mirror of
https://github.com/kovidgoyal/kitty.git
synced 2024-08-16 18:10:32 +03:00
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
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package cli
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import (
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"encoding/json"
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"fmt"
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"io"
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"os"
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"strings"
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)
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func json_input_parser(data []byte, shell_state map[string]string) ([][]string, error) {
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ans := make([][]string, 0, 32)
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err := json.Unmarshal(data, &ans)
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return ans, err
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}
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func json_output_serializer(completions []*Completions, shell_state map[string]string) ([]byte, error) {
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return json.Marshal(completions)
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}
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type completion_script_func func(commands []string) (string, error)
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type parser_func func(data []byte, shell_state map[string]string) ([][]string, error)
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type serializer_func func(completions []*Completions, shell_state map[string]string) ([]byte, error)
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var completion_scripts = make(map[string]completion_script_func, 4)
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var input_parsers = make(map[string]parser_func, 4)
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var output_serializers = make(map[string]serializer_func, 4)
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var init_completions = make(map[string]func(*Completions), 4)
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func init() {
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input_parsers["json"] = json_input_parser
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output_serializers["json"] = json_output_serializer
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}
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var registered_exes []func(root *Command)
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func RegisterExeForCompletion(x func(root *Command)) {
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if registered_exes == nil {
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registered_exes = make([]func(root *Command), 0, 4)
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}
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registered_exes = append(registered_exes, x)
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}
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func GenerateCompletions(args []string) error {
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output_type := "json"
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if len(args) > 0 {
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output_type = args[0]
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args = args[1:]
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}
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n := len(args)
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if n < 1 {
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n = 1
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}
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if output_type == "setup" {
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if len(args) == 0 {
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return fmt.Errorf("The shell must be specified")
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}
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shell_name := args[0]
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args = args[1:]
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completion_script := completion_scripts[shell_name]
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if completion_script == nil {
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return fmt.Errorf("Unsupported shell: %s", shell_name)
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}
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output, err := completion_script(args)
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if err == nil {
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_, err = os.Stdout.WriteString(output)
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}
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return err
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}
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shell_state := make(map[string]string, n)
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for _, arg := range args {
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k, v, found := strings.Cut(arg, "=")
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if !found {
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return fmt.Errorf("Invalid shell state specification: %s", arg)
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}
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shell_state[k] = v
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}
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input_parser := input_parsers[output_type]
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output_serializer := output_serializers[output_type]
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if input_parser == nil || output_serializer == nil {
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return fmt.Errorf("Unknown output type: %s", output_type)
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}
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data, err := io.ReadAll(os.Stdin)
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if err != nil {
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return err
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}
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// debugf("%#v", string(data))
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all_argv, err := input_parser(data, shell_state)
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if err != nil {
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return err
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}
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var root = NewRootCommand()
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for _, re := range registered_exes {
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re(root)
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}
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err = root.Validate()
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if err != nil {
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return err
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}
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all_completions := make([]*Completions, 0, 1)
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for _, argv := range all_argv {
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all_completions = append(all_completions, root.GetCompletions(argv, init_completions[output_type]))
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root.ResetAfterParseArgs()
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}
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output, err := output_serializer(all_completions, shell_state)
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if err == nil {
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_, err = os.Stdout.Write(output)
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}
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return err
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}
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