See subject. I had to just fix a bunch of UITests again,
<https://gerrit.libreoffice.org/#/c/68683/> "Fix some UITests to use
copies of SRCDIR documents". This not only affects whether tests
succeed with a read-only source tree, but also helps in other scenarios
like documented in the commit message of
<https://gerrit.libreoffice.org/plugins/gitiles/core/+/5eb9dd46e9b3ba18afd4f6dac580c4b91e715f43%5E!/>
"More temp copies of test docs in Python/UITests": "I had cancelled
(ctrl-c) a `make check` midway, when it happened to be in the middle of
UITest_calc_tests2 and left beind a
sc/qa/uitest/calc_tests/data/.~lock.stableSorting.ods# lock file (which
records, among other things, the host name). I then dropped off a VPN,
which caused the host name as seen by LO to switch from 'alpha' to
'alpha.fritz.box', then re-started the build as `make check screenshot`
(which was the thing I'd originally intended, but forgotten the
screenshot target). The new built hung during UITest_calc_tests2's
sc/qa/uitest/calc_tests2/stableSorting.py, as loading
sc/qa/uitest/calc_tests/data/stableSorting.ods found the lock file with
non-matching host name in SfxMedium::LockOrigFileOnDemand, and hung in
SfxMedium::ShowLockedDocumentDialog -> UUIInteractionHandler::handle ->
(switch to main thread...) ->
UUIInteractionHelper::handleLockedDocumentRequest -> ... ->
Dialog::Execute, which just blocks in svp mode (which, unlike
--headless, doesn't cause Application::IsDialogCancelEnabled)."
For reference, my script to do test builds with a read-only source tree
on Linux is
set -ex
git clone https://git.libreoffice.org/core ~/lo-ro/core
(cd ~/lo-ro/core && ./g -f clone)
mkdir ~/lo-ro/source
sudo mount -o bind,ro ~/lo-ro/core ~/lo-ro/source
mkdir ~/lo-ro/build
ln -s ../autogen.input ~/lo-ro/build/autogen.input
cd ~/lo-ro/build
../source/autogen.sh
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