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mir/main.go

133 lines
2.9 KiB
Go

package main
import (
"context"
_ "embed"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"os/signal"
"golang.org/x/mod/modfile"
"golang.org/x/mod/module"
"golang.org/x/mod/zip"
"orel.li/modularium/internal/index"
"orel.li/modularium/internal/ref"
)
var log_error = log.New(os.Stderr, "", 0)
var log_info = log.New(os.Stdout, "", 0)
func bail(status int, t string, args ...interface{}) {
if status != 0 {
shutdown(fmt.Errorf(t, args...))
} else {
log_info.Printf(t, args...)
shutdown(nil)
}
}
//go:embed usage
var usage string
func sigCancel(ctx context.Context) context.Context {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
ctx, cancel := context.WithCancel(ctx)
onShutdown(func() error { cancel(); return nil })
go func() {
<-c
shutdown(nil)
}()
return ctx
}
func serve(args []string) {
path := "./modularium.sock"
indexPath := pathArg{path: "./modules-index.json"}
serveFlags := flag.NewFlagSet("serve", flag.ExitOnError)
serveFlags.StringVar(&path, "l", path, "path for a unix domain socket to listen on")
serveFlags.Var(&indexPath, "index", "an index config")
serveFlags.Parse(args)
idx, err := index.Load(indexPath.path)
if err != nil {
shutdown(err)
}
log_info.Printf("index: %v", idx)
h := handler{
path: ref.New(&path),
index: ref.New(&indexPath),
}
if err := h.run(); err != nil {
bail(1, err.Error())
}
}
func zipcmd(args []string) {
var (
version string
outputPath string
)
flags := flag.NewFlagSet("zip", flag.ExitOnError)
flags.StringVar(&version, "version", "", "package version")
flags.StringVar(&outputPath, "o", "a.zip", "output file path")
flags.Parse(args)
if version == "" {
bail(1, "target release version is required")
}
pkgdir := flags.Arg(0)
modfilePath := filepath.Join(pkgdir, "go.mod")
b, err := ioutil.ReadFile(modfilePath)
if err != nil {
bail(1, "unable to read modfile: %v", err)
}
log_info.Printf("checking modfile at path %q", modfilePath)
f, err := modfile.Parse(modfilePath, b, nil)
if err != nil {
bail(1, "unable to parse modfile: %v", err)
}
modpath := f.Module.Mod.Path
log_info.Print("parsed modfile")
log_info.Printf("module path in modfile: %s", modpath)
log_info.Printf("module major version in modfile: %s", f.Module.Mod.Version)
log_info.Printf("target release version: %s", version)
if err := module.Check(modpath, version); err != nil {
shutdown(err)
}
zf, err := os.OpenFile(outputPath, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0644)
if err != nil {
bail(1, "output file not opened: %v", err)
}
mv := module.Version{Path: modpath, Version: version}
if err := zip.CreateFromDir(zf, mv, pkgdir); err != nil {
bail(1, "zip not created: %v", err)
}
}
func main() {
sigCancel(context.Background())
root := flag.NewFlagSet("", flag.ExitOnError)
root.Parse(os.Args[1:])
switch root.Arg(0) {
case "serve":
serve(root.Args()[1:])
case "zip":
zipcmd(root.Args()[1:])
default:
bail(0, usage)
}
}