[CLI] Introduce Arguments Parsing Engine #37

hexa.json

@@ -27,6 +27,7 @@
 		"data/compilerError",
 		"data/hints",
 		"targets",
+		"cli/args",
 		"cli/help",
 		"repl",
 		"main",

source/cli.hexa

@@ -1,5 +1,5 @@
 // The Hexa Compiler
-// Copyright (C) 2021-2022 Oleh Petrenko
+// Copyright (C) 2021-2023 Oleh Petrenko
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Lesser General Public License as published by
@@ -17,13 +17,7 @@
 // Pre-parse command line arguments and decide what to do
 
 {
-	// Cleanup argv
-	if process.argv[0].endsWith('node.exe') || process.argv[0].endsWith('node') {
-		process.argv.shift()
-		process.argv.shift()
-	} else if process.argv[0].endsWith(/*hexa*/'.exe') {
-		process.argv.shift()
-	}
+	ArgumentsParsingEngine.engage()
 
 	// Entry point
 	// TODO support `ignoreArguments` feature here

source/cli/args.hexa

@@ -0,0 +1,40 @@
+// The Hexa Compiler
+// Copyright (C) 2023 Oleh Petrenko
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, version 3 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+/// Ignores some parts like leading .exe and .js
+class ArgumentsParsingEngine {
+
+	/// Do this before any parsing
+	static fun cleanupArgv() {
+		if process.argv[0].endsWith('node.exe') || process.argv[0].endsWith('node') {
+			process.argv.shift()
+			// The second one is .js file
+			process.argv.shift()
+		} else if process.argv[0].endsWith(/*hexa*/'.exe') {
+			process.argv.shift()
+			// TODO should be null-guarded after null-checks of `[]` enabled
+			// `process.argv?[0].endsWith('.js')`
+			if process.argv[0] != null, process.argv[0].endsWith('.js') {
+				// The second one is .js file when bundled wih N-EXE
+				process.argv.shift()
+			}
+		}
+	}
+
+	/// Entry point
+	static fun engage() {
+		cleanupArgv()
+	}
+}