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annotate.py
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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_core 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)