Add CI workflows for DEB, RPM, and AppImage builds

- Added `build-deb-packages.yml` to automate the creation of DEB
  packages using `debuild` for all supported Ubuntu and Debian versions.

- Added `build-rpm-packages.yml` to automate the creation of RPM
  packages using `rpmbuild` for all supported Fedora and AlmaLinux
  versions.

- Added `build-appimage.yml` to build an AppImage on CentOS 7, ensuring
  compatibility with systems using `glibc <= 2.17`.

Each workflow includes automated tests and artifact uploads, improving
the packaging and distribution process across multiple Linux
distributions.

.github/workflows/build-appimage.yml

@@ -0,0 +1,102 @@
+name: Build and Test AppImage
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Determine Version
+        id: version
+        run: |
+          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          TAGGED_COMMIT=$(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: Install Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y python3 python3-pip
+          pip3 install appimage-builder
+
+      - name: Verify Installation
+        run: |
+          which appimage-builder
+          appimage-builder --version
+
+      - name: Build AppImage
+        run: |
+          docker run --rm -v $(pwd):/workspace -w /workspace centos:7 /bin/bash -c "
+            set -eux
+
+            # Update repository URLs to use the correct vault since CentOS 7.9.2009 has reached EOL
+            echo 'Updating repository URLs...'
+            sed -i 's|^mirrorlist=|#mirrorlist=|g' /etc/yum.repos.d/CentOS-*.repo
+            sed -i 's|^#baseurl=http://mirror.centos.org/centos/\$releasever|baseurl=http://vault.centos.org/7.9.2009/os/x86_64|g' /etc/yum.repos.d/CentOS-*.repo
+            
+            yum clean all && yum makecache
+            
+            # Install EPEL repository first
+            echo 'Installing epel-release...'
+            yum install -y epel-release
+
+            # Install all required packages
+            echo 'Installing dependencies...'
+            yum install -y gcc make automake autoconf gtk3-devel \
+                gettext-devel libtool fuse fuse-libs patchelf wget
+
+            # Build the application
+            echo 'Building the application...'
+            ./autogen.sh && ./configure && make
+
+            # Prepare AppDir and copy necessary files
+            echo 'Preparing AppDir...'
+            mkdir -p AppDir/usr/bin AppDir/usr/share/icons/hicolor/scalable/apps AppDir/usr/share/applications
+
+            # Install the application into AppDir
+            echo 'Installing the application...'
+            make install DESTDIR=$(pwd)/AppDir
+
+            # Manually copy files to their destinations within AppDir
+            cp src/xnec2c AppDir/usr/bin/xnec2c
+            cp resources/xnec2c.svg AppDir/usr/share/icons/hicolor/scalable/apps/xnec2c.svg
+            cp files/xnec2c.desktop AppDir/usr/share/applications/xnec2c.desktop
+          "
+
+      - name: Generate AppImage with appimage-builder
+        run: |
+          appimage-builder --recipe appimage-builder.yml
+
+      - name: Test AppImage
+        run: |
+          chmod +x xnec2c-${VERSION}${DIST}.AppImage
+          ./xnec2c-${VERSION}${DIST}.AppImage -h
+
+      - name: Upload AppImage
+        uses: actions/upload-artifact@v2
+        with:
+          name: xnec2c-appimage
+          path: xnec2c-${VERSION}${DIST}.AppImage

.github/workflows/build-deb-packages.yml

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+name: Build DEB Packages
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: 
+          - ubuntu-24.04
+          - ubuntu-22.04
+          - ubuntu-20.04
+          - ubuntu-18.04
+          - debian-11
+          - debian-10
+          - debian-9
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Fetch full Git history and tags
+
+      - name: Set up the build environment
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential autoconf automake libtool \
+              libgtk-3-dev libglib2.0-dev gettext desktop-file-utils devscripts fakeroot lintian autopoint dh-make dh-autoreconf
+
+      - name: Determine version and dist
+        id: version
+        run: |
+          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "0.0.0")
+          TAGGED_COMMIT=$(git describe --tags --exact-match 2>/dev/null || echo "notag")
+          
+          if [ "$TAGGED_COMMIT" = "notag" ]; then
+            VERSION="${LATEST_TAG}+"
+            DIST="-git"
+          else
+            VERSION=$LATEST_TAG
+            DIST=""
+          fi
+
+          # Remove the 'v' prefix and ensure the version starts with a digit
+          VERSION=$(echo $VERSION | sed 's/^v//')
+          VERSION=$(echo $VERSION | sed 's/[+]//g') # Replace '+' with '.'
+
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "DIST=$DIST" >> $GITHUB_ENV
+
+      - name: Generate Debian Packaging Files
+        run: |
+          rm -rf ./debian
+          dh_make --createorig -y --single --native --packagename xnec2c_$VERSION
+          echo -e '#!/usr/bin/make -f\n%:\n\tdh $@' > debian/rules
+          chmod +x debian/rules
+          echo "9" > debian/compat
+          echo "Source: xnec2c" > debian/control
+          echo "Section: utils" >> debian/control
+          echo "Priority: optional" >> debian/control
+          echo "Maintainer: Your Name <you@example.com>" >> debian/control
+          echo "Build-Depends: debhelper (>= 9), autotools-dev, automake, autoconf, libtool, libgtk-3-dev, libglib2.0-dev, gettext, desktop-file-utils" >> debian/control
+          echo "Standards-Version: 3.9.6" >> debian/control
+          echo "Homepage: https://www.example.com" >> debian/control
+          echo "" >> debian/control
+          echo "Package: xnec2c" >> debian/control
+          echo "Architecture: any" >> debian/control
+          echo "Depends: \${shlibs:Depends}, \${misc:Depends}" >> debian/control
+          echo "Description: A multi-threaded EM tool to model antenna near- and far-field radiation patterns." >> debian/control
+          echo " Xnec2c is a high-performance multi-threaded electromagnetic simulation" >> debian/control
+          echo " package to model antenna near- and far-field radiation patterns for" >> debian/control
+          echo " Linux and UNIX operating systems." >> debian/control
+
+      - name: Generate Debian Changelog from Git Log
+        run: |
+          VERSION=${{ steps.version.outputs.VERSION }}${{ steps.version.outputs.DIST }}
+          PACKAGE_NAME="xnec2c"
+          DISTRIBUTION="unstable"
+          MAINTAINER="Your Name <you@example.com>"
+
+          echo "$PACKAGE_NAME ($VERSION) $DISTRIBUTION; urgency=low" > debian/changelog
+          echo "" >> debian/changelog
+          git log --pretty=format:"  * %s" >> debian/changelog
+          echo "" >> debian/changelog
+          echo " -- $MAINTAINER  $(date -R)" >> debian/changelog
+
+      - name: Verify Debian Directory
+        run: |
+          if [ ! -f "debian/rules" ]; then
+            echo "Error: debian/rules file not found!"
+            exit 1
+          fi
+
+      - name: Build the DEB package using debuild
+        run: |
+          ./autogen.sh
+          ./configure
+          make
+          debuild -us -uc -b
+
+      - name: Test DEB package
+        run: |
+          dpkg -i ../xnec2c_*.deb || true
+          xnec2c -h
+
+      - name: Upload the DEB package
+        uses: actions/upload-artifact@v2
+        with:
+          name: xnec2c-${{ matrix.os }}.deb
+          path: ../xnec2c_*.deb

.github/workflows/build-rpm-packages.yml

@@ -0,0 +1,99 @@
+name: Build RPM Package
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Determine Version
+        id: version
+        run: |
+          # Get the most recent tag
+          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          
+          # Check if the latest commit is tagged
+          TAGGED_COMMIT=$(git describe --tags --exact-match 2>/dev/null || echo "notag")
+          
+          if [ "$TAGGED_COMMIT" = "notag" ]; then
+            VERSION="${LATEST_TAG}+"
+            DIST="-git"
+          else
+            VERSION=$LATEST_TAG
+            DIST=""
+          fi
+
+          echo "LATEST_TAG=$LATEST_TAG" >> $GITHUB_ENV
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "DIST=$DIST" >> $GITHUB_ENV
+
+      - name: Build RPM
+        run: |
+          docker run --rm -v $(pwd):/workspace -w /workspace almalinux:9 /bin/bash -c "
+            set -x
+
+            # Install dependencies
+            dnf install -y epel-release
+            dnf install -y gcc make automake autoconf gtk3-devel gettext-devel libtool \
+                rpm-build rpmdevtools git desktop-file-utils intltool
+
+            # Prepare the RPM build environment
+            rpmdev-setuptree
+
+            ./autogen.sh
+            ./configure
+            make xnec2c.spec
+            make dist
+
+            # Copy the spec file to the SPECS directory
+            cp xnec2c.spec /root/rpmbuild/SPECS/
+
+            find . /workspace
+            pwd
+            ls -ltr
+
+            # Create a properly versioned tarball
+            TAR_FILE=$(ls /workspace/xnec2c-*.tar.gz)
+            mkdir -p /root/rpmbuild/SOURCES/xnec2c-${VERSION}
+            tar -xzf $TAR_FILE --strip-components=1 -C /root/rpmbuild/SOURCES/xnec2c-${VERSION}
+            tar -czf /root/rpmbuild/SOURCES/xnec2c-${VERSION}.tar.gz -C /root/rpmbuild/SOURCES xnec2c-${VERSION}
+
+            # Build the RPM
+            rpmbuild -ba --define \"_version ${VERSION}\" --define \"_dist ${DIST}\" \
+                --define \"_topdir /root/rpmbuild\" /root/rpmbuild/SPECS/xnec2c.spec
+
+            # Check the RPM files
+            ls -l /root/rpmbuild/RPMS/x86_64
+          "
+
+      - name: Install and Test RPM
+        run: |
+          docker run --rm -v $(pwd):/workspace -w /workspace almalinux:9 /bin/bash -c "
+            # Install the RPM package
+            dnf install -y /root/rpmbuild/RPMS/x86_64/xnec2c-*.rpm
+
+            # Run the test to verify the package
+            xnec2c -h
+          "
+
+      - name: Upload RPM
+        uses: actions/upload-artifact@v2
+        with:
+          name: xnec2c-rpm
+          path: /root/rpmbuild/RPMS/x86_64/xnec2c-*.rpm

appimage-builder.yml

@@ -0,0 +1,27 @@
+version: 1
+
+AppDir:
+  path: ./AppDir
+  app_info:
+    id: xnec2c
+    name: xnec2c
+    icon: usr/share/icons/hicolor/scalable/apps/xnec2c.svg
+    exec: usr/bin/xnec2c
+    exec_args: "$@"
+    version: "${VERSION}${DIST}"
+
+  apt:
+    arch: amd64
+    sources:
+      - sourceline: 'deb [arch=amd64] http://vault.centos.org/7.9.2009/os/ x86_64 main'
+    include: 
+      - glibc
+      - libgtk-3-0
+      - libglib2.0-0
+      - fuse
+      - other-dependencies
+
+AppImage:
+  arch: x86_64
+  update-information: None
+  sign-key: None