66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"github.com/containers/buildah"
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"github.com/containers/buildah/define"
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"github.com/containers/buildah/imagebuildah"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"go.podman.io/storage"
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"go.podman.io/storage/pkg/unshare"
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)
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func main() {
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if buildah.InitReexec() {
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return
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}
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unshare.MaybeReexecUsingUserNamespace(false)
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buildStoreOptions, err := storage.DefaultStoreOptions()
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if err != nil {
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panic(err)
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}
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buildStore, err := storage.GetStore(buildStoreOptions)
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if err != nil {
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panic(err)
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}
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defer func() {
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if _, err := buildStore.Shutdown(false); err != nil {
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if !errors.Is(err, storage.ErrLayerUsedByContainer) {
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fmt.Printf("failed to shutdown storage: %q", err)
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}
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}
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}()
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d, err := os.MkdirTemp("", "")
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if err != nil {
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panic(err)
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}
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defer os.RemoveAll(d)
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dockerfile := filepath.Join(d, "Dockerfile")
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f, err := os.Create(dockerfile)
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if err != nil {
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panic(err)
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}
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fmt.Fprintf(f, "FROM quay.io/libpod/alpine\nRUN echo CUT START; find /sys/fs/cgroup -print | sort ; echo CUT END")
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f.Close()
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buildOptions := define.BuildOptions{
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ContextDirectory: d,
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NamespaceOptions: []define.NamespaceOption{
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{Name: string(specs.NetworkNamespace), Host: true},
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},
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}
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_, _, err = imagebuildah.BuildDockerfiles(context.TODO(), buildStore, buildOptions, dockerfile)
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if err != nil {
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panic(err)
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}
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}
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