Hilbish/hilbish.go

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// 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"
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"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,
}
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
}
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L.SetField(mod, "ver", lua.LString(version))
L.SetField(mod, "user", lua.LString(username))
L.SetField(mod, "host", lua.LString(host))
L.SetField(mod, "home", lua.LString(homedir))
xdg := L.NewTable()
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L.SetField(xdg, "config", lua.LString(confDir))
L.SetField(xdg, "data", lua.LString(getenv("XDG_DATA_HOME", homedir + "/.local/share/")))
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.")
L.Push(mod)
return 1
}
// run(cmd)
// Runs `cmd` in Hilbish's sh interpreter
func hlrun(L *lua.LState) int {
var exitcode uint8 = 0
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
}
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// cwd()
// Returns the current directory of the shell
func hlcwd(L *lua.LState) int {
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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
}