Implement a composer.installed/update option to disable cache #45093
Description
Description of Issue/Question
There is no obvious way to disable composer cache via the composer-related state and execution modules. It would be great to have one provided.
As it stands, using the composer.installed state with the user option causes the warnings:
Cannot create cache directory /root/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
Cannot create cache directory /root/cache/files/, or directory is not writable. Proceeding without cache
The current best option to avoid both cache and warnings is to create a directory under /tmp, set composer_home to whatever that directory was, and then delete it via onchanges states. This is not ideal.
According to composer/composer#6650 this can be achieved via the COMPOSER_CACHE_DIR environment variable. It might be more flexible to have an option simply expose this environment variable in a way that is similar to how the composer_home option exposes the COMPOSER_HOME environment variable. Then COMPOSER_CACHE_DIR can be set by the user to /dev/null.
Alternatively, a dedicated no_cache option could be implemented which is the equivalent of setting COMPOSER_CACHE_DIR to /dev/null which would be more intuitive but less flexible, so I'm guessing the former implementation method would probably be better.
Versions Report
Salt Version:
Salt: 2017.7.2
Dependency Versions:
cffi: Not Installed
cherrypy: Not Installed
dateutil: 2.5.3
docker-py: Not Installed
gitdb: Not Installed
gitpython: Not Installed
ioflo: Not Installed
Jinja2: 2.8
libgit2: Not Installed
libnacl: Not Installed
M2Crypto: Not Installed
Mako: Not Installed
msgpack-pure: Not Installed
msgpack-python: 0.4.8
mysql-python: 1.3.7
pycparser: Not Installed
pycrypto: 2.6.1
pycryptodome: Not Installed
pygit2: Not Installed
Python: 2.7.13 (default, Nov 24 2017, 17:33:09)
python-gnupg: Not Installed
PyYAML: 3.12
PyZMQ: 16.0.2
RAET: Not Installed
smmap: Not Installed
timelib: Not Installed
Tornado: 4.4.3
ZMQ: 4.2.1
System Versions:
dist: debian 9.3
locale: UTF-8
machine: x86_64
release: 4.9.0-4-amd64
system: Linux
version: debian 9.3