databricks-cli/bundle/mutator.go

55 lines
1.3 KiB
Go

package bundle
import (
"context"
"github.com/databricks/cli/libs/log"
)
// Mutator is the interface type that mutates a bundle's configuration or internal state.
// This makes every mutation or action observable and debuggable.
type Mutator interface {
// Name returns the mutators name.
Name() string
// Apply mutates the specified bundle object.
// It may return a list of mutators to apply immediately after this mutator.
// For example: when processing all configuration files in the tree; each file gets
// its own mutator instance.
Apply(context.Context, *Bundle) ([]Mutator, error)
}
// applyMutator calls apply on the specified mutator given a bundle.
// Any mutators this call returns are applied recursively.
func applyMutator(ctx context.Context, b *Bundle, m Mutator) error {
ctx = log.NewContext(ctx, log.GetLogger(ctx).With("mutator", m.Name()))
log.Debugf(ctx, "Apply")
ms, err := m.Apply(ctx, b)
if err != nil {
log.Errorf(ctx, "Error: %s", err)
return err
}
// Apply recursively.
err = Apply(ctx, b, ms)
if err != nil {
return err
}
return nil
}
func Apply(ctx context.Context, b *Bundle, ms []Mutator) error {
if len(ms) == 0 {
return nil
}
for _, m := range ms {
err := applyMutator(ctx, b, m)
if err != nil {
return err
}
}
return nil
}