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package main
import (
"context"
"errors"
"fmt"
"log"
"os"
"os/signal"
"path/filepath"
"runtime"
"syscall"
"unique"
"hakurei.app/command"
"hakurei.app/container"
"hakurei.app/container/check"
"hakurei.app/internal/pkg"
"hakurei.app/internal/rosa"
"hakurei.app/message"
)
func main() {
container.TryArgv0(nil)
log.SetFlags(0)
log.SetPrefix("mbf: ")
msg := message.New(log.Default())
if os.Geteuid() == 0 {
log.Fatal("this program must not run as root")
}
var cache *pkg.Cache
ctx, stop := signal.NotifyContext(context.Background(),
syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
defer stop()
defer func() {
if cache != nil {
cache.Close()
}
if r := recover(); r != nil {
fmt.Println(r)
log.Fatal("consider scrubbing the on-disk cache")
}
}()
var (
flagVerbose bool
flagCures int
flagBase string
flagTShift int
)
c := command.New(os.Stderr, log.Printf, "mbf", func([]string) (err error) {
msg.SwapVerbose(flagVerbose)
var base *check.Absolute
if flagBase, err = filepath.Abs(flagBase); err != nil {
return
} else if base, err = check.NewAbs(flagBase); err != nil {
return
}
if cache, err = pkg.Open(ctx, msg, flagCures, base); err == nil {
if flagTShift < 0 || flagTShift > 31 {
flagTShift = 31
}
cache.SetThreshold(1 << flagTShift)
}
return
}).Flag(
&flagVerbose,
"v", command.BoolFlag(false),
"Print cure messages to the console",
).Flag(
&flagCures,
"cures", command.IntFlag(0),
"Maximum number of dependencies to cure at any given time",
).Flag(
&flagBase,
"d", command.StringFlag("cache"),
"Directory to store cured artifacts",
).Flag(
&flagTShift,
"tshift", command.IntFlag(31),
"Dependency graph size exponent, to the power of 2",
)
{
var flagShifts int
c.NewCommand(
"scrub", "Examine the on-disk cache for errors",
func(args []string) error {
if len(args) > 0 {
return errors.New("scrub expects no arguments")
}
if flagShifts < 0 || flagShifts > 31 {
flagShifts = 12
}
return cache.Scrub(runtime.NumCPU() << flagShifts)
},
).Flag(
&flagShifts,
"shift", command.IntFlag(12),
"Scrub parallelism size exponent, to the power of 2",
)
}
c.NewCommand(
"stage3",
"Check for toolchain 3-stage non-determinism",
func(args []string) (err error) {
_, _, _, stage2 := (rosa.Std - 1).NewLLVM()
_, _, _, stage3 := rosa.Std.NewLLVM()
var (
pathname *check.Absolute
checksum [2]unique.Handle[pkg.Checksum]
)
if pathname, checksum[0], err = cache.Cure(stage2); err != nil {
return err
}
log.Println("stage2:", pathname)
if pathname, checksum[1], err = cache.Cure(stage3); err != nil {
return err
}
log.Println("stage3:", pathname)
if checksum[0] != checksum[1] {
err = &pkg.ChecksumMismatchError{
Got: checksum[0].Value(),
Want: checksum[1].Value(),
}
}
return
},
)
c.MustParse(os.Args[1:], func(err error) {
if cache != nil {
cache.Close()
}
log.Fatal(err)
})
}
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