Start work on porting themes kitten to Go

tools/cmd/completion/kitty.go

@@ -4,11 +4,10 @@ package completion
 
 import (
 	"fmt"
-	"os/exec"
 	"strings"
 
 	"kitty/tools/cli"
-	"kitty/tools/utils"
+	"kitty/tools/themes"
 )
 
 var _ = fmt.Print
@@ -64,20 +63,7 @@ func complete_plus_open(completions *cli.Completions, word string, arg_num int)
 }
 
 func complete_themes(completions *cli.Completions, word string, arg_num int) {
-	kitty := utils.KittyExe()
-	if kitty != "" {
-		out, err := exec.Command(kitty, "+runpy", "from kittens.themes.collection import *; print_theme_names()").Output()
-		if err == nil {
-			mg := completions.AddMatchGroup("Themes")
-			scanner := utils.NewLineScanner(utils.UnsafeBytesToString(out))
-			for scanner.Scan() {
-				theme_name := strings.TrimSpace(scanner.Text())
-				if theme_name != "" && strings.HasPrefix(theme_name, word) {
-					mg.AddMatch(theme_name)
-				}
-			}
-		}
-	}
+	themes.CompleteThemes(completions, word, arg_num)
 }
 
 func EntryPoint(tool_root *cli.Command) {

tools/cmd/themes/main.go

@@ -0,0 +1,62 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package themes
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"kitty/tools/cli"
+	"kitty/tools/themes"
+	"kitty/tools/utils"
+)
+
+var _ = fmt.Print
+
+func complete_themes(completions *cli.Completions, word string, arg_num int) {
+	themes.CompleteThemes(completions, word, arg_num)
+}
+
+func non_interactive(opts *Options, theme_name string) (rc int, err error) {
+	themes, closer, err := themes.LoadThemes(time.Duration(opts.CacheAge * float64(time.Hour*24)))
+	if err != nil {
+		return 1, err
+	}
+	defer closer.Close()
+	theme := themes.ThemeByName(theme_name)
+	if theme == nil {
+		theme_name = strings.ReplaceAll(theme_name, `\`, ``)
+		theme = themes.ThemeByName(theme_name)
+		if theme == nil {
+			return 1, fmt.Errorf("No theme named: %s", theme_name)
+		}
+	}
+	if opts.DumpTheme {
+		code, err := theme.Code()
+		if err != nil {
+			return 1, err
+		}
+		fmt.Println(code)
+	} else {
+		err = theme.SaveInConf(utils.ConfigDir(), opts.ReloadIn, opts.ConfigFileName)
+		if err != nil {
+			return 1, err
+		}
+	}
+	return
+}
+
+func main(_ *cli.Command, opts *Options, args []string) (rc int, err error) {
+	if len(args) > 1 {
+		args = []string{strings.Join(args, ` `)}
+	}
+	if len(args) == 1 {
+		return non_interactive(opts, args[0])
+	}
+	return
+}
+
+func EntryPoint(parent *cli.Command) {
+	create_cmd(parent, main)
+}

tools/cmd/tool/main.go

@@ -15,6 +15,7 @@ import (
 	"kitty/tools/cmd/icat"
 	"kitty/tools/cmd/pytest"
 	"kitty/tools/cmd/ssh"
+	"kitty/tools/cmd/themes"
 	"kitty/tools/cmd/unicode_input"
 	"kitty/tools/cmd/update_self"
 	"kitty/tools/tui"
@@ -45,6 +46,8 @@ func KittyToolEntryPoints(root *cli.Command) {
 	ask.EntryPoint(root)
 	// hints
 	hints.EntryPoint(root)
+	// themes
+	themes.EntryPoint(root)
 	// __pytest__
 	pytest.EntryPoint(root)
 	// __hold_till_enter__