use diffscope to compare stage2 builds

Author: biabbas

.github/workflows/repro_check.yml

@@ -4,7 +4,6 @@ on:
   push:
     branches:
       - master
-      - reproducible
   pull_request:
     branches:
       - master
@@ -40,11 +39,11 @@ jobs:
           cd ../buildA
           SOURCE_DIR=$(dirname $(find . -maxdepth 2  -name x.py))
           $SOURCE_DIR/configure --set rust.channel=nightly
-          $SOURCE_DIR/x.py build --stage 1 -j$(($(nproc)*2/3))
+          $SOURCE_DIR/x.py build --stage 2 -j$(($(nproc)*2/3))
           rm -rf $SOURCE_DIR
-          STAGE1_DIR=`find build -name stage1`
+          STAGE1_DIR=`find build -name stage2`
           cp -r "$STAGE1_DIR" .
-          echo "Contents stage 1 dir : `ls stage1`"
+          echo "Contents stage 2 dir : `ls stage2`"
           rm -rf build
 
       - name: Build and store binaries from source 2
@@ -53,13 +52,17 @@ jobs:
           echo "Repo storage available: `df -h .`"
           SOURCE_DIR=$(dirname $(find . -maxdepth 2  -name x.py))
           $SOURCE_DIR/configure --set rust.channel=nightly
-          $SOURCE_DIR/x.py build --stage 1 -j$(($(nproc)*2/3))
+          $SOURCE_DIR/x.py build --stage 2 -j$(($(nproc)*2/3))
           rm -rf $SOURCE_DIR
-          STAGE1_DIR=`find build -name stage1`
+          STAGE1_DIR=`find build -name stage2`
           cp -r "$STAGE1_DIR" .
-          echo "Contents stage 1 dir : `ls stage1`"
+          echo "Contents stage 2 dir : `ls stage2`"
           rm -rf build
-          cd ..
+
+      - name: Install diffoscope
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y diffoscope
 
       - name: Compare builds using git diff
         run: |
@@ -73,4 +76,27 @@ jobs:
           fi
 
           # Perform a diff between the two builds
-          diff -r buildA/stage1 buildA_extended/stage1 || echo "Differences found!"
+          diffoscope buildA/stage2 buildA_extended/stage2 > diffoscope_output.txt || echo "Differences found!"
+
+      - name: Upload diffoscope output
+        uses: actions/upload-artifact@v4
+        with:
+          name: diffoscope-report
+          path: diffoscope_output.txt
+
+      - name: Archive buildA and buildA_extended
+        run: |
+          tar -czf buildA.tar.gz buildA
+          tar -czf buildA_extended.tar.gz buildA_extended
+
+      - name: Upload buildA artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: buildA
+          path: buildA.tar.gz
+
+      - name: Upload buildA_extended artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: buildA_extended
+          path: buildA_extended.tar.gz