feat: initial goget release — modern IPv6-first download utility

internal/cli/help.go

@@ -0,0 +1,85 @@
+//go:build linux || freebsd
+// +build linux freebsd
+
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// PrintError prints an error with color styling
+func PrintError(w io.Writer, err error) {
+	prefix, suffix := "", ""
+	if isColorTerminal(w) {
+		prefix = ColorRed + ColorBold
+		suffix = ColorReset
+	}
+	fmt.Fprintf(w, "%s✗ Error:%s %v\n", prefix, suffix, err)
+}
+
+// PrintWarning prints a warning with color styling
+func PrintWarning(w io.Writer, msg string) {
+	prefix, suffix := "", ""
+	if isColorTerminal(w) {
+		prefix = ColorYellow + ColorBold
+		suffix = ColorReset
+	}
+	fmt.Fprintf(w, "%s⚠ Warning:%s %s\n", prefix, suffix, msg)
+}
+
+// PrintSuccess prints a success message with color styling
+func PrintSuccess(w io.Writer, msg string) {
+	prefix, suffix := "", ""
+	if isColorTerminal(w) {
+		prefix = ColorGreen + ColorBold
+		suffix = ColorReset
+	}
+	fmt.Fprintf(w, "%s✓%s %s\n", prefix, suffix, msg)
+}
+
+// PrintInfo prints an info message with color styling
+func PrintInfo(w io.Writer, msg string) {
+	prefix, suffix := "", ""
+	if isColorTerminal(w) {
+		prefix = ColorCyan + ColorBold
+		suffix = ColorReset
+	}
+	fmt.Fprintf(w, "%sℹ%s %s\n", prefix, suffix, msg)
+}
+
+// FormatError formats an error with context
+func FormatError(err error, context string) error {
+	if context == "" {
+		return err
+	}
+	return fmt.Errorf("%s: %w", context, err)
+}
+
+// IsTerminal checks if the writer is a terminal
+func IsTerminal(w io.Writer) bool {
+	_, ok := w.(*os.File)
+	return ok && os.Getenv("TERM") != "dumb"
+}
+
+// Colorize wraps text in ANSI color codes if the writer supports it
+func Colorize(w io.Writer, colorCode, text string) string {
+	if !isColorTerminal(w) {
+		return text
+	}
+	return colorCode + text + ColorReset
+}
+
+// Indent returns text indented by the specified number of spaces
+func Indent(text string, spaces int) string {
+	indent := strings.Repeat(" ", spaces)
+	lines := strings.Split(text, "\n")
+	for i, line := range lines {
+		if line != "" {
+			lines[i] = indent + line
+		}
+	}
+	return strings.Join(lines, "\n")
+}