From 71b39d6f53d47ce200ddd797a3ef0f27ff7a82ac Mon Sep 17 00:00:00 2001
From: teidesu <86301490+teidesu@users.noreply.github.com>
Date: Sun, 30 Oct 2022 18:38:31 +0300
Subject: [PATCH] feat(tl): generate diff file for simpler update flow

primarily for my own use
---
 packages/tl/.gitignore           |  2 ++
 packages/tl/scripts/constants.ts |  1 +
 packages/tl/scripts/fetch-api.ts | 14 +++++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/packages/tl/.gitignore b/packages/tl/.gitignore
index 69f81f26..1e8270be 100644
--- a/packages/tl/.gitignore
+++ b/packages/tl/.gitignore
@@ -4,3 +4,5 @@ errors.d.ts
 errors.js
 binary/reader.js
 binary/writer.js
+
+diff.json
diff --git a/packages/tl/scripts/constants.ts b/packages/tl/scripts/constants.ts
index 97dbe9c4..1482c212 100644
--- a/packages/tl/scripts/constants.ts
+++ b/packages/tl/scripts/constants.ts
@@ -6,6 +6,7 @@ export const DESCRIPTIONS_YAML_FILE = join(
     '../data/descriptions.yaml'
 )
 export const API_SCHEMA_JSON_FILE = join(__dirname, '../api-schema.json')
+export const API_SCHEMA_DIFF_JSON_FILE = join(__dirname, '../diff.json')
 export const MTP_SCHEMA_JSON_FILE = join(__dirname, '../mtp-schema.json')
 export const ERRORS_JSON_FILE = join(__dirname, '../raw-errors.json')
 
diff --git a/packages/tl/scripts/fetch-api.ts b/packages/tl/scripts/fetch-api.ts
index 93bc6dac..446385bd 100644
--- a/packages/tl/scripts/fetch-api.ts
+++ b/packages/tl/scripts/fetch-api.ts
@@ -12,6 +12,7 @@ import {
     TlEntry,
     TlFullSchema,
     writeTlEntryToString,
+    generateTlSchemasDifference,
 } from '@mtcute/tl-utils'
 import { readdir, readFile, writeFile } from 'fs/promises'
 import { join } from 'path'
@@ -25,6 +26,7 @@ import {
     TDLIB_SCHEMA,
     COREFORK_DOMAIN,
     BLOGFORK_DOMAIN,
+    API_SCHEMA_DIFF_JSON_FILE,
 } from './constants'
 import { fetchRetry } from './utils'
 import {
@@ -32,7 +34,7 @@ import {
     fetchDocumentation,
     getCachedDocumentation,
 } from './documentation'
-import { packTlSchema } from './schema'
+import { packTlSchema, unpackTlSchema } from "./schema";
 import { bumpVersion } from '../../../scripts/version'
 
 const README_MD_FILE = join(__dirname, '../README.md')
@@ -313,6 +315,16 @@ async function main() {
 
     await overrideInt53(resultSchema)
 
+    console.log('Writing diff to file...')
+    const oldSchema = unpackTlSchema(JSON.parse(await readFile(API_SCHEMA_JSON_FILE, 'utf8')))
+    await writeFile(
+        API_SCHEMA_DIFF_JSON_FILE,
+        JSON.stringify({
+            layer: [oldSchema[1], resultLayer],
+            diff: generateTlSchemasDifference(oldSchema[0], resultSchema),
+        }, null, 4)
+    )
+
     console.log('Writing result to file...')
     await writeFile(
         API_SCHEMA_JSON_FILE,