Build: Make $HOME the default cwd (#8191)

Author: stsewd

readthedocs/doc_builder/environments.py

@@ -102,7 +102,7 @@ def __init__(
     ):
         self.command = command
         self.shell = shell
-        self.cwd = cwd or os.getcwd()
+        self.cwd = cwd or '$HOME'
         self.user = user or settings.RTD_DOCKER_USER
         self.environment = environment.copy() if environment else {}
         if 'PATH' in self.environment:

tox.ini

@@ -11,7 +11,7 @@ setenv =
     LANG=en_US.UTF-8
     LC_ALL=en_US.UTF-8
     DJANGO_SETTINGS_SKIP_LOCAL=True
-passenv = CI TRAVIS TRAVIS_*
+passenv = CI TRAVIS TRAVIS_* HOME
 deps = -r{toxinidir}/requirements/testing.txt
 changedir = {toxinidir}/readthedocs
 basepython =