mirror of https://github.com/databricks/cli.git
135 lines
3.2 KiB
Go
135 lines
3.2 KiB
Go
package sync
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import (
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"context"
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"errors"
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"io/fs"
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"os"
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"path/filepath"
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"github.com/databricks/cli/libs/filer"
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"github.com/databricks/cli/libs/log"
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"golang.org/x/sync/errgroup"
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)
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// Maximum number of concurrent requests during sync.
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const MaxRequestsInFlight = 20
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// Delete the specified path.
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func (s *Sync) applyDelete(ctx context.Context, remoteName string) error {
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s.notifyProgress(ctx, EventActionDelete, remoteName, 0.0)
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err := s.filer.Delete(ctx, remoteName)
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if err != nil && !errors.Is(err, fs.ErrNotExist) {
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return err
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}
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s.notifyProgress(ctx, EventActionDelete, remoteName, 1.0)
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return nil
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}
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// Remove the directory at the specified path.
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func (s *Sync) applyRmdir(ctx context.Context, remoteName string) error {
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s.notifyProgress(ctx, EventActionDelete, remoteName, 0.0)
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err := s.filer.Delete(ctx, remoteName)
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if err != nil {
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// Directory deletion is opportunistic, so we ignore errors.
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log.Debugf(ctx, "error removing directory %s: %s", remoteName, err)
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}
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s.notifyProgress(ctx, EventActionDelete, remoteName, 1.0)
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return nil
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}
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// Create a directory at the specified path.
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func (s *Sync) applyMkdir(ctx context.Context, localName string) error {
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s.notifyProgress(ctx, EventActionPut, localName, 0.0)
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err := s.filer.Mkdir(ctx, localName)
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if err != nil {
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return err
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}
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s.notifyProgress(ctx, EventActionPut, localName, 1.0)
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return nil
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}
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// Perform a PUT of the specified local path.
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func (s *Sync) applyPut(ctx context.Context, localName string) error {
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s.notifyProgress(ctx, EventActionPut, localName, 0.0)
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localFile, err := os.Open(filepath.Join(s.LocalPath, localName))
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if err != nil {
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return err
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}
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defer localFile.Close()
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opts := []filer.WriteMode{filer.CreateParentDirectories, filer.OverwriteIfExists}
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err = s.filer.Write(ctx, localName, localFile, opts...)
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if err != nil {
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return err
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}
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s.notifyProgress(ctx, EventActionPut, localName, 1.0)
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return nil
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}
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func groupRunSingle(ctx context.Context, group *errgroup.Group, fn func(context.Context, string) error, path string) {
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// Return early if the context has already been cancelled.
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select {
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case <-ctx.Done():
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return
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default:
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// Proceed.
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}
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group.Go(func() error {
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return fn(ctx, path)
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})
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}
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func groupRunParallel(ctx context.Context, paths []string, fn func(context.Context, string) error) error {
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group, ctx := errgroup.WithContext(ctx)
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group.SetLimit(MaxRequestsInFlight)
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for _, path := range paths {
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groupRunSingle(ctx, group, fn, path)
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}
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// Wait for goroutines to finish and return first non-nil error return if any.
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return group.Wait()
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}
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func (s *Sync) applyDiff(ctx context.Context, d diff) error {
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var err error
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// Delete files in parallel.
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err = groupRunParallel(ctx, d.delete, s.applyDelete)
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if err != nil {
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return err
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}
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// Delete directories ordered by depth from leaf to root.
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for _, group := range d.groupedRmdir() {
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err = groupRunParallel(ctx, group, s.applyRmdir)
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if err != nil {
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return err
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}
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}
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// Create directories (leafs only because intermediates are created automatically).
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for _, group := range d.groupedMkdir() {
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err = groupRunParallel(ctx, group, s.applyMkdir)
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if err != nil {
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return err
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}
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}
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// Put files in parallel.
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err = groupRunParallel(ctx, d.put, s.applyPut)
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return err
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}
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