c7c4ec19a3
We try to expose metadata to users about what dib included in the image and source-repositories was not doing that, so this fixes it. It also permits easy introspection from other elements (such as an upcoming PyPI cache layer). Change-Id: I1e48e65f69ebe1f4556cc3bf35ccf195e99bcc76
2.0 KiB
With this element other elements can register source code repositories by placing their details in the file source-repository-*. An example of an element "custom-element" that wants to retrieve the ironic source from git and pbr from a tarball would be
File : elements/custom-element/source-repository-ironic
#<name> <type> <destination> <location> [<ref>]
# <ref> defaults to master if not specified
ironic git /usr/local/ironic git://github.com/openstack/ironic.git
File : elements/custom-element/source-repository-pbr
pbr tar /usr/local/pbr http://tarballs.openstack.org/pbr/pbr-master.tar.gz
diskimage-builder will then retrieve the sources specified and place them at the directory <destination>
A number of environment variables can be set by the process calling diskimage-builder which can change the details registered by the element, these are
DIB_REPOTYPE_<name> : change the registered type
DIB_REPOLOCATION_<name> : change the registered location
DIB_REPOREF_<name> : change the registered reference
for example if you would like diskimage-builder to get ironic from a local mirror you could set DIB_REPOLOCATION_ironic=git://localgitserver/ironic.git
Alternatively if you would like to use the keystone element and build an image with keystone from a stable branch then you would set DIB_REPOREF_keystone=stable/grizzly
Git sources will be cloned to <destination>
Tarballs will be extracted to <destination>. Tarballs should contain a single topleval directory, regardless of the name of this top level directory it will be renamed to <destination>
If mulitple elements register a source location with the same then source-repositories will exit with an error. Care should therefore be taken to only use elements together that download source to different locations.
The repository paths built into the image are stored in etc/dib-source-repositories, one repository per line. This permits later review of the repositories (by users or by other elements).