Implement completion for fish

shell-integration/fish/vendor_completions.d/clone-in-kitty.fish

@@ -1,7 +1,7 @@
 function __ksi_completions
     set --local ct (commandline --current-token)
     set --local tokens (commandline --tokenize --cut-at-cursor --current-process)
-    printf "%s\n" $tokens $ct | command kitty +complete fish2
+    printf "%s\n" $tokens $ct | command kitty-tool __complete__ fish
 end
 
 complete -f -c clone-in-kitty -a "(__ksi_completions)"

shell-integration/fish/vendor_completions.d/edit-in-kitty.fish

@@ -1,7 +1,7 @@
 function __ksi_completions
     set --local ct (commandline --current-token)
     set --local tokens (commandline --tokenize --cut-at-cursor --current-process)
-    printf "%s\n" $tokens $ct | command kitty +complete fish2
+    printf "%s\n" $tokens $ct | command kitty-tool __complete__ fish
 end
 
 complete -f -c edit-in-kitty -a "(__ksi_completions)"

shell-integration/fish/vendor_completions.d/kitty.fish

@@ -1,7 +1,7 @@
 function __ksi_completions
     set --local ct (commandline --current-token)
     set --local tokens (commandline --tokenize --cut-at-cursor --current-process)
-    printf "%s\n" $tokens $ct | command kitty +complete fish2
+    printf "%s\n" $tokens $ct | command kitty-tool __complete__ fish | source -
 end
 
 complete -f -c kitty -a "(__ksi_completions)"

tools/completion/fish.go

@@ -0,0 +1,45 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package completion
+
+import (
+	"fmt"
+	"strings"
+
+	"kitty/tools/cli/markup"
+	"kitty/tools/utils"
+)
+
+var _ = fmt.Print
+
+func fish_output_serializer(completions []*Completions, shell_state map[string]string) ([]byte, error) {
+	output := strings.Builder{}
+	f := func(format string, args ...interface{}) { fmt.Fprintf(&output, format+"\n", args...) }
+	n := completions[0].Delegate.NumToRemove
+	fm := markup.New(false) // fish freaks out if there are escape codes in the description strings
+	if n > 0 {
+		words := make([]string, len(completions[0].all_words)-n+1)
+		words[0] = completions[0].Delegate.Command
+		copy(words[1:], completions[0].all_words[n:])
+		for i, w := range words {
+			words[i] = fmt.Sprintf("(string escape -- %s)", utils.QuoteStringForFish(w))
+		}
+		cmdline := strings.Join(words, " ")
+		f("set __ksi_cmdline " + cmdline)
+		f("complete -C \"$__ksi_cmdline\"")
+		f("set --erase __ksi_cmdline")
+	} else {
+		for _, mg := range completions[0].Groups {
+			for _, m := range mg.Matches {
+				f("echo -- %s", utils.QuoteStringForFish(m.Word+"\t"+fm.Prettify(m.Description)))
+			}
+		}
+	}
+	// debugf("%#v", output.String())
+	return []byte(output.String()), nil
+}
+
+func init() {
+	input_parsers["fish"] = shell_input_parser
+	output_serializers["fish"] = fish_output_serializer
+}

tools/completion/main.go

@@ -74,6 +74,7 @@ func main(args []string) error {
 	if err != nil {
 		return err
 	}
+	// debugf("%#v", string(data))
 	all_argv, err := input_parser(data, shell_state)
 	if err != nil {
 		return err