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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
"""Source file annotation for coverage.py."""
from __future__ import annotations
import os
import re
from typing import Iterable, Optional, TYPE_CHECKING
from coverage.files import flat_rootname
from coverage.misc import ensure_dir, isolate_module
from coverage.plugin import FileReporter
from coverage.report import get_analysis_to_report
from coverage.results import Analysis
from coverage.types import TMorf
if TYPE_CHECKING:
from coverage import Coverage
os = isolate_module(os)
class AnnotateReporter:
"""Generate annotated source files showing line coverage.
This reporter creates annotated copies of the measured source files. Each
.py file is copied as a .py,cover file, with a left-hand margin annotating
each line::
> def h(x):
- if 0: #pragma: no cover
- pass
> if x == 1:
! a = 1
> else:
> a = 2
> h(2)
Executed lines use ">", lines not executed use "!", lines excluded from
consideration use "-".
"""
def __init__(self, coverage: Coverage) -> None:
self.coverage = coverage
self.config = self.coverage.config
self.directory: Optional[str] = None
blank_re = re.compile(r"\s*(#|$)")
else_re = re.compile(r"\s*else\s*:\s*(#|$)")
def report(self, morfs: Optional[Iterable[TMorf]], directory: Optional[str] = None) -> None:
"""Run the report.
See `coverage.report()` for arguments.
"""
self.directory = directory
self.coverage.get_data()
for fr, analysis in get_analysis_to_report(self.coverage, morfs):
self.annotate_file(fr, analysis)
def annotate_file(self, fr: FileReporter, analysis: Analysis) -> None:
"""Annotate a single file.
`fr` is the FileReporter for the file to annotate.
"""
statements = sorted(analysis.statements)
missing = sorted(analysis.missing)
excluded = sorted(analysis.excluded)
if self.directory:
ensure_dir(self.directory)
dest_file = os.path.join(self.directory, flat_rootname(fr.relative_filename()))
if dest_file.endswith("_py"):
dest_file = dest_file[:-3] + ".py"
dest_file += ",cover"
else:
dest_file = fr.filename + ",cover"
with open(dest_file, "w", encoding="utf-8") as dest:
i = j = 0
covered = True
source = fr.source()
for lineno, line in enumerate(source.splitlines(True), start=1):
while i < len(statements) and statements[i] < lineno:
i += 1
while j < len(missing) and missing[j] < lineno:
j += 1
if i < len(statements) and statements[i] == lineno:
covered = j >= len(missing) or missing[j] > lineno
if self.blank_re.match(line):
dest.write(" ")
elif self.else_re.match(line):
# Special logic for lines containing only "else:".
if j >= len(missing):
dest.write("> ")
elif statements[i] == missing[j]:
dest.write("! ")
else:
dest.write("> ")
elif lineno in excluded:
dest.write("- ")
elif covered:
dest.write("> ")
else:
dest.write("! ")
dest.write(line)
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