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Add shared functions to get the stellar-core build version and protoc…
…ol version and update ledgerexporter and captivecorebackend to use these shared functions. Implement a version check for protocol 21 when creating a new captive-core instance.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package ledgerbackend | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os/exec" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| // By default, it points to exec.Command, overridden for testing purpose | ||
| var ExecCommand = exec.Command | ||
| var GetCoreProtocolVersionFunc = GetCoreProtocolVersion | ||
| var GetCoreBuildVersionFunc = GetCoreBuildVersion | ||
|
|
||
| // GetCoreBuildVersion executes the "stellar-core version" command and parses its output to extract | ||
| // the core version | ||
| // The output of the "version" command is expected to be a multi-line string where the | ||
| // first line is the core version in format "vX.Y.Z-*". | ||
| func GetCoreBuildVersion(coreBinaryPath string) (string, error) { | ||
| versionCmd := ExecCommand(coreBinaryPath, "version") | ||
| versionOutput, err := versionCmd.Output() | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to execute stellar-core version command: %w", err) | ||
| } | ||
|
|
||
| // Split the output into lines | ||
| rows := strings.Split(string(versionOutput), "\n") | ||
| if len(rows) == 0 || len(rows[0]) == 0 { | ||
| return "", fmt.Errorf("stellar-core version not found") | ||
| } | ||
|
|
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| return rows[0], nil | ||
| } | ||
|
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||
| // GetCoreProtocolVersion retrieves the ledger protocol version from the specified stellar-core binary. | ||
| // It executes the "stellar-core version" command and parses the output to extract the protocol version. | ||
| func GetCoreProtocolVersion(coreBinaryPath string) (uint, error) { | ||
| if coreBinaryPath == "" { | ||
| return 0, fmt.Errorf("stellar-core binary path is empty") | ||
| } | ||
|
|
||
| versionBytes, err := ExecCommand(coreBinaryPath, "version").Output() | ||
| if err != nil { | ||
| return 0, fmt.Errorf("error executing stellar-core version command (%s): %w", coreBinaryPath, err) | ||
| } | ||
|
|
||
| versionRows := strings.Split(string(versionBytes), "\n") | ||
| re := regexp.MustCompile(`^\s*ledger protocol version: (\d*)`) | ||
| var ledgerProtocolStrings []string | ||
| for _, line := range versionRows { | ||
| ledgerProtocolStrings = re.FindStringSubmatch(line) | ||
| if len(ledgerProtocolStrings) == 2 { | ||
| val, err := strconv.Atoi(ledgerProtocolStrings[1]) | ||
| if err != nil { | ||
| return 0, fmt.Errorf("error parsing protocol version from stellar-core output: %w", err) | ||
| } | ||
| return uint(val), nil | ||
| } | ||
| } | ||
|
|
||
| return 0, fmt.Errorf("error parsing protocol version from stellar-core output") | ||
| } | ||
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