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"""Plugins to extract coverage data from various formats.""" |
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import os |
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from abc import ABCMeta, abstractmethod |
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import time |
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import webbrowser |
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import logging |
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import coverage |
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from six import with_metaclass |
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from .cache import Cache |
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log = logging.getLogger(__name__) |
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cache = Cache() |
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class BasePlugin(with_metaclass(ABCMeta)): # pragma: no cover (abstract class) |
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"""Base class for coverage plugins.""" |
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@abstractmethod |
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def matches(self, cwd): |
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"""Determine if the current directory contains coverage data. |
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:return bool: Indicates that the current directory should be processed. |
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""" |
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@abstractmethod |
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def get_coverage(self, cwd): |
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"""Extract the coverage data from the current directory. |
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:return float: Percentage of lines covered. |
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""" |
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@abstractmethod |
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def get_report(self, cwd): |
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"""Get the path to the coverage report. |
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:return str: Path to coverage report or `None` if not available. |
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""" |
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def get_coverage(cwd=None): |
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"""Extract the current coverage data.""" |
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cwd = cwd or os.getcwd() |
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plugin = _find_plugin(cwd) |
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percentage = plugin.get_coverage(cwd) |
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return round(percentage, 1) |
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def launch_report(cwd=None): |
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"""Open the generated coverage report in a web browser.""" |
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cwd = cwd or os.getcwd() |
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plugin = _find_plugin(cwd, allow_missing=True) |
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if plugin: |
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path = plugin.get_report(cwd) |
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if path and not _launched_recently(path): |
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log.info("Launching report: %s", path) |
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webbrowser.open("file://" + path, new=2, autoraise=True) |
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def _find_plugin(cwd, allow_missing=False): |
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"""Find an return a matching coverage plugin.""" |
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for cls in BasePlugin.__subclasses__(): # pylint: disable=no-member |
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plugin = cls() |
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if plugin.matches(cwd): |
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return plugin |
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msg = "No coverage data found: {}".format(cwd) |
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log.info(msg) |
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if allow_missing: |
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return None |
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raise RuntimeError(msg + '.') |
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def _launched_recently(path): |
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now = time.time() |
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then = cache.get(path, default=0) |
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elapsed = now - then |
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log.debug("Last launched %s seconds ago", elapsed) |
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cache.set(path, now) |
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return elapsed < 60 * 60 # 1 hour |
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class CoveragePy(BasePlugin): |
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"""Coverage extractor for the coverage.py format.""" |
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def matches(self, cwd): |
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return '.coverage' in os.listdir(cwd) |
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def get_coverage(self, cwd): |
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os.chdir(cwd) |
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cov = coverage.Coverage() |
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cov.load() |
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with open(os.devnull, 'w') as ignore: |
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total = cov.report(file=ignore) |
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return total |
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113
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def get_report(self, cwd): |
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path = os.path.join(cwd, 'htmlcov', 'index.html') |
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if os.path.isfile(path): |
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log.info("Found coverage report: %s", path) |
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return path |
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120
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log.info("No coverage report found: %s", cwd) |
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return None |
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jacebrowning /
coverage-space-cli
Loading history...
Abstract classes which are used only once can usually be inlined into the class which already uses this abstract class.