CI: add cache to linux_bin_build.yml

.github/workflows/linux_bin_build.yml

@@ -9,7 +9,12 @@ on:
   pull_request:
 
 env:
-  PERL_MOD_DIR: /home/runner/perl5/lib/perl5
+  PERL5LIB: /home/runner/perl5/lib/perl5
+  PERL_LOCAL_LIB_ROOT: /home/runner/perl5/
+  PERL_MB_OPT: --install_base /home/runner/perl5/
+  PERL_MM_OPT: INSTALL_BASE=/home/runner/perl5/
+  AUTOMATED_TESTING: 1
+
 
 jobs:
   perl:
@@ -32,6 +37,21 @@ jobs:
       - name: perl -V
         run: perl -V
 
+      - name: Prepare for CPAN cache
+        run: |
+          perl -V > perlversion.txt
+          echo '20220320a' >> perlversion.txt
+          dir perlversion.txt
+
+      - name: Cache CPAN modules
+        uses: actions/cache@v4
+        with:
+          path: /home/runner/perl5/
+          key: ${{ runner.os }}-build-${{ hashFiles('perlversion.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ hashFiles('perlversion.txt') }}
+
+
       - name: Install Dependencies
         run: |
           sudo apt-get install -y zlib1g-dev