mirror of https://github.com/Hilbis/Hilbish
117 lines
2.6 KiB
Go
117 lines
2.6 KiB
Go
// Here is the core api for the hilbi shell itself
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// Basically, stuff about the shell itself and other functions
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// go here.
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package main
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import (
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"os"
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"runtime"
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"strings"
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"hilbish/util"
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"github.com/pborman/getopt"
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"github.com/yuin/gopher-lua"
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"mvdan.cc/sh/v3/interp"
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)
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var exports = map[string]lua.LGFunction {
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"run": hlrun,
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"flag": hlflag,
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"cwd": hlcwd,
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"read": hlread,
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}
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func HilbishLoader(L *lua.LState) int {
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mod := L.SetFuncs(L.NewTable(), exports)
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host, _ := os.Hostname()
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username := curuser.Username
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// this will be baked into binary since GOOS is a constant
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if runtime.GOOS == "windows" {
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username = strings.Split(username, "\\")[1] // for some reason Username includes the hostname on windows
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}
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L.SetField(mod, "ver", lua.LString(version))
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L.SetField(mod, "user", lua.LString(username))
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L.SetField(mod, "host", lua.LString(host))
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L.SetField(mod, "home", lua.LString(homedir))
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L.SetField(mod, "dataDir", lua.LString(dataDir))
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L.SetField(mod, "interactive", lua.LBool(interactive))
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L.SetField(mod, "login", lua.LBool(interactive))
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xdg := L.NewTable()
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L.SetField(xdg, "config", lua.LString(confDir))
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L.SetField(xdg, "data", lua.LString(getenv("XDG_DATA_HOME", homedir + "/.local/share")))
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L.SetField(mod, "xdg", xdg)
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util.Document(L, mod, "A miscellaneous sort of \"core\" API for things that relate to the shell itself and others.")
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L.Push(mod)
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return 1
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}
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// run(cmd)
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// Runs `cmd` in Hilbish's sh interpreter
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func hlrun(L *lua.LState) int {
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var exitcode uint8 = 0
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cmd := L.CheckString(1)
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err := execCommand(cmd)
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if code, ok := interp.IsExitStatus(err); ok {
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exitcode = code
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} else if err != nil {
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exitcode = 1
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}
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L.Push(lua.LNumber(exitcode))
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return 1
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}
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// flag(f)
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// Checks if the `f` flag has been passed to Hilbish.
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func hlflag(L *lua.LState) int {
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flagchar := L.CheckString(1)
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L.Push(lua.LBool(getopt.Lookup([]rune(flagchar)[0]).Seen()))
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return 1
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}
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// cwd()
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// Returns the current directory of the shell
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func hlcwd(L *lua.LState) int {
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cwd, _ := os.Getwd()
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L.Push(lua.LString(cwd))
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return 1
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}
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func getenv(key, fallback string) string {
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value := os.Getenv(key)
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if len(value) == 0 {
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return fallback
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}
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return value
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}
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// read(prompt) -> input?
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// Read input from the user, using Hilbish's line editor/input reader.
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// This is a separate instance from the one Hilbish actually uses.
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// Returns `input`, will be nil if ctrl + d is pressed, or an error occurs (which shouldn't happen)
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func hlread(L *lua.LState) int {
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luaprompt := L.CheckString(1)
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lualr := NewLineReader(luaprompt)
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input, err := lualr.Read()
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if err != nil {
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L.Push(lua.LNil)
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return 1
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}
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L.Push(lua.LString(input))
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return 1
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}
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