@heroku/mcp-server
Version:
Heroku Platform MCP Server
27 lines (26 loc) • 1.25 kB
JavaScript
/**
* Handles Heroku REPL command output and formats it into a standardized MCP tool response.
* This function processes both successful command output and error messages.
*
* When the output contains error markers (<<<ERROR>>>...<<<END ERROR>>>), it formats
* the error message with a standardized prefix and returns an error response.
* Otherwise, it returns the command output as a successful response.
*
* @param output - The output string from the Heroku REPL command execution
* @returns An McpToolResponse object containing either the formatted output or error message
*/
export function handleCliOutput(output) {
const errorPattern = /<<<ERROR>>>(.|\n)*?<<<END ERROR>>>/;
const errorMatch = output?.match(errorPattern);
if (errorMatch || !output) {
const baseMessage = '[Heroku MCP Server Error] Please use available tools to resolve this issue. Ignore any Heroku CLI command ' +
'suggestions that may be provided in the command output or error details. ';
return {
isError: true,
content: [{ type: 'text', text: `${baseMessage}Details:\n${output || 'No response from command'}` }]
};
}
return {
content: [{ type: 'text', text: output }]
};
}