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package rosa
import (
"errors"
"io/fs"
"os"
"path/filepath"
"hakurei.app/internal/pkg"
)
// gentooOverlay are symlinks on top of a Gentoo LLVM stage3 tarball for
// compatibility with the Rosa OS stage0 distribution.
type gentooOverlay struct{ stage3 pkg.Artifact }
// Kind returns the hardcoded [pkg.Kind] value.
func (a gentooOverlay) Kind() pkg.Kind { return kindGentooOverlay }
// Params is a noop.
func (a gentooOverlay) Params(*pkg.IContext) {}
// IsExclusive returns false: Cure performs a trivial filesystem write.
func (gentooOverlay) IsExclusive() bool { return false }
// Inputs returns the underlying Gentoo stage3.
func (a gentooOverlay) Inputs() []pkg.Artifact {
return []pkg.Artifact{a.stage3}
}
func init() {
pkg.Register(kindGentooOverlay, func(r *pkg.IRReader) pkg.Artifact {
a := gentooOverlay{r.Next()}
if _, ok := r.Finalise(); ok {
panic(pkg.ErrUnexpectedChecksum)
}
return a
})
}
// String returns a hardcoded name.
func (a gentooOverlay) String() string { return "gentoo-overlay" }
// Revision returns a hardcoded value incremented on layout changes.
func (a gentooOverlay) Revision() uint64 { return 0 }
// Cure installs the overlay.
func (a gentooOverlay) Cure(f *pkg.FContext) (err error) {
pathname, _ := f.GetArtifact(a.stage3)
var stage3 *os.Root
if stage3, err = os.OpenRoot(pathname.String()); err != nil {
return err
}
defer func() {
closeErr := stage3.Close()
if err == nil {
err = closeErr
}
}()
fsys := stage3.FS()
system := f.GetWorkDir().Append("system")
bin := system.Append("bin")
if err = os.MkdirAll(bin.String(), 0700); err != nil {
return
}
linknames := []string{
"../../bin/sh",
}
var dents []os.DirEntry
const llvm = "usr/lib/llvm"
dents, err = fs.ReadDir(fsys, llvm)
if err != nil {
return
}
if len(dents) != 1 {
return errors.New("stage3 /" + llvm + " contains more than one entry")
}
llvmBin := filepath.Join(llvm, dents[0].Name(), "bin")
dents, err = fs.ReadDir(fsys, llvmBin)
if err != nil {
return
}
for _, dent := range dents {
linknames = append(linknames, filepath.Join(
"../..",
llvmBin,
dent.Name(),
))
}
for _, linkname := range linknames {
if err = os.Symlink(
linkname,
bin.Append(filepath.Base(linkname)).String(),
); err != nil {
return
}
}
return
}
|
