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https://github.com/containers/skopeo.git
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4811c07d71
Mostly just name changes that should not change behavior, apart from ioutil.ReadDir -> os.ReadDir avoiding per-item lstat(2) in one case. Signed-off-by: Miloslav Trmač <mitr@redhat.com>
45 lines
970 B
Go
45 lines
970 B
Go
package main
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import (
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"errors"
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"fmt"
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"io"
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"os"
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"github.com/containers/image/v5/manifest"
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"github.com/spf13/cobra"
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)
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type manifestDigestOptions struct {
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}
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func manifestDigestCmd() *cobra.Command {
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var opts manifestDigestOptions
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cmd := &cobra.Command{
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Use: "manifest-digest MANIFEST-FILE",
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Short: "Compute a manifest digest of a file",
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RunE: commandAction(opts.run),
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Example: "skopeo manifest-digest manifest.json",
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}
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adjustUsage(cmd)
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return cmd
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}
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func (opts *manifestDigestOptions) run(args []string, stdout io.Writer) error {
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if len(args) != 1 {
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return errors.New("Usage: skopeo manifest-digest manifest")
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}
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manifestPath := args[0]
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man, err := os.ReadFile(manifestPath)
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if err != nil {
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return fmt.Errorf("Error reading manifest from %s: %v", manifestPath, err)
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}
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digest, err := manifest.Digest(man)
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if err != nil {
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return fmt.Errorf("Error computing digest: %v", err)
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}
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fmt.Fprintf(stdout, "%s\n", digest)
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return nil
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}
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