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West Release Notes


The main user-visible feature in west 0.7 is the Manifest Imports feature. This allows users to load west manifest data from multiple different files, resolving the results into a single logical manifest.

Additional user-visible changes:

  • The idea of a “west installation” has been renamed to “west workspace” in this documentation and in the west API documentation. The new term seems to be easier for most people to work with than the old one.

  • West manifests now support a schema version.

  • The “west config” command can now be run outside of a workspace, e.g. to run west config --global section.key value to set a configuration option’s value globally.

  • There is a new west topdir command, which prints the root directory of the current west workspace.

  • The west -vv init command now prints the git operations being performed, and their results.

  • The restriction that no project can be named “manifest” is now enforced; the name “manifest” is reserved for the manifest repository, and is usable as such in commands like west list manifest, instead of west list path-to-manifest-repository being the only way to say that

  • It’s no longer an error if there is no project named “zephyr”. This is part of an effort to make west generally usable for non-Zephyr use cases.

  • Various bug fixes.

The developer-visible changes to the West APIs are:

  • and west.cmake: deprecated; this is Zephyr-specific functionality and should never have been part of west. Since Zephyr v1.14 LTS relies on it, it will continue to be included in the distribution, but will be removed when that version of Zephyr is obsoleted.

  • west.commands:

    • WestCommand.requires_installation: deprecated; use requires_workspace instead

    • WestCommand.requires_workspace: new

    • WestCommand.has_manifest: new

    • WestCommand.manifest: this is now settable

  • west.configuration: callers can now identify the workspace directory when reading and writing configuration files

  • west.log:

    • msg(): new

  • west.manifest:

    • The module now uses the standard logging module instead of west.log

    • QUAL_REFS_WEST: new


    • Defaults: removed

    • Manifest.as_dict(): new

    • Manifest.as_frozen_yaml(): new

    • Manifest.as_yaml(): new

    • Manifest.from_file() and from_data(): these factory methods are more flexible to use and less reliant on global state

    • Manifest.validate(): new

    • ManifestImportFailed: new

    • ManifestProject: semi-deprecated and will likely be removed later.

    • Project: the constructor now takes a topdir argument

    • Project.format() and its callers are removed. Use f-strings instead.

    • Project.name_and_path: new

    • Project.remote_name: new

    • Project.sha() now captures stderr

    • Remote: removed

West now requires Python 3.6 or later. Additionally, some features may rely on Python dictionaries being insertion-ordered; this is only an implementation detail in CPython 3.6, but is is part of the language specification as of Python 3.7.


This point release fixes an error in the behavior of the deprecated west.cmake module.


This point release fixes an error in the behavior of west update --fetch=smart, introduced in v0.6.1.

All v0.6.1 users must upgrade.



Do not use this point release. Make sure to use v0.6.2 instead.

The user-visible features in this point release are:

  • The west update command has a new --fetch command line flag and update.fetch configuration option. The default value, “smart”, skips fetching SHAs and tags which are available locally.

  • Better and more consistent error-handling in the west diff, west status, west forall, and west update commands. Each of these commands can operate on multiple projects; if a subprocess related to one project fails, these commands now continue to operate on the rest of the projects. All of them also now report a nonzero error code from the west process if any of these subprocesses fails (this was previously not true of west forall in particular).

  • The west manifest command also handles errors better.

  • The west list command now works even when the projects are not cloned, as long as its format string only requires information which can be read from the manifest file. It still fails if the format string requires data stored in the project repository, e.g. if it includes the {sha} format string key.

  • Commands and options which operate on git revisions now accept abbreviated SHAs. For example, west init --mr SHA_PREFIX now works. Previously, the --mr argument needed to be the entire 40 character SHA if it wasn’t a branch or a tag.

The developer-visible changes to the West APIs are:

  • west.log.banner(): new

  • west.log.small_banner(): new

  • west.manifest.Manifest.get_projects(): new

  • west.manifest.Project.is_cloned(): new

  • west.commands.WestCommand instances can now access the parsed Manifest object via a new self.manifest property during the do_run() call. If read, it returns the Manifest object or aborts the command if it could not be parsed.

  • west.manifest.Project.git() now has a capture_stderr kwarg


  • No separate bootstrapper

    In west v0.5.x, the program was split into two components, a bootstrapper and a per-installation clone. See Multiple Repository Management in the v1.14 documentation for more details.

    This is similar to how Google’s Repo tool works, and lets west iterate quickly at first. It caused confusion, however, and west is now stable enough to be distributed entirely as one piece via PyPI.

    From v0.6.x onwards, all of the core west commands and helper classes are part of the west package distributed via PyPI. This eliminates complexity and makes it possible to import west modules from anywhere in the system, not just extension commands.

  • The selfupdate command still exists for backwards compatibility, but now simply exits after printing an error message.

  • Manifest syntax changes

    • A west manifest file’s projects elements can now specify their fetch URLs directly, like so:

          - name: example-project-name

      Project elements with url attributes set in this way may not also have remote attributes.

    • Project names must be unique: this restriction is needed to support future work, but was not possible in west v0.5.x because distinct projects may have URLs with the same final pathname component, like so:

          - name: remote-1
          - name: remote-2
          - name: project
            remote: remote-1
            path: remote-1-project
          - name: project
            remote: remote-2
            path: remote-2-project

      These manifests can now be written with projects that use url instead of remote, like so:

          - name: remote-1-project
          - name: remote-2-project
  • The west list command now supports a {sha} format string key

  • The default format string for west list was changed to "{name:12} {path:28} {revision:40} {url}".

  • The command west manifest --validate can now be run to load and validate the current manifest file, among other error-handling fixes related to manifest parsing.

  • Incompatible API changes were made to west’s APIs. Further changes are expected until API stability is declared in west v1.0.

    • The west.manifest.Project constructor’s remote and defaults positional arguments are now kwargs. A new url kwarg was also added; if given, the Project URL is set to that value, and the remote kwarg is ignored.

    • west.manifest.MANIFEST_SECTIONS was removed. There is only one section now, namely manifest. The sections kwargs in the west.manifest.Manifest factory methods and constructor were also removed.

    • The west.manifest.SpecialProject class was removed. Use west.manifest.ManifestProject instead.


West v0.5.x is the first version used widely by the Zephyr Project as part of its v1.14 Long-Term Support (LTS) release. The west v0.5.x documentation is available as part of the Zephyr’s v1.14 documentation.

West’s main features in v0.5.x are:

  • Multiple repository management using Git repositories, including self-update of west itself

  • Hierarchical configuration files

  • Extension commands

Versions Before v0.5.x

Tags in the west repository before v0.5.x are prototypes which are of historical interest only.