add ci checks

.github/workflows/build.yml

@@ -0,0 +1,55 @@
+name: Make distributions and test
+
+on:
+  # run workflows on main master and release/** branches
+  push:
+    branches:
+      - main
+      - master
+      - release/**
+  # run workflows on pull requests against the same branches
+  pull_request:
+    branches:
+      - main
+      - master
+      - release/**
+
+# automatically cancel redundant builds
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  makeandtest:
+    name: EL ${{ matrix.version }} (${{ matrix.distro }})
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - distro: eurolinux/centos-7
+            version: latest
+          - distro: rockylinux
+            version: 8
+          - distro: rockylinux
+            version: 9
+    runs-on: ubuntu-latest
+    container: ${{ matrix.distro }}:${{ matrix.version }}
+    steps:
+      - name: Get source code
+        uses: actions/checkout@v3
+
+      - name: Install dependencies
+        run: |
+            yum -y install cpio
+
+      - name: Remove apparmor restriction on unprivileged user namespace
+        run: sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
+
+      - name: Make and test distributions
+        run: |
+            set -ex; \
+            for DIST in default osg egi; do \
+                rm -rf dist; \
+                ./makedist $DIST; \
+                ./cvmfsexec atlas.cern.ch -- ls /cvmfs/atlas.cern.ch; \
+            done

makedist

@@ -185,6 +185,10 @@ fi
 echo "Making $SINGMSG$DISTTYPE distribution for $MACHTYPE"
 
 getcoprurl() {
+    if [ ! -f /usr/bin/yumdownloader ]; then
+        echo "yumdownloader not found, skipping trying to get $1 from copr" >&2
+        return
+    fi
     typeset TMPF=$(mktemp)
     typeset REPONAME=makedist-$1
     cat >$TMPF <<!EOF!
@@ -285,7 +289,7 @@ if $INCLUDEHELPER; then
     fi
     URLS="$URLS $BASEURL/$HELPER"
     if [ "$EL" -lt 8 ]; then
-        EPELURL="https://download.fedoraproject.org/pub/epel/$EL/$ARCH/Packages"
+        EPELURL="https://archives.fedoraproject.org/pub/archive/epel/$EL/$ARCH/Packages"
     else
         EPELURL="https://download.fedoraproject.org/pub/epel/$EL/Everything/$ARCH/Packages"
     fi