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1# Common utility functions used by various script execution tests
2#  e.g. test_cmd_line, test_cmd_line_script and test_runpy
3
4import sys
5import os
6import re
7import os.path
8import tempfile
9import subprocess
10import py_compile
11import contextlib
12import shutil
13try:
14    import zipfile
15except ImportError:
16    # If Python is build without Unicode support, importing _io will
17    # fail, which, in turn, means that zipfile cannot be imported
18    # Most of this module can then still be used.
19    pass
20
21from test.support import strip_python_stderr
22
23# Executing the interpreter in a subprocess
24def _assert_python(expected_success, *args, **env_vars):
25    cmd_line = [sys.executable]
26    if not env_vars:
27        cmd_line.append('-E')
28    cmd_line.extend(args)
29    # Need to preserve the original environment, for in-place testing of
30    # shared library builds.
31    env = os.environ.copy()
32    env.update(env_vars)
33    p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
34                         stdout=subprocess.PIPE, stderr=subprocess.PIPE,
35                         env=env)
36    try:
37        out, err = p.communicate()
38    finally:
39        subprocess._cleanup()
40        p.stdout.close()
41        p.stderr.close()
42    rc = p.returncode
43    err =  strip_python_stderr(err)
44    if (rc and expected_success) or (not rc and not expected_success):
45        raise AssertionError(
46            "Process return code is %d, "
47            "stderr follows:\n%s" % (rc, err.decode('ascii', 'ignore')))
48    return rc, out, err
49
50def assert_python_ok(*args, **env_vars):
51    """
52    Assert that running the interpreter with `args` and optional environment
53    variables `env_vars` is ok and return a (return code, stdout, stderr) tuple.
54    """
55    return _assert_python(True, *args, **env_vars)
56
57def assert_python_failure(*args, **env_vars):
58    """
59    Assert that running the interpreter with `args` and optional environment
60    variables `env_vars` fails and return a (return code, stdout, stderr) tuple.
61    """
62    return _assert_python(False, *args, **env_vars)
63
64def python_exit_code(*args):
65    cmd_line = [sys.executable, '-E']
66    cmd_line.extend(args)
67    with open(os.devnull, 'w') as devnull:
68        return subprocess.call(cmd_line, stdout=devnull,
69                                stderr=subprocess.STDOUT)
70
71def spawn_python(*args, **kwargs):
72    cmd_line = [sys.executable, '-E']
73    cmd_line.extend(args)
74    return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
75                            stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
76                            **kwargs)
77
78def kill_python(p):
79    p.stdin.close()
80    data = p.stdout.read()
81    p.stdout.close()
82    # try to cleanup the child so we don't appear to leak when running
83    # with regrtest -R.
84    p.wait()
85    subprocess._cleanup()
86    return data
87
88def run_python(*args, **kwargs):
89    if __debug__:
90        p = spawn_python(*args, **kwargs)
91    else:
92        p = spawn_python('-O', *args, **kwargs)
93    stdout_data = kill_python(p)
94    return p.wait(), stdout_data
95
96# Script creation utilities
97@contextlib.contextmanager
98def temp_dir():
99    dirname = tempfile.mkdtemp()
100    dirname = os.path.realpath(dirname)
101    try:
102        yield dirname
103    finally:
104        shutil.rmtree(dirname)
105
106def make_script(script_dir, script_basename, source):
107    script_filename = script_basename+os.extsep+'py'
108    script_name = os.path.join(script_dir, script_filename)
109    script_file = open(script_name, 'w')
110    script_file.write(source)
111    script_file.close()
112    return script_name
113
114def compile_script(script_name):
115    py_compile.compile(script_name, doraise=True)
116    if __debug__:
117        compiled_name = script_name + 'c'
118    else:
119        compiled_name = script_name + 'o'
120    return compiled_name
121
122def make_zip_script(zip_dir, zip_basename, script_name, name_in_zip=None):
123    zip_filename = zip_basename+os.extsep+'zip'
124    zip_name = os.path.join(zip_dir, zip_filename)
125    zip_file = zipfile.ZipFile(zip_name, 'w')
126    if name_in_zip is None:
127        name_in_zip = os.path.basename(script_name)
128    zip_file.write(script_name, name_in_zip)
129    zip_file.close()
130    #if test.test_support.verbose:
131    #    zip_file = zipfile.ZipFile(zip_name, 'r')
132    #    print 'Contents of %r:' % zip_name
133    #    zip_file.printdir()
134    #    zip_file.close()
135    return zip_name, os.path.join(zip_name, name_in_zip)
136
137def make_pkg(pkg_dir, init_source=''):
138    os.mkdir(pkg_dir)
139    make_script(pkg_dir, '__init__', init_source)
140
141def make_zip_pkg(zip_dir, zip_basename, pkg_name, script_basename,
142                 source, depth=1, compiled=False):
143    unlink = []
144    init_name = make_script(zip_dir, '__init__', '')
145    unlink.append(init_name)
146    init_basename = os.path.basename(init_name)
147    script_name = make_script(zip_dir, script_basename, source)
148    unlink.append(script_name)
149    if compiled:
150        init_name = compile_script(init_name)
151        script_name = compile_script(script_name)
152        unlink.extend((init_name, script_name))
153    pkg_names = [os.sep.join([pkg_name]*i) for i in range(1, depth+1)]
154    script_name_in_zip = os.path.join(pkg_names[-1], os.path.basename(script_name))
155    zip_filename = zip_basename+os.extsep+'zip'
156    zip_name = os.path.join(zip_dir, zip_filename)
157    zip_file = zipfile.ZipFile(zip_name, 'w')
158    for name in pkg_names:
159        init_name_in_zip = os.path.join(name, init_basename)
160        zip_file.write(init_name, init_name_in_zip)
161    zip_file.write(script_name, script_name_in_zip)
162    zip_file.close()
163    for name in unlink:
164        os.unlink(name)
165    #if test.test_support.verbose:
166    #    zip_file = zipfile.ZipFile(zip_name, 'r')
167    #    print 'Contents of %r:' % zip_name
168    #    zip_file.printdir()
169    #    zip_file.close()
170    return zip_name, os.path.join(zip_name, script_name_in_zip)
171