109 lines
3.3 KiB
Go
109 lines
3.3 KiB
Go
package main
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import (
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"flag"
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"os"
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"github.com/moby/buildkit/client/llb"
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"github.com/moby/buildkit/util/system"
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)
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type buildOpt struct {
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withContainerd bool
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containerd string
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runc string
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}
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func main() {
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var opt buildOpt
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flag.BoolVar(&opt.withContainerd, "with-containerd", true, "enable containerd worker")
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flag.StringVar(&opt.containerd, "containerd", "v1.2.9", "containerd version")
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flag.StringVar(&opt.runc, "runc", "v1.0.0-rc8", "runc version")
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flag.Parse()
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bk := buildkit(opt)
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out := bk.Run(llb.Shlex("ls -l /bin")) // debug output
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dt, err := out.Marshal(llb.LinuxAmd64)
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if err != nil {
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panic(err)
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}
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llb.WriteTo(dt, os.Stdout)
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}
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func goBuildBase() llb.State {
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goAlpine := llb.Image("docker.io/library/golang:1.12-alpine")
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return goAlpine.
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AddEnv("PATH", "/usr/local/go/bin:"+system.DefaultPathEnv).
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AddEnv("GOPATH", "/go").
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Run(llb.Shlex("apk add --no-cache g++ linux-headers")).
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Run(llb.Shlex("apk add --no-cache git libseccomp-dev make")).Root()
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}
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func runc(version string) llb.State {
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return goBuildBase().
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With(goFromGit("github.com/opencontainers/runc", version)).
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Run(llb.Shlex("go build -o /usr/bin/runc ./")).
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Root()
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}
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func containerd(version string) llb.State {
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return goBuildBase().
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Run(llb.Shlex("apk add --no-cache btrfs-progs-dev")).
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With(goFromGit("github.com/containerd/containerd", version)).
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Run(llb.Shlex("make bin/containerd")).Root()
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}
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func buildkit(opt buildOpt) llb.State {
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src := goBuildBase().With(goFromGit("github.com/moby/buildkit", "master"))
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buildkitdOCIWorkerOnly := src.
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Run(llb.Shlex("go build -o /bin/buildkitd.oci_only -tags no_containerd_worker ./cmd/buildkitd")).Root()
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buildkitd := src.
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Run(llb.Shlex("go build -o /bin/buildkitd ./cmd/buildkitd")).Root()
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buildctl := src.
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Run(llb.Shlex("go build -o /bin/buildctl ./cmd/buildctl")).Root()
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r := llb.Image("docker.io/library/alpine:latest").With(
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copyFrom(buildctl, "/bin/buildctl", "/bin/"),
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copyFrom(runc(opt.runc), "/usr/bin/runc", "/bin/"),
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)
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if opt.withContainerd {
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return r.With(
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copyFrom(containerd(opt.containerd), "/go/src/github.com/containerd/containerd/bin/containerd", "/bin/"),
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copyFrom(buildkitd, "/bin/buildkitd", "/bin/"))
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}
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return r.With(copyFrom(buildkitdOCIWorkerOnly, "/bin/buildkitd.oci_only", "/bin/"))
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}
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// goFromGit is a helper for cloning a git repo, checking out a tag and copying
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// source directory into
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func goFromGit(repo, tag string) llb.StateOption {
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src := llb.Image("docker.io/library/alpine:latest").
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Run(llb.Shlex("apk add --no-cache git")).
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Run(llb.Shlexf("git clone https://%[1]s.git /go/src/%[1]s", repo)).
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Dirf("/go/src/%s", repo).
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Run(llb.Shlexf("git checkout -q %s", tag)).Root()
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return func(s llb.State) llb.State {
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return s.With(copyFrom(src, "/go", "/")).Reset(s).Dir(src.GetDir())
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}
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}
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// copyFrom has similar semantics as `COPY --from`
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func copyFrom(src llb.State, srcPath, destPath string) llb.StateOption {
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return func(s llb.State) llb.State {
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return copy(src, srcPath, s, destPath)
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}
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}
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// copy copies files between 2 states using cp until there is no copyOp
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func copy(src llb.State, srcPath string, dest llb.State, destPath string) llb.State {
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cpImage := llb.Image("docker.io/library/alpine:latest")
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cp := cpImage.Run(llb.Shlexf("cp -a /src%s /dest%s", srcPath, destPath))
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cp.AddMount("/src", src)
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return cp.AddMount("/dest", dest)
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}
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