Add RPM and DEB package support to build system

[Copilot]

This PR implements RPM and DEB package creation support for DSC, addressing issue #1200.

Overview

The build system now supports creating RPM and DEB packages for Linux distributions using the -packageType rpm or -packageType deb parameters. This enables easier installation and distribution of DSC on both RPM-based Linux systems (like Fedora, RHEL, SUSE) and Debian-based systems (like Ubuntu, Debian).

Changes

build.ps1

• Added 'rpm' and 'deb' as valid options for the -packageType parameter
• Implemented comprehensive RPM packaging logic that:
  • Validates platform requirements (Linux only)
  • Checks for rpmbuild availability with helpful error messages
  • Creates standard RPM build directory structure (BUILD, RPMS, SOURCES, SPECS, SRPMS)
  • Stages Linux package files from the build output
  • Maps Rust target architectures to RPM architectures (musl/gnu → x86_64/aarch64)
  • Supports 'current' architecture auto-detection using uname -m
  • Processes the spec file template with version and architecture substitution
  • Builds the RPM using rpmbuild
  • Copies the final package to the bin directory
• Implemented comprehensive DEB packaging logic that:
  • Validates platform requirements (Linux only)
  • Checks for dpkg-deb availability with helpful error messages
  • Creates standard Debian package directory structure (DEBIAN, opt/dsc, usr/bin)
  • Stages Linux package files from the build output
  • Maps Rust target architectures to DEB architectures (musl/gnu → amd64/arm64)
  • Supports 'current' architecture auto-detection using uname -m
  • Processes the control file template with version and architecture substitution
  • Builds the DEB using dpkg-deb
  • Moves the final package to the bin directory

packaging/rpm/dsc.spec

• Created new RPM specification file following standard format
• Uses environment variables ($RPM_BUILD_ROOT, $RPM_SOURCE_DIR) instead of macros to ensure compatibility across all RPM-based distributions, not just RedHat/Fedora
• Installs DSC to /opt/dsc with a symlink at /usr/bin/dsc for easy access
• Includes proper metadata: Name, Version, License (MIT), URL, Summary, Description
• Documents initial release in changelog

packaging/deb/control

• Created new Debian control file following standard format
• Includes proper metadata: Package, Version, Section, Priority, Architecture, Maintainer, Homepage, Description
• Installs DSC to /opt/dsc with a symlink at /usr/bin/dsc for easy access (same as RPM)

Usage

# First build the binaries for your target architecture
./build.ps1 -Release -architecture x86_64-unknown-linux-musl

# Then create the RPM package with specific architecture
./build.ps1 -packageType rpm -architecture x86_64-unknown-linux-musl

# Or create the DEB package with specific architecture
./build.ps1 -packageType deb -architecture x86_64-unknown-linux-musl

# Or use 'current' to auto-detect the system architecture
./build.ps1 -packageType rpm -architecture current
./build.ps1 -packageType deb -architecture current

The RPM will be created in the bin/ directory as dsc-<version>-1.<arch>.rpm
The DEB will be created in the bin/ directory as dsc_<version>-1_<arch>.deb

Supported Architectures

RPM:

• x86_64 (via x86_64-unknown-linux-musl or x86_64-unknown-linux-gnu)
• aarch64 (via aarch64-unknown-linux-musl or aarch64-unknown-linux-gnu)
• current (auto-detects and maps to x86_64 or aarch64)

DEB:

• amd64 (via x86_64-unknown-linux-musl or x86_64-unknown-linux-gnu)
• arm64 (via aarch64-unknown-linux-musl or aarch64-unknown-linux-gnu)
• current (auto-detects and maps to amd64 or arm64)

Installation

Users can install the RPM package using:

sudo rpm -i dsc-<version>-1.<arch>.rpm
# Or with package managers
sudo dnf install dsc-<version>-1.<arch>.rpm

Users can install the DEB package using:

sudo dpkg -i dsc_<version>-1_<arch>.deb
# Or with package managers
sudo apt install ./dsc_<version>-1_<arch>.deb

Testing

• PowerShell syntax validation: ✅ Passed
• Parameter validation: ✅ Confirmed 'rpm' and 'deb' are accepted
• CodeQL security scan: ✅ No issues found

This implementation follows the same patterns as the existing tgz packaging, ensuring consistency and maintainability.

Fixes #1200

Original prompt

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This section details on the original issue you should resolve

<issue_title>Create RPM package</issue_title>
<issue_description>### Summary of the new feature / enhancement

Update build.ps1 with new parameter value rpm for the -packageType parameter. Create a RPMSPEC file in the repo under a new rpm folder under packaging folder. Don't assume using RedHat Linux therefore don't use any macros that may not exist.

Proposed technical implementation details (optional)

No response</issue_description>

<agent_instructions>Follow the instructions in the summary of the issue</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes #1200

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[Copilot]

Pull Request Overview

This PR adds RPM package creation support to the build system, enabling DSC distribution on RPM-based Linux systems. The implementation follows the existing tgz packaging pattern and includes proper validation and error handling.

Key Changes:

• Added rpm as a valid package type option with comprehensive build logic
• Created RPM spec file using environment variables for broad distribution compatibility
• Implemented architecture mapping from Rust targets to RPM architectures

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
build.ps1	Added RPM package type validation and complete packaging logic including platform checks, directory structure creation, and rpmbuild integration
packaging/rpm/dsc.spec	New RPM specification file defining package metadata, installation paths, and file listings using environment variables for compatibility

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[SteveL-MSFT]

@copilot do the same changes to support deb packages

[Copilot]

@copilot do the same changes to support deb packages

DEB package support has been added in commit 03a0eb0. The implementation follows the same pattern as RPM packaging:

• Added 'deb' to the packageType parameter
• Created packaging/deb/control file with Debian package metadata
• Implemented build logic that creates DEB packages with dpkg-deb
• Supports amd64 and arm64 architectures
• Installs to /opt/dsc with symlink at /usr/bin/dsc

Usage:

./build.ps1 -packageType deb -architecture x86_64-unknown-linux-musl