// Here is the core api for the hilbi shell itself // Basically, stuff about the shell itself and other functions // go here. package main import ( "bytes" "errors" "fmt" "os" "os/exec" "runtime" "strings" "syscall" "time" "hilbish/util" rt "github.com/arnodel/golua/runtime" "github.com/arnodel/golua/lib/packagelib" "github.com/maxlandon/readline" "github.com/blackfireio/osinfo" "mvdan.cc/sh/v3/interp" ) var exports = map[string]util.LuaExport{ "alias": {hlalias, 2, false}, "appendPath": {hlappendPath, 1, false}, "complete": {hlcomplete, 2, false}, "cwd": {hlcwd, 0, false}, "exec": {hlexec, 1, false}, "runnerMode": {hlrunnerMode, 1, false}, "goro": {hlgoro, 1, true}, "highlighter": {hlhighlighter, 1, false}, "hinter": {hlhinter, 1, false}, "multiprompt": {hlmultiprompt, 1, false}, "prependPath": {hlprependPath, 1, false}, "prompt": {hlprompt, 1, true}, "inputMode": {hlinputMode, 1, false}, "interval": {hlinterval, 2, false}, "read": {hlread, 1, false}, "run": {hlrun, 1, true}, "timeout": {hltimeout, 2, false}, "which": {hlwhich, 1, false}, } var greeting string var hshMod *rt.Table var hilbishLoader = packagelib.Loader{ Load: hilbishLoad, Name: "hilbish", } func hilbishLoad(rtm *rt.Runtime) (rt.Value, func()) { fakeMod := rt.NewTable() modmt := rt.NewTable() mod := rt.NewTable() modIndex := func(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { arg := c.Arg(1) val := mod.Get(arg) return c.PushingNext1(t.Runtime, val), nil } modNewIndex := func(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { k, err := c.StringArg(1) if err != nil { return nil, err } v := c.Arg(2) if k == "highlighter" { var err error // fine to assign, since itll be either nil or a closure highlighter, err = c.ClosureArg(2) if err != nil { return nil, errors.New("hilbish.highlighter has to be a function") } } else if k == "hinter" { var err error hinter, err = c.ClosureArg(2) if err != nil { return nil, errors.New("hilbish.hinter has to be a function") } } else if modVal := mod.Get(rt.StringValue(k)); modVal != rt.NilValue { return nil, errors.New("not allowed to override in hilbish table") } mod.Set(rt.StringValue(k), v) return c.Next(), nil } modmt.Set(rt.StringValue("__newindex"), rt.FunctionValue(rt.NewGoFunction(modNewIndex, "__newindex", 3, false))) modmt.Set(rt.StringValue("__index"), rt.FunctionValue(rt.NewGoFunction(modIndex, "__index", 2, false))) fakeMod.SetMetatable(modmt) util.SetExports(rtm, mod, exports) hshMod = mod host, _ := os.Hostname() username := curuser.Username if runtime.GOOS == "windows" { username = strings.Split(username, "\\")[1] // for some reason Username includes the hostname on windows } greeting = `Welcome to {magenta}Hilbish{reset}, {cyan}` + username + `{reset}. The nice lil shell for {blue}Lua{reset} fanatics! Check out the {blue}{bold}guide{reset} command to get started. ` util.SetFieldProtected(fakeMod, mod, "ver", rt.StringValue(version), "Hilbish version") util.SetFieldProtected(fakeMod, mod, "user", rt.StringValue(username), "Username of user") util.SetFieldProtected(fakeMod, mod, "host", rt.StringValue(host), "Host name of the machine") util.SetFieldProtected(fakeMod, mod, "home", rt.StringValue(curuser.HomeDir), "Home directory of the user") util.SetFieldProtected(fakeMod, mod, "dataDir", rt.StringValue(dataDir), "Directory for Hilbish's data files") util.SetFieldProtected(fakeMod, mod, "interactive", rt.BoolValue(interactive), "If this is an interactive shell") util.SetFieldProtected(fakeMod, mod, "login", rt.BoolValue(login), "Whether this is a login shell") util.SetFieldProtected(fakeMod, mod, "greeting", rt.StringValue(greeting), "Hilbish's welcome message for interactive shells. It has Lunacolors formatting.") util.SetFieldProtected(fakeMod, mod, "vimMode", rt.NilValue, "Current Vim mode of Hilbish (nil if not in Vim mode)") util.SetFieldProtected(fakeMod, mod, "exitCode", rt.IntValue(0), "Exit code of last exected command") util.Document(fakeMod, "Hilbish's core API, containing submodules and functions which relate to the shell itself.") // hilbish.userDir table hshuser := rt.NewTable() util.SetField(rtm, hshuser, "config", rt.StringValue(confDir), "User's config directory") util.SetField(rtm, hshuser, "data", rt.StringValue(userDataDir), "XDG data directory") util.Document(hshuser, "User directories to store configs and/or modules.") mod.Set(rt.StringValue("userDir"), rt.TableValue(hshuser)) // hilbish.os table hshos := rt.NewTable() info, _ := osinfo.GetOSInfo() util.SetField(rtm, hshos, "family", rt.StringValue(info.Family), "Family name of the current OS") util.SetField(rtm, hshos, "name", rt.StringValue(info.Name), "Pretty name of the current OS") util.SetField(rtm, hshos, "version", rt.StringValue(info.Version), "Version of the current OS") util.Document(hshos, "OS info interface") mod.Set(rt.StringValue("os"), rt.TableValue(hshos)) // hilbish.aliases table aliases = newAliases() aliasesModule := aliases.Loader(rtm) util.Document(aliasesModule, "Alias inferface for Hilbish.") mod.Set(rt.StringValue("aliases"), rt.TableValue(aliasesModule)) // hilbish.history table historyModule := lr.Loader(rtm) mod.Set(rt.StringValue("history"), rt.TableValue(historyModule)) util.Document(historyModule, "History interface for Hilbish.") // hilbish.completion table hshcomp := rt.NewTable() util.SetField(rtm, hshcomp, "files", rt.FunctionValue(rt.NewGoFunction(luaFileComplete, "files", 3, false)), "Completer for files") util.SetField(rtm, hshcomp, "bins", rt.FunctionValue(rt.NewGoFunction(luaBinaryComplete, "bins", 3, false)), "Completer for executables/binaries") util.SetField(rtm, hshcomp, "call", rt.FunctionValue(rt.NewGoFunction(callLuaCompleter, "call", 4, false)), "Calls a completer and get its entries for completions") util.Document(hshcomp, "Completions interface for Hilbish.") mod.Set(rt.StringValue("completion"), rt.TableValue(hshcomp)) // hilbish.runner table runnerModule := runnerModeLoader(rtm) util.Document(runnerModule, "Runner/exec interface for Hilbish.") mod.Set(rt.StringValue("runner"), rt.TableValue(runnerModule)) // hilbish.jobs table jobs = newJobHandler() jobModule := jobs.loader(rtm) util.Document(jobModule, "(Background) job interface.") mod.Set(rt.StringValue("jobs"), rt.TableValue(jobModule)) timers = newTimerHandler() timerModule := timers.loader(rtm) util.Document(timerModule, "Timer interface, for control of all intervals and timeouts.") mod.Set(rt.StringValue("timers"), rt.TableValue(timerModule)) return rt.TableValue(fakeMod), nil } func getenv(key, fallback string) string { value := os.Getenv(key) if len(value) == 0 { return fallback } return value } func setVimMode(mode string) { util.SetField(l, hshMod, "vimMode", rt.StringValue(mode), "Current Vim mode of Hilbish (nil if not in Vim mode)") hooks.Em.Emit("hilbish.vimMode", mode) } func unsetVimMode() { util.SetField(l, hshMod, "vimMode", rt.NilValue, "Current Vim mode of Hilbish (nil if not in Vim mode)") } // run(cmd, returnOut) -> exitCode, stdout, stderr // Runs `cmd` in Hilbish's sh interpreter. // If returnOut is true, the outputs of `cmd` will be returned as the 2nd and // 3rd values instead of being outputted to the terminal. // --- @param cmd string func hlrun(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } cmd, err := c.StringArg(0) if err != nil { return nil, err } var terminalOut bool if len(c.Etc()) != 0 { tout := c.Etc()[0] termOut, ok := tout.TryBool() terminalOut = termOut if !ok { return nil, errors.New("bad argument to run (expected boolean, got " + tout.TypeName() + ")") } } else { terminalOut = true } var exitcode uint8 stdout, stderr, err := execCommand(cmd, terminalOut) if code, ok := interp.IsExitStatus(err); ok { exitcode = code } else if err != nil { exitcode = 1 } stdoutStr := "" stderrStr := "" if !terminalOut { stdoutStr = stdout.(*bytes.Buffer).String() stderrStr = stderr.(*bytes.Buffer).String() } return c.PushingNext(t.Runtime, rt.IntValue(int64(exitcode)), rt.StringValue(stdoutStr), rt.StringValue(stderrStr)), nil } // cwd() // Returns the current directory of the shell func hlcwd(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { cwd, _ := os.Getwd() return c.PushingNext1(t.Runtime, rt.StringValue(cwd)), nil } // read(prompt) -> input? // Read input from the user, using Hilbish's line editor/input reader. // This is a separate instance from the one Hilbish actually uses. // Returns `input`, will be nil if ctrl + d is pressed, or an error occurs (which shouldn't happen) // --- @param prompt string func hlread(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } luaprompt, err := c.StringArg(0) if err != nil { return nil, err } lualr := newLineReader("", true) lualr.SetPrompt(luaprompt) input, err := lualr.Read() if err != nil { return c.Next(), nil } return c.PushingNext1(t.Runtime, rt.StringValue(input)), nil } /* prompt(str, typ?) Changes the shell prompt to `str` There are a few verbs that can be used in the prompt text. These will be formatted and replaced with the appropriate values. `%d` - Current working directory `%u` - Name of current user `%h` - Hostname of device --- @param str string --- @param typ string Type of prompt, being left or right. Left by default. */ func hlprompt(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { err := c.Check1Arg() if err != nil { return nil, err } p, err := c.StringArg(0) if err != nil { return nil, err } typ := "left" // optional 2nd arg if len(c.Etc()) != 0 { ltyp := c.Etc()[0] var ok bool typ, ok = ltyp.TryString() if !ok { return nil, errors.New("bad argument to run (expected string, got " + ltyp.TypeName() + ")") } } switch typ { case "left": prompt = p lr.SetPrompt(fmtPrompt(prompt)) case "right": lr.SetRightPrompt(fmtPrompt(p)) default: return nil, errors.New("expected prompt type to be right or left, got " + typ) } return c.Next(), nil } // multiprompt(str) // Changes the continued line prompt to `str` // --- @param str string func hlmultiprompt(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } prompt, err := c.StringArg(0) if err != nil { return nil, err } multilinePrompt = prompt return c.Next(), nil } // alias(cmd, orig) // Sets an alias of `cmd` to `orig` // --- @param cmd string // --- @param orig string func hlalias(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.CheckNArgs(2); err != nil { return nil, err } cmd, err := c.StringArg(0) if err != nil { return nil, err } orig, err := c.StringArg(1) if err != nil { return nil, err } aliases.Add(cmd, orig) return c.Next(), nil } // appendPath(dir) // Appends `dir` to $PATH // --- @param dir string|table func hlappendPath(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } arg := c.Arg(0) // check if dir is a table or a string if arg.Type() == rt.TableType { util.ForEach(arg.AsTable(), func(k rt.Value, v rt.Value) { if v.Type() == rt.StringType { appendPath(v.AsString()) } }) } else if arg.Type() == rt.StringType { appendPath(arg.AsString()) } else { return nil, errors.New("bad argument to appendPath (expected string or table, got " + arg.TypeName() + ")") } return c.Next(), nil } func appendPath(dir string) { dir = strings.Replace(dir, "~", curuser.HomeDir, 1) pathenv := os.Getenv("PATH") // if dir isnt already in $PATH, add it if !strings.Contains(pathenv, dir) { os.Setenv("PATH", pathenv + string(os.PathListSeparator) + dir) } } // exec(cmd) // Replaces running hilbish with `cmd` // --- @param cmd string func hlexec(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } cmd, err := c.StringArg(0) if err != nil { return nil, err } cmdArgs, _ := splitInput(cmd) if runtime.GOOS != "windows" { cmdPath, err := exec.LookPath(cmdArgs[0]) if err != nil { fmt.Println(err) // if we get here, cmdPath will be nothing // therefore nothing will run } // syscall.Exec requires an absolute path to a binary // path, args, string slice of environments syscall.Exec(cmdPath, cmdArgs, os.Environ()) } else { cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...) cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr cmd.Stdin = os.Stdin cmd.Run() os.Exit(0) } return c.Next(), nil } // goro(fn) // Puts `fn` in a goroutine // --- @param fn function func hlgoro(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } fn, err := c.ClosureArg(0) if err != nil { return nil, err } // call fn go func() { _, err := rt.Call1(l.MainThread(), rt.FunctionValue(fn), c.Etc()...) if err != nil { fmt.Fprintln(os.Stderr, "Error in goro function:\n\n", err) } }() return c.Next(), nil } // timeout(cb, time) // Runs the `cb` function after `time` in milliseconds // Returns a `timer` object (see `doc timers`). // --- @param cb function // --- @param time number // --- @return table func hltimeout(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.CheckNArgs(2); err != nil { return nil, err } cb, err := c.ClosureArg(0) if err != nil { return nil, err } ms, err := c.IntArg(1) if err != nil { return nil, err } interval := time.Duration(ms) * time.Millisecond timer := timers.create(timerTimeout, interval, cb) timer.start() return c.PushingNext1(t.Runtime, timer.lua()), nil } // interval(cb, time) // Runs the `cb` function every `time` milliseconds. // Returns a `timer` object (see `doc timers`). // --- @param cb function // --- @param time number // --- @return table func hlinterval(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.CheckNArgs(2); err != nil { return nil, err } cb, err := c.ClosureArg(0) if err != nil { return nil, err } ms, err := c.IntArg(1) if err != nil { return nil, err } interval := time.Duration(ms) * time.Millisecond timer := timers.create(timerInterval, interval, cb) timer.start() return c.PushingNext1(t.Runtime, timer.lua()), nil } // complete(scope, cb) // Registers a completion handler for `scope`. // A `scope` is currently only expected to be `command.`, // replacing with the name of the command (for example `command.git`). // `cb` must be a function that returns a table of "completion groups." // A completion group is a table with the keys `items` and `type`. // `items` being a table of items and `type` being the display type, which is // `grid` (the normal file completion display) or `list` (with a description) // --- @param scope string // --- @param cb function func hlcomplete(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { scope, cb, err := util.HandleStrCallback(t, c) if err != nil { return nil, err } luaCompletions[scope] = cb return c.Next(), nil } // prependPath(dir) // Prepends `dir` to $PATH // --- @param dir string func hlprependPath(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } dir, err := c.StringArg(0) if err != nil { return nil, err } dir = strings.Replace(dir, "~", curuser.HomeDir, 1) pathenv := os.Getenv("PATH") // if dir isnt already in $PATH, add in if !strings.Contains(pathenv, dir) { os.Setenv("PATH", dir + string(os.PathListSeparator) + pathenv) } return c.Next(), nil } // which(name) // Checks if `name` is a valid command // --- @param binName string func hlwhich(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } name, err := c.StringArg(0) if err != nil { return nil, err } cmd := aliases.Resolve(name) // check for commander if commands[cmd] != nil { // they dont resolve to a path, so just send the cmd return c.PushingNext1(t.Runtime, rt.StringValue(cmd)), nil } path, err := exec.LookPath(cmd) if err != nil { return c.Next(), nil } return c.PushingNext1(t.Runtime, rt.StringValue(path)), nil } // inputMode(mode) // Sets the input mode for Hilbish's line reader. Accepts either emacs or vim // --- @param mode string func hlinputMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } mode, err := c.StringArg(0) if err != nil { return nil, err } switch mode { case "emacs": unsetVimMode() lr.rl.InputMode = readline.Emacs case "vim": setVimMode("insert") lr.rl.InputMode = readline.Vim default: return nil, errors.New("inputMode: expected vim or emacs, received " + mode) } return c.Next(), nil } // runnerMode(mode) // Sets the execution/runner mode for interactive Hilbish. This determines whether // Hilbish wll try to run input as Lua and/or sh or only do one of either. // Accepted values for mode are hybrid (the default), hybridRev (sh first then Lua), // sh, and lua. It also accepts a function, to which if it is passed one // will call it to execute user input instead. // --- @param mode string|function func hlrunnerMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } mode := c.Arg(0) switch mode.Type() { case rt.StringType: switch mode.AsString() { case "hybrid", "hybridRev", "lua", "sh": runnerMode = mode default: return nil, errors.New("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received " + mode.AsString()) } case rt.FunctionType: runnerMode = mode default: return nil, errors.New("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received " + mode.TypeName()) } return c.Next(), nil } // hinter(line, pos) // The command line hint handler. It gets called on every key insert to // determine what text to use as an inline hint. It is passed the current // line and cursor position. It is expected to return a string which is used // as the text for the hint. This is by default a shim. To set hints, // override this function with your custom handler. // --- @param line string // --- @param pos int func hlhinter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { return c.Next(), nil } // highlighter(line) // Line highlighter handler. This is mainly for syntax highlighting, but in // reality could set the input of the prompt to *display* anything. The // callback is passed the current line and is expected to return a line that // will be used as the input display. // --- @param line string func hlhighlighter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { return c.Next(), nil }