[Breaking Change][*] Chore: Use terser for optimizing cjs prod build

.github/workflows/size-limit.yml

@@ -9,7 +9,75 @@ jobs:
     env:
       CI_JOB_NUMBER: 1
     steps:
+      # See also:
+      # https://github.com/facebook/lexical/issues/6852
+      # https://github.com/NixOS/nixpkgs/blob/c8db8bd9656ee3d373ce9445063c25c47f442118/.github/workflows/check-by-name.yml#L31-L92
+      # https://github.com/getsentry/sentry/issues/22432
+      # https://github.com/getsentry/sentry/pull/22344
+      # This step has to be in this file,
+      # because it's needed to determine which revision of the repository to fetch,
+      # and we can only use other files from the repository once it's fetched.
+      - id: merge-commit
+        name: Resolving the merge commit
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          # This checks for mergeability of a pull request as recommended in
+          # https://docs.github.com/en/rest/guides/using-the-rest-api-to-interact-with-your-git-database?apiVersion=2022-11-28#checking-mergeability-of-pull-requests
+
+          # Retry the API query this many times
+          retryCount=3
+          # Start with 5 seconds, but double every retry
+          retryInterval=5
+          while true; do
+            echo "Checking whether the pull request can be merged"
+            prInfo=$(gh api \
+              -H "Accept: application/vnd.github+json" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              /repos/"$GITHUB_REPOSITORY"/pulls/${{ github.event.pull_request.number }})
+            mergeable=$(jq -r .mergeable <<< "$prInfo")
+            mergedSha=$(jq -r .merge_commit_sha <<< "$prInfo")
+
+            if [[ "$mergeable" == "null" ]]; then
+              if (( retryCount == 0 )); then
+                echo "Not retrying anymore, probably GitHub is having internal issues"
+                exit 1
+              else
+                (( retryCount -= 1 )) || true
+
+                # null indicates that GitHub is still computing whether it's mergeable
+                # Wait a couple seconds before trying again
+                echo "GitHub is still computing whether this PR can be merged, waiting $retryInterval seconds before trying again ($retryCount retries left)"
+                sleep "$retryInterval"
+
+                (( retryInterval *= 2 )) || true
+              fi
+            else
+              break
+            fi
+          done
+
+          if [[ "$mergeable" == "true" ]]; then
+            echo "The PR can be merged, checking the merge commit $mergedSha"
+          else
+            echo "The PR cannot be merged, it has a merge conflict, cancelling the workflow.."
+            gh api \
+              --method POST \
+              -H "Accept: application/vnd.github+json" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              /repos/"$GITHUB_REPOSITORY"/actions/runs/"$GITHUB_RUN_ID"/cancel
+            sleep 60
+            # If it's still not canceled after a minute, something probably went wrong, just exit
+            exit 1
+          fi
+          echo "mergedSha=$mergedSha" >> "$GITHUB_ENV"
       - uses: actions/checkout@v4
+        with:
+          # pull_request_target checks out the base branch by default
+          ref: ${{ steps.merge-commit.outputs.mergedSha }}
+          # Fetches the merge commit and its parents
+          fetch-depth: 2
       - uses: andresz1/size-limit-action@v1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
+          build_script: build-prod

.size-limit.js

@@ -24,12 +24,9 @@ const path = require('node:path');
  * Looks like:
  *
  *   {
- *     lexical: 'packages/lexical/dist/index.js',
- *     '@lexical/rich-text': 'packages/lexical-rich-text/dist/index.js',
+ *     lexical: 'packages/lexical/dist/Lexical.js',
+ *     '@lexical/rich-text': 'packages/lexical-rich-text/dist/LexicalRichText.js',
  *   }
- *
- * Currently this alias map points at the cjs version of the build product,
- * as that is what was measured previously in #3600.
  */
 const {packagesManager} = require('./scripts/shared/packagesManager');
 const getAliasType = (type) =>

package.json

@@ -110,7 +110,6 @@
     "size": "npm run build-prod && size-limit"
   },
   "devDependencies": {
-    "@ampproject/rollup-plugin-closure-compiler": "^0.27.0",
     "@babel/core": "^7.24.5",
     "@babel/eslint-parser": "^7.24.5",
     "@babel/plugin-transform-optional-catch-binding": "^7.24.1",