fix: run the update example deps script in master and not in ci (#3515)

Do the work all in the js script, not half in js and half in the npm
script.

package.json

@@ -46,7 +46,7 @@
     "release:post:remove-hoisted-modules": "json -I -f ./lerna.json -e \"delete this.command.bootstrap.nohoist\"",
     "release:post:remove-examples": "json -I -f ./lerna.json -e \"this.packages = this.packages.filter(p => !p.includes('examples'))\"",
     "release:post:revert-ignore-changes-to-lerna-config": "git update-index --no-assume-unchanged ./lerna.json",
-    "release:post:update-example-dependencies": "node scripts/update-example-deps.js && git add examples && git commit -m 'chore: updated example dependencies' && git push",
+    "release:post:update-example-dependencies": "node scripts/update-example-deps.js",
     "release:rc": "run-s release:pre:* release:canary release:post:*",
     "release:canary": "lerna publish --canary --preid rc --dist-tag next --force-publish --yes",
     "docker:rc": "run-s docker:rc:*",
@@ -57,6 +57,7 @@
     "docker:rc:push-rc": "docker push ipfs/js-ipfs:v`npm show ipfs@next version -q`"
   },
   "devDependencies": {
+    "execa": "^5.0.0",
     "json": "^10.0.0",
     "lerna": "^3.22.0",
     "npm-run-all": "^4.1.5",

scripts/update-example-deps.js

@@ -2,6 +2,7 @@
 
 const path = require('path')
 const fs = require('fs')
+const execa = require('execa')
 
 // Where an example depends on `"ipfs": "^0.51.0"` and we've just released `ipfs@0.52.0`,
 // go through all of the examples and update the version to `"ipfs": "^0.52.0"` - do
@@ -12,6 +13,22 @@ const EXAMPLES_DIR = path.resolve(__dirname, '../examples')
 const DEP_TYPES = ['dependencies', 'devDependencies', 'optionalDependencies', 'peerDependencies']
 
 async function main () {
+  const {
+    stdout: branch
+  } = await execa('git', ['rev-parse', '--abbrev-ref', 'HEAD'])
+
+  if (branch !== 'master') {
+    console.info(`Not running on branch ${branch}`)
+    return
+  }
+
+  if (process.env.CI) {
+    console.info('Not running in CI')
+    return
+  }
+
+  console.info('Running on branch', branch)
+
   for (const dir of fs.readdirSync(PACKAGES_DIR)) {
     const projectPkgPath = path.resolve(PACKAGES_DIR, dir, 'package.json')
 
@@ -45,9 +62,26 @@ async function main () {
       }
     }
   }
+
+  await execa('git', ['add', 'examples'])
+
+  const {
+    stdout: updated
+  } = await execa('git', ['status', '--porcelain'])
+
+  console.info(updated)
+
+  if (!updated.match(/^M\s+examples/g)) {
+    console.info('No examples were updated')
+    return
+  }
+
+  console.info('Pushing updated dependencies')
+  await execa('git', ['commit', '-m', '"chore: updated example dependencies"'])
+  await execa('git', ['push'])
 }
 
 main().catch(err => {
   console.error(err)
   process.exit(1)
-})
+})