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build: avoid compatability error when attestations disabled

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We should avoid erroring with attestations support compatability errors
when a user has specified --provenance=false.

A user may wish to enable --provenance=false that works across buildkit
versions, but currently it will fail on old versions - this patch fixes
this, to silently ignore the provenance flag for this check if it's set
to disabled.

Signed-off-by: Justin Chadwell <me@jedevc.com>
(cherry picked from commit 15a80b56b5d015baf40ff2393f424ff0bcc51d2b)
Signed-off-by: Justin Chadwell <me@jedevc.com>
This commit is contained in:
Justin Chadwell 2023-01-13 13:28:57 +00:00
parent b7781447d7
commit 033d5629c0
1 changed files with 14 additions and 10 deletions
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24
build/build.go
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@ -588,18 +588,22 @@ func toSolveOpt(ctx context.Context, node builder.Node, multiDriver bool, opt Op
}
}
if len(opt.Attests) > 0 {
if !bopts.LLBCaps.Contains(apicaps.CapID("exporter.image.attestations")) {
return nil, nil, errors.Errorf("attestations are not supported by the current buildkitd")
}
for k, v := range opt.Attests {
if v == nil {
continue
}
so.FrontendAttrs[k] = *v
attests := make(map[string]string)
for k, v := range opt.Attests {
if v != nil {
attests[k] = *v
}
}
if _, ok := opt.Attests["attest:provenance"]; !ok {
supportsAttestations := bopts.LLBCaps.Contains(apicaps.CapID("exporter.image.attestations"))
if len(attests) > 0 {
if !supportsAttestations {
return nil, nil, errors.Errorf("attestations are not supported by the current buildkitd")
}
for k, v := range attests {
so.FrontendAttrs[k] = v
}
}
if _, ok := opt.Attests["attest:provenance"]; !ok && supportsAttestations {
so.FrontendAttrs["attest:provenance"] = "mode=min,inline-only=true"
}