fix

README.md

@@ -107,3 +107,6 @@ listener restarts and GitHub push deploy start/success/failure events, set:
 ```sh
 DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/...
 ```
+
+Deploy completion and failure notifications include a changed-file summary and a
+truncated patch preview for the pushed diff.

Tree/FallingLeaves.tsx

@@ -1,7 +1,6 @@
 import React, { useEffect, useRef } from "react";
 import { TRUNK_TOP_CSS } from "./Tree";
 
-// aaa
 interface Leaf {
   x: number;
   y: number;

webhook.cjs

@@ -74,6 +74,17 @@ function truncate(value, maxLength = 900) {
   return `${text.slice(0, maxLength - 3)}...`
 }
 
+function codeBlock(value, language = '', maxLength = 1000) {
+  const fence = language ? `\`\`\`${language}\n` : '```\n'
+  const suffix = '\n```'
+  const body = truncate(value || 'No diff returned', maxLength - fence.length - suffix.length)
+  return `${fence}${body}${suffix}`
+}
+
+function validGitSha(value) {
+  return /^[0-9a-f]{7,40}$/i.test(String(value || ''))
+}
+
 function verifySignature(rawBody, signature) {
   if (!SECRET) return true
   if (!signature || !signature.startsWith('sha256=')) return false
@@ -119,6 +130,35 @@ function run(command, args, options = {}) {
   })
 }
 
+function runCapture(command, args, options = {}) {
+  return new Promise((resolve, reject) => {
+    const label = [command, ...args].join(' ')
+    const child = spawn(commandFor(command), args, {
+      cwd: __dirname,
+      env: { ...process.env, ...options.env },
+      shell: process.platform === 'win32',
+      stdio: ['ignore', 'pipe', 'pipe'],
+    })
+    let stdout = ''
+    let stderr = ''
+
+    child.stdout.on('data', (chunk) => {
+      stdout += chunk
+    })
+    child.stderr.on('data', (chunk) => {
+      stderr += chunk
+    })
+    child.on('error', reject)
+    child.on('exit', (code) => {
+      if (code === 0) {
+        resolve(stdout.trim())
+      } else {
+        reject(new Error(`${label} exited with ${code}: ${truncate(stderr || stdout, 500)}`))
+      }
+    })
+  })
+}
+
 async function ensureBuildDependencies() {
   await run('npm', ['install', '--production=false', '--include=dev', '--include=optional'], {
     env: {
@@ -230,6 +270,44 @@ function deployFields(push) {
   return fields
 }
 
+async function deployDiff(push) {
+  const before = push?.before
+  const after = push?.after
+
+  if (!validGitSha(before) || !validGitSha(after) || /^0+$/.test(before)) {
+    return {
+      summary: 'Diff unavailable for this push range',
+      patch: push?.compare ? `Compare: ${push.compare}` : '',
+    }
+  }
+
+  const range = `${before}..${after}`
+  const [nameStatus, shortStat, patch] = await Promise.all([
+    runCapture('git', ['diff', '--name-status', '--find-renames', range]),
+    runCapture('git', ['diff', '--shortstat', range]),
+    runCapture('git', ['diff', '--find-renames', '--unified=1', range]),
+  ])
+
+  return {
+    summary: [shortStat, nameStatus].filter(Boolean).join('\n'),
+    patch,
+  }
+}
+
+function diffFields(diff) {
+  if (!diff) return []
+
+  const fields = []
+  if (diff.summary) {
+    fields.push({ name: 'Diff summary', value: codeBlock(diff.summary, 'diff'), inline: false })
+  }
+  if (diff.patch) {
+    fields.push({ name: 'Patch preview', value: codeBlock(diff.patch, 'diff'), inline: false })
+  }
+
+  return fields
+}
+
 async function notifyDeployStarted(push) {
   await sendDiscordEmbed({
     title: 'GitHub push deploy started',
@@ -239,21 +317,22 @@ async function notifyDeployStarted(push) {
   })
 }
 
-async function notifyDeployCompleted(push) {
+async function notifyDeployCompleted(push, diff) {
   await sendDiscordEmbed({
     title: 'GitHub push deploy completed',
     color: 0x00f2ff,
-    fields: deployFields(push),
+    fields: [...deployFields(push), ...diffFields(diff)],
     timestamp: new Date().toISOString(),
   })
 }
 
-async function notifyDeployFailed(push, error) {
+async function notifyDeployFailed(push, error, diff) {
   await sendDiscordEmbed({
     title: 'GitHub push deploy failed',
     color: 0xe82517,
     fields: [
       ...deployFields(push),
+      ...diffFields(diff),
       { name: 'Error', value: truncate(error?.message || error), inline: false },
     ],
     timestamp: new Date().toISOString(),
@@ -261,16 +340,24 @@ async function notifyDeployFailed(push, error) {
 }
 
 async function deploy(push) {
-  await notifyDeployStarted(push)
-  await run('git', ['pull', '--ff-only'])
-  await ensureBuildDependencies()
-  await run('npm', ['run', 'build'])
+  let diff = null
 
-  for (const target of RESTART_TARGETS) {
-    await run('pm2', ['reload', target, '--update-env'])
+  try {
+    await notifyDeployStarted(push)
+    await run('git', ['pull', '--ff-only'])
+    diff = await deployDiff(push)
+    await ensureBuildDependencies()
+    await run('npm', ['run', 'build'])
+
+    for (const target of RESTART_TARGETS) {
+      await run('pm2', ['reload', target, '--update-env'])
+    }
+
+    await notifyDeployCompleted(push, diff)
+  } catch (error) {
+    error.deployDiff = diff
+    throw error
   }
-
-  await notifyDeployCompleted(push)
 }
 
 http
@@ -313,7 +400,7 @@ http
         .then(() => console.log('GitHub push deploy completed'))
         .catch((error) => {
           console.error('GitHub push deploy failed:', error)
-          notifyDeployFailed(push, error)
+          notifyDeployFailed(push, error, error.deployDiff)
         })
         .finally(() => {
           deploying = false