mirror of
https://github.com/kopia/kopia.git
synced 2026-03-18 14:16:24 -04:00
d2288c443f
cli: major refactoring of how CLI commands are registered The goal is to eliminate flags as global variables to allow for better testing. Each command and subcommand and most sets of flags are now their own struct with 'setup()' methods that attached the flags or subcommand to the provided parent. This change is 94.3% mechanical, but is fully organic and hand-made. * introduced cli.appServices interface which provides the environment in which commands run * remove auto-maintenance global flag * removed globals in memory_tracking.go * removed globals from cli_progress.go * removed globals from the update_check.go * moved configPath into TheApp * removed remaining globals from config.go * refactored logfile to get rid of global variables * removed 'app' global variable * linter fixes * fixed password_*.go build * fixed BSD build
89 lines
1.8 KiB
Go
89 lines
1.8 KiB
Go
package cli
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"os"
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"github.com/pkg/errors"
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"github.com/kopia/kopia/internal/iocopy"
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"github.com/kopia/kopia/repo"
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"github.com/kopia/kopia/repo/blob"
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)
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type commandBlobShow struct {
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blobShowDecrypt bool
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blobShowIDs []string
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}
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func (c *commandBlobShow) setup(svc appServices, parent commandParent) {
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cmd := parent.Command("show", "Show contents of BLOBs").Alias("cat")
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cmd.Flag("decrypt", "Decrypt blob if possible").BoolVar(&c.blobShowDecrypt)
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cmd.Arg("blobID", "Blob IDs").Required().StringsVar(&c.blobShowIDs)
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cmd.Action(svc.directRepositoryReadAction(c.run))
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}
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func (c *commandBlobShow) run(ctx context.Context, rep repo.DirectRepository) error {
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for _, blobID := range c.blobShowIDs {
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if err := c.maybeDecryptBlob(ctx, os.Stdout, rep, blob.ID(blobID)); err != nil {
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return errors.Wrap(err, "error presenting blob")
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}
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}
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return nil
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}
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func (c *commandBlobShow) maybeDecryptBlob(ctx context.Context, w io.Writer, rep repo.DirectRepository, blobID blob.ID) error {
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var (
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d []byte
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err error
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)
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if c.blobShowDecrypt && canDecryptBlob(blobID) {
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d, err = rep.IndexBlobReader().DecryptBlob(ctx, blobID)
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if isJSONBlob(blobID) && err == nil {
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var b bytes.Buffer
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if err = json.Indent(&b, d, "", " "); err != nil {
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return errors.Wrap(err, "invalid JSON")
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}
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d = b.Bytes()
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}
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} else {
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d, err = rep.BlobReader().GetBlob(ctx, blobID, 0, -1)
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}
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if err != nil {
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return errors.Wrapf(err, "error getting %v", blobID)
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}
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if _, err := iocopy.Copy(w, bytes.NewReader(d)); err != nil {
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return errors.Wrap(err, "error copying data")
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}
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return nil
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}
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func canDecryptBlob(b blob.ID) bool {
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switch b[0] {
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case 'n', 'm', 'l':
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return true
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default:
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return false
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}
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}
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func isJSONBlob(b blob.ID) bool {
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switch b[0] {
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case 'm', 'l':
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return true
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default:
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return false
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}
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}
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