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import subprocess |
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import tempfile |
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import re |
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import sys |
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from coalib.misc.Shell import escape_path_argument |
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from coalib.results.Result import Result |
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from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY |
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class Lint(): |
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""" |
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:param executable: The executable to run the linter. |
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:param arguments: The arguments to supply to the linter, such |
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that the file name to be analyzed can be |
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appended to the end. |
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:param output_regex: The regex which will match the output of the linter |
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to get results. Thie regex should give out the |
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following variables: |
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line - The line where the issue starts. |
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column - The column where the issue starts. |
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end_line - The line where the issue ends. |
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end_column - The column where the issue ends. |
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severity - The severity of the issue. |
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message - The message of the result. |
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:param use_stderr: Uses stderr as the output stream is it's True. |
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:param severity_map: A dict where the keys are the possible severity |
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values the Linter gives out and the values are the |
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severity of the coala Result to set it to. If it is |
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not a dict, it is ignored. |
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""" |
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executable = None |
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arguments = "" |
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output_regex = re.compile(r'(?P<line>\d+)\.(?P<column>\d+)\|' |
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r'(?P<severity>\d+): (?P<message>.*)') |
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use_stderr = False |
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severity_map = None |
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def lint(self, filename): |
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""" |
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Takes a file and lints it using the linter variables defined apriori. |
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:param filename: The name of the file to execute. |
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""" |
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command = (self.executable + ' ' + self.arguments + ' ' |
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+ escape_path_argument(filename)) |
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stderr_file = tempfile.TemporaryFile() |
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stdout_file = tempfile.TemporaryFile() |
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process = subprocess.Popen( |
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command, |
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shell=True, |
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stdout=stdout_file, |
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stderr=stderr_file, |
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universal_newlines=True) |
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process.wait() |
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if self.use_stderr: |
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stderr_file.seek(0) |
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output = stderr_file.read().decode(sys.stdout.encoding, |
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errors="replace") |
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else: |
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stdout_file.seek(0) |
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output = stdout_file.read().decode(sys.stdout.encoding, |
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errors="replace") |
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stdout_file.close() |
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stderr_file.close() |
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return self.process_output(output, filename) |
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def process_output(self, output, filename): |
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regex = self.output_regex |
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if isinstance(regex, str): |
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regex = regex % {"file_name": filename} |
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for match in re.finditer(regex, output): |
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yield self.match_to_result(match, filename) |
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def _get_groupdict(self, match): |
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groups = match.groupdict() |
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if ( |
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isinstance(self.severity_map, dict) and |
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"severity" in groups and |
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groups["severity"] in self.severity_map): |
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groups["severity"] = self.severity_map[groups["severity"]] |
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return groups |
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def match_to_result(self, match, filename): |
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""" |
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Converts a regex match's groups into a result. |
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:param match: The match got from regex parsing. |
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:param filename: The name of the file from which this match is got. |
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""" |
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groups = self._get_groupdict(match) |
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# Pre process the groups |
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for variable in ("line", "column", "end_line", "end_column"): |
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if variable in groups: |
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groups[variable] = int(groups[variable]) |
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return Result.from_values( |
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origin=self, |
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message=groups.get("message", ""), |
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file=filename, |
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severity=int(groups.get("severity", RESULT_SEVERITY.NORMAL)), |
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line=groups.get("line", None), |
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column=groups.get("column", None), |
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end_line=groups.get("end_line", None), |
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end_column=groups.get("end_column", None)) |
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coala-analyzer /
coala
