FS.mkdir(nodePathId);
+  log(`buildContext: root mounting point created`, { nodePathId });
+
+  const mountPath = mountDirectory(FS, nodePathId);
+  const unmountPath = unmount(FS, nodePathId);
+
   return {
     options: {
-      create: () => new SassOptions(cwrapCtx, cwrapOptions) as SassOptionsInterface
+      create: () => new SassOptions(cwrapCtx, cwrapOptions, mountPath, unmountPath) as SassOptionsInterface
     }
   };
 };

src/interop/sassOptions.ts

@@ -1,3 +1,4 @@
+import { mountDirectory, unmount } from 'emscripten-wasm-loader';
 import { log } from '../util/logger';
 import { wrapSassContext } from './wrapSassContext';
 import { wrapSassOptions } from './wrapSassOptions';
@@ -67,6 +68,10 @@ class SassOptions implements SassOptionsInterface {
    * Raw pointer to `struct Sass_Options*`
    */
   private readonly sassOptionsPtr: number;
+  /**
+   * List of virtual mounted path.
+   */
+  private readonly mountedPath: Array<string> = [];
   /**
    * Construct new instance of SassOptions.
    *
@@ -78,7 +83,9 @@ class SassOptions implements SassOptionsInterface {
    */
   constructor(
     private readonly cwrapCtx: ReturnType<typeof wrapSassContext>,
-    private readonly cwrapOptions: ReturnType<typeof wrapSassOptions>
+    private readonly cwrapOptions: ReturnType<typeof wrapSassOptions>,
+    private readonly mount: ReturnType<typeof mountDirectory>,
+    private readonly unmountPath: ReturnType<typeof unmount>
   ) {
     this.sassOptionsPtr = cwrapCtx.make_options();
     log(`SassOptions: created new instance`, { sassOptionsPtr: this.sassOptionsPtr });
@@ -122,8 +129,9 @@ class SassOptions implements SassOptionsInterface {
     this.cwrapOptions.option_set_omit_source_map_url(this.sassOptionsPtr, isOmitted);
   }
 
-  public addIncludePath(_includePath: string): void {
-    //TODO: allocate string, mount path
+  public addIncludePath(includePath: string): void {
+    this.mount(includePath);
+    //TODO: allocate string
     //this.cwrapOptions.option_push_include_path(this.sassOptionsPtr);
   }
 
@@ -132,8 +140,9 @@ class SassOptions implements SassOptionsInterface {
   }
 
   public dispose(): void {
-    //TODO: unmount path
     this.cwrapCtx.delete_options(this.sassOptionsPtr);
+    this.mountedPath.forEach(p => this.unmountPath(p));
+
     log(`SassOptions: disposed instance`);
   }
 }