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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 (
flagQuiet bool
flagCures int
flagBase string
flagTShift int
)
c := command.New(os.Stderr, log.Printf, "mbf", func([]string) (err error) {
msg.SwapVerbose(!flagQuiet)
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 {
cache.SetThreshold(0)
} else if flagTShift > 31 {
cache.SetThreshold(1 << 31)
} else {
cache.SetThreshold(1 << flagTShift)
}
}
return
}).Flag(
&flagQuiet,
"q", command.BoolFlag(false),
"Do not print cure messages",
).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(-1),
"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",
)
}
{
var (
flagGentoo string
flagChecksum string
flagStage0 bool
)
c.NewCommand(
"stage3",
"Check for toolchain 3-stage non-determinism",
func(args []string) (err error) {
std := rosa.Std
if flagGentoo != "" {
std -= 3 // magic number to discourage misuse
var checksum pkg.Checksum
if len(flagChecksum) != 0 {
if err = pkg.Decode(&checksum, flagChecksum); err != nil {
return
}
}
rosa.SetGentooStage3(flagGentoo, checksum)
}
_, _, _, stage1 := (std - 2).NewLLVM()
_, _, _, stage2 := (std - 1).NewLLVM()
_, _, _, stage3 := std.NewLLVM()
var (
pathname *check.Absolute
checksum [2]unique.Handle[pkg.Checksum]
)
if pathname, _, err = cache.Cure(stage1); err != nil {
return err
}
log.Println("stage1:", pathname)
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(),
}
} else {
log.Println(
"stage2 is identical to stage3",
"("+pkg.Encode(checksum[0].Value())+")",
)
}
if flagStage0 {
if pathname, _, err = cache.Cure(
std.Load(rosa.Stage0),
); err != nil {
return err
}
log.Println(pathname)
}
return
},
).
Flag(
&flagGentoo,
"gentoo", command.StringFlag(""),
"Bootstrap from a Gentoo stage3 tarball",
).
Flag(
&flagChecksum,
"checksum", command.StringFlag(""),
"Checksum of Gentoo stage3 tarball",
).
Flag(
&flagStage0,
"stage0", command.BoolFlag(false),
"Create bootstrap stage0 tarball",
)
}
{
var (
flagDump string
)
c.NewCommand(
"cure",
"Cure the named artifact and show its path",
func(args []string) error {
if len(args) != 1 {
return errors.New("cure requires 1 argument")
}
if p, ok := rosa.ResolveName(args[0]); !ok {
return fmt.Errorf("unsupported artifact %q", args[0])
} else if flagDump == "" {
pathname, _, err := cache.Cure(rosa.Std.Load(p))
if err == nil {
log.Println(pathname)
}
return err
} else {
f, err := os.OpenFile(
flagDump,
os.O_WRONLY|os.O_CREATE|os.O_EXCL,
0644,
)
if err != nil {
return err
}
if err = cache.EncodeAll(f, rosa.Std.Load(p)); err != nil {
_ = f.Close()
return err
}
return f.Close()
}
},
).
Flag(
&flagDump,
"dump", command.StringFlag(""),
"Write IR to specified pathname and terminate",
)
}
c.MustParse(os.Args[1:], func(err error) {
if cache != nil {
cache.Close()
}
log.Fatal(err)
})
}
|
