Hilbish/hilbish.go

118 lines
3.0 KiB
Go

// Here is the core api for the hilbi shell itself
// Basically, stuff about the shell itself and other functions
// go here.
package main
import (
"os"
"runtime"
"strings"
"hilbish/util"
"github.com/pborman/getopt"
"github.com/yuin/gopher-lua"
"mvdan.cc/sh/v3/interp"
)
var exports = map[string]lua.LGFunction {
"run": hlrun,
"flag": hlflag,
"cwd": hlcwd,
"read": hlread,
}
func hilbishLoader(L *lua.LState) int {
mod := L.SetFuncs(L.NewTable(), exports)
host, _ := os.Hostname()
username := curuser.Username
// this will be baked into binary since GOOS is a constant
if runtime.GOOS == "windows" {
username = strings.Split(username, "\\")[1] // for some reason Username includes the hostname on windows
}
util.SetField(L, mod, "ver", lua.LString(version), "Hilbish version")
util.SetField(L, mod, "user", lua.LString(username), "Username of user")
util.SetField(L, mod, "host", lua.LString(host), "Host name of the machine")
util.SetField(L, mod, "home", lua.LString(curuser.HomeDir), "Home directory of the user")
util.SetField(L, mod, "dataDir", lua.LString(dataDir), "Directory for Hilbish's data files")
util.SetField(L, mod, "interactive", lua.LBool(interactive), "If this is an interactive shell")
util.SetField(L, mod, "login", lua.LBool(interactive), "Whether this is a login shell")
xdg := L.NewTable()
util.SetField(L, xdg, "config", lua.LString(confDir), "XDG config directory")
util.SetField(L, xdg, "data", lua.LString(getenv("XDG_DATA_HOME", curuser.HomeDir + "/.local/share")), "XDG data directory")
L.SetField(mod, "xdg", xdg)
util.Document(L, xdg, "Variables for the XDG base directory spec.")
util.Document(L, mod, "A miscellaneous sort of \"core\" API for things that relate to the shell itself and others.")
L.Push(mod)
return 1
}
// run(cmd)
// Runs `cmd` in Hilbish's sh interpreter
func hlrun(L *lua.LState) int {
var exitcode uint8
cmd := L.CheckString(1)
err := execCommand(cmd)
if code, ok := interp.IsExitStatus(err); ok {
exitcode = code
} else if err != nil {
exitcode = 1
}
L.Push(lua.LNumber(exitcode))
return 1
}
// flag(f)
// Checks if the `f` flag has been passed to Hilbish.
func hlflag(L *lua.LState) int {
flagchar := L.CheckString(1)
L.Push(lua.LBool(getopt.Lookup([]rune(flagchar)[0]).Seen()))
return 1
}
// cwd()
// Returns the current directory of the shell
func hlcwd(L *lua.LState) int {
cwd, _ := os.Getwd()
L.Push(lua.LString(cwd))
return 1
}
func getenv(key, fallback string) string {
value := os.Getenv(key)
if len(value) == 0 {
return fallback
}
return value
}
// 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)
func hlread(L *lua.LState) int {
luaprompt := L.CheckString(1)
lualr := newLineReader(luaprompt)
input, err := lualr.Read()
if err != nil {
L.Push(lua.LNil)
return 1
}
L.Push(lua.LString(input))
return 1
}