381ff6ab1d
Fixes problems found by set -eu and pipefail, including: -Many unset variables -Commands that can fail under normal circumstances, which breaks with set -e. This change swallows those expected errors to allow our existing error code to handle them. -The dkms element was not finding Fedora kernel versions correctly. This may be an issue for other distros too, but since Fedora was working fine without this functionality I only changed it to print a warning message rather than failing the build when it happens. -The ramdisk init script will not be set -eu because if it fails the result is a kernel panic, which can be tricky to debug. However, in testing with set -e a few failing commands were found and have been fixed in this patch. Change-Id: I44cf98dfc80cfcaec54b88cc83be80a3dbf2cec3 |
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Provide yum specific image building glue.
RHEL/Fedora/CentOS and other yum based distributions need specific yum customizations.
Customizations include caching of downloaded yum packages outside of the build chroot so that they can be reused by subsequent image builds. The cache increases image building speed when building multiple images, especially on slow connections. This is more effective than using an HTTP proxy as a yum cache since the same rpm from different mirrors is often requested.