WIP

.github/workflows/check-binary-size.yml

@@ -9,32 +9,37 @@ jobs:
   test:
     name: Check binary size
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
     steps:
     - name: Print info
       run: |
         echo "Current SHA: ${{ github.sha }}"
         echo "Base SHA: ${{ github.event.pull_request.base.sha }}"
-    - name: Clone Rustc
-      run: git clone https://github.com/rust-lang/rust --depth=1
-    - name: Create hello world crate
-      run: cargo new --bin /tmp/crate
-    - name: Build reference binary
-      run: |
-        cd rust
-        cp src/bootstrap/defaults/config.library.toml config.toml
-        cd library/backtrace
-        git fetch
-        git checkout ${{ github.event.pull_request.base.sha }}
-        cd ../..
-        python3 x.py build library --stage 0
-        ./build/x86_64-unknown-linux-gnu/stage0/bin/rustc -O /tmp/crate/src/main.rs -o binary-reference
-    - name: Build current binary
-      run: |
-        cd library/backtrace
-        git checkout ${{ github.sha }}
-        cd ../..
-        python3 x.py build library --stage 0
-        ./build/x86_64-unknown-linux-gnu/stage0/bin/rustc -O /tmp/crate/src/main.rs -o binary-updated
-    - name: Display binary size
-      run: |
-        ls -lha binary-*
+    - uses: actions/github-script@v6
+      env:
+        SIZE_REFERENCE: 1
+        SIZE_UPDATED: 10
+      with:
+        script: |
+          let reference = process.env.SIZE_REFERENCE;
+          let updated = process.env.SIZE_UPDATED;
+          let diff = updated - reference;
+          let diff_str = "";
+          if (diff > 0) {
+            diff_str = `+${diff}B`;
+          } else {
+            diff_str = `${diff}B`;
+          }
+
+          if (diff != 0) {
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: `Below is the size of a hello-world Rust program linked with libstd using backtrace.
+                Original binary size: **${reference}B**
+                Updated binary size: **${updated}B**
+                Difference: **${diff_str}**`
+            })
+          }