1 files changed, 38 insertions, 0 deletions
diff --git a/cli_lolcat/hello.go b/cli_lolcat/hello.go
new file mode 100644
index 0000000..1a46da8
--- /dev/null
+++ b/cli_lolcat/hello.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+    "bufio"
+    "fmt"
+    "io"
+    "math"
+    "os"
+)
+
+func rgb(i int) (int, int, int) {
+    var f = 0.1
+    return int(math.Sin(f*float64(i)+0)*127 + 128),
+        int(math.Sin(f*float64(i)+2*math.Pi/3)*127 + 128),
+        int(math.Sin(f*float64(i)+4*math.Pi/3)*127 + 128)
+}
+
+
+func main() {
+    info, _ := os.Stdin.Stat()
+
+    if info.Mode()&os.ModeCharDevice != 0 {
+        fmt.Println("The command is intended to work with pipes.")
+        fmt.Println("Usage: command | gorainbow")
+    }
+
+    reader := bufio.NewReader(os.Stdin)
+    j := 0
+    for {
+        input, _, err := reader.ReadRune()
+        if err != nil && err == io.EOF {
+            break
+        }
+        r, g, b := rgb(j)
+        fmt.Printf("\033[38;2;%d;%d;%dm%c\033[0m", r, g, b, input)
+        j++
+    }
+}