# Edk2 Continuous Integration

## Basic Status

| Package             | Windows VS2019 (IA32/X64)| Ubuntu GCC (IA32/X64/ARM/AARCH64) | Known Issues |
| :----               | :-----                   | :----                             | :---         |
| ArmPkg              |
| ArmPlatformPkg      |
| ArmVirtPkg          |
| CryptoPkg           | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode
| DynamicTablesPkg    |
| EmbeddedPkg         |
| EmulatorPkg         |
| FatPkg              | :heavy_check_mark: | :heavy_check_mark: |
| FmpDevicePkg        | :heavy_check_mark: | :heavy_check_mark: |
| IntelFsp2Pkg        |
| IntelFsp2WrapperPkg |
| MdeModulePkg        | :heavy_check_mark: | :heavy_check_mark: | DxeIpl dependency on ArmPkg, Depends on StandaloneMmPkg, Spell checking in audit mode
| MdePkg              | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode
| NetworkPkg          | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode
| OvmfPkg             |
| PcAtChipsetPkg      | :heavy_check_mark: | :heavy_check_mark: |
| SecurityPkg         | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode
| ShellPkg            | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode, 3 modules are not being built by DSC
| SignedCapsulePkg    |
| SourceLevelDebugPkg |
| StandaloneMmPkg     |
| UefiCpuPkg          | :heavy_check_mark: | :heavy_check_mark: | Spell checking in audit mode, 2 binary modules not being built by DSC
| UefiPayloadPkg      |

For more detailed status look at the test results of the latest CI run on the
repo readme.

## Background

This Continuous integration and testing infrastructure leverages the TianoCore EDKII Tools PIP modules:
[library](https://pypi.org/project/edk2-pytool-library/) and
[extensions](https://pypi.org/project/edk2-pytool-extensions/) (with repos
located [here](https://github.com/tianocore/edk2-pytool-library) and
[here](https://github.com/tianocore/edk2-pytool-extensions)).

The primary execution flows can be found in the
`.azurepipelines/Windows-VS2019.yml` and `.azurepipelines/Ubuntu-GCC5.yml`
files. These YAML files are consumed by the Azure Dev Ops Build Pipeline and
dictate what server resources should be used, how they should be configured, and
what processes should be run on them. An overview of this schema can be found
[here](https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema?view=azure-devops&tabs=schema).

Inspection of these files reveals the EDKII Tools commands that make up the
primary processes for the CI build: 'stuart_setup', 'stuart_update', and
'stuart_ci_build'. These commands come from the EDKII Tools PIP modules and are
configured as described below. More documentation on the tools can be
found [here](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/using.md)
and [here](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/features/feature_invocables.md).

## Configuration

Configuration of the CI process consists of (in order of precedence):

* command-line arguments passed in via the Pipeline YAML
* a per-package configuration file (e.g. `<package-name>.ci.yaml`) that is
  detected by the CI system in EDKII Tools.
* a global configuration Python module (e.g. `CISetting.py`) passed in via the
  command-line

The global configuration file is described in
[this readme](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/usability/using_settings_manager.md)
from the EDKII Tools documentation. This configuration is written as a Python
module so that decisions can be made dynamically based on command line
parameters and codebase state.

The per-package configuration file can override most settings in the global
configuration file, but is not dynamic. This file can be used to skip or
customize tests that may be incompatible with a specific package.  Each test generally requires
per package configuration which comes from this file.

## Running CI locally

The EDKII Tools environment (and by extension the ci) is designed to support
easily and consistantly running locally and in a cloud ci environment.  To do
that a few steps should be followed.  Details of EDKII Tools can be found in the
[docs folder here](https://github.com/tianocore/edk2-pytool-extensions/tree/master/docs)

### Prerequisets

1. A supported toolchain (others might work but this is what is tested and validated)
   * Windows 10:
     * VS 2017 or VS 2019
     * Windows SDK (for rc)
     * Windows WDK (for capsules)
   * Ubuntu 16.04
     * GCC5
   * Easy to add more but this is the current state
2. Python 3.7.x or newer on path
3. git on path
4. Recommended to setup and activate a python virtual environment
5. Install the requirements `pip install --upgrade pip-requirements.txt`

### Running CI

1. clone your edk2 repo
2. Activate your python virtual environment in cmd window
3. Get code dependencies (done only when submodules change)
   * `stuart_setup -c .pytool/CISettings.py TOOL_CHAIN_TAG=<your tag here>`
4. Update other dependencies (done more often)
   * `stuart_update -c .pytool/CISettings.py TOOL_CHAIN_TAG=<your tag here>`
5. Run CI build (--help will give you options)
   * `stuart_ci_build -c .pytool/CISettings.py TOOL_CHAIN_TAG=<your tag here>`
   * -p <pkg1,pkg2,pkg3> : To build only certain packages use a CSV list
   * -a <arch1,arch2,arch3>: To run only certain architectures use a CSV list
   * -t <target1,target2>: To run only tests related to certain targets use a
     CSV list
   * By default all tests are opted in.  Then given a package.ci.yaml file those
     tests can be configured for a package. Finally setting the check to the
     value `skip` will skip that plugin.  Examples:
     * `CompilerPlugin=skip` skip the build test
     * `GuidCheck=skip` skip the Guid check
     * `SpellCheck=skip` skip the spell checker
     * etc
6. Detailed reports and logs per package are captured in the `Build` directory

## Current PyTool Test Capabilities

All CI tests are instances of EDKII Tools plugins. Documentation on the plugin
system can be found [here](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/usability/using_plugin_manager.md)
and [here](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/features/feature_plugin_manager.md).
Upon invocation, each plugin will be passed the path to the current package
under test and a dictionary containing its targeted configuration, as assembled
from the command line, per-package configuration, and global configuration.

Note: CI plugins are considered unique from build plugins and helper plugins,
even though some CI plugins may execute steps of a build.

In the example, these plugins live alongside the code under test (in the
`.pytool/Plugin` directory), but may be moved to the 'edk2-test' repo if that
location makes more sense for the community.

### Module Inclusion Test - DscCompleteCheck

This test scans all available modules (via INF files) and compares them to the
package-level DSC file for the package each module is contained within. The test
considers it an error if any module does not appear in the `Components` section
of at least one package-level DSC (indicating that it would not be built if the
package were built).

### Code Compilation Test - CompilerPlugin

Once the Module Inclusion Test has verified that all modules would be built if
all package-level DSCs were built, the Code Compilation Test simply runs through
and builds every package-level DSC on every toolchain and for every architecture
that is supported. Any module that fails to build is considered an error.

### GUID Uniqueness Test - GuidCheck

This test works on the collection of all packages rather than an individual
package. It looks at all FILE_GUIDs and GUIDs declared in DEC files and ensures
that they are unique for the codebase. This prevents, for example, accidental
duplication of GUIDs when using an existing INF as a template for a new module.

### Cross-Package Dependency Test - DependencyCheck

This test compares the list of all packages used in INFs files for a given
package against a list of "allowed dependencies" in plugin configuration for
that package. Any module that depends on a disallowed package will cause a test
failure.

### Library Declaration Test - LibraryClassCheck

This test scans at all library header files found in the `Library` folders in
all of the package's declared include directories and ensures that all files
have a matching LibraryClass declaration in the DEC file for the package. Any
missing declarations will cause a failure.

### Invalid Character Test - CharEncodingCheck

This test scans all files in a package to make sure that there are no invalid
Unicode characters that may cause build errors in some character
sets/localizations.

### Spell Checking - cspell

This test runs a spell checker on all files within the package.  This is done
using the NodeJs cspell tool.  For details check `.pytool/Plugin/SpellCheck`.
For this plugin to run during ci you must install nodejs and cspell and have
both available to the command line when running your CI.

Install

* Install nodejs from https://nodejs.org/en/
* Install cspell
  1. Open cmd prompt with access to node and npm
  2. Run `npm install -g cspell`

  More cspell info: https://github.com/streetsidesoftware/cspell

## PyTool Scopes

Scopes are how the PyTool ext_dep, path_env, and plugins are activated.  Meaning
that if an invocable process has a scope active then those ext_dep and path_env
will be active. To allow easy integration of PyTools capabilities there are a
few standard scopes.

| Scope      | Invocable                                            | Description    |
| :----      | :-----                                               | :----          |
| global     | edk2_invocable++ - should be base_abstract_invocable | Running an invocables |
| global-win | edk2_invocable++                                     | Running on Microsoft Windows |
| global-nix | edk2_invocable++                                     | Running on Linux based OS    |
| edk2-build |                                                      | This indicates that an invocable is building EDK2 based UEFI code |
| cibuild    | set in .pytool/CISettings.py                         | Suggested target for edk2 continuous integration builds.  Tools used for CiBuilds can use this scope.  Example: asl compiler |

## Future investments

* PatchCheck tests as plugins
* MacOS/xcode support
* Clang/LLVM support
* Visual Studio AARCH64 and ARM support
* BaseTools C tools CI/PR and binary release process
* BaseTools Python tools CI/PR process
* Host based unit testing
* Extensible private/closed source platform reporting
* Platform builds, validation
* UEFI SCTs
* Other automation