Acre is a lightweight cross-platform environment management Python package that makes it trivial to launch applications in their own configurable working environment.
This sample will compute the result of a dynamic environment that has values that use values from other keys in the environment.
To compute the result of a dynamic environment use acre.compute
import acre
data = {
"MAYA_VERSION": "2018",
"MAYA_LOCATION": "C:/Program Files/Autodesk/Maya{MAYA_VERSION}"
}
env = acre.compute(data)
assert env["MAYA_LOCATION"] == "C:/Program Files/Autodesk/Maya2018"This also works with recursion.
import acre
data = {
"MAYA_VERSION": "2018",
"PIPELINE": "Z:/pipeline",
"APPS": "{PIPELINE}/apps",
"MAYA_LOCATION": "{APPS}/Autodesk/Maya{MAYA_VERSION}"
}
env = acre.compute(data)
assert env["MAYA_LOCATION"] == "Z:/pipeline/apps/Autodesk/Maya2018"You can set up your data with platform specific paths, by using a
dictionary. These need to be parsed with acre.parse
import acre
data = {
"VERSION": "2018",
"MY_LOCATION": {
"windows": "C:/path/on/windows/{VERSION}",
"darwin": "/path/on/mac/osx/{VERSION}",
"linux": "/path/on/linux/{VERSION}"
}
}
env = acre.parse(data, platform_name="windows")
assert env["MY_LOCATION"] == "C:/path/on/windows/{VERSION}"
env = acre.compute(env)
assert env["MY_LOCATION"] == "C:/path/on/windows/2018"
# When *not* explicitly providing a platform name, the current active
# platform is used. So for your active OS:
env = acre.parse(data)
env = acre.compute(env)
print(env["MY_LOCATION"])The final touch for getting your environment ready and in use is to merge it with your environment. So:
import os
import acre
data = {
"PIPELINE": {
"windows": "P:/pipeline",
"darwin": "//share/pipeline",
"linux": "//share/pipeline",
},
"CUSTOMPATH": "{PATH}",
"DATAPATH": "{PIPELINE}/mydata"
}
# Parse the platform specific variables
env = acre.parse(data, platform_name="windows")
# Compute the dynamic environment
env = acre.compute(env)
# Merge it with your local environment
env = acre.merge(env, current_env=os.environ)
# Update your local environment
os.environ.update(env)
# Now it's live!
assert os.environ["DATAPATH"] == "P:/pipeline/mydata"For more usage examples see tests/
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