package main import ( "errors" "path/filepath" "strings" "os" "hilbish/util" rt "github.com/arnodel/golua/runtime" ) var charEscapeMap = []string{ "\"", "\\\"", "'", "\\'", "`", "\\`", " ", "\\ ", "(", "\\(", ")", "\\)", "[", "\\[", "]", "\\]", "$", "\\$", "&", "\\&", "*", "\\*", ">", "\\>", "<", "\\<", "|", "\\|", } var charEscapeMapInvert = invert(charEscapeMap) var escapeReplaer = strings.NewReplacer(charEscapeMap...) var escapeInvertReplaer = strings.NewReplacer(charEscapeMapInvert...) func invert(m []string) []string { newM := make([]string, len(charEscapeMap)) for i := range m { if (i + 1) % 2 == 0 { newM[i] = m[i - 1] newM[i - 1] = m[i] } } return newM } func splitForFile(str string) []string { split := []string{} sb := &strings.Builder{} quoted := false for i, r := range str { if r == '"' { quoted = !quoted sb.WriteRune(r) } else if r == ' ' && str[i - 1] == '\\' { sb.WriteRune(r) } else if !quoted && r == ' ' { split = append(split, sb.String()) sb.Reset() } else { sb.WriteRune(r) } } if strings.HasSuffix(str, " ") { split = append(split, "") } if sb.Len() > 0 { split = append(split, sb.String()) } return split } func fileComplete(query, ctx string, fields []string) ([]string, string) { q := splitForFile(ctx) return matchPath(q[len(q) - 1]) } func binaryComplete(query, ctx string, fields []string) ([]string, string) { q := splitForFile(ctx) query = q[len(q) - 1] var completions []string prefixes := []string{"./", "../", "/", "~/"} for _, prefix := range prefixes { if strings.HasPrefix(query, prefix) { fileCompletions, filePref := matchPath(query) if len(fileCompletions) != 0 { for _, f := range fileCompletions { fullPath, _ := filepath.Abs(util.ExpandHome(query + strings.TrimPrefix(f, filePref))) if err := findExecutable(escapeInvertReplaer.Replace(fullPath), false, true); err != nil { continue } completions = append(completions, f) } } return completions, filePref } } // filter out executables, but in path for _, dir := range filepath.SplitList(os.Getenv("PATH")) { // search for an executable which matches our query string if matches, err := filepath.Glob(filepath.Join(dir, query + "*")); err == nil { // get basename from matches for _, match := range matches { // check if we have execute permissions for our match err := findExecutable(match, true, false) if err != nil { continue } // get basename from match name := filepath.Base(match) // add basename to completions completions = append(completions, name) } } } // add lua registered commands to completions for cmdName := range commands { if strings.HasPrefix(cmdName, query) { completions = append(completions, cmdName) } } completions = removeDupes(completions) return completions, query } func matchPath(query string) ([]string, string) { oldQuery := query query = strings.TrimPrefix(query, "\"") var entries []string var baseName string query = escapeInvertReplaer.Replace(query) path, _ := filepath.Abs(util.ExpandHome(filepath.Dir(query))) if string(query) == "" { // filepath base below would give us "." // which would cause a match of only dotfiles path, _ = filepath.Abs(".") } else if !strings.HasSuffix(query, string(os.PathSeparator)) { baseName = filepath.Base(query) } files, _ := os.ReadDir(path) for _, file := range files { if strings.HasPrefix(file.Name(), baseName) { entry := file.Name() if file.IsDir() { entry = entry + string(os.PathSeparator) } if !strings.HasPrefix(oldQuery, "\"") { entry = escapeFilename(entry) } entries = append(entries, entry) } } if !strings.HasPrefix(oldQuery, "\"") { baseName = escapeFilename(baseName) } return entries, baseName } func escapeFilename(fname string) string { return escapeReplaer.Replace(fname) } // #interface completions // tab completions // The completions interface deals with tab completions. func completionLoader(rtm *rt.Runtime) *rt.Table { exports := map[string]util.LuaExport{ "files": {luaFileComplete, 3, false}, "bins": {luaBinaryComplete, 3, false}, "call": {callLuaCompleter, 4, false}, "handler": {completionHandler, 2, false}, } mod := rt.NewTable() util.SetExports(rtm, mod, exports) return mod } // left as a shim, might doc in the same way as hilbish functions func completionHandler(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { return c.Next(), nil } func callLuaCompleter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.CheckNArgs(4); err != nil { return nil, err } completer, err := c.StringArg(0) if err != nil { return nil, err } query, err := c.StringArg(1) if err != nil { return nil, err } ctx, err := c.StringArg(2) if err != nil { return nil, err } fields, err := c.TableArg(3) if err != nil { return nil, err } var completecb *rt.Closure var ok bool if completecb, ok = luaCompletions[completer]; !ok { return nil, errors.New("completer " + completer + " does not exist") } // we must keep the holy 80 cols completerReturn, err := rt.Call1(l.MainThread(), rt.FunctionValue(completecb), rt.StringValue(query), rt.StringValue(ctx), rt.TableValue(fields)) if err != nil { return nil, err } return c.PushingNext1(t.Runtime, completerReturn), nil } func luaFileComplete(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { query, ctx, fds, err := getCompleteParams(t, c) if err != nil { return nil, err } completions, pfx := fileComplete(query, ctx, fds) luaComps := rt.NewTable() for i, comp := range completions { luaComps.Set(rt.IntValue(int64(i + 1)), rt.StringValue(comp)) } return c.PushingNext(t.Runtime, rt.TableValue(luaComps), rt.StringValue(pfx)), nil } func luaBinaryComplete(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { query, ctx, fds, err := getCompleteParams(t, c) if err != nil { return nil, err } completions, pfx := binaryComplete(query, ctx, fds) luaComps := rt.NewTable() for i, comp := range completions { luaComps.Set(rt.IntValue(int64(i + 1)), rt.StringValue(comp)) } return c.PushingNext(t.Runtime, rt.TableValue(luaComps), rt.StringValue(pfx)), nil } func getCompleteParams(t *rt.Thread, c *rt.GoCont) (string, string, []string, error) { if err := c.CheckNArgs(3); err != nil { return "", "", []string{}, err } query, err := c.StringArg(0) if err != nil { return "", "", []string{}, err } ctx, err := c.StringArg(1) if err != nil { return "", "", []string{}, err } fields, err := c.TableArg(2) if err != nil { return "", "", []string{}, err } var fds []string util.ForEach(fields, func(k rt.Value, v rt.Value) { if v.Type() == rt.StringType { fds = append(fds, v.AsString()) } }) return query, ctx, fds, err }