From 5063cdbf4062ea99962f974cd04c5816a587ca7f Mon Sep 17 00:00:00 2001
From: oabrivard <olivier@abrivard.fr>
Date: Thu, 31 Oct 2024 12:00:18 +0100
Subject: [PATCH] Initialize project

---
 .gitignore |  6 +++---
 README.md  | 18 +++++++++++++++++-
 go.mod     |  3 +++
 lox/lox.go | 40 ++++++++++++++++++++++++++++++++++++++++
 main.go    | 21 +++++++++++++++++++++
 5 files changed, 84 insertions(+), 4 deletions(-)
 create mode 100644 go.mod
 create mode 100644 lox/lox.go
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
index a09fef2..78a0187 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,10 +14,9 @@
 settings.json
 
 # ---> Go
-# If you prefer the allow list template instead of the deny list, see community template:
-# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
-#
+
 # Binaries for programs and plugins
+bin/
 *.exe
 *.exe~
 *.dll
@@ -36,3 +35,4 @@ settings.json
 # Go workspace file
 go.work
 
+# <--- Go
diff --git a/README.md b/README.md
index 2a8ece6..ce3c4e9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,19 @@
 # golox
 
-Lox implementation in Golang
\ No newline at end of file
+Lox implementation in Golang
+
+Build with:
+
+```
+go build -o bin/golox
+```
+
+Run with no arguments for prompt interpreter:
+```
+bin/golox
+```
+
+Or with script name for script execution:
+```
+bin/golox lox_script_name
+```
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..4418f9c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module golox
+
+go 1.23.2
diff --git a/lox/lox.go b/lox/lox.go
new file mode 100644
index 0000000..f4148dd
--- /dev/null
+++ b/lox/lox.go
@@ -0,0 +1,40 @@
+package lox
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func RunFile(path string) {
+	bytes, err := os.ReadFile(path)
+	if err != nil {
+		fmt.Println("Error reading file", path)
+		os.Exit(74)
+	}
+	run(string(bytes))
+}
+
+func RunPrompt() {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		fmt.Print("> ")
+
+		line, err := reader.ReadString('\n')
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(74)
+		}
+
+		if line == "\n" {
+			break
+		}
+
+		run(line)
+	}
+}
+
+func run(source string) {
+	fmt.Println(source)
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..b539208
--- /dev/null
+++ b/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"golox/lox"
+)
+
+func main() {
+	nbArgs := len(os.Args)
+
+	if nbArgs > 2 {
+		fmt.Println("Usage: golox [script]")
+		os.Exit(64)
+	} else if nbArgs == 2 {
+		lox.RunFile(os.Args[1])
+	} else {
+		lox.RunPrompt()
+	}
+}