importlib.machinery.ModuleSpec and find_spec() were introduced in Python 3.4
under PEP 451. They replace the find_module() API of PEP 302, which was
deprecated from Python 3.4. They were removed in Python 3.12 along with the
imp module.
This change adds support for the PEP 451 APIs. Mitogen should no longer import
imp on Python versions that support ModuleSpec. Tests have been added to cover
the new APIs.
CI jobs have been added to cover Python 3.x on macOS.
Refs #1033
Co-authored-by: Witold Baryluk <witold.baryluk@gmail.com>
This is the most minimal change for what might be relatively minimal
edge case. Alternative is replacing reload(), but let's not do that yet.
Closes#555
Minify-safe files are marked with a magical "# !mitogen: minify_safe"
comment anywhere in the file, which activates the minifier. The result
is naturally cached by ModuleResponder, therefore lru_cache is gone too.
Given:
import os, mitogen
@mitogen.main()
def main(router):
c = router.ssh(hostname='k3')
c.call(os.getpid)
router.sudo(via=c)
SSH footprint drops from 56.2 KiB to 42.75 KiB (-23.9%)
Ansible "shell: hostname" drops 149.26 KiB to 117.42 KiB (-21.3%)
This change is relatively incomplete -- ideally we could snapshot
os.environ and /etc/environment at startup and respect key deletions
too, but that's a lot more work. Wait for a bug report instead.
Closes#338.
When running any kind of script, rewrite the hashbang like Ansible does,
but subsequently ignore it and explicitly use a fragment of shell from
the ansible_*_interpreter variable to call the interpreter, just like
Ansible does.
This fixes hashbangs containing '/usr/bin/env A=1 bash' on Linux, where
putting that into a hashbang line results in an infinite loop.
* ansible: use unicode_literals everywhere since it only needs to be
compatible back to 2.6.
* compat/collections.py: delete this entirely and rip out the parts of
functools that require it.
* Introduce serializable Kwargs dict subclass that translates keys to
Unicode on instantiation.
* enable_debug_logging() must set _v/_vv globals.
* cStringIO does not exist in 3.x.
* Treat IOLogger and LogForwarder input as latin-1.
* Avoid ResourceWarnings in first stage by explicitly closing fps.
* Fix preamble_size.py syntax errors.
The controller must know the ID of the forked child in order to
propagate dependencies to it, so forking+starting the module run cannot
happen entirely on the target, without some additional mechanism to
wait-and-repropagate the deps as they arrive on the target.
Rework things so that init_child() also handles starting the fork parent,
and returns it along with the context's home directory in a single round
trip.
Now master knows the identity of the fork parent, it can directly create
fork children and call run_module_async() in them. This necessitates 2
roundtrips to start an asynchronous task.
This whole thing sucks and entirely needs simplified, but for now things
almost work, so keeping it.
connection.py:
* Expect ContextService to return the entire dict return value of
init_child(). Store the fork_contxt from the return value.
planner.py:
* Rework Planner to store the invocation as an instance attribute, to
simplify method calls.
* Add Planner.get_push_files() and Planner.get_module_deps().
* Add _propagate_deps() which takes a Planner and ensures the deps it
describes are sent to a (non forked or forked) context.
* Move async task logic out of target.py and into invoke() /
_invoke_*().
process.py:
* Services no longer need references to each other. planner.py handles
sending module deps with one extra RPC.
services.py:
* Return "init_child_result" key instead of simple "home_dir" key.
* Get rid of dep propagation from ModuleDepService, it lives in
planner.py now.
target.py:
* Get rid of async task start logic, lives in planner.py now.
planner.py:
* Rather than grant FileService access to a file for children, use
PushFileService to trigger deduplicating send of the file through
the hierarchy immediately.
* Send the complete list of Ansible module imports to the target so
runner.py knows which files and scripts must be loaded via
PushFileService prior to detaching.
runner.py:
* Teach NewStyleRunner to use the full module map to block until
everything is loaded prior to detach().
target.py:
* Delete old _get_file(), replace get_file() with get_small_file()
which uses PushFileService instead.
Closes#186
Alex Willmer