64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
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package subrequests
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import (
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"context"
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"encoding/json"
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"github.com/moby/buildkit/frontend/gateway/client"
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gwpb "github.com/moby/buildkit/frontend/gateway/pb"
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"github.com/moby/buildkit/solver/errdefs"
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"github.com/pkg/errors"
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)
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const RequestSubrequestsDescribe = "frontend.subrequests.describe"
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var SubrequestsDescribeDefinition = Request{
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Name: RequestSubrequestsDescribe,
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Version: "1.0.0",
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Type: TypeRPC,
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Description: "List available subrequest types",
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Metadata: []Named{
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{
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Name: "result.json",
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},
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},
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}
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func Describe(ctx context.Context, c client.Client) ([]Request, error) {
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gwcaps := c.BuildOpts().Caps
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if err := (&gwcaps).Supports(gwpb.CapFrontendCaps); err != nil {
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return nil, errdefs.NewUnsupportedSubrequestError(RequestSubrequestsDescribe)
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}
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res, err := c.Solve(ctx, client.SolveRequest{
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FrontendOpt: map[string]string{
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"requestid": RequestSubrequestsDescribe,
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"frontend.caps": "moby.buildkit.frontend.subrequests",
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},
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Frontend: "dockerfile.v0",
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})
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if err != nil {
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var reqErr *errdefs.UnsupportedSubrequestError
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if errors.As(err, &reqErr) {
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return nil, err
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}
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var capErr *errdefs.UnsupportedFrontendCapError
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if errors.As(err, &capErr) {
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return nil, errdefs.NewUnsupportedSubrequestError(RequestSubrequestsDescribe)
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}
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return nil, err
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}
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dt, ok := res.Metadata["result.json"]
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if !ok {
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return nil, errors.Errorf("no result.json metadata in response")
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}
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var reqs []Request
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if err := json.Unmarshal(dt, &reqs); err != nil {
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return nil, errors.Wrap(err, "failed to parse describe result")
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}
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return reqs, nil
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}
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