refactor(spec): seperate into small files

commands/core/utils.go

@@ -0,0 +1,64 @@
+package core
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+var DebugWriter io.Writer
+
+func debugLog(format string, a ...interface{}) {
+	if DebugWriter != nil {
+		fmt.Fprintf(DebugWriter, format+"\n", a...)
+	}
+}
+
+// tokenize parses the input string into shell-like tokens handling quotes
+// example: tokenize("git commit -m \"hello world\"")
+func tokenize(s string) []string {
+	tokens := []string{}
+	var current strings.Builder
+	inQuote := false
+	var quoteChar rune
+
+	for _, c := range s {
+		switch {
+		case !inQuote && (c == '"' || c == '\''):
+			inQuote = true
+			quoteChar = c
+		case inQuote && c == quoteChar:
+			inQuote = false
+		case c == ' ' && !inQuote:
+			if current.Len() > 0 {
+				tokens = append(tokens, current.String())
+				current.Reset()
+			}
+		default:
+			current.WriteRune(c)
+		}
+	}
+
+	tokens = append(tokens, current.String())
+	return tokens
+}
+
+// hasPrefix checks if s starts with prefix using case-insensitive matching
+func hasPrefix(s, prefix string) bool {
+	if len(prefix) > len(s) {
+		return false
+	}
+	for i := 0; i < len(prefix); i++ {
+		a, b := s[i], prefix[i]
+		if a >= 'A' && a <= 'Z' {
+			a += 32
+		}
+		if b >= 'A' && b <= 'Z' {
+			b += 32
+		}
+		if a != b {
+			return false
+		}
+	}
+	return true
+}