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Added app.print_error() to consistently print an error while
running the pipeline stuff.
Also make bst push & pull commands more consistent with
the rest, and print the summary at the end as expected.
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o Now print the message itself on the same line in place of the abbreviated log file
o When reading back the last lines of the log file, prefix that
with an informative message about whence the log lines come,
showing the full unabbreviated log file.
o Fixed the behavior of read_last_lines() so that it works as
intended, problems were:
- Was prepending an additional newline when the log contains
more lines than we want to print
- Was not printing anything at all in the case we want to
print more lines than exist in the log
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Now any BuildStream exception can potentially add detail to
the errors they raise.
Allow detail strings already in PluginError()
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Dont make the ERROR message explicitly anymore, leave that
to the frontend to sort out.
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This is already problematic as this particular error is
reported but fails to fail the session correctly.
Documented this in issue #187
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using it.
Errors are fatal, as such plugins must raise either SourceError() or ElementError().
This method was never used in plugins so far, lets remove it even
though we are technically breaking (unused) API for the overall
betterment of the API.
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This works around an inconsistent behavior with setuptools.
Newer versions of setuptools fail to preserve symbolic links when
creating a source distribution, meaning that tests run from the
dist tarball will fail.
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We had a cache key instability issue with local sources generating
inconsistent cache keys due to iterating over their files in
a random order. Tests did not catch this previously due to the local
source sample only using one file to iterate over.
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Technically this breaks cache keys for the local source, but as
this comes in a branch which fixes local source cache keys to be
stable (they were random before this branch), we wont bother with
considering this enhancement a separate API break, the cache key
breakage was inescapable anyway.
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This is needed because plugins make use of this function to
generate a cache key which must be stable.
In addition to the above, this patch also mitigates the performance
hit of sorting, and allows _process_list() to function to iterate
through the generator when additional sorting is not needed.
This patch is an enhanced version of Sam Thursfield's patch on MR !216
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libfuse
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This fixes issue #183.
Also move the `format-version` related documentation to the first
section "Essentials", beside the project name and element path, since
this is a quite global option it belongs here and not hidden away
with the plugin loading documentation.
Also adjust the main index.rst to include the plugins sub-section
as an adjacent sub-point of the project configuration (consistent
with other project configuration sections).
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Also removed some things which are either of little importance, not
worth mentioning, or covered already by the buildstream user documentation.
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It's more suitable to add this note here than to have a separate section
in the HACKING.rst for this.
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error time
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If a plugin raises an error, prepend the plugin identifier to the
error message and raise PipelineError.
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This also makes main.py less redundant, for some reason there was a stray
call to app.pipeline.initialize() beside app.initialize() in every function,
instead move that into app.initialize() where we now handle the error
and exit gracefully.
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Enhanced the error checking Result() methods to always assert that
the CLI actually exited, there are no cases worth testing for where
buildstream would be expected to exit on an unhandled exception.
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It looks like this newly added test assumes the user has a very recent
version of pytest, which supports treating the `tmpdir` fixture like
a string.
A reasonable alternative to this patch would be require at minimum
a version of pytest which supports this newly introduced API.
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Instead add a comment about why this is really there,
and invoke sphinx python modules with python3 directly.
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Some of the warnings from sphinx-build are really just warnings,
but a lot of the things we want to avoid and really break documentation,
like broken internal references and some invalid rst directives should
really be errors.
Now we treat all warnings as errors, this should ensure that
any commits landing upstream never break the docs.
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This makes writes done by `bst track` atomic, meaning a crash or power
loss while overwriting a .bst file should never cause the the contents
of that file to be lost or partially written.
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This avoids a circular dependency between the 'utils' and '_yaml'
modules.
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This is a context manager that can be used to divert file writes into a
temporary file, which is then renamed into place once writing is
complete. It is primarily intended for use by source plugins which
download files, so they can ensure that their downloads appear atomic
and there is no risk of leaving half-downloaded files in the cache.
So far this is not used in the core, but it is needed by the Docker
source plugin that is proposed for the bst-external plugins repo. See:
https://gitlab.com/BuildStream/bst-external/merge_requests/9
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Fixes the warning:
WARNING: /path/to/buildstream/doc/source/install.rst:45: (WARNING/2) Title underline too short.
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Recently I added the `reason` member which can be used to set
machine readable error reason strings for the purpose of testing.
Forgot to add the necessary `*` argument, forcing `reason` to be
a keyword-only argument.
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Some basic module metadata before publishing the 1.0 release.
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When fetching a downloadable source, we make a defensive check
to avoid redundant download at fetch() time by checking if it's
already cached, but fetch() will never be called if the source
is already cached.
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This has remained without test coverage mostly due to upstream
pytest-datafiles bug https://github.com/omarkohl/pytest-datafiles/issues/1
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Seems that local.py is an appropriate plugin to use for testing
errors which originate from the abstract Source class.
This test checks that we raise the appropriate error in the case
that we attempt to stage to a directory that is a regular file.
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The local plugin is always Consistency.CACHED, this means that
fetch(), set_ref() and get_ref() methods will never be called.
Instead of omitting them, just "pragma: nocover" on the `pass`
statements, making our coverage report more realistic.
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The patch plugin was checking if the target directory exists, however
this is automatically guaranteed by the Source abstract class and
documented to be guaranteed as well.
Since this error cannot be caught by the plugin (it will be caught
in advance by the Source class), removing the check from patch.py.
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directory
This changes the UX to report a better human readable error, which
is otherwise a BUG message with stack trace.
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This also fixes #177 - the problem here was solved simply
by passing the project directory to `cli.run(project=project...)`
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Also added a test case for the `patch` plugin which checks for graceful
failure when the specified patch file is not a regular file (but a block
device or a named pipe instead).
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Before this, we only stored the last exception to have been raised in the main
process, now we additionally provide some Result members allowing tests to
inspect a machine readable error `domain` and `reason` describing why
a task has "failed".
This adds some new APIs to the Result() object for tests:
assert_main_error() - asserts the nature of the main buildstream error
assert_task_error() - asserts the nature of the error from a child task
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