def call_with_import(module_name, extra_argv=[], assert_result=True):
"""Import module_name and run module.main() with given argv, capturing output."""
pytest.register_assert_rewrite(py_str(module_name))
print("import", module_name, "with extra_argv=" + repr(extra_argv))
old_stdout, sys.stdout = sys.stdout, LoggingStringIO(sys.stdout)
old_stderr, sys.stderr = sys.stderr, LoggingStringIO(sys.stderr)
old_argv = sys.argv
try:
with using_coconut():
if sys.version_info >= (2, 7):
module = importlib.import_module(module_name)
else:
module = imp.load_module(module_name,
*imp.find_module(module_name))
sys.argv = [module.__file__] + extra_argv
result = module.main()
if assert_result:
assert result
except SystemExit as err:
retcode = err.code or 0
except BaseException:
logger.print_exc()
retcode = 1
else:
retcode = 0
finally:
sys.argv = old_argv
stdout = sys.stdout.getvalue()
stderr = sys.stderr.getvalue()
sys.stdout = old_stdout
sys.stderr = old_stderr
return stdout, stderr, retcode
def cache(self, code, *args, **kwargs):
"""Version of cache that compiles Coconut code first."""
try:
compiled = memoized_parse_block(code)
except CoconutException:
logger.print_exc()
return None
else:
return super(CoconutCompiler, self).cache(compiled, *args, **kwargs)
def rm_path(path):
"""Delete a path."""
if os.path.isdir(path):
try:
shutil.rmtree(path)
except OSError:
logger.print_exc()
elif os.path.isfile(path):
os.remove(path)
def using_path(path):
"""Removes a path at the beginning and end."""
if os.path.exists(path):
rm_path(path)
try:
yield
finally:
try:
rm_path(path)
except OSError:
logger.print_exc()
def handles_prompt_toolkit_errors_func(self, *args, **kwargs):
if self.style is not None:
try:
return func(self, *args, **kwargs)
except (KeyboardInterrupt, EOFError):
raise
except (Exception, AssertionError):
logger.print_exc()
logger.show("Syntax highlighting failed; switching to --style none.")
self.style = None
return func(self, *args, **kwargs)
def mypy_run(args):
"""Run mypy with given arguments and return the result."""
logger.log_cmd(["mypy"] + args)
try:
stdout, stderr, exit_code = run(args)
except BaseException:
logger.print_exc()
else:
for line in stdout.splitlines():
yield line, False
for line in stderr.splitlines():
yield line, True
def handling_exceptions(self):
"""Performs proper exception handling."""
try:
with handling_broken_process_pool():
yield
except SystemExit as err:
self.register_error(err.code)
except BaseException as err:
if isinstance(err, CoconutException):
logger.print_exc()
elif not isinstance(err, KeyboardInterrupt):
traceback.print_exc()
self.register_error(errmsg=err.__class__.__name__)
def handling_exceptions(self):
"""Performs proper exception handling."""
try:
with handling_broken_process_pool():
yield
except SystemExit as err:
self.register_error(err.code)
except BaseException as err:
if isinstance(err, CoconutException):
logger.print_exc()
elif not isinstance(err, KeyboardInterrupt):
traceback.print_exc()
self.register_error(errmsg=err.__class__.__name__)
def using_dest(dest=dest):
"""Makes and removes the dest folder."""
try:
os.mkdir(dest)
except Exception:
rm_path(dest)
os.mkdir(dest)
try:
yield
finally:
try:
rm_path(dest)
except OSError:
logger.print_exc()
def do_complete(self, code, cursor_pos):
# first try with Jedi completions
self.use_experimental_completions = True
try:
return super(CoconutKernel, self).do_complete(code, cursor_pos)
except Exception:
logger.print_exc()
logger.warn_err(CoconutInternalException("experimental IPython completion failed, defaulting to shell completion"), force=True)
# then if that fails default to shell completions
self.use_experimental_completions = False
try:
return super(CoconutKernel, self).do_complete(code, cursor_pos)
finally:
self.use_experimental_completions = True
def magic(line, cell=None):
"""Provides %coconut and %%coconut magics."""
try:
if cell is None:
code = line
else:
# first line in block is cmd, rest is code
line = line.strip()
if line:
cmd(line)
code = cell
compiled = parse(code)
except CoconutException:
logger.print_exc()
else:
ipython.run_cell(compiled, shell_futures=False)
def magic(line, cell=None):
"""Provides %coconut and %%coconut magics."""
try:
if cell is None:
code = line
else:
# first line in block is cmd, rest is code
line = line.strip()
if line:
cmd(line, interact=False)
code = cell
compiled = parse(code)
except CoconutException:
logger.print_exc()
else:
ipython.run_cell(compiled, shell_futures=False)
def input(self, more=False):
"""Prompt for code input."""
sys.stdout.flush()
if more:
msg = more_prompt
else:
msg = main_prompt
if self.style is not None:
internal_assert(prompt_toolkit is not None,
"without prompt_toolkit cannot highlight style",
self.style)
try:
return self.prompt(msg)
except EOFError:
raise # issubclass(EOFError, Exception), so we have to do this
except (Exception, AssertionError):
logger.print_exc()
logger.show_sig(
"Syntax highlighting failed; switching to --style none.")
self.style = None
return input(msg)
def handle_input(self, code):
"""Compiles Coconut interpreter input."""
if not self.prompt.multiline:
if not should_indent(code):
try:
return self.comp.parse_block(code)
except CoconutException:
pass
while True:
line = self.get_input(more=True)
if line is None:
return None
elif line:
code += "\n" + line
else:
break
try:
return self.comp.parse_block(code)
except CoconutException:
logger.print_exc()
return None
def handle_input(self, code):
"""Compiles Coconut interpreter input."""
if not self.prompt.multiline:
if not should_indent(code):
try:
return self.comp.parse_block(code)
except CoconutException:
pass
while True:
line = self.get_input(more=True)
if line is None:
return None
elif line:
code += "\n" + line
else:
break
try:
return self.comp.parse_block(code)
except CoconutException:
logger.print_exc()
return None
def input(self, more=False):
"""Prompts for code input."""
sys.stdout.flush()
if more:
msg = more_prompt
else:
msg = main_prompt
if self.style is not None:
if prompt_toolkit is None:
raise CoconutInternalException(
"cannot highlight style without prompt_toolkit",
self.style)
try:
return prompt_toolkit.prompt(msg, **self.prompt_kwargs())
except EOFError:
raise # issubclass(EOFError, Exception), so we have to do this
except Exception:
logger.print_exc()
logger.show(
"Syntax highlighting failed; switching to --style none.")
self.style = None
return input(msg)
def evaluate(self):
"""Get the result of evaluating the computation graph at this node."""
if DEVELOP:
internal_assert(not self.been_called, "inefficient reevaluation of action " + self.name + " with tokens", self.tokens)
self.been_called = True
evaluated_toks = evaluate_tokens(self.tokens)
if logger.tracing: # avoid the overhead of the call if not tracing
logger.log_trace(self.name, self.original, self.loc, evaluated_toks, self.tokens)
try:
return _trim_arity(self.action)(
self.original,
self.loc,
evaluated_toks,
)
except CoconutException:
raise
except (Exception, AssertionError):
logger.print_exc()
error = CoconutInternalException("error computing action " + self.name + " of evaluated tokens", evaluated_toks)
if embed_on_internal_exc:
logger.warn_err(error)
embed(depth=2)
else:
raise error
