import { promises as fs } from 'fs'; import { Command, flags } from '@oclif/command'; import { UserSettings, } from 'n8n-core'; import { INode, } from 'n8n-workflow'; import { ActiveExecutions, Db, GenericHelpers, IWorkflowBase, IWorkflowExecutionDataProcess, LoadNodesAndCredentials, NodeTypes, WorkflowCredentials, WorkflowHelpers, WorkflowRunner, } from "../src"; export class Execute extends Command { static description = '\nExecutes a given workflow'; static examples = [ `$ n8n execute --id=5`, `$ n8n execute --file=workflow.json`, ]; static flags = { help: flags.help({ char: 'h' }), file: flags.string({ description: 'path to a workflow file to execute', }), id: flags.string({ description: 'id of the workflow to execute', }), }; async run() { const { flags } = this.parse(Execute); // Start directly with the init of the database to improve startup time const startDbInitPromise = Db.init(); // Load all node and credential types const loadNodesAndCredentials = LoadNodesAndCredentials(); const loadNodesAndCredentialsPromise = loadNodesAndCredentials.init(); if (!flags.id && !flags.file) { GenericHelpers.logOutput(`Either option "--id" or "--file" have to be set!`); return; } if (flags.id && flags.file) { GenericHelpers.logOutput(`Either "id" or "file" can be set never both!`); return; } let workflowId: string | undefined; let workflowData: IWorkflowBase | undefined = undefined; if (flags.file) { // Path to workflow is given try { workflowData = JSON.parse(await fs.readFile(flags.file, 'utf8')); } catch (error) { if (error.code === 'ENOENT') { GenericHelpers.logOutput(`The file "${flags.file}" could not be found.`); return; } throw error; } // Do a basic check if the data in the file looks right // TODO: Later check with the help of TypeScript data if it is valid or not if (workflowData === undefined || workflowData.nodes === undefined || workflowData.connections === undefined) { GenericHelpers.logOutput(`The file "${flags.file}" does not contain valid workflow data.`); return; } workflowId = workflowData.id!.toString(); } // Wait till the database is ready await startDbInitPromise; if (flags.id) { // Id of workflow is given workflowId = flags.id; workflowData = await Db.collections!.Workflow!.findOne(workflowId); if (workflowData === undefined) { GenericHelpers.logOutput(`The workflow with the id "${workflowId}" does not exist.`); return; } } // Make sure the settings exist await UserSettings.prepareUserSettings(); // Wait till the n8n-packages have been read await loadNodesAndCredentialsPromise; // Add the found types to an instance other parts of the application can use const nodeTypes = NodeTypes(); await nodeTypes.init(loadNodesAndCredentials.nodeTypes); if (!WorkflowHelpers.isWorkflowIdValid(workflowId)) { workflowId = undefined; } // Check if the workflow contains the required "Start" node // "requiredNodeTypes" are also defined in editor-ui/views/NodeView.vue const requiredNodeTypes = ['n8n-nodes-base.start']; let startNode: INode | undefined= undefined; for (const node of workflowData!.nodes) { if (requiredNodeTypes.includes(node.type)) { startNode = node; break; } } if (startNode === undefined) { // If the workflow does not contain a start-node we can not know what // should be executed and with which data to start. GenericHelpers.logOutput(`The workflow does not contain a "Start" node. So it can not be executed.`); return Promise.resolve(); } try { const credentials = await WorkflowCredentials(workflowData!.nodes); const runData: IWorkflowExecutionDataProcess = { credentials, executionMode: 'cli', startNodes: [startNode.name], workflowData: workflowData!, }; const workflowRunner = new WorkflowRunner(); const executionId = await workflowRunner.run(runData); const activeExecutions = ActiveExecutions.getInstance(); const data = await activeExecutions.getPostExecutePromise(executionId); if (data === undefined) { throw new Error('Workflow did not return any data!'); } if (data.data.resultData.error) { this.log('Execution was NOT successfull:'); this.log('===================================='); this.log(JSON.stringify(data, null, 2)); // console.log(data.data.resultData.error); const error = new Error(data.data.resultData.error.message); error.stack = data.data.resultData.error.stack; throw error; } this.log('Execution was successfull:'); this.log('===================================='); this.log(JSON.stringify(data, null, 2)); } catch (e) { console.error('\nGOT ERROR'); console.log('===================================='); console.error(e.message); console.error(e.stack); this.exit(1); return; } this.exit(); } }