Fixed PKG_EXECPATH bug and added include directive

cli.mjs

@@ -71,8 +71,11 @@ await new Promise((resolve, reject) => {
 
 // Spawn child process to execute script
 let child = spawn(
-  path,
-  scriptArgs, {
+  '/usr/bin/env', [
+    '-u', 'PKG_EXECPATH',
+    path,
+    ...scriptArgs
+  ], {
     stdio: 'inherit',
     argv0: fileName
   }

src/character_stream.mjs

@@ -37,9 +37,9 @@ export class CharacterStream {
   }
 
   // Peek first character after any characters that match predicate
-  peekAfter(predicate) {
+  peekAfter(predicate, length = 1) {
     const skip = this.peekWhile(predicate);
-    return this.peek(skip.length + 1).substring(skip.length);
+    return this.peek(skip.length + length).substring(skip.length);
   }
 
   isNext(str) {

src/template_engine.mjs

@@ -45,6 +45,9 @@ export class TemplateEngine {
         case 'comment':
           buffer += this._renderComment(token.value);
           break;
+        case 'source':
+          buffer += this._renderSource(token.value);
+          break;
         default:
           throw new Error(`Unrecognized token: ${token.type}`);
       }
@@ -61,6 +64,10 @@ export class TemplateEngine {
     return `# ${value}\n`;
   }
 
+  _renderSource(value) {
+    return `source <(n0m -c "${value.trim()}")\n`;
+  }
+
   _renderStatement(value) {
     return `${value}\n`;
   }

src/token_stream.mjs

@@ -15,6 +15,7 @@ export class TokenStream {
   static CLOSE_INLINE_STATEMENT_UNESCAPED = '%>';
   static STATEMENT = '$';
   static COMMENT = '#';
+  static SOURCE = '.INCLUDE';
 
   constructor() {
     this.reset();
@@ -73,7 +74,8 @@ export class TokenStream {
         TokenStream.OPEN_INLINE_STATEMENT,
         TokenStream.OPEN_INLINE_STATEMENT_UNESCAPED,
         TokenStream.STATEMENT,
-        TokenStream.COMMENT
+        TokenStream.COMMENT,
+        TokenStream.SOURCE
       ])) {
         // Skip escape
         this._cs.next(TokenStream.ESCAPE.length);
@@ -89,16 +91,12 @@ export class TokenStream {
         return flushRaw() || this._readInlineStatement();
       } else if (this._cs.isNext(TokenStream.OPEN_INLINE_STATEMENT_UNESCAPED)) {
         return flushRaw() || this._readInlineStatementUnescaped();
-      } else if (
-        this._cs.column === 0 &&
-        this._cs.peekAfter(this._isSpace) === TokenStream.STATEMENT
-      ) {
+      } else if (this._matchFullLine(TokenStream.STATEMENT)) {
         return flushRaw() || this._readStatement();
-      } else if (
-        this._cs.column === 0 &&
-        this._cs.peekAfter(this._isSpace) === TokenStream.COMMENT
-      ) {
+      } else if (this._matchFullLine(TokenStream.COMMENT)) {
         return flushRaw() || this._readComment();
+      } else if (this._matchFullLine(TokenStream.SOURCE)) {
+        return flushRaw() || this._readSource();
       } else {
         raw += this._cs.next();
       }
@@ -248,6 +246,13 @@ export class TokenStream {
     );
   }
 
+  _readSource() {
+    return this._readFullLineGeneric(
+      'source',
+      TokenStream.SOURCE
+    );
+  }
+
   // Utility methods
   _isSpace(c) {
     return /[^\S\r\n]/.test(c);
@@ -260,4 +265,11 @@ export class TokenStream {
       this._cs.isNext(TokenStream.ESCAPE + tag)
     );
   }
+
+  _matchFullLine(tag) {
+    return (
+      this._cs.column === 0 &&
+      this._cs.peekAfter(this._isSpace, tag.length) === tag
+    );
+  }
 }