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| 1 | +/* |
| 2 | +Copyright IBM Corp. All Rights Reserved. |
| 3 | +
|
| 4 | +SPDX-License-Identifier: Apache-2.0 |
| 5 | +*/ |
| 6 | + |
| 7 | +package main |
| 8 | + |
| 9 | +import ( |
| 10 | + "bytes" |
| 11 | + "encoding/json" |
| 12 | + "fmt" |
| 13 | + "log" |
| 14 | + "os" |
| 15 | + "path/filepath" |
| 16 | + "strings" |
| 17 | + "text/template" |
| 18 | + |
| 19 | + "github.com/otiai10/copy" |
| 20 | + "github.com/pkg/errors" |
| 21 | +) |
| 22 | + |
| 23 | +var logger = log.New(os.Stderr, "", 0) |
| 24 | + |
| 25 | +type chaincodeMetadata struct { |
| 26 | + Type string `json:"type"` |
| 27 | +} |
| 28 | + |
| 29 | +// Connection structure is used to represent the |
| 30 | +// connection.json file that is supplied in the |
| 31 | +// chaincode package. |
| 32 | +type connection struct { |
| 33 | + Address string `json:"address"` |
| 34 | + DialTimeout string `json:"dial_timeout"` |
| 35 | + TLS bool `json:"tls_required"` |
| 36 | + ClientAuth bool `json:"client_auth_required"` |
| 37 | + RootCert string `json:"root_cert"` |
| 38 | + ClientKey string `json:"client_key"` |
| 39 | + ClientCert string `json:"client_cert"` |
| 40 | +} |
| 41 | + |
| 42 | +type Config struct { |
| 43 | + PeerName string |
| 44 | +} |
| 45 | + |
| 46 | +func main() { |
| 47 | + logger.Println("::Build") |
| 48 | + |
| 49 | + if err := run(); err != nil { |
| 50 | + logger.Printf("::Error: %v\n", err) |
| 51 | + os.Exit(1) |
| 52 | + } |
| 53 | + |
| 54 | + logger.Printf("::Build phase completed") |
| 55 | + |
| 56 | +} |
| 57 | + |
| 58 | +func run() error { |
| 59 | + if len(os.Args) < 4 { |
| 60 | + return fmt.Errorf("incorrect number of arguments") |
| 61 | + } |
| 62 | + |
| 63 | + sourceDir, metadataDir, outputDir := os.Args[1], os.Args[2], os.Args[3] |
| 64 | + |
| 65 | + connectionSrcFile := filepath.Join(sourceDir, "/connection.json") |
| 66 | + metadataFile := filepath.Clean(filepath.Join(metadataDir, "metadata.json")) |
| 67 | + connectionDestFile := filepath.Join(outputDir, "/connection.json") |
| 68 | + metainfoSrcDir := filepath.Join(sourceDir, "META-INF") |
| 69 | + metainfoDestDir := filepath.Join(outputDir, "META-INF") |
| 70 | + |
| 71 | + // Process and check the metadata file, then copy to the output location |
| 72 | + if _, err := os.Stat(metadataFile); err != nil { |
| 73 | + return errors.WithMessagef(err, "%s not found ", metadataFile) |
| 74 | + } |
| 75 | + |
| 76 | + metadataFileContents, cause := os.ReadFile(metadataFile) |
| 77 | + if cause != nil { |
| 78 | + return errors.WithMessagef(cause, "%s file not readable", metadataFile) |
| 79 | + } |
| 80 | + |
| 81 | + var metadata chaincodeMetadata |
| 82 | + if err := json.Unmarshal(metadataFileContents, &metadata); err != nil { |
| 83 | + return errors.WithMessage(err, "Unable to parse JSON") |
| 84 | + } |
| 85 | + |
| 86 | + if strings.ToLower(metadata.Type) != "external" { |
| 87 | + return fmt.Errorf("chaincode type should be external, it is %s", metadata.Type) |
| 88 | + } |
| 89 | + |
| 90 | + if err := copy.Copy(metadataDir, outputDir); err != nil { |
| 91 | + return fmt.Errorf("failed to copy build metadata folder: %s", err) |
| 92 | + } |
| 93 | + |
| 94 | + if _, err := os.Stat(metainfoSrcDir); !os.IsNotExist(err) { |
| 95 | + if err := copy.Copy(metainfoSrcDir, metainfoDestDir); err != nil { |
| 96 | + return fmt.Errorf("failed to copy build META-INF folder: %s", err) |
| 97 | + } |
| 98 | + } |
| 99 | + |
| 100 | + // Process and update the connections file |
| 101 | + fileInfo, err := os.Stat(connectionSrcFile) |
| 102 | + if err != nil { |
| 103 | + return errors.WithMessagef(err, "%s not found ", connectionSrcFile) |
| 104 | + } |
| 105 | + |
| 106 | + connectionFileContents, err := os.ReadFile(connectionSrcFile) |
| 107 | + if err != nil { |
| 108 | + return err |
| 109 | + } |
| 110 | + |
| 111 | + // read the connection.json file into structure to process |
| 112 | + var connectionData connection |
| 113 | + if err := json.Unmarshal(connectionFileContents, &connectionData); err != nil { |
| 114 | + return err |
| 115 | + } |
| 116 | + |
| 117 | + // Treat each of the string fields in the connection.json as Go template |
| 118 | + // strings. They can be fixed strings, but if they are templates |
| 119 | + // then the JSON string that is defined in CHAINCODE_AS_A_SERVICE_BUILDER_CONFIG |
| 120 | + // is used as the 'context' to parse the string |
| 121 | + |
| 122 | + updatedConnection := connection{} |
| 123 | + var cfg map[string]interface{} |
| 124 | + |
| 125 | + cfgString := os.Getenv("CHAINCODE_AS_A_SERVICE_BUILDER_CONFIG") |
| 126 | + if cfgString != "" { |
| 127 | + if err := json.Unmarshal([]byte(cfgString), &cfg); err != nil { |
| 128 | + return fmt.Errorf("Failed to unmarshal %s", err) |
| 129 | + } |
| 130 | + } |
| 131 | + |
| 132 | + updatedConnection.Address, err = execTempl(cfg, connectionData.Address) |
| 133 | + if err != nil { |
| 134 | + return fmt.Errorf("Failed to parse the Address field template: %s", err) |
| 135 | + } |
| 136 | + |
| 137 | + updatedConnection.DialTimeout, err = execTempl(cfg, connectionData.DialTimeout) |
| 138 | + if err != nil { |
| 139 | + return fmt.Errorf("Failed to parse the DialTimeout field template: %s", err) |
| 140 | + } |
| 141 | + |
| 142 | + // if connection is TLS Enabled, updated with the correct information |
| 143 | + // no other information is needed for the no-TLS case, so the default can be assumed |
| 144 | + // to be good |
| 145 | + if connectionData.TLS { |
| 146 | + updatedConnection.TLS = true |
| 147 | + updatedConnection.ClientAuth = connectionData.ClientAuth |
| 148 | + |
| 149 | + updatedConnection.RootCert, err = execTempl(cfg, connectionData.RootCert) |
| 150 | + if err != nil { |
| 151 | + return fmt.Errorf("Failed to parse the RootCert field template: %s", err) |
| 152 | + } |
| 153 | + updatedConnection.ClientKey, err = execTempl(cfg, connectionData.ClientKey) |
| 154 | + if err != nil { |
| 155 | + return fmt.Errorf("Failed to parse the ClientKey field template: %s", err) |
| 156 | + } |
| 157 | + updatedConnection.ClientCert, err = execTempl(cfg, connectionData.ClientCert) |
| 158 | + if err != nil { |
| 159 | + return fmt.Errorf("Failed to parse the ClientCert field template: %s", err) |
| 160 | + } |
| 161 | + } |
| 162 | + |
| 163 | + updatedConnectionBytes, err := json.Marshal(updatedConnection) |
| 164 | + if err != nil { |
| 165 | + return fmt.Errorf("failed to marshal updated connection.json file: %s", err) |
| 166 | + } |
| 167 | + |
| 168 | + err = os.WriteFile(connectionDestFile, updatedConnectionBytes, fileInfo.Mode()) |
| 169 | + if err != nil { |
| 170 | + return err |
| 171 | + } |
| 172 | + |
| 173 | + return nil |
| 174 | + |
| 175 | +} |
| 176 | + |
| 177 | +// execTempl is a helper function to process a template against a string, and return a string |
| 178 | +func execTempl(cfg map[string]interface{}, inputStr string) (string, error) { |
| 179 | + |
| 180 | + t, err := template.New("").Option("missingkey=error").Parse(inputStr) |
| 181 | + if err != nil { |
| 182 | + fmt.Printf("Failed to parse the template: %s", err) |
| 183 | + return "", err |
| 184 | + } |
| 185 | + |
| 186 | + buf := &bytes.Buffer{} |
| 187 | + err = t.Execute(buf, cfg) |
| 188 | + if err != nil { |
| 189 | + return "", err |
| 190 | + } |
| 191 | + |
| 192 | + return buf.String(), nil |
| 193 | +} |
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