Developer Guide

Deploy for development

This project uses pip to manage the package. If you want to work on the project yourself you can create the necessary links via:

$ pip3 install --user -e .

That will install a backlink ~/.local/bin/kas to this project. Now you are able to call it from anywhere.

Docker image build

Just run:

$ docker build -t <image_name> .

When you need a proxy to access the internet, add:

--build-arg http_proxy=<http_proxy> --build-arg https_proxy=<https_proxy> --build-arg ftp_proxy=<ftp_proxy> --build-arg no_proxy=<no_proxy>

to the call.

Community Resources

Project home:

• https://github.com/siemens/kas

Source code:

• https://github.com/siemens/kas.git
• git@github.com:siemens/kas.git

Documentation:

• https://kas.readthedocs.org

Mailing list:

• kas-devel@googlegroups.com
• Subscription:
  • kas-devel+subscribe@googlegroups.com
  • https://groups.google.com/forum/#!forum/kas-devel/join
• Archives
  • https://groups.google.com/forum/#!forum/kas-devel
  • https://www.mail-archive.com/kas-devel@googlegroups.com/

Class reference documentation

kas.kas Module

This module is the main entry point for kas, setup tool for bitbake based projects

kas.kas.create_logger()

Setup the logging environment

kas.kas.interruption()

Ignore SIGINT/SIGTERM in kas, let them be handled by our sub-processes

kas.kas.kas(argv)

The actual main entry point of kas.

kas.kas.kas_get_argparser()

Creates an argparser for kas with all plugins.

kas.kas.main()

The main function that operates as a wrapper around kas.

kas.libkas Module

This module contains the core implementation of kas.

class kas.libkas.LogOutput(live)

Handles the log output of executed applications

log_stderr(line)

This method is called when a line is received over stderr.

log_stdout(line)

This method is called when a line is received over stdout.

kas.libkas.find_program(paths, name)

Find a file within the paths array and returns its path.

kas.libkas.get_build_environ(build_system)

Creates the build environment variables.

kas.libkas.repos_apply_patches(repos)

Applies the patches to the repositories.

kas.libkas.repos_fetch(repos)

Fetches the list of repositories to the kas_work_dir.

kas.libkas.run_cmd(cmd, cwd, env=None, fail=True, liveupdate=True)

Runs a command synchronously.

kas.libkas.run_cmd_async(cmd, cwd, env=None, fail=True, liveupdate=True)

Run a command asynchronously.

kas.libkas.ssh_add_key(env, key)

Adds an ssh key to the ssh-agent

kas.libkas.ssh_cleanup_agent()

Removes the identities and stops the ssh-agent instance

kas.libkas.ssh_no_host_key_check()

Disables ssh host key check

kas.libkas.ssh_setup_agent(envkeys=None)

Starts the ssh-agent

kas.libcmds Module

This module contains common commands used by kas plugins.

class kas.libcmds.CleanupSSHAgent

Removes all the identities and stops the ssh-agent instance.

execute(ctx)

This method executes the command.

class kas.libcmds.Command

An abstract class that defines the interface of a command.

execute(ctx)

This method executes the command.

class kas.libcmds.FinishSetupRepos

Finalizes the repo setup loop

execute(ctx)

TODO refactor protected-access

class kas.libcmds.InitSetupRepos

Prepares setting up repos including the include logic

execute(ctx)

This method executes the command.

class kas.libcmds.Loop(name)

A class that defines a set of commands as a loop.

add(command)

Appends a command to the loop.

execute(ctx)

Executes the loop.

class kas.libcmds.Macro(use_common_setup=True, use_common_cleanup=True)

Contains commands and provides method to run them.

add(command)

Appends commands to the command list.

run(ctx, skip=None)

Runs a command from the command list with respect to the configuration.

class kas.libcmds.ReposApplyPatches

Applies the patches defined in the configuration to the repositories.

execute(ctx)

This method executes the command.

class kas.libcmds.ReposCheckout

Ensures that the right revision of each repo is checked out.

execute(ctx)

This method executes the command.

class kas.libcmds.ReposFetch

Fetches repositories defined in the configuration

execute(ctx)

This method executes the command.

class kas.libcmds.SetupDir

Creates the build directory.

execute(ctx)

This method executes the command.

class kas.libcmds.SetupEnviron

Sets up the kas environment.

execute(ctx)

This method executes the command.

class kas.libcmds.SetupHome

Sets up the home directory of kas.

execute(ctx)

This method executes the command.

class kas.libcmds.SetupReposStep

Single step of the checkout repos loop

execute(ctx)

TODO refactor protected-access

class kas.libcmds.SetupSSHAgent

Sets up the ssh agent configuration.

execute(ctx)

This method executes the command.

class kas.libcmds.WriteBBConfig

Writes bitbake configuration files into the build directory.

execute(ctx)

This method executes the command.

kas.config Module

This module contains the implementation of the kas configuration.

class kas.config.Config(filename, target=None, task=None)

Implements the kas configuration based on config files.

find_missing_repos()

Returns repos that are in config but not on disk

get_bblayers_conf_header()

Returns the bblayers.conf header

get_bitbake_targets()

Returns a list of bitbake targets

get_bitbake_task()

Returns the bitbake task

get_build_system()

Returns the pre-selected build system

get_distro()

Returns the distro

get_environment()

Returns the configured environment variables from the configuration file with possible overwritten values from the environment.

get_local_conf_header()

Returns the local.conf header

get_machine()

Returns the machine

get_multiconfig()

Returns the multiconfig array as bitbake string

get_repos()

Returns the list of repos.

kas.repos Module

This module contains the Repo class.

class kas.repos.GitRepo(name, url, path, refspec, layers, patches, disable_operations)

Provides the git functionality for a Repo.

class kas.repos.MercurialRepo(name, url, path, refspec, layers, patches, disable_operations)

Provides the hg functionality for a Repo.

class kas.repos.Repo(name, url, path, refspec, layers, patches, disable_operations)

Represents a repository in the kas configuration.

static factory(name, repo_config, repo_defaults, repo_fallback_path)

Returns a Repo instance depending on params.

static get_root_path(path, fallback=True)

Checks if path is under version control and returns its root path.

class kas.repos.RepoImpl(name, url, path, refspec, layers, patches, disable_operations)

Provides a generic implementation for a Repo.

apply_patches_async()

Applies patches to a repository asynchronously.

checkout()

Checks out the correct revision of the repo.

fetch_async()

Starts asynchronous repository fetch.

kas.includehandler Module

This module implements how includes of configuration files are handled in kas.

exception kas.includehandler.IncludeException

Class for exceptions that appear in the include mechanism.

class kas.includehandler.IncludeHandler(top_files)

Implements a handler where every configuration file should contain a dictionary as the base type with and ‘includes’ key containing a list of includes.

The includes can be specified in two ways: as a string containing the relative path from the current file or as a dictionary. The dictionary should have a ‘file’ key containing the relative path to the include file and optionally a ‘repo’ key containing the key of the repository. If the ‘repo’ key is missing the value of the ‘file’ key, it is treated the same as if just a string was defined, meaning the path is relative to the current config file. Otherwise it is interpreted relative to the repository path.

The includes are read and merged from the deepest level upwards.

get_config(repos=None)

Parameters:

repos – A dictionary that maps repo names to directory paths

Returns:

(config, repos)

config – A dictionary containing the configuration repos – A list of missing repo names that are needed to create a complete configuration

exception kas.includehandler.LoadConfigException(message, filename)

Class for exceptions that appear while loading a configuration file.

kas.includehandler.load_config(filename)

Load the configuration file and test if version is supported.

kas.plugins Module

This module contains and manages kas plugins

kas.plugins.all()

Get a list of all loaded kas plugin classes

kas.plugins.get(name)

Lookup a kas plugin class by name

kas.plugins.load()

Import all kas plugins

kas.plugins.register_plugins(mod)

Register all kas plugins found in a module