* lookups, make file searching use better is_role
The dwim function will internally try by detecting tasks/main['','.yml','.yaml]
but this is far from optimial, the existince of role path in vars is much better
indicator that we can use to pass a hint
* updated test to avoid main.yml
* Run svn integration test locally with TLS
This patch uses a `trustme` to make an ephemeral CA, and server, and
client TLS artifacts for testing. These are integrated into the Apache
web server via it's `mod_ssl`.
Resolves#82207
* Replace GitHub SVN HTTPS URL w/ localhost over TLS
This change gets rid of the need to use GitHub, which is just about to
drop support for SVN [[1]]. Moreover, it eliminates the need to use
external network for any SVN commands in the test.
[1]: https://github.blog/2023-01-20-sunsetting-subversion-support/
Set the tarfile attribute to a normalized value from unfrackpath instead
of validating path parts and omiting potentially invald parts
Allow tarfile paths/links containing '..', '$', '~' as long as the
normalized realpath is in the tarfile's role directory
* apt_repository: Do not convert symlink repo to a normal file
* module manually writes to repo files. If the file is a symlink
module used to re-write and convert a symlink to a normal file.
This fix tracks the symlink and keeps the changes intact.
Fixes: #49809
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Enable use of vendored copy of distutils by removing
the environment variable SETUPTOOLS_USE_DISTUTILS
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* dont warn about using a yescrypt hash as password
Signed-off-by: Thomas Sjögren <konstruktoid@users.noreply.github.com>
* add changelog
Signed-off-by: Thomas Sjögren <konstruktoid@users.noreply.github.com>
* add yescrypt test
Signed-off-by: Thomas Sjögren <konstruktoid@users.noreply.github.com>
---------
Signed-off-by: Thomas Sjögren <konstruktoid@users.noreply.github.com>
- Update `data2_vaulted_string_with_id` to match the documented plaintext.
- Add a comment explaining how `data2_vaulted_string_with_id` was derived.
- Add assertions for unvaulted values to ensure they match their plaintext.
- Add round-trip tests for vault+unvault when no salt is used.
Adds an option that can have an action plugin tell the module to ignore
options that do not fit its arg spec. This is to enable support for core
running modules that exist outside of the collection that may not be new
enough to support some of the options supplied to it.
* Improve host_group_vars efficiency:
* normalize the basedir with `os.path.realpath()` once and cache it
* cache missing paths/files
* reduce the calls to `isinstance`
Add a couple more general improvements in vars/plugins.py get_vars_from_path():
* call `PluginLoader.all()` once for vars plugins and reload specific
plugins subsequently
* don't reload legacy/builtin vars plugins that are not enabled
Add a test for host_group_vars and legacy plugin loading
Co-authored-by: Matt Davis <mrd@redhat.com>
* changelog
* Add a new is_stateless attribute to the vars plugin baseclass
update integration tests to be quieter and use the same test pattern
Fix deprecation and adjust test that didn't catch the issue (deprecation only occured when the value was False)
move realpath cache to host_group_vars (do not smuggle call state as instance data)
refactor under a single 'if cache:' statement
Call os.path.isdir instead of always calling os.path.exists first. Just call os.path.exists to differentiate between missing and non-directory.
remove call to super(VarsModule, self).get_vars()
use the entity name as the cache key instead of variable location
Remove isinstance checks and use a class attribute just in case any plugins are subclassing Host/Group
Replace startswith by checking index 0 of the name instead, since host/group names are required
* rename is_stateless to cache_instance to make it more clear what it does
* add plugin instance cache using the path to plugin loader
reduce loading stage option if a new instance isn't created
don't require a known subdir on PluginLoader instantiation for backwards
compatibility
rename attribute again
contain reading from/initializing cached instances to a plugin loader method
* Deprecate v2 vars plugins
* Refactor to use the cache in existing plugin loader methods
Rename the attribute again
Refactor host_group_vars with requested changes
Make changelog a bugfixes fragment
Add a deprecation fragment for v2 vars plugins.
Add type hints
* unbreak group_vars
* Apply suggestions from code review
* misc tweaks
* always cache instance by both requested and resolved FQ name
* add lru_cache to stage calculation to avoid repeated config consultation
* handle KeyError from missing stage option
---------
Co-authored-by: Matt Davis <mrd@redhat.com>
When templating tags (which happens outside of standard `post_validate`) we
need to template each object in the inheritance chain and set the templated
values on those objects individually. That way when `task.tags` is called the
`extend` functionality properly picks up the templated values of all
parents into one flatten list.
Fixes#81053
revert to previous behavior to push vars to play at compile time
add `public` parameter to allow per import control of exporting (vs just the global config)
Co-authored-by: tchernomax <maxime.deroucy@gmail.com>
Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>
Provide more information about plugin usage which needs to be
used instead of the deprecated plugin in the deprecation message.
Fixes: #80561
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Test heuristic_log_sanitize. See #81689
* Add note about what this test is doing
* grammar
Co-authored-by: Matt Clay <matt@mystile.com>
---------
Co-authored-by: Matt Clay <matt@mystile.com>
PR #81606.
Prior to this patch, when `--pre` CLI flag was not passed, the
dependency resolver would treat concrete collection dependency
candidates (Git repositories, subdirs, tarball URLs, or local dirs or
files etc) as not meeting the requirements.
This patch makes it so pre-releases in any concrete artifact
references, and the ones being specifically pinned dependencies or
user requests, met anywhere in the dependency tree, are allowed
unconditionally.
This is achieved by moving the pre-release check from
`is_satisfied_by()` to the `find_matches()` hook, following the
Pip's example.
As a bonus, this change also fixes the situation when a collection
pre-releases weren't considered if it didn't have any stable releases.
This now works even if `--pre` wasn't requested explicitly.
Finally, this patch partially reverts commit
6f4b4c345b, except for the tests. And it
also improves the `--pre` hint warning to explain that it mostly
affects Galaxy/Automation Hub-hosted collection releases.
Ref #73416
Ref #79112Fixes#79168Fixes#80048Resolves#81605
Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>
* Symlinks in the collection might be pointing to non-existent
targets. Check and report the failure to the user.
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* when --diff is used with content parameter, print destination
path instead of temporary file path.
Fixes: #79749
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* If all tasks in the role are skipped or unreachable, the role is not marked as complete for the host.
* Only mark the role as complete if a task in the role succeeds or fails for the host.
* Before performing shredding the original file, check if the
destination file location is writable or not. This will
prevent corruption of original file.
Fixes: #81455
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Python 3.11.4 introduces a new parameter 'filter' in extract and
extractall in tarfile. Handle deprecation warning message emitted
in Python 3.12.
* added probing mechanism in ansible-galaxy code to detect broken
data filter implementation in tarfile.
Fixes: #80832
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
Co-authored-by: Matt Clay <matt@mystile.com>
Improves the error checking when running PowerShell modules using
Ansible.ModuleUtils.Legacy. It will only return an rc of 1 if both the
PowerShell module runner signalled an error occurred and those error
records were present in the output. This should reduce some false
positive errors when using the older module style.
* apt: ignore fail_on_autoremove and allow_downgrade when using aptitude
* fail_on_autoremove (--no-remove) and allow_downgrade (--allow-downgrades)
parameters are only valid for apt-get and not for aptitude. Ignore them when
aptitude is detected and used.
Fixes: #77868
* Gather value of password using debconf-get-selections command,
use this information for idempotency.
Fixes: #47676
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Back out use of communicate, add better comments, add bufsize, and align with subprocess._communicate
* tests
* re-order logic slightly
* more comments
* loopty loop
* yet another comment
* Revert "yet another comment"
This reverts commit 96cd8ada5fa0441b92f2298bdaa6cb40594847d2.
* Revert "loopty loop"
This reverts commit 96ea066f6a7d18902c04a14f18dd79b38e56f5e7.
* ci_complete
* Copy in comment too
* Wording updates
Co-authored-by: Matt Davis <6775756+nitzmahone@users.noreply.github.com>
* Back out bufsize
---------
Co-authored-by: Matt Davis <6775756+nitzmahone@users.noreply.github.com>
* a recent optimization lost the unsafe lookup disable behavior when templating conditionals with inline templates that referred to untrusted values
* added regression test to catch this case
* iptables chain creation does not populate with a rule
fixes#80256
* Add changelog fragment
* Add rules and flush chain during integration tests
* Check chain rule on comment
* Update test/integration/targets/iptables/tasks/chain_management.yml
* ansible-galaxy - improve ignoring multiple signature status codes when using --ignore-signature-status-code
* fix backwards compatibility by adding a new plural option instead, and hide the singular from --help
Since man pages aren't accessible to users after a `pip install`, there's no need to include them in the sdist.
This change makes it trivial to build man pages from source, which makes them much easier to iterate on.
It also simplifies creation and testing of the sdist, since it no longer requires building man pages.
The new `packaging/cli-doc/build.py` script can generate both man pages and RST documentation.
This supports inclusion on the docs site without a dependency on `ansible-core` internals.
Having a single implementation for both simplifies keeping the two formats in sync.
* Raise the minimum setuptools version to 66.1.0
This is the first version to support Python 3.12.
While Python 3.10 and 3.11 could use an older version, a consistent minimum is easier to work with and test against.
* Fix PEP 517 integration test
* Only install collections which can't be satisfied by a collection in any of the configured paths.
* Improve warning for unexpected collection install path
Fix warning when path is configured, but is a pip-managed path
Normalize the path before validating to fix warning consistency
* ansible-test - Limit scope of replace-urlopen test
Only ansible-core code and plugins in collections can be expected to rely on module_utils.
* ansible-test - Limit scope of use-compat-six test
Only ansible-core code and plugins in collections can be expected to rely on module_utils.
* ansible-test - Limit scope of no-get-exception test
Only ansible-core code and plugins in collections should be checked for usage of outdated module_utils functions.
* Add integration tests
* replace: handle exception while parsing escape char
* Fail early when bad escape character is provided in replace module
Fixes: #79364
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Run tests in Python 3.6 or greater env
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
---------
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Remove docs dir
* Updates to reflect docs removal
* Fix integration test
* Remove examples dir
* Updates to reflect examples removal
* Remove build_library and build-ansible.py
* Remove refs to build_library and build-ansible.py
* Remove obsolete template
* Remove obsolete template reference
* Remove the now obsolete rstcheck sanity test
* first_found lookup, let lookup handle templating errors
Avoids case in which TE was not sending valid and templatable entries to the lookup
The lookup already handles the case TE was attempting to itself, so no need for this code anymore.
Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>
This fixes the issue where handlers notifying other handlers are
not properly run because the notification is not registered unless
another flush_handlers occurs. Instead, if the current host state
is iterating handlers we immediately register the handler to be
run so the notification is not lost.
Fixes#80880
* Check if skeleton is /dev/null while creating home folder
* Add test for linux
Co-authored-by: Holger Dörner <h.doerner@bitexpert.de>
Co-authored-by: Brian Coca <bcoca@users.noreply.github.com>
* Fix remote_tmp tests so that they actually use the remote_tmp
* Isolate remote_tmp dir during remote_tmp tests. Fixes#80965
* Do everything without become
Instead of using Templar.environment in Templar.do_template for
accessing/mutating the environment, myenv local variable should be used
because it is the environment used for actual templating. It can either
point to Templar.environment or newly created environment overlay.
Fixes#80605
Atthe moment if a users wants to protect virtualenv_command by using
quotes around 'venv', module will fail out as literal parsing is used
at the moment. In order to imrpove things, argparse is leveraged to
parse out passed value to the virtualenv_command
Closes-Bug: #76372
Signed-off-by: Dmitriy Rabotyagov <noonedeadpunk@gmail.com>
* fix meaning of parallel in gather_facts
* Update docs with note about parallel not always being faster
* add 'smarter' usage of gahter_timeout for parallel tasks
* restore async when needed, not always
* added typing
* parallelism tests
* Only bypass type validation for null parameters if the default is None. A default is mutually exclusive with required.
* Prevent coercing None to str type. Fail the type check instead.
- Unit tests now report warnings generated during test runs.
- Python 3.12 warnings about `os.fork` usage with threads (due to `pytest-xdist`) are suppressed.
- Added integration tests to verify forked test behavior.
Fixes#73643
* clear_notification method and simplify ifs
* Deduplicate code
* Limit number of Templar creations
* Fix sanity
* Preserve handler callbacks order as they were notified
Most of the bad_parsing tests were no longer running, with several of them no longer being valid.
The invalid tests have been removed and the valid ones rewritten.
Reduce the number of Galaxy API calls made during dependency resolution by fetching remote signatures afterwards, since these are not used in backtracking.
Reduce the verbosity to `-vvvv` (to match other Galaxy API calls) to see this activity.
Co-authored-by: Sviatoslav Sydorenko <webknjaz@redhat.com>
* fix using templated values for include/import role options 'public', 'allow_duplicates', and 'rolespec_validate'
* pass templated values without changing the instance
* Fix templating by setting always_post_validate to True and calling IncludeRole.post_validate() instead
ci_complete
* add changelog
* ansible-galaxy - support `resolvelib >= 0.5.3, < 1.1.0`
<https://pypi.org/project/resolvelib/1.0.1> released on 2023-03-09:
- <https://github.com/sarugaku/resolvelib/blob/main/CHANGELOG.rst#101-2023-03-09>
- <https://github.com/sarugaku/resolvelib/releases/tag/1.0.1>
Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>
* Trigger CI by pinning resolvelib with latest version
Since resolvelib is pre-installed in our test containers, we should temporarily pin the latest version allowed to force the tests to run with that version. Once the tests have passed that commit can be reverted.
Please make those changes without force pushing, so that we keep the reference to the passing CI run. We can squash the commits when merging the PR so the temporary commits won't be in the final commit merged to the devel branch.
Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>
* https://github.com/ansible/ansible/pull/80196#discussion_r1136003637
Also test resolvelib with multiple supported versions.
Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>
* Revert "Trigger CI by pinning resolvelib with latest version"
This reverts commit 5518e5dbca.
---------
Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>
* Pin setuptools to lowest supported @ PEP 517 test
This allows catching the behavior of builds under old setuptools.
* Stop invoking `setup.py install` in tests
This is not the part we care about since it involves dealing with the
external runtime dependencies rather than building our source
distribution.
This patch modifies the in-tree build backend to build sdists that swap
out pointers to it in the `pyproject.toml`'s `[build-system]` section.
The effect of this is that the first build from source (for example,
from a Git checkout) uses our PEP 517 in-tree build backend. But the
produced tarball has `build-backend` set to `setuptools.build_meta`
which is the native build backend of `setuptools`. So any following
builds from that sdist will skip using the in-tree build backend,
calling the setuptools' one.
The good news is that if the first build generated the manpages, they
will be included and won't go anywhere even though, a different build
system is in place.
Combined with #80253, this will make sure not to modify the current
source checkout on that first build.
Co-authored-by: Matt Clay <matt@mystile.com>
* 🧪 Switch macOS 13.2 to 12.0 in CI
The former revealed unexpected flakiness while the latter is the
previous value that was used to be stable. This is a temporary revert.
* Skip lookup_url integration test under macOS 12.0
* ✨ Add macOS 13.2 to `ansible-test`
* 🧪 Replace macOS 12.0 with 13.2 in the CI matrix
* Skip `lookup_url` under macOS 13.2
This is due to https://wefearchange.org/2018/11/forkmacos.rst.html
that manifests itself as follows:
TASK [lookup_url : Test that retrieving a url works] ***************************
objc[15394]: +[__NSCFConstantString initialize] may have been in progress in another thread when fork() was called.
objc[15394]: +[__NSCFConstantString initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in t
he fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.
ERROR! A worker was found in a dead state
* 📝 Extend ansible-test change note w/ macOS 13.2
* 🐛 Make integration tests compatible w/ modern Git
This patch makes use of the `init.defaultBranch` setting to unify
the test across new and old Git versions since one defaults to
`master` and the other uses `main` for the default branch.
Where possible, it uses the `HEAD` committish to avoid having to
normalize the branch name.
The change fixes the following integration tests:
* `ansible-galaxy`
* `ansible-galaxy-collection-scm` (recursive collection)
* `git`
* 🐛Replace `git-symbolic-ref` with a repo template
This custom Git repository template emulates the `init.defaultBranch` setting
on Git versions below 2.28. Ref: https://superuser.com/a/1559582.
Other workarounds mentioned there, like invoking
`git symbolic-ref HEAD refs/heads/main` after each `git init` turned
out to have mysterious side effects that break the tests in surprising ways.
* 🎨 Make Git integration test non-destructive
This patch makes use of the `$HOME` environment variable to trick Git
into using a user-global config generated in the temporary directory.
* unarchive - properly handle relative path for dest
* Add integration test
* Return output of underlying commands with increased verbosity
* Revert "Return output of underlying commands with increased verbosity"
This reverts commit a2790c8275cdc5697b65670a0beffdc74b741bf6.
* Warn when a relative destination path was provided
* Create a queue per WorkerProcess to receive intra-task updates
* Update `pause` action to use the worker queue
* Deprecate ConnectionBase()._new_stdin
* Add new `Display` convenience method `prompt_until` to manage both controller- and worker-sourced prompting without cross-fork stdin sharing, in-worker mechanism to handle request-response over new worker queue.
This patch creates a thin wrapper around the `setuptools`' PEP 517
build backend in-tree. It features an ability to request generating
the manpage files in the process of building a source distribution.
This toggle is implemented using the `config_settings` mechanism of
PEP 517.
One must explicitly pass it a CLI option to the build front-end to
trigger said behavior. The packagers are expected to use the
following call:
python -m build --config-setting=--build-manpages
This option has no effect on building wheels.
🧪 The change includes integration tests
This test runs building and re-building sdists and wheels with and
without the `--build-manpages` config setting under the
oldest-supported and new `setuptools` pinned.
It is intended to preserve the interoperability of the packaging setup
across Python runtimes.
An extra smoke test also verifies that non PEP 517 interfaces remain functional.
PR #79606
Co-authored-by: Matt Clay <matt@mystile.com>
The previous change to the default mode of operation for the plugin is now limited to collections.
This enables easier testing of the plugin in core, so the previously removed tests have been restored.
* Add condition that causes a when to skip a task
* Fix up tests
* Use false_condition instead of failed_condition
* Remove formatting accidentially added
* Fix sanity
* ansible-inventory, add --limit option
* also graph
* optimize the when not providing limit
* added tests and clog
* avoid empty groups, fix tests
* i swear there as an ignore_errors there already!!?!?!?
* Fix stdout test fallback
Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>
* simpler approach using subset against inventory directly
* tyupose
* renamed funciton to what it actuall does
got yaml in line with others about removing empty groups
* have graph ignore limts, also note same for --host
* fixed typo long line
* better test
* cause hosvars are not a thing
---------
Co-authored-by: Matt Davis <6775756+nitzmahone@users.noreply.github.com>
Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>
* Change ansible_job_id format
...to be something that does not resemble float or other type which
value could be changed by literal_eval that jinja2_native uses.
Specifically the format of '%d.%d' is converted from str to float and
then back to float which may result in truncating the number resulting
in the job not being found because the job id does not exist.
* Fix detection of available hashlib algorithms
Detection of hashlib algorithms now works on Python 3.x.
The new implementation works on Python 2.7 and later.
Test coverage is provided by both integration and unit tests.
* Add additional details about hashlib in docs
* quiet default ansible-doc integration test output
* typical non-verbose output was exceeding 27k lines per fun
* disables `set -x` unless `-v` is passed to the script (eg when ansible-test is called with `-v` or `--retry-on-error` adds it on the second try
* added simple progress echoes
* suppress some grep output
* only enable `set -x` for >= `-vvv`
* fix shellcheck default complaint
* Improving the documentation on how we generate the default value of the filename parameter
* fix pep8
* removing unnecessary documentation and improving the module's return
* making the RETURN docs
* pep8
* version_added and changelog
* module._diff
* module._diff fix
* add rudimentary tests for new outputs
---------
Co-authored-by: Matt Davis <mrd@redhat.com>
* Update `collections.abc` imports
- Use `six.moves` for modules and module_utils
- Use `collections.abc` for controller code
This avoids using `ansible.module_utils.common._collections_compat`,
which was added before the vendored `six` was updated to provide these
imports.
* Update _collections_compat to use six.moves
Also update the custom pylint rule to reflect this change.
* add null 'manifest' key to metadata for git repo collections containing MANIFEST.json
changelog
* set to Sentinel instead of None
* Test installing a collection in a git repo that contains a MANIFEST.json
* fix test
* Update changelogs/fragments/ansible-galaxy-install-git-src-manifest.yml
* validate-modules - Remove `__future__` limits
Limits on specific `__future__` imports are handled by other sanity tests.
* Add integration test for module/plugin imports.
* Normalize deprecation records.
* Fix alias deprecations in suboptions.
* Report in which option an alias warning happened for suboptions.
* Add deprecation tests for suboptions.
* Also test deprecation in list of dicts.
* Adjust unit tests for toplevel alias deprecation field name change.
* Add support for importlib.resources
* Remove the importlib.resources imports
* return the correct data
* Some code comments, and re-order for consistency
* Disallow traversing packages below an individual collection
* Add a traversable class for namespaces
* Re-use variable
* Utilize itertools.chain.from_iterable
Co-authored-by: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>
* Simplify logic to check for packages from ansible loaders
Co-authored-by: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>
* Just a generator expression, instead of a generator
* docstrings
* Add comment about find_spec for our namespaces
* Add some initial unit tests for importlib.resources
* normalize
* Utilize importlib.resources for listing collections
* collections_path is already in config, just use config
* install uses a different default for collections_path
* Remove unused import
* Remove duplicate __truediv__
* Bring back TraversableResources
* Apply some small suggestions from code review
Co-authored-by: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>
Co-authored-by: Matt Davis <6775756+nitzmahone@users.noreply.github.com>
* Remove cross contamination between plugin loader code and CLI code
* Remove unused import
Co-authored-by: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>
Co-authored-by: Matt Davis <6775756+nitzmahone@users.noreply.github.com>
* validate-modules: don't fail on invalid YAML
When validate-modules encounters invalid YAML (e.g. in the EXAMPLES
section), it tries to reformat the exception to include the line number
in the Python file instead of the line number of the embedded YAML
document. However, PyYAML doesn't allow modification of the Mark object
(anymore) which leads to a new exception being raised, instead of
reporting the original exception.
As the original exception is not needed in other places anymore, we
don't have to modify it at all and can just compute the right line
number when reporting the error via ansible-test.
Fixes: #75837
* Add test for invalid module doc YAML syntax.
Co-authored-by: Matt Clay <matt@mystile.com>
Also improve the ansible-test-container integration test:
- Add coverage for the no-probe code path.
- Add work-arounds for centos6 containers (to support backporting).
- Avoid systemd debug when the container doesn't use cgroup.
* background threads writing to stdout/stderr can cause children to deadlock if a thread in the parent holds the internal lock on the BufferedWriter wrapper
* prevent writes to std handles during fork by monkeypatching stdout/stderr during display startup to require a mutex lock with fork(); this ensures no background threads can hold the lock during a fork operation
* add integration test that fails reliably on Linux without this fix
Brian Coca