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12409c7279
Adds a `--stats-only` flag to the `diff` command to reduce output verbosity. When `kopia diff` is invoked with the `--stats-only` flag it only outputs the aggregate statistics of changes.
95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
package cli
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"github.com/pkg/errors"
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"github.com/kopia/kopia/fs"
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"github.com/kopia/kopia/internal/diff"
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"github.com/kopia/kopia/repo"
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"github.com/kopia/kopia/snapshot/snapshotfs"
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)
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type commandDiff struct {
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diffFirstObjectPath string
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diffSecondObjectPath string
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diffCompareFiles bool
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diffStatsOnly bool
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diffCommandCommand string
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out textOutput
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}
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func (c *commandDiff) setup(svc appServices, parent commandParent) {
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cmd := parent.Command("diff", "Displays differences between two repository objects (files or directories)").Alias("compare")
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cmd.Arg("object-path1", "First object/path").Required().StringVar(&c.diffFirstObjectPath)
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cmd.Arg("object-path2", "Second object/path").Required().StringVar(&c.diffSecondObjectPath)
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cmd.Flag("files", "Compare files by launching diff command for all pairs of (old,new)").Short('f').BoolVar(&c.diffCompareFiles)
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cmd.Flag("stats-only", "Displays only aggregate statistics of the changes between two repository objects").BoolVar(&c.diffStatsOnly)
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cmd.Flag("diff-command", "Displays differences between two repository objects (files or directories)").Default(defaultDiffCommand()).Envar(svc.EnvName("KOPIA_DIFF")).StringVar(&c.diffCommandCommand)
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cmd.Action(svc.repositoryReaderAction(c.run))
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c.out.setup(svc)
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}
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func (c *commandDiff) run(ctx context.Context, rep repo.Repository) error {
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ent1, err := snapshotfs.FilesystemEntryFromIDWithPath(ctx, rep, c.diffFirstObjectPath, false)
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if err != nil {
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return errors.Wrapf(err, "error getting filesystem entry for %v", c.diffFirstObjectPath)
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}
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ent2, err := snapshotfs.FilesystemEntryFromIDWithPath(ctx, rep, c.diffSecondObjectPath, false)
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if err != nil {
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return errors.Wrapf(err, "error getting filesystem entry for %v", c.diffSecondObjectPath)
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}
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_, isDir1 := ent1.(fs.Directory)
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_, isDir2 := ent2.(fs.Directory)
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if isDir1 != isDir2 {
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return errors.New("arguments to diff must both be directories or both non-directories")
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}
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d, err := diff.NewComparer(c.out.stdout(), c.diffStatsOnly)
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if err != nil {
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return errors.Wrap(err, "error creating comparer")
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}
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defer d.Close() //nolint:errcheck
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if c.diffCompareFiles {
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parts := strings.Split(c.diffCommandCommand, " ")
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d.DiffCommand = parts[0]
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d.DiffArguments = parts[1:]
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}
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if isDir1 {
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snapshotDiffStats, err := d.Compare(ctx, ent1, ent2)
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if err != nil {
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return errors.Wrap(err, "error comparing directories")
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}
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b, err := json.Marshal(snapshotDiffStats)
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if err != nil {
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return errors.Wrap(err, "error marshaling computed snapshot diff stats")
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}
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fmt.Fprintf(c.out.stdout(), "%s", b) //nolint:errcheck
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return nil
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}
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return errors.New("comparing files not implemented yet")
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}
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func defaultDiffCommand() string {
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if isWindows() {
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return "cmp"
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}
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return "diff -u"
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}
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