refactor: modernise RPM builder with Python tooling v2

- Migrate from legacy shell-based build system to modern Python tooling
- Update all metadata.yaml files to new schema with per-distro builds
- Standardise build scripts with curl -L, envsubst, and error handling
- Convert nfpm.yaml templates to use environment variable substitution
- Update Dockerfile to accept all package metadata as build arguments
- Modernise Makefile to use new Python build tool commands
- Update CI workflow to use tools/build instead of make

rpms/stalwart-cli/resources/build.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/bash
 
+set -e
+
 # Download the required files
 curl -L -o /app/stalwart-cli.tar.gz https://github.com/stalwartlabs/stalwart/releases/download/v${PACKAGE_VERSION}/stalwart-cli-x86_64-unknown-linux-gnu.tar.gz
 
@@ -9,5 +11,7 @@ tar -xzf /app/stalwart-cli.tar.gz -C /app
 # Make the binary executable
 chmod +x /app/stalwart-cli
 
-# Build the RPM
-nfpm pkg --config /app/resources/nfpm.yaml --target /app/dist --packager rpm
+# Process the nfpm.yaml template with environment variables
+envsubst < /app/resources/nfpm.yaml > /app/nfpm.yaml
+
+nfpm pkg --config /app/nfpm.yaml --target /app/dist --packager rpm

rpms/stalwart-cli/resources/nfpm.yaml

@@ -1,17 +1,17 @@
 # nfpm.yaml
 
-name: stalwart-cli
+name: ${PACKAGE_NAME}
 version: ${PACKAGE_VERSION}
 release: ${PACKAGE_RELEASE}
-arch: amd64
-platform: linux
+arch: ${PACKAGE_ARCH}
+platform: ${PACKAGE_PLATFORM}
 section: default
 priority: extra
-description: "Stalwart CLI - Command line interface for Stalwart Mail Server"
+description: "${PACKAGE_DESCRIPTION}"
 
-maintainer: Stalwart Labs
-homepage: https://stalw.art
-license: AGPL-3.0
+maintainer: ${PACKAGE_MAINTAINER}
+homepage: ${PACKAGE_HOMEPAGE}
+license: ${PACKAGE_LICENSE}
 
 disable_globbing: false