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Hypotenuse - a tool for extracting the base images out of a Dockerfile.
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Dan Lorenc
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Mar 28, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| FROM us-central1-docker.pkg.dev/dlorenc-vmtest2/test/golang:1.16.2 AS builder | ||
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| ADD go.mod go.sum $APP_ROOT/src/ | ||
| RUN go mod download | ||
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| # Add source code | ||
| ADD ./ $APP_ROOT/src/ | ||
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| RUN go build ./cmd/server | ||
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| # Multi-Stage production build | ||
| FROM us-central1-docker.pkg.dev/dlorenc-vmtest2/test/distroless as deploy | ||
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| # Retrieve the binary from the previous stage | ||
| COPY --from=builder /opt/app-root/src/server /usr/local/bin/server | ||
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| # Set the binary as the entrypoint of the container | ||
| CMD ["server", "serve"] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| package main | ||
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| import ( | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
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| "github.com/google/go-containerregistry/pkg/authn" | ||
| "github.com/google/go-containerregistry/pkg/name" | ||
| "github.com/google/go-containerregistry/pkg/v1/remote" | ||
| "github.com/uber/makisu/lib/parser/dockerfile" | ||
| ) | ||
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| func main() { | ||
| f := os.Args[1] | ||
| c, err := ioutil.ReadFile(f) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| stages, err := dockerfile.ParseFile(string(c), nil) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
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| stageNames := map[string]struct{}{} | ||
| for _, s := range stages { | ||
| if s.From.Alias != "" { | ||
| stageNames[s.From.Alias] = struct{}{} | ||
| } | ||
| if _, ok := stageNames[s.From.Image]; ok { | ||
| continue | ||
| } | ||
| ref, err := name.ParseReference(s.From.Image) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
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| img, err := remote.Image(ref, remote.WithAuthFromKeychain(authn.DefaultKeychain)) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| dgst, err := img.Digest() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| fmt.Println(ref.Context().Digest(dgst.String())) | ||
| } | ||
| } |
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