Work on merging completion tree with parse tree

tools/cli/bash.go

@@ -0,0 +1,57 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package cli
+
+import (
+	"fmt"
+	"strings"
+
+	"kitty/tools/utils"
+)
+
+var _ = fmt.Print
+
+func bash_output_serializer(completions []*Completions, shell_state map[string]string) ([]byte, error) {
+	output := strings.Builder{}
+	f := func(format string, args ...any) { fmt.Fprintf(&output, format+"\n", args...) }
+	n := completions[0].Delegate.NumToRemove
+	if n > 0 {
+		f("compopt +o nospace")
+		f("COMP_WORDS[%d]=%s", n, utils.QuoteStringForSH(completions[0].Delegate.Command))
+		f("_command_offset %d", n)
+	} else {
+		for _, mg := range completions[0].Groups {
+			mg.remove_common_prefix()
+			if mg.NoTrailingSpace {
+				f("compopt -o nospace")
+			} else {
+				f("compopt +o nospace")
+			}
+			if mg.IsFiles {
+				f("compopt -o filenames")
+				for _, m := range mg.Matches {
+					if strings.HasSuffix(m.Word, utils.Sep) {
+						m.Word = m.Word[:len(m.Word)-1]
+					}
+				}
+			} else {
+				f("compopt +o filenames")
+			}
+			for _, m := range mg.Matches {
+				f("COMPREPLY+=(%s)", utils.QuoteStringForSH(m.Word))
+			}
+		}
+	}
+	// debugf("%#v", output.String())
+	return []byte(output.String()), nil
+}
+
+func bash_init_completions(completions *Completions) {
+	completions.split_on_equals = true
+}
+
+func init() {
+	input_parsers["bash"] = shell_input_parser
+	output_serializers["bash"] = bash_output_serializer
+	init_completions["bash"] = bash_init_completions
+}