feat(core): Add support for pairedItem (beta) (#3012)

* ✨ Add pairedItem support

* 👕 Fix lint issue

* 🐛 Fix resolution in frontend

* 🐛 Fix resolution issue

* 🐛 Fix resolution in frontend

* 🐛 Fix another resolution issue in frontend

* ⚡ Try to automatically add pairedItem data if possible

* ⚡ Cleanup

* ⚡ Display expression errors in editor UI

* 🐛 Fix issue that it did not display errors in production

* 🐛 Fix auto-fix of missing pairedItem data

* 🐛 Fix frontend resolution for not executed nodes

* ⚡ Fail execution on pairedItem resolve issue and display information
about itemIndex and runIndex

* ⚡ Allow that pairedItem is only set to number if runIndex is 0

* ✨ Improve Expression Errors

* ⚡ Remove no longer needed code

* ⚡ Make errors more helpful

* ⚡ Add additional errors

* 👕 Fix lint issue

* ⚡ Add pairedItem support to core nodes

* ⚡ Improve support in Merge-Node

* ⚡ Fix issue with not correctly converted incoming pairedItem data

* 🐛 Fix frontend resolve issue

* 🐛 Fix frontend parameter name display issue

* ⚡ Improve errors

* 👕 Fix lint issue

* ⚡ Improve errors

* ⚡ Make it possible to display parameter name in error messages

* ⚡ Improve error messages

* ⚡ Fix error message

* ⚡ Improve error messages

* ⚡ Add another error message

* ⚡ Simplify

packages/nodes-base/nodes/Ssh/Ssh.node.ts

@@ -281,7 +281,7 @@ export class Ssh implements INodeType {
 	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
 		const items = this.getInputData();
 
-		const returnData: IDataObject[] = [];
+		const returnItems: INodeExecutionData[] = [];
 
 		const resource = this.getNodeParameter('resource', 0) as string;
 		const operation = this.getNodeParameter('operation', 0) as string;
@@ -333,7 +333,12 @@ export class Ssh implements INodeType {
 
 							const command = this.getNodeParameter('command', i) as string;
 							const cwd = this.getNodeParameter('cwd', i) as string;
-							returnData.push(await ssh.execCommand(command, { cwd, }));
+							returnItems.push({
+								json: await ssh.execCommand(command, { cwd, }),
+								pairedItem: {
+									item: i,
+								},
+							});
 						}
 					}
 
@@ -352,6 +357,9 @@ export class Ssh implements INodeType {
 							const newItem: INodeExecutionData = {
 								json: items[i].json,
 								binary: {},
+								pairedItem: {
+									item: i,
+								},
 							};
 
 							if (items[i].binary !== undefined) {
@@ -395,7 +403,14 @@ export class Ssh implements INodeType {
 
 							await ssh.putFile(path, `${parameterPath}${(parameterPath.charAt(parameterPath.length - 1) === '/') ? '' : '/'}${fileName || binaryData.fileName}`);
 
-							returnData.push({ success: true });
+							returnItems.push({
+								json: {
+									success: true,
+								},
+								pairedItem: {
+									item: i,
+								},
+							});
 						}
 					}
 				} catch (error) {
@@ -407,7 +422,14 @@ export class Ssh implements INodeType {
 								},
 							};
 						} else {
-							returnData.push({ error: error.message });
+							returnItems.push({
+								json: {
+									error: error.message,
+								},
+								pairedItem: {
+									item: i,
+								},
+							});
 						}
 						continue;
 					}
@@ -428,7 +450,7 @@ export class Ssh implements INodeType {
 			// For file downloads the files get attached to the existing items
 			return this.prepareOutputData(items);
 		} else {
-			return [this.helpers.returnJsonArray(returnData)];
+			return this.prepareOutputData(returnItems);
 		}
 	}
 }