I have a very automated build/deploy process, and it just broke.
I believe this suggests a bug/breaking change in mw REL1_29 ( 4e8366eae3 ) .
Specifically "php update.php --quick" is failing.
extensions/Bootstrap/src/Hooks/SetupAfterCache.php complains at line 162.
"Expected an accessible /extensions/Bootstrap/resources/bootstrap path"
however if I hardcode prepend so that the path is "/var/www/html/extensions/Bootstrap/resources/bootstrap" all proceeds as it used to. Since /var/www/html/ is where I'm installing, it seems the install path is missing. However the steps that trigger this have worked for years against numerous previous versions.