feat: initial commit

go.mod

@@ -0,0 +1,3 @@
+module github.com/chenasraf/treelike
+
+go 1.22.3

treelike.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func helpText() {
+	fmt.Println("Usage: treelike [OPTIONS] [PATH]")
+}
+
+func main() {
+	args := os.Args[1:]
+	fromStdin := false
+	fromFile := ""
+	_ = fromFile
+
+	var input strings.Builder
+
+	for len(args) > 0 {
+		switch args[0] {
+		case "-h", "--help":
+			{
+				helpText()
+				os.Exit(0)
+			}
+		case "-", "--stdin":
+			{
+				fromStdin = true
+				args = args[1:]
+			}
+		case "-f", "--file":
+			{
+				fromFile = args[1]
+				args = args[1:]
+			}
+		default:
+			{
+				input.WriteString(args[0] + "\n")
+				args = args[1:]
+			}
+		}
+	}
+
+	if fromStdin {
+		scanner := bufio.NewScanner(os.Stdin)
+		for scanner.Scan() {
+			input.WriteString(scanner.Text() + "\n")
+		}
+		if err := scanner.Err(); err != nil {
+			fmt.Fprintln(os.Stderr, "Error reading from stdin:", err)
+			os.Exit(1)
+		}
+	} else if fromFile != "" {
+		file, err := os.Open(fromFile)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error opening file %s: %v\n", fromFile, err)
+			os.Exit(1)
+		}
+		defer file.Close()
+		scanner := bufio.NewScanner(file)
+		for scanner.Scan() {
+			input.WriteString(scanner.Text() + "\n")
+		}
+		if err := scanner.Err(); err != nil {
+			fmt.Fprintln(os.Stderr, "Error reading from file:", err)
+			os.Exit(1)
+		}
+	} else {
+		helpText()
+		os.Exit(1)
+	}
+	fmt.Printf("input:\n%s", input.String())
+}