f24e78a48d
jenkin => jenkins on ci.md documention => documentation on developer/caches.html typicallly => typically on developer/developing_elements.html Closes-Bug: #1476993 Change-Id: Ie40205debad5dbc6074e65672e0f3ebeaee5b08e
38 lines
1.2 KiB
ReStructuredText
38 lines
1.2 KiB
ReStructuredText
Caches and offline mode
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=======================
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Since retrieving and transforming operating system image files, git
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repositories, Python or Ruby packages, and so on can be a significant overhead,
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we cache many of the inputs to the build process in ~/.cache/image-create/. The
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writing an element documentation describes the interface within
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disk-image-builder for caching. When invoking disk-image-builder the --offline
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option will instruct disk-image-builder to not refresh cached resources.
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Note that we don't maintain operating system package caches, instead depending
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on your local infrastructure (e.g. Squid cache, or an APT or Yum proxy) to
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facilitate caching of that layer, so you need to arrange independently for
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offline mode.
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Base images
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-----------
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These are cached by the standard elements - fedora, redhat, ubuntu,
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debian and opensuse.
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source-repositories
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-------------------
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Git repositories and tarballs obtained via the source-repositories element will
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be cached.
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C and C++ compilation
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---------------------
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Ccache is configured by the base element. Any compilation that honours ccache
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will be cached.
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PyPI
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----
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The pypi element will bind mount a PyPI mirror from the cache dir and configure
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pip and easy-install to use it.
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