The workflow JSON
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{
"nodes": [
{
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
880,
540
],
"parameters": {
"content": "## Edit your own prompt \u2b07\ufe0f\n"
},
"typeVersion": 1
},
{
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-380,
580
],
"parameters": {
"content": "## Filter comments and customize your trigger words \u2b07\ufe0f"
},
"typeVersion": 1
},
{
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-120,
560
],
"parameters": {
"content": "## Replace your gitlab URL and token \u2b07\ufe0f"
},
"typeVersion": 1
},
{
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-540,
760
],
"parameters": {
"path": "e21095c0-1876-4cd9-9e92-a2eac737f03e",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 1.1
},
{
"name": "Code",
"type": "n8n-nodes-base.code",
"position": [
720,
540
],
"parameters": {
"mode": "runOnceForEachItem",
"jsCode": "// Loop over input items and add a new field called 'myNewField' to the JSON of each one\nvar diff = $input.item.json.gitDiff\n\nlet lines = diff.trimEnd().split('\\n');\n\nlet originalCode = '';\nlet newCode = '';\n\nlines.forEach(line => {\n console.log(line)\n if (line.startsWith('-')) {\n originalCode += line + \"\\n\";\n } else if (line.startsWith('+')) {\n newCode += line + \"\\n\";\n } else {\n originalCode += line + \"\\n\";\n newCode += line + \"\\n\";\n }\n});\n\nreturn {\n originalCode:originalCode,\n newCode:newCode\n};\n\n"
},
"typeVersion": 2
},
{
"name": "Split Out1",
"type": "n8n-nodes-base.splitOut",
"position": [
140,
740
],
"parameters": {
"options": {},
"fieldToSplitOut": "changes"
},
"typeVersion": 1
},
{
"name": "OpenAI Chat Model1",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
900,
860
],
"parameters": {
"options": {
"baseURL": ""
}
},
"typeVersion": 1
},
{
"name": "Get Changes1",
"type": "n8n-nodes-base.httpRequest",
"position": [
-60,
740
],
"parameters": {
"url": "=https://gitlab.com/api/v4/projects/{{ $json[\"body\"][\"project_id\"] }}/merge_requests/{{ $json[\"body\"][\"merge_request\"][\"iid\"] }}/changes",
"options": {},
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "PRIVATE-TOKEN"
}
]
}
},
"typeVersion": 4.1
},
{
"name": "Skip File Change1",
"type": "n8n-nodes-base.if",
"position": [
340,
740
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "boolean",
"operation": "false",
"singleValue": true
},
"leftValue": "={{ $json.renamed_file }}",
"rightValue": ""
},
{
"operator": {
"type": "boolean",
"operation": "false",
"singleValue": true
},
"leftValue": "={{ $json.deleted_file }}",
"rightValue": ""
},
{
"operator": {
"type": "string",
"operation": "startsWith"
},
"leftValue": "={{ $json.diff }}",
"rightValue": "@@"
}
]
}
},
"typeVersion": 2
},
{
"name": "Parse Last Diff Line1",
"type": "n8n-nodes-base.code",
"position": [
540,
540
],
"parameters": {
"mode": "runOnceForEachItem",
"jsCode": "const parseLastDiff = (gitDiff) => {\n gitDiff = gitDiff.replace(/\\n\\\\ No newline at end of file/, '')\n \n const diffList = gitDiff.trimEnd().split('\\n').reverse();\n const lastLineFirstChar = diffList?.[0]?.[0];\n const lastDiff =\n diffList.find((item) => {\n return /^@@ \\-\\d+,\\d+ \\+\\d+,\\d+ @@/g.test(item);\n }) || '';\n\n const [lastOldLineCount, lastNewLineCount] = lastDiff\n .replace(/@@ \\-(\\d+),(\\d+) \\+(\\d+),(\\d+) @@.*/g, ($0, $1, $2, $3, $4) => {\n return `${+$1 + +$2},${+$3 + +$4}`;\n })\n .split(',');\n \n if (!/^\\d+$/.test(lastOldLineCount) || !/^\\d+$/.test(lastNewLineCount)) {\n return {\n lastOldLine: -1,\n lastNewLine: -1,\n gitDiff,\n };\n }\n\n\n const lastOldLine = lastLineFirstChar === '+' ? null : (parseInt(lastOldLineCount) || 0) - 1;\n const lastNewLine = lastLineFirstChar === '-' ? null : (parseInt(lastNewLineCount) || 0) - 1;\n\n return {\n lastOldLine,\n lastNewLine,\n gitDiff,\n };\n};\n\nreturn parseLastDiff($input.item.json.diff)\n"
},
"typeVersion": 2
},
{
"name": "Post Discussions1",
"type": "n8n-nodes-base.httpRequest",
"position": [
1280,
720
],
"parameters": {
"url": "=https://gitlab.com/api/v4/projects/{{ $('Webhook').item.json[\"body\"][\"project_id\"] }}/merge_requests/{{ $('Webhook').item.json[\"body\"][\"merge_request\"][\"iid\"] }}/discussions",
"method": "POST",
"options": {},
"sendBody": true,
"contentType": "multipart-form-data",
"sendHeaders": true,
"bodyParameters": {
"parameters": [
{
"name": "body",
"value": "={{ $('Basic LLM Chain1').item.json[\"text\"] }}"
},
{
"name": "position[position_type]",
"value": "text"
},
{
"name": "position[old_path]",
"value": "={{ $('Split Out1').item.json.old_path }}"
},
{
"name": "position[new_path]",
"value": "={{ $('Split Out1').item.json.new_path }}"
},
{
"name": "position[start_sha]",
"value": "={{ $('Get Changes1').item.json.diff_refs.start_sha }}"
},
{
"name": "position[head_sha]",
"value": "={{ $('Get Changes1').item.json.diff_refs.head_sha }}"
},
{
"name": "position[base_sha]",
"value": "={{ $('Get Changes1').item.json.diff_refs.base_sha }}"
},
{
"name": "position[new_line]",
"value": "={{ $('Parse Last Diff Line1').item.json.lastNewLine || '' }}"
},
{
"name": "position[old_line]",
"value": "={{ $('Parse Last Diff Line1').item.json.lastOldLine || '' }}"
}
]
},
"headerParameters": {
"parameters": [
{
"name": "PRIVATE-TOKEN"
}
]
}
},
"typeVersion": 4.1
},
{
"name": "Need Review1",
"type": "n8n-nodes-base.if",
"position": [
-320,
760
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.body.object_attributes.note }}",
"rightValue": "+0"
}
]
}
},
"typeVersion": 2
},
{
"name": "Basic LLM Chain1",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
880,
720
],
"parameters": {
"prompt": "=File path\uff1a{{ $('Skip File Change1').item.json.new_path }}\n\n```Original code\n {{ $json.originalCode }}\n```\nchange to\n```New code\n {{ $json.newCode }}\n```\nPlease review the code changes in this section:",
"messages": {
"messageValues": [
{
"message": "# Overview:\n You are a senior programming expert Bot, responsible for reviewing code changes and providing review recommendations.\n At the beginning of the suggestion, it is necessary to clearly make a decision to \"reject\" or \"accept\" the code change, and rate the change in the format \"Change Score: Actual Score\", with a score range of 0-100 points.\n Then, point out the existing problems in concise language and a stern tone.\n If you feel it is necessary, you can directly provide the modified content.\n Your review proposal must use rigorous Markdown format."
}
]
}
},
"typeVersion": 1.2
},
{
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
1200,
540
],
"parameters": {
"content": "## Replace your gitlab URL and token \u2b07\ufe0f"
},
"typeVersion": 1
}
],
"connections": {
"Code": {
"main": [
[
{
"node": "Basic LLM Chain1",
"type": "main",
"index": 0
}
]
]
},
"Webhook": {
"main": [
[
{
"node": "Need Review1",
"type": "main",
"index": 0
}
]
]
},
"Split Out1": {
"main": [
[
{
"node": "Skip File Change1",
"type": "main",
"index": 0
}
]
]
},
"Get Changes1": {
"main": [
[
{
"node": "Split Out1",
"type": "main",
"index": 0
}
]
]
},
"Need Review1": {
"main": [
[
{
"node": "Get Changes1",
"type": "main",
"index": 0
}
]
]
},
"Basic LLM Chain1": {
"main": [
[
{
"node": "Post Discussions1",
"type": "main",
"index": 0
}
]
]
},
"Skip File Change1": {
"main": [
[
{
"node": "Parse Last Diff Line1",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model1": {
"ai_languageModel": [
[
{
"node": "Basic LLM Chain1",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Parse Last Diff Line1": {
"main": [
[
{
"node": "Code",
"type": "main",
"index": 0
}
]
]
}
}
}
About this workflow
Chatgpt Automatic Code Review In Gitlab Mr. Uses stickyNote, splitOut, lmChatOpenAi, httpRequest. Webhook trigger; 14 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →