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Signed-off-by: Hank Donnay <hdonnay@redhat.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| package main | ||
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|
||
| import ( | ||
| "io/ioutil" | ||
| "log" | ||
| ) | ||
|
|
||
| var debug = log.New(ioutil.Discard, "debug: ", log.LstdFlags|log.Lmsgprefix) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "log" | ||
| "os" | ||
|
|
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| "github.com/urfave/cli/v2" | ||
| ) | ||
|
|
||
| var ( | ||
| flagDebug bool | ||
| ) | ||
|
|
||
| func main() { | ||
| var exit int | ||
| defer func() { os.Exit(exit) }() | ||
| ctx, cancel := context.WithCancel(context.Background()) | ||
| defer cancel() | ||
|
|
||
| app := &cli.App{ | ||
| Name: "clairctl", | ||
| Version: "0.1.0", | ||
| Description: "A command-line tool for clair v4.", | ||
| EnableBashCompletion: true, | ||
| Before: func(c *cli.Context) error { | ||
| if c.IsSet("D") { | ||
| debug.SetOutput(os.Stderr) | ||
| } | ||
| return nil | ||
| }, | ||
| Commands: []*cli.Command{ | ||
| ManifestCmd, | ||
| }, | ||
| Flags: []cli.Flag{ | ||
| &cli.BoolFlag{ | ||
| Name: "D", | ||
| Usage: "print debugging logs", | ||
| }, | ||
| }, | ||
| } | ||
| log.SetFlags(log.Flags()) | ||
|
|
||
| if err := app.RunContext(ctx, os.Args); err != nil { | ||
| exit = 1 | ||
| if err, ok := err.(cli.ExitCoder); ok { | ||
| exit = err.ExitCode() | ||
| } | ||
| log.Println(err) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "path" | ||
| "strings" | ||
|
|
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| "github.com/google/go-containerregistry/pkg/authn" | ||
| "github.com/google/go-containerregistry/pkg/name" | ||
| "github.com/google/go-containerregistry/pkg/v1/remote" | ||
| "github.com/google/go-containerregistry/pkg/v1/remote/transport" | ||
| "github.com/quay/claircore" | ||
| "github.com/urfave/cli/v2" | ||
| "golang.org/x/sync/errgroup" | ||
| ) | ||
|
|
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| var ManifestCmd = &cli.Command{ | ||
| Name: "manifest", | ||
| Description: "print a clair manifest for the provided container", | ||
| Action: manifestAction, | ||
| } | ||
|
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| func manifestAction(c *cli.Context) error { | ||
| debug.Println("manifest") | ||
| args := c.Args() | ||
| if args.Len() == 0 { | ||
| return errors.New("missing needed arguments") | ||
| } | ||
|
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| result := make(chan *claircore.Manifest) | ||
| done := make(chan struct{}) | ||
| eg, ctx := errgroup.WithContext(c.Context) | ||
| go func() { | ||
| defer close(done) | ||
| buf := bufio.NewWriter(os.Stdout) | ||
| defer buf.Flush() | ||
| enc := json.NewEncoder(buf) | ||
| for m := range result { | ||
| enc.Encode(m) | ||
| buf.Flush() | ||
| } | ||
| }() | ||
|
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||
| for i := 0; i < args.Len(); i++ { | ||
| name := args.Get(i) | ||
| debug.Printf("%s: fetching", name) | ||
| eg.Go(func() error { | ||
| m, err := Inspect(ctx, name) | ||
| if err != nil { | ||
| debug.Printf("%s: err: %v", name) | ||
| return err | ||
| } | ||
| debug.Printf("%s: ok", name) | ||
| result <- m | ||
| return nil | ||
| }) | ||
| } | ||
| if err := eg.Wait(); err != nil { | ||
| return err | ||
| } | ||
| close(result) | ||
| <-done | ||
| return nil | ||
| } | ||
|
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| func Inspect(ctx context.Context, r string) (*claircore.Manifest, error) { | ||
| ref, err := name.ParseReference(r) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| repo := ref.Context() | ||
| auth, err := authn.DefaultKeychain.Resolve(repo) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| rt, err := transport.New(repo.Registry, auth, http.DefaultTransport, []string{repo.Scope("pull")}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| desc, err := remote.Get(ref, remote.WithTransport(rt)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| img, err := desc.Image() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| h, err := img.Digest() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ccd, err := claircore.ParseDigest(h.String()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| out := claircore.Manifest{ | ||
| Hash: ccd, | ||
| } | ||
| debug.Printf("%s: found manifest %v", r, ccd) | ||
|
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| ls, err := img.Layers() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| debug.Printf("%s: found %d layers", r, len(ls)) | ||
|
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| rURL := url.URL{ | ||
| Scheme: repo.Scheme(), | ||
| Host: repo.RegistryStr(), | ||
| } | ||
| c := http.Client{ | ||
| Transport: rt, | ||
| } | ||
|
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| for _, l := range ls { | ||
| d, err := l.Digest() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ccd, err := claircore.ParseDigest(d.String()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| u, err := rURL.Parse(path.Join("/", "v2", strings.TrimPrefix(repo.RepositoryStr(), repo.RegistryStr()), "blobs", d.String())) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodHead, u.String(), nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| res, err := c.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| res.Body.Close() | ||
|
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| res.Request.Header.Del("User-Agent") | ||
| out.Layers = append(out.Layers, &claircore.Layer{ | ||
| Hash: ccd, | ||
| URI: res.Request.URL.String(), | ||
| Headers: res.Request.Header, | ||
| }) | ||
| } | ||
|
|
||
| return &out, nil | ||
| } |
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