A recent(-ish) change in git [1] has exposed a bug in caching that
appears in one very specific circumstance -- updating the
openstack/openstack super-repo [2].
This repo gets a submodule update every time something is pushed. By
using "--git-dir" while the cwd is one-level above the actual repo we
are confusing [1] which is not finding the submodule directories
correctly and giving us an error:
Could not access submodule 'foo'
for every submodule that has updated between now and the last time we
updated the cache. [3]
The git manual does warn about this
If you just want to run git as if it was started in <path> then use
git -C <path>.
Indeed, that is what we want to do in this path. Modify the calls to
use -C.
[1] 505a276596
[2] https://opendev.org/openstack/openstack/
[3] The result for opendev production is that image builds fail every
time an openstack/* project is checked in; we then race to retry
the build before another commit lands and updates the submodules
again.
Change-Id: Iadb23454e29d8869e11407e1592007b0f0963e17
When the mirror returns a error, it was trying to interpret the error
message (e.g. <html><title>Internal server error..) as a download link.
By using -f on curl we get an empty reply and an exit code, which, as
we run in set -e mode, aborts.
Change-Id: Ibaa39aedb7db286f859c4b090114c6a233b150c7
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).
The problem with this is that editable/development installs (pip -e)
do *not* install data_files. Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.
data_files is really the wrong thing to use for what are essentially
assets of the program. data_files install works well for things like
config-files, init.d files or dropping documentation files.
By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from. In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].
We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.
Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.
I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.
Unfortunately, this has to move to work with setuptools. You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.
[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do. Essentially for us it's returning
__file__.
Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
