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// Copyright 2023 Google LLC All Rights Reserved. | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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package cmd | ||
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import ( | ||
"errors" | ||
"fmt" | ||
"log" | ||
"net" | ||
"net/http" | ||
"os" | ||
"time" | ||
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"github.com/spf13/cobra" | ||
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"github.com/google/go-containerregistry/pkg/registry" | ||
) | ||
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func newCmdRegistry() *cobra.Command { | ||
cmd := &cobra.Command{ | ||
Use: "registry", | ||
} | ||
cmd.AddCommand(newCmdServe()) | ||
return cmd | ||
} | ||
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func newCmdServe() *cobra.Command { | ||
return &cobra.Command{ | ||
Use: "serve", | ||
Short: "Serve an in-memory registry implementation", | ||
Long: `This sub-command serves an in-memory registry implementation on port :8080 (or $PORT) | ||
The command blocks while the server accepts pushes and pulls. | ||
Contents are only stored in memory, and when the process exits, pushed data is lost.`, | ||
Args: cobra.NoArgs, | ||
RunE: func(cmd *cobra.Command, _ []string) error { | ||
ctx := cmd.Context() | ||
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port := os.Getenv("PORT") | ||
if port == "" { | ||
port = "0" | ||
} | ||
listener, err := net.Listen("tcp", "localhost:"+port) | ||
if err != nil { | ||
log.Fatalln(err) | ||
} | ||
porti := listener.Addr().(*net.TCPAddr).Port | ||
port = fmt.Sprintf("%d", porti) | ||
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s := &http.Server{ | ||
ReadHeaderTimeout: 5 * time.Second, // prevent slowloris, quiet linter | ||
Handler: registry.New(), | ||
} | ||
log.Printf("serving on port %s", port) | ||
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errCh := make(chan error) | ||
go func() { errCh <- s.Serve(listener) }() | ||
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<-ctx.Done() | ||
log.Println("shutting down...") | ||
if err := s.Shutdown(ctx); err != nil { | ||
return err | ||
} | ||
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if err := <-errCh; !errors.Is(err, http.ErrServerClosed) { | ||
return err | ||
} | ||
return nil | ||
}, | ||
} | ||
} |
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