ci: add DEB package generation for Debian/Ubuntu

- Add cargo-deb metadata to Cargo.toml with package configuration
- Update release workflow to build .deb packages for amd64 and arm64
- DEB packages are automatically uploaded to GitHub releases

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: bordeux

.github/workflows/release.yml

@@ -74,6 +74,7 @@ jobs:
             os: ubuntu-latest
             artifact_name: tmpltool
             asset_name: tmpltool-linux-x86_64
+            deb_arch: amd64
 
           - target: x86_64-unknown-linux-musl
             os: ubuntu-latest
@@ -84,6 +85,7 @@ jobs:
             os: ubuntu-latest
             artifact_name: tmpltool
             asset_name: tmpltool-linux-aarch64
+            deb_arch: arm64
 
           - target: x86_64-apple-darwin
             os: macos-latest
@@ -165,13 +167,36 @@ jobs:
           cd target/${{ matrix.target }}/release
           Compress-Archive -Path ${{ matrix.artifact_name }} -DestinationPath ../../../${{ matrix.asset_name }}.zip
 
+      - name: Install cargo-deb (Linux DEB)
+        if: matrix.deb_arch != ''
+        run: cargo install cargo-deb
+
+      - name: Build DEB package (x86_64)
+        if: matrix.deb_arch == 'amd64'
+        run: |
+          cargo deb --no-build --target ${{ matrix.target }}
+          cp target/${{ matrix.target }}/debian/*.deb tmpltool_${{ needs.semantic-release.outputs.new_release_version }}_${{ matrix.deb_arch }}.deb
+
+      - name: Build DEB package (aarch64)
+        if: matrix.deb_arch == 'arm64'
+        run: |
+          cargo deb --no-build --target ${{ matrix.target }}
+          cp target/${{ matrix.target }}/debian/*.deb tmpltool_${{ needs.semantic-release.outputs.new_release_version }}_${{ matrix.deb_arch }}.deb
+
       - name: Upload artifact (Linux/macOS)
         if: matrix.os != 'windows-latest'
         uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.asset_name }}
           path: ${{ matrix.asset_name }}.tar.gz
 
+      - name: Upload DEB artifact
+        if: matrix.deb_arch != ''
+        uses: actions/upload-artifact@v4
+        with:
+          name: tmpltool-deb-${{ matrix.deb_arch }}
+          path: tmpltool_${{ needs.semantic-release.outputs.new_release_version }}_${{ matrix.deb_arch }}.deb
+
       - name: Upload artifact (Windows)
         if: matrix.os == 'windows-latest'
         uses: actions/upload-artifact@v4

Cargo.toml

@@ -39,3 +39,20 @@ urlencoding = "2"
 
 [dev-dependencies]
 tempfile = "3.24.0"
+
+[package.metadata.deb]
+maintainer = "Chris Bednarczyk <tmpltool@bordeux.net>"
+copyright = "2026, Chris Bednarczyk"
+license-file = ["LICENSE", "0"]
+extended-description = """\
+A fast and simple command-line template rendering tool using MiniJinja \
+(Jinja2-compatible) templates with environment variables. Features include \
+hash generation (MD5, SHA1, SHA256, SHA512), filesystem operations, \
+data parsing (JSON, YAML, TOML), validation functions, and more."""
+section = "utils"
+priority = "optional"
+assets = [
+    ["target/release/tmpltool", "usr/bin/", "755"],
+    ["README.md", "usr/share/doc/tmpltool/README.md", "644"],
+    ["LICENSE", "usr/share/doc/tmpltool/LICENSE", "644"],
+]

TODO.md

@@ -291,7 +291,7 @@ Before implementing new functions/filters, note that MiniJinja already provides
 
 - [ ] Publish to crates.io for `cargo install tmpltool`
 - [ ] Create Homebrew formula for macOS
-- [ ] Create APT/DEB package for Debian/Ubuntu
+- [x] Create APT/DEB package for Debian/Ubuntu
 - [ ] Create RPM package for Fedora/RHEL
 - [ ] Create Chocolatey package for Windows
 - [ ] Create Nix package