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Fix canonical image ref resolution (#3434)
Previously in release scripts we were using `docker inspect` which seems to sort .RepoDigests and it makes selection of the correct digest difficult because platform-specific digest can appear at a different index depending on the digests in the list. Signed-off-by: Mikalai Radchuk <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/containers/image/v5/docker" | ||
| "github.com/containers/image/v5/docker/reference" | ||
| "github.com/containers/image/v5/manifest" | ||
| "github.com/containers/image/v5/types" | ||
| ) | ||
|
|
||
| // This is a simple tool to resolve canonical reference of the image. | ||
| // E.g. this resolves quay.io/operator-framework/olm:v0.28.0 to | ||
| // quay.io/operator-framework/olm@sha256:40d0363f4aa684319cd721c2fcf3321785380fdc74de8ef821317cd25a10782a | ||
| func main() { | ||
| ctx := context.Background() | ||
|
|
||
| if len(os.Args) != 2 { | ||
| fmt.Fprintf(os.Stderr, "usage: %s <image reference>\n", os.Args[0]) | ||
| os.Exit(1) | ||
| } | ||
|
|
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| ref := os.Args[1] | ||
|
|
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| if err := run(ctx, ref); err != nil { | ||
| fmt.Fprintf(os.Stderr, "error running the tool: %s\n", err) | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
|
||
| func run(ctx context.Context, ref string) error { | ||
| imgRef, err := reference.ParseNamed(ref) | ||
| if err != nil { | ||
| return fmt.Errorf("error parsing image reference %q: %w", ref, err) | ||
| } | ||
|
|
||
| sysCtx := &types.SystemContext{} | ||
| canonicalRef, err := resolveCanonicalRef(ctx, imgRef, sysCtx) | ||
| if err != nil { | ||
| return fmt.Errorf("error resolving canonical reference: %w", err) | ||
| } | ||
|
|
||
| fmt.Println(canonicalRef.String()) | ||
| return nil | ||
| } | ||
|
|
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| func resolveCanonicalRef(ctx context.Context, imgRef reference.Named, sysCtx *types.SystemContext) (reference.Canonical, error) { | ||
| if canonicalRef, ok := imgRef.(reference.Canonical); ok { | ||
| return canonicalRef, nil | ||
| } | ||
|
|
||
| srcRef, err := docker.NewReference(imgRef) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error creating reference: %w", err) | ||
| } | ||
|
|
||
| imgSrc, err := srcRef.NewImageSource(ctx, sysCtx) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error creating image source: %w", err) | ||
| } | ||
| defer imgSrc.Close() | ||
|
|
||
| imgManifestData, _, err := imgSrc.GetManifest(ctx, nil) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error getting manifest: %w", err) | ||
| } | ||
| imgDigest, err := manifest.Digest(imgManifestData) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error getting digest of manifest: %w", err) | ||
| } | ||
| canonicalRef, err := reference.WithDigest(reference.TrimNamed(imgRef), imgDigest) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error creating canonical reference: %w", err) | ||
| } | ||
| return canonicalRef, nil | ||
| } |