github: fix build-appimage

Author: Eric Wheeler

.github/workflows/build-appimage.yml

@@ -15,9 +15,37 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Determine version and dist
+        id: version
+        run: |
+          # Get the most recent tag, and check if the latest commit is tagged
+          LATEST_TAG=$(git describe --tags --abbrev=0)
+          TAGGED_COMMIT=$(git describe --tags --exact-match 2>/dev/null || echo "notag")
+          
+          if [ "$TAGGED_COMMIT" = "notag" ]; then
+            VERSION="${LATEST_TAG}+"
+            DIST="-git"
+          else
+            VERSION=$LATEST_TAG
+            DIST=""
+          fi
+
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "DIST=$DIST" >> $GITHUB_ENV
+
       - name: Set up CentOS 7 Docker
         run: |
           docker run --rm -v $(pwd):/workspace -w /workspace centos:7 /bin/bash -c "
+            # Update repository URLs to use the vault since CentOS 7 has reached EOL
+            sed -i 's|^mirrorlist=|#mirrorlist=|g' /etc/yum.repos.d/CentOS-*.repo
+            sed -i 's|^#baseurl=http://mirror.centos.org/centos/\$releasever|baseurl=http://vault.centos.org/7.9.2009|g' /etc/yum.repos.d/CentOS-*.repo
+
+            yum clean all
+            yum makecache
+
             yum install -y epel-release
             yum groupinstall -y 'Development Tools'
             yum install -y gtk3-devel glib2-devel gettext-devel desktop-file-utils \