chore: release init command stub

Author: suztomo

internal/librariangen/languagecontainer/languagecontainer.go

@@ -0,0 +1,70 @@
+// Copyright 2025 Google LLC
+//
+// 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.
+
+// Package languagecontainer defines LanguageContainer interface and
+// the Run function to execute commands within the container.
+// This package should not have any language-specific implementation or
+// Librarian CLI's implementation.
+// TODO(b/447404382): Move this package to the https://github.com/googleapis/librarian
+// GitHub repository once the interface is finalized.
+package languagecontainer
+
+import (
+	"context"
+	"log/slog"
+
+	"cloud.google.com/java/internal/librariangen/languagecontainer/release"
+	"cloud.google.com/java/internal/librariangen/message"
+)
+
+// LanguageContainer defines the interface for language-specific container operations.
+type LanguageContainer interface {
+	ReleaseInit(context.Context, *release.Config) (*message.ReleaseInitResponse, error)
+	// Other container functions like Generate and Build will also be part of the interface.
+}
+
+// Run would accept an implementation of the LanguageContainer interface.
+func Run(args []string, container LanguageContainer) int {
+	// Logic to parse args and call the appropriate method on the container.
+	// For example, if args[1] is "generate":
+	//   request := ... // unmarshal the request from the expected location
+	//   err := container.Generate(context.Background(), request)
+	//   ...
+	if len(args) < 1 {
+		panic("args must not be empty")
+	}
+	switch args[0] {
+	case "generate":
+		slog.Warn("librariangen: generate command is not yet implemented")
+		return 1
+	case "configure":
+		slog.Warn("librariangen: configure command is not yet implemented")
+		return 1
+	case "release-init":
+		// TODO: Parse flags and read request from the release-init-request.json file
+		// Create release.Config object.
+
+		// TODO: Call container's ReleaseInit method with the parsed request
+
+		// TODO: Save the response to release-init-response.json file
+		slog.Info("librariangen: release-init command executed successfully")
+	case "build":
+		slog.Warn("librariangen: build command is not yet implemented")
+		return 1
+	default:
+		slog.Error("librariangen: unknown command: %s (with flags %v)", args[0], args)
+		return 1
+	}
+	return 0
+}

internal/librariangen/languagecontainer/release/release.go

@@ -0,0 +1,18 @@
+package release
+
+import "cloud.google.com/java/internal/librariangen/message"
+
+// The ReleaseInitContext has the directory paths for the release-init command.
+// https://github.com/googleapis/librarian/blob/main/doc/language-onboarding.md#release-init
+type ReleaseInitContext struct {
+	LibrarianDir string
+	RepoDir      string
+	OutputDir    string
+}
+
+type Config struct {
+	Context *ReleaseInitContext
+	// This request is parsed from the release-init-request.json file in
+	// the LibrarianDir of the context.
+	Request *message.ReleaseInitRequest
+}