我们从Python开源项目中，提取了以下18个代码示例，用于说明如何使用pexpect.which()。
def test_which_should_not_match_folders(self): " Which does not match folders, even though they are executable. " # make up a path and insert a folder that is 'executable', a naive # implementation might match (previously pexpect versions 3.2 and # sh versions 1.0.8, reported by @lcm337.) fname = 'g++' bin_dir = tempfile.mkdtemp() bin_dir2 = os.path.join(bin_dir, fname) save_path = os.environ['PATH'] try: os.environ['PATH'] = bin_dir os.mkdir(bin_dir2, 0o755) # should not be found because it is not executable *file*, # but rather, has the executable bit set, as a good folder # should -- it should not be returned because it fails isdir() exercise = pexpect.which(fname) assert exercise is None finally: # restore, os.environ['PATH'] = save_path # destroy scratch folders, for _dir in (bin_dir2, bin_dir,): if os.path.exists(_dir): os.rmdir(_dir)
def _find_cmd(cmd): """Find the full path to a command using which.""" path = sp.Popen(['/usr/bin/env', 'which', cmd], stdout=sp.PIPE, stderr=sp.PIPE).communicate()[0] return py3compat.bytes_to_str(path)
def sh(self): if self._sh is None: self._sh = pexpect.which('sh') if self._sh is None: raise OSError('"sh" shell not found') return self._sh
def test_which_finds_ls(self): " which() can find ls(1). " exercise = pexpect.which("ls") assert exercise is not None assert exercise.startswith('/')
def test_os_defpath_which(self): " which() finds an executable in $PATH and returns its abspath. " fname = 'cc' bin_dir = tempfile.mkdtemp() bin_path = os.path.join(bin_dir, fname) save_path = os.environ['PATH'] save_defpath = os.defpath try: # setup os.environ['PATH'] = '' os.defpath = bin_dir with open(bin_path, 'w') as fp: pass # given non-executable, os.chmod(bin_path, 0o400) # exercise absolute and relative, assert pexpect.which(bin_path) is None assert pexpect.which(fname) is None # given executable, os.chmod(bin_path, 0o700) # exercise absolute and relative, assert pexpect.which(bin_path) == bin_path assert pexpect.which(fname) == bin_path finally: # restore, os.environ['PATH'] = save_path os.defpath = save_defpath # destroy scratch files and folders, if os.path.exists(bin_path): os.unlink(bin_path) if os.path.exists(bin_dir): os.rmdir(bin_dir)
def test_path_search_which(self): " which() finds an executable in $PATH and returns its abspath. " fname = 'gcc' bin_dir = tempfile.mkdtemp() bin_path = os.path.join(bin_dir, fname) save_path = os.environ['PATH'] try: # setup os.environ['PATH'] = bin_dir with open(bin_path, 'w') as fp: pass # given non-executable, os.chmod(bin_path, 0o400) # exercise absolute and relative, assert pexpect.which(bin_path) is None assert pexpect.which(fname) is None # given executable, os.chmod(bin_path, 0o700) # exercise absolute and relative, assert pexpect.which(bin_path) == bin_path assert pexpect.which(fname) == bin_path finally: # restore, os.environ['PATH'] = save_path # destroy scratch files and folders, if os.path.exists(bin_path): os.unlink(bin_path) if os.path.exists(bin_dir): os.rmdir(bin_dir)
def test_which_follows_symlink(self): " which() follows symlinks and returns its path. " fname = 'original' symname = 'extra-crispy' bin_dir = tempfile.mkdtemp() bin_path = os.path.join(bin_dir, fname) sym_path = os.path.join(bin_dir, symname) save_path = os.environ['PATH'] try: # setup os.environ['PATH'] = bin_dir with open(bin_path, 'w') as fp: pass os.chmod(bin_path, 0o400) os.symlink(bin_path, sym_path) # should not be found because symlink points to non-executable assert pexpect.which(symname) is None # but now it should -- because it is executable os.chmod(bin_path, 0o700) assert pexpect.which(symname) == sym_path finally: # restore, os.environ['PATH'] = save_path # destroy scratch files, symlinks, and folders, if os.path.exists(sym_path): os.unlink(sym_path) if os.path.exists(bin_path): os.unlink(bin_path) if os.path.exists(bin_dir): os.rmdir(bin_dir)
