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97 lines
3.2 KiB
Python
97 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 Matt Martz <matt@sivel.net>
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# Copyright (C) 2015 Rackspace US, Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import ast
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import sys
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# We only use StringIO, since we cannot setattr on cStringIO
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from StringIO import StringIO
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import yaml
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import yaml.reader
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def find_globals(g, tree):
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"""Uses AST to find globals in an ast tree"""
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for child in tree:
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if hasattr(child, 'body') and isinstance(child.body, list):
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find_globals(g, child.body)
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elif isinstance(child, (ast.FunctionDef, ast.ClassDef)):
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g.add(child.name)
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continue
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elif isinstance(child, ast.Assign):
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try:
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g.add(child.targets[0].id)
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except (IndexError, AttributeError):
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pass
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elif isinstance(child, ast.Import):
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g.add(child.names[0].name)
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elif isinstance(child, ast.ImportFrom):
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for name in child.names:
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g_name = name.asname or name.name
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if g_name == '*':
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continue
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g.add(g_name)
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class CaptureStd():
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"""Context manager to handle capturing stderr and stdout"""
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def __enter__(self):
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self.sys_stdout = sys.stdout
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self.sys_stderr = sys.stderr
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sys.stdout = self.stdout = StringIO()
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sys.stderr = self.stderr = StringIO()
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setattr(sys.stdout, 'encoding', self.sys_stdout.encoding)
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setattr(sys.stderr, 'encoding', self.sys_stderr.encoding)
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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sys.stdout = self.sys_stdout
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sys.stderr = self.sys_stderr
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def get(self):
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"""Return ``(stdout, stderr)``"""
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return self.stdout.getvalue(), self.stderr.getvalue()
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def parse_yaml(value, lineno, module, name):
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traces = []
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errors = []
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data = None
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try:
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data = yaml.safe_load(value)
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except yaml.MarkedYAMLError as e:
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e.problem_mark.line += lineno - 1
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e.problem_mark.name = '%s.%s' % (module, name)
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errors.append('%s is not valid YAML. Line %d column %d' %
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(name, e.problem_mark.line + 1,
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e.problem_mark.column + 1))
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traces.append(e)
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except yaml.reader.ReaderError as e:
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traces.append(e)
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errors.append('%s is not valid YAML. Character '
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'0x%x at position %d.' %
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(name, e.character, e.position))
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except yaml.YAMLError as e:
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traces.append(e)
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errors.append('%s is not valid YAML: %s: %s' % (name, type(e), e))
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return data, errors, traces
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