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package sourcepolicy
import (
"context"
"github.com/moby/buildkit/solver/pb"
spb "github.com/moby/buildkit/sourcepolicy/pb"
"github.com/moby/buildkit/util/bklog"
"github.com/pkg/errors"
)
// mutate is a MutateFn which converts the source operation to the identifier and attributes provided by the policy.
// If there is no change, then the return value should be false and is not considered an error.
func mutate(ctx context.Context, op *pb.SourceOp, rule *spb.Rule, selector *selectorCache, ref string) (bool, error) {
if rule.Updates == nil {
return false, errors.Errorf("missing destination for convert rule")
}
dest := rule.Updates.Identifier
if dest == "" {
dest = rule.Selector.Identifier
}
dest, err := selector.Format(ref, dest)
if err != nil {
return false, errors.Wrap(err, "error formatting destination")
}
bklog.G(ctx).Debugf("sourcepolicy: converting %s to %s, pattern: %s", ref, dest, rule.Updates.Identifier)
var mutated bool
if op.Identifier != dest && dest != "" {
mutated = true
op.Identifier = dest
}
if rule.Updates.Attrs != nil {
if op.Attrs == nil {
op.Attrs = make(map[string]string, len(rule.Updates.Attrs))
}
for k, v := range rule.Updates.Attrs {
if op.Attrs[k] != v {
bklog.G(ctx).Debugf("setting attr %s=%s", k, v)
op.Attrs[k] = v
mutated = true
}
}
}
return mutated, nil
}
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