fix: update ci.yml to use environment variables for REL_BINARIES_DIR …

…and LIBIMAGEFLOW_STATIC

This commit refactors the CI workflow by replacing direct variable references with environment variable syntax in the ci.yml file. This change ensures better compatibility and clarity when checking for the existence of the static library and retrieving GLIBC version requirements.

.github/workflows/ci.yml

@@ -295,20 +295,20 @@ jobs:
         if: matrix.target == 'x86_64-unknown-linux-gnu' || matrix.target == 'aarch64-unknown-linux-gnu'
         run: |
           # list all files in the target directory
-          ls -l ${REL_BINARIES_DIR}
+          ls -l "${{ env.REL_BINARIES_DIR }}"
 
           # if libimageflow.so does not exist, fail
-          if [[ ! -f ${REL_BINARIES_DIR}${env.LIBIMAGEFLOW_STATIC} ]]; then
-            echo "Error: ${REL_BINARIES_DIR}${env.LIBIMAGEFLOW_STATIC} does not exist"
+          if [[ ! -f "${{ env.REL_BINARIES_DIR }}${{ env.LIBIMAGEFLOW_STATIC }}" ]]; then
+            echo "Error: ${{ env.REL_BINARIES_DIR }}${{ env.LIBIMAGEFLOW_STATIC }} does not exist"
             exit 1
           fi
 
           # Use objdump to find all GLIBC version requirements
           echo "GLIBC version requirements:"
-          objdump -T ${REL_BINARIES_DIR}${env.LIBIMAGEFLOW_STATIC} | grep GLIBC_ | sed 's/.*GLIBC_\([0-9.]*\).*/\1/g' | sort -Vu
+          objdump -T "${{ env.REL_BINARIES_DIR }}${{ env.LIBIMAGEFLOW_STATIC }}" | grep GLIBC_ | sed 's/.*GLIBC_\([0-9.]*\).*/\1/g' | sort -Vu
 
           # Find the highest GLIBC version required
-          HIGHEST_GLIBC=$(objdump -T ${REL_BINARIES_DIR}${env.LIBIMAGEFLOW_STATIC} | grep GLIBC_ | sed 's/.*GLIBC_\([0-9.]*\).*/\1/g' | sort -V | tail -n1)
+          HIGHEST_GLIBC=$(objdump -T "${{ env.REL_BINARIES_DIR }}${{ env.LIBIMAGEFLOW_STATIC }}" | grep GLIBC_ | sed 's/.*GLIBC_\([0-9.]*\).*/\1/g' | sort -V | tail -n1)
           echo "Highest GLIBC version required: $HIGHEST_GLIBC"
 
           # Fail if version is above 2.17 and this is not a skipped build