c52c383f1b
Provide a "when" option that provides for not installing packages based on a = or != match on an environment variable. Unit tests are added. Change-Id: Ifa824dccaff69fd447f45d54cb4a3083bcabdd86
102 lines
3.3 KiB
ReStructuredText
102 lines
3.3 KiB
ReStructuredText
================
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package-installs
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================
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The package-installs element allows for a declarative method of installing and
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uninstalling packages for an image build. This is done by creating a
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package-installs.yaml or package-installs.json file in the element directory.
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In order to work on Gentoo hosts you will need to manually install
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`dev-python/pyyaml`.
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example ``package-installs.yaml``
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.. code-block:: YAML
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libxml2:
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grub2:
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phase: pre-install.d
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networkmanager:
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uninstall: True
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os-collect-config:
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installtype: source
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linux-image-amd64:
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arch: amd64
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dmidecode:
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not-arch: ppc64, ppc64le
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lshw:
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arch: ppc64, ppc64le
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python-dev:
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dib_python_version: 2
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python3-dev:
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dib_python_version: 3
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package-a:
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when: DIB_USE_PACKAGE_A = 1
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package-b:
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when: DIB_USE_PACKAGE_A != 1
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example package-installs.json
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.. code-block:: json
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{
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"libxml2": null,
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"grub2": {"phase": "pre-install.d"},
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"networkmanager": {"uninstall": true}
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"os-collect-config": {"installtype": "source"}
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}
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Setting phase, uninstall, or installtype properties for a package overrides
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the following default values::
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phase: install.d
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uninstall: False
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installtype: * (Install package for all installtypes)
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arch: * (Install package for all architectures)
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dib_python_version: (2 or 3 depending on DIB_PYTHON_VERSION, see dib-python)
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Setting the installtype property causes the package only to be installed if
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the specified installtype would be used for the element. See the
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diskimage-builder docs for more information on installtypes.
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The ``arch`` property is a comma-separated list of architectures to
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install for. The ``not-arch`` is a comma-separated list of
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architectures the package should be excluded from. Either ``arch`` or
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``not-arch`` can be given for one package - not both. See
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documentation about the ARCH variable for more information.
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The ``when`` property is a simple ``=`` or ``!=`` match on a value in
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an environment variable. If the given environment variable matches
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the operation and value, the package is installed. If the variable is
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not available in the environment, an exception is raised (thus
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defaults will likely need to be provided in ``environment.d`` files or
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similar for flags used here). For example, to install an extra
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package when a feature is enabled::
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package:
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when: DIB_FEATURE_FLAG=1
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To install ``package`` when ``DIB_FEATURE_FLAG=0`` but
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``other_package`` when ``DIB_FEATURE_FLAG=1`` (i.e. toggle between two
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packages), you can use something like::
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package:
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when: DIB_FEATURE_FLAG=0
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other_package:
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when: DIB_FEATURE_FLAG!=0
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DEPRECATED: Adding a file under your elements pre-install.d, install.d, or
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post-install.d directories called package-installs-<element-name> will cause
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the list of packages in that file to be installed at the beginning of the
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respective phase. If the package name in the file starts with a "-", then
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that package will be removed at the end of the install.d phase.
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Using post-install.d for cleanup
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================================
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Package removal is done in post-install.d at level 95. If you a
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running cleanup functions before this, you need to be careful not
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to clean out any temporary files relied upon by this element.
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For this reason, generally post-install cleanup functions should
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occupy the higher levels between 96 and 99.
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