Initial Navis client with NaiveProxy, profiles, ping and git updates

Co-authored-by: Cursor <cursoragent@cursor.com>

tools/mkico/main.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+	"image"
+	"image/png"
+	"os"
+	"path/filepath"
+
+	"golang.org/x/image/draw"
+)
+
+func main() {
+	in := filepath.Join("assets", "navis-icon.png")
+	out := filepath.Join("assets", "navis.ico")
+	f, err := os.Open(in)
+	if err != nil {
+		fatal(err)
+	}
+	defer f.Close()
+	src, err := png.Decode(f)
+	if err != nil {
+		fatal(err)
+	}
+
+	sizes := []int{16, 32, 48, 64, 128, 256}
+	type entry struct {
+		size int
+		png  []byte
+	}
+	var entries []entry
+	for _, size := range sizes {
+		dst := image.NewRGBA(image.Rect(0, 0, size, size))
+		draw.CatmullRom.Scale(dst, dst.Bounds(), src, src.Bounds(), draw.Over, nil)
+		tmp := filepath.Join(os.TempDir(), fmt.Sprintf("navis-%d.png", size))
+		tf, err := os.Create(tmp)
+		if err != nil {
+			fatal(err)
+		}
+		if err := png.Encode(tf, dst); err != nil {
+			tf.Close()
+			fatal(err)
+		}
+		tf.Close()
+		b, err := os.ReadFile(tmp)
+		_ = os.Remove(tmp)
+		if err != nil {
+			fatal(err)
+		}
+		entries = append(entries, entry{size: size, png: b})
+	}
+
+	var blob []byte
+	offset := 6 + 16*len(entries)
+	for _, e := range entries {
+		blob = append(blob, e.png...)
+	}
+
+	buf := make([]byte, offset+len(blob))
+	binary.LittleEndian.PutUint16(buf[0:], 0) // reserved
+	binary.LittleEndian.PutUint16(buf[2:], 1) // icon
+	binary.LittleEndian.PutUint16(buf[4:], uint16(len(entries)))
+	dataOff := offset
+	for i, e := range entries {
+		dir := buf[6+i*16:]
+		w, h := e.size, e.size
+		if w >= 256 {
+			dir[0], dir[1] = 0, 0
+		} else {
+			dir[0], dir[1] = byte(w), byte(h)
+		}
+		dir[2] = 0 // colors
+		dir[3] = 0
+		binary.LittleEndian.PutUint16(dir[4:], 1) // planes
+		binary.LittleEndian.PutUint16(dir[6:], 32)
+		binary.LittleEndian.PutUint32(dir[8:], uint32(len(e.png)))
+		binary.LittleEndian.PutUint32(dir[12:], uint32(dataOff))
+		copy(buf[dataOff:], e.png)
+		dataOff += len(e.png)
+	}
+	if err := os.WriteFile(out, buf, 0o644); err != nil {
+		fatal(err)
+	}
+	fmt.Println("wrote", out)
+}
+
+func fatal(err error) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}