2 files changed, 44 insertions(+), 0 deletions(-)

A go.mod
A main.go

@@ 1,3 @@
+module git.sr.ht/~kota/vt-color
+
+go 1.20

@@ 1,41 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func usage() {
+	fmt.Println("usage: vt-color [BLACK] [RED] [GREEN] [YELLOW] [BLUE] [MAGENTA] [CYAN] [WHITE] [LIGHT_BLACK] [LIGHT_RED] [LIGHT_GREEN] [LIGHT_YELLOW] [LIGHT_BLUE] [LIGHT_MAGENTA] [LIGHT_CYAN] [LIGHT_WHITE]")
+}
+
+func main() {
+	if len(os.Args) != 17 {
+		usage()
+		os.Exit(1)
+	}
+
+	var red []string
+	var green []string
+	var blue []string
+	for _, color := range os.Args[1:] {
+		if len(color) != 6 {
+			log.Fatalf("color %v is malformed: use the form RRGGBB", color)
+		}
+
+		r, _ := strconv.ParseUint(color[0:2], 16, 64)
+		g, _ := strconv.ParseUint(color[2:4], 16, 64)
+		b, _ := strconv.ParseUint(color[4:6], 16, 64)
+
+		red = append(red, strconv.FormatUint(r, 10))
+		green = append(green, strconv.FormatUint(g, 10))
+		blue = append(blue, strconv.FormatUint(b, 10))
+	}
+
+	fmt.Println("red: ", strings.Join(red, ","))
+	fmt.Println("grn: ", strings.Join(green, ","))
+	fmt.Println("blu: ", strings.Join(blue, ","))
+}