first attempt to export from API Gateway

cmd/registry-connect/discover/apigateway/apigateway.go

@@ -0,0 +1,29 @@
+// 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.
+
+package apigateway
+
+import (
+	"github.com/apigee/registry-experimental/cmd/registry-connect/discover/apigateway/gateways"
+	"github.com/spf13/cobra"
+)
+
+func Command() *cobra.Command {
+	var cmd = &cobra.Command{
+		Use:   "apigateway",
+		Short: "Registry commands relating to API Gateway",
+	}
+	cmd.AddCommand(gateways.Command())
+	return cmd
+}

cmd/registry-connect/discover/apigateway/gateways/gateways.go

@@ -0,0 +1,282 @@
+// 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.
+
+package gateways
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/apigee/registry/pkg/encoding"
+	"github.com/spf13/cobra"
+)
+
+const weNeedToReadAPIs = false
+
+func Command() *cobra.Command {
+	var output string
+	var cmd = &cobra.Command{
+		Use:   "gateways",
+		Short: "Export API Gateway Gateways",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) (err error) {
+			project, err := getProject()
+			if err != nil {
+				return err
+			}
+			if weNeedToReadAPIs {
+				apis, err := fetchApis()
+				if err != nil {
+					return err
+				}
+				for i, api := range apis {
+					fmt.Printf("%d %+v\n", i, api)
+				}
+			}
+			gateways, err := fetchGateways()
+			if err != nil {
+				return err
+			}
+			for _, gateway := range gateways {
+				fmt.Printf("exporting %s\n", gateway.Name)
+				config, err := fetchConfig(gateway.ApiConfig)
+				if err != nil {
+					return err
+				}
+				err = writeRegistryYAML(output, project, &gateway, config)
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+	}
+	cmd.Flags().StringVar(&output, "output", "gateway-export", "output directory")
+
+	return cmd
+}
+
+func getProject() (string, error) {
+	buf := &bytes.Buffer{}
+	command := "gcloud config get project"
+	cmdargs := strings.Split(command, " ")
+	c := exec.Command(cmdargs[0], cmdargs[1:]...)
+	c.Stdout = buf
+	if err := c.Run(); err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(buf.String()), nil
+}
+
+func fetchApis() ([]GatewayApi, error) {
+	buf := &bytes.Buffer{}
+	command := "gcloud api-gateway apis list --format json"
+	cmdargs := strings.Split(command, " ")
+	c := exec.Command(cmdargs[0], cmdargs[1:]...)
+	c.Stdout = buf
+	if err := c.Run(); err != nil {
+		return nil, err
+	}
+	var apis []GatewayApi
+	if err := json.Unmarshal(buf.Bytes(), &apis); err != nil {
+		return nil, err
+	}
+	return apis, nil
+}
+
+func fetchGateways() ([]Gateway, error) {
+	buf := &bytes.Buffer{}
+	command := "gcloud api-gateway gateways list --format json"
+	cmdargs := strings.Split(command, " ")
+	c := exec.Command(cmdargs[0], cmdargs[1:]...)
+	c.Stdout = buf
+	if err := c.Run(); err != nil {
+		return nil, err
+	}
+	var gateways []Gateway
+	if err := json.Unmarshal(buf.Bytes(), &gateways); err != nil {
+		return nil, err
+	}
+	return gateways, nil
+}
+
+func fetchConfig(name string) (*GatewayConfig, error) {
+	buf := &bytes.Buffer{}
+	command := "gcloud api-gateway api-configs describe --view FULL --format json " + name
+	cmdargs := strings.Split(command, " ")
+	c := exec.Command(cmdargs[0], cmdargs[1:]...)
+	c.Stdout = buf
+	if err := c.Run(); err != nil {
+		return nil, err
+	}
+	var config GatewayConfig
+	if err := json.Unmarshal(buf.Bytes(), &config); err != nil {
+		return nil, err
+	}
+	return &config, nil
+}
+
+type GatewayApi struct {
+	CreateTime     string `json:"createTime"`
+	DisplayName    string `json:"displayName"`
+	ManagedService string `json:"managedService"`
+	Name           string `json:"name"`
+	State          string `json:"state"`
+	UpdateTime     string `json:"updateTime"`
+}
+
+type Gateway struct {
+	ApiConfig       string `json:"apiConfig"`
+	CreateTime      string `json:"createTime"`
+	DefaultHostname string `json:"defaultHostname"`
+	DisplayName     string `json:"displayName"`
+	Name            string `json:"name"`
+	State           string `json:"state"`
+	UpdateTime      string `json:"updateTime"`
+}
+
+type GatewayConfig struct {
+	CreateTime            string                     `json:"createTime"`
+	DisplayName           string                     `json:"displayName"`
+	GatewayServiceAccount string                     `json:"gatewayServiceAccount"`
+	GrpcServices          []map[string][]GatewayFile `json:"grpcServices"`
+	ManagedServiceConfigs []*GatewayFile             `json:"managedServiceConfigs"`
+	OpenAPIDocuments      []map[string]GatewayFile   `json:"openapiDocuments"`
+	Name                  string                     `json:"name"`
+	ServiceConfigId       string                     `json:"serviceConfigId"`
+	State                 string                     `json:"state"`
+	UpdateTime            string                     `json:"updateTime"`
+}
+
+type GatewayFile struct {
+	Contents string `json:"contents"`
+	Path     string `json:"path"`
+}
+
+func writeRegistryYAML(output, project string, gateway *Gateway, config *GatewayConfig) error {
+	apiId := filepath.Base(gateway.Name)
+	err := os.MkdirAll(filepath.Join(output, project+"-"+apiId), 0777)
+	if err != nil {
+		return err
+	}
+	description := "Exported from API Gateway"
+
+	specname := "openapi"
+	filename := "openapi.yaml"
+	mimetype := "application/x.openapi+gzip;version=2.0"
+	if config.GrpcServices != nil {
+		specname = "protos"
+		filename = "protos.zip"
+		mimetype = "application/x.proto+zip"
+	}
+	a := &encoding.Api{
+		Header: encoding.Header{
+			ApiVersion: "apigeeregistry/v1",
+			Kind:       "API",
+			Metadata: encoding.Metadata{
+				Name: project + "-" + apiId,
+				Labels: map[string]string{
+					"provider": strings.ReplaceAll(project, ".", "-"),
+				},
+			},
+		},
+		Data: encoding.ApiData{
+			DisplayName: project + " gateway " + apiId,
+			Description: description,
+			ApiVersions: []*encoding.ApiVersion{
+				{
+					Header: encoding.Header{
+						Metadata: encoding.Metadata{
+							Name: "v1",
+						},
+					},
+					Data: encoding.ApiVersionData{
+						DisplayName: "v1",
+						ApiSpecs: []*encoding.ApiSpec{
+							{
+								Header: encoding.Header{
+									Metadata: encoding.Metadata{
+										Name: specname,
+									},
+								},
+								Data: encoding.ApiSpecData{
+									FileName: filename,
+									MimeType: mimetype,
+								},
+							},
+						},
+					},
+				},
+			},
+			ApiDeployments: []*encoding.ApiDeployment{
+				{
+					Header: encoding.Header{
+						Metadata: encoding.Metadata{
+							Name: "gateway",
+						},
+					},
+					Data: encoding.ApiDeploymentData{
+						DisplayName: "gateway",
+						EndpointURI: "https://" + gateway.DefaultHostname,
+					},
+				},
+			},
+		},
+	}
+	b, err := encoding.EncodeYAML(a)
+	if err != nil {
+		panic(err)
+	}
+	if err = os.WriteFile(filepath.Join(output, project+"-"+apiId, "info.yaml"), b, 0666); err != nil {
+		return err
+	}
+	for _, openapi := range config.OpenAPIDocuments {
+		f := openapi["document"]
+		contents, err := base64.StdEncoding.DecodeString(f.Contents)
+		if err != nil {
+			return err
+		}
+		if err = os.WriteFile(filepath.Join(output, project+"-"+apiId, f.Path), contents, 0666); err != nil {
+			return err
+		}
+	}
+	for _, grpcService := range config.GrpcServices {
+		files := grpcService["source"]
+		for _, f := range files {
+			contents, err := base64.StdEncoding.DecodeString(f.Contents)
+			if err != nil {
+				return err
+			}
+			if err = os.WriteFile(filepath.Join(output, project+"-"+apiId, f.Path), contents, 0666); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range config.ManagedServiceConfigs {
+		contents, err := base64.StdEncoding.DecodeString(f.Contents)
+		if err != nil {
+			return err
+		}
+		if err = os.WriteFile(filepath.Join(output, project+"-"+apiId, f.Path), contents, 0666); err != nil {
+			return err
+		}
+	}
+	return nil
+}

cmd/registry-connect/discover/discover.go

@@ -15,6 +15,7 @@
 package discover
 
 import (
+	"github.com/apigee/registry-experimental/cmd/registry-connect/discover/apigateway"
 	"github.com/apigee/registry-experimental/cmd/registry-connect/discover/apigee"
 	"github.com/spf13/cobra"
 )
@@ -26,5 +27,6 @@ func Command() *cobra.Command {
 		Args:  cobra.NoArgs,
 	}
 	cmd.AddCommand(apigee.Command())
+	cmd.AddCommand(apigateway.Command())
 	return cmd
 }