CI: introduce support for Oracle Linux 8

Author: Lukas Hutak

.github/workflows/main.yml

@@ -16,11 +16,11 @@ jobs:
           - 'debian:bullseye'
           - 'centos:7'
           - 'quay.io/centos/centos:stream8'
+          - 'oraclelinux:8'
 
     name: Build on ${{ matrix.image }}
     container: ${{ matrix.image }}
     steps:
-    - uses: actions/checkout@v2
 
     # Dependencies ---------------------------------------------------------------------------
     - name: Install dependencies (Ubuntu/Debian)
@@ -30,12 +30,22 @@ jobs:
         apt-get -y install git gcc g++ cmake make libxml2-dev liblz4-dev libzstd-dev
       env:
         DEBIAN_FRONTEND: noninteractive
-    - name: Install dependencies (CentOS)
+    - name: Enable EPEL (CentOS)
       if: contains(matrix.image, 'centos')
       run: |
         yum -y install epel-release
+    - name: Enable EPEL (Oracle Linxu)
+      if: contains(matrix.image, 'oraclelinux')
+      run: |
+        dnf -y install oracle-epel-release-el8
+    - name: Install dependencies (CentOS, Oracle Linux)
+      if: contains(matrix.image, 'centos') || contains(matrix.image, 'oraclelinux')
+      run: |
         yum -y install git gcc gcc-c++ cmake make libxml2-devel lz4-devel libzstd-devel
 
+    # Checkout repository --------------------------------------------------------------------
+    - uses: actions/checkout@v2
+
     # Build ----------------------------------------------------------------------------------
     # Note: Unit tests are disabled on CentOS7 due to outdated GCC version
     - name: Build the project

.github/workflows/package.yml

@@ -61,12 +61,12 @@ jobs:
         image:
           - 'centos:7'
           - 'quay.io/centos/centos:stream8'
+          - 'oraclelinux:8'
 
     name: Build RPMs on ${{ matrix.image }}
     container: ${{ matrix.image }}
 
     steps:
-    - uses: actions/checkout@v2
     - name: Define variables
       uses: actions/github-script@v5
       with:
@@ -78,12 +78,22 @@ jobs:
           core.exportVariable('ZIP_FILE', zip);
 
     # Dependencies ---------------------------------------------------------------------------
-    - name: Install dependencies (CentOS)
+    - name: Enable EPEL (CentOS)
       if: contains(matrix.image, 'centos')
       run: |
         yum -y install epel-release
+    - name: Enable EPEL (Oracle Linxu)
+      if: contains(matrix.image, 'oraclelinux')
+      run: |
+        dnf -y install oracle-epel-release-el8
+    - name: Install dependencies (CentOS, Oracle Linux)
+      if: contains(matrix.image, 'centos') || contains(matrix.image, 'oraclelinux')
+      run: |
         yum -y install git gcc gcc-c++ cmake make libxml2-devel lz4-devel libzstd-devel rpm-build
 
+    # Checkout repository --------------------------------------------------------------------
+    - uses: actions/checkout@v2
+
     # Build ----------------------------------------------------------------------------------
     - name: Build RPM packages
       run: |