def get_settings_value(definitions: Definitions, setting_name: str):
"""Get a Mathics Settings` value with name "setting_name" from definitions. If setting_name is not defined return None"""
settings_value = definitions.get_ownvalue(setting_name)
if settings_value is None:
return None
return settings_value.replace.to_python(string_quotes=False)
def main(
full_form,
persist,
quiet,
readline,
completion,
unicode,
prompt,
pyextensions,
execute,
run,
style,
pygments_tokens,
strict_wl_output,
file,
) -> int:
"""A command-line interface to Mathics.
Mathics is a general-purpose computer algebra system
"""
exit_rc = 0
quit_command = "CTRL-BREAK" if sys.platform == "win32" else "CONTROL-D"
extension_modules = []
if pyextensions:
for ext in pyextensions:
extension_modules.append(ext)
definitions = Definitions(add_builtin=True)
definitions.set_line_no(0)
# Set a default value for $ShowFullFormInput to False.
# Then, it can be changed by the settings file (in WL)
# and overwritten by the command line parameter.
definitions.set_ownvalue(
"Settings`$ShowFullFormInput", from_python(True if full_form else False)
)
definitions.set_ownvalue(
"Settings`$PygmentsShowTokens", from_python(True if pygments_tokens else False)
)
readline = "none" if (execute or file and not persist) else readline.lower()
if readline == "prompt":
shell = TerminalShellPromptToolKit(
definitions, style, completion, unicode, prompt
)
else:
want_readline = readline == "gnu"
shell = TerminalShellGNUReadline(
definitions, style, want_readline, completion, unicode, prompt
)
load_settings(shell)
if run:
with open(run, "r") as ifile:
feeder = MathicsFileLineFeeder(ifile)
try:
while not feeder.empty():
evaluation = Evaluation(
shell.definitions,
output=TerminalOutput(shell),
catch_interrupt=False,
format="text",
)
query = evaluation.parse_feeder(feeder)
if query is None:
continue
evaluation.evaluate(query, timeout=settings.TIMEOUT)
except (KeyboardInterrupt):
print("\nKeyboardInterrupt")
definitions.set_line_no(0)
if execute:
for expr in execute:
evaluation = Evaluation(
shell.definitions, output=TerminalOutput(shell), format="text"
)
shell.terminal_formatter = None
result = evaluation.parse_evaluate(expr, timeout=settings.TIMEOUT)
shell.print_result(result, prompt, "text", strict_wl_output)
# After the next release, we can remove the hasattr test.
if hasattr(evaluation, "exc_result"):
if evaluation.exc_result == Symbol("Null"):
exit_rc = 0
elif evaluation.exc_result == Symbol("$Aborted"):
exit_rc = -1
elif evaluation.exc_result == Symbol("Overflow"):
exit_rc = -2
else:
exit_rc = -3
if not persist:
return exit_rc
if file is not None:
with open(file, "r") as ifile:
feeder = MathicsFileLineFeeder(ifile)
try:
while not feeder.empty():
evaluation = Evaluation(
shell.definitions,
output=TerminalOutput(shell),
catch_interrupt=False,
format="text",
)
query = evaluation.parse_feeder(feeder)
if query is None:
continue
evaluation.evaluate(query, timeout=settings.TIMEOUT)
except (KeyboardInterrupt):
print("\nKeyboardInterrupt")
if not persist:
return exit_rc
if not quiet and prompt:
print(f"\nMathicscript: {__version__}, {version_string}\n")
print(license_string + "\n")
print(f"Quit by evaluating Quit[] or by pressing {quit_command}.\n")
# If defined, full_form and style overwrite the predefined values.
definitions.set_ownvalue(
"Settings`$ShowFullFormInput", SymbolTrue if full_form else SymbolFalse
)
definitions.set_ownvalue(
"Settings`$PygmentsStyle", from_python(shell.pygments_style)
)
definitions.set_ownvalue(
"Settings`$PygmentsShowTokens", from_python(pygments_tokens)
)
definitions.set_ownvalue("Settings`MathicsScriptVersion", from_python(__version__))
definitions.set_attribute("Settings`MathicsScriptVersion", "System`Protected")
definitions.set_attribute("Settings`MathicsScriptVersion", "System`Locked")
TeXForm = Symbol("System`TeXForm")
definitions.set_line_no(0)
while True:
try:
if have_readline and shell.using_readline:
import readline as GNU_readline
last_pos = GNU_readline.get_current_history_length()
full_form = definitions.get_ownvalue(
"Settings`$ShowFullFormInput"
).replace.to_python()
style = definitions.get_ownvalue("Settings`$PygmentsStyle")
fmt = lambda x: x
if style:
style = style.replace.get_string_value()
if shell.terminal_formatter:
fmt = lambda x: highlight(
str(query), mma_lexer, shell.terminal_formatter
)
evaluation = Evaluation(shell.definitions, output=TerminalOutput(shell))
query, source_code = evaluation.parse_feeder_returning_code(shell)
if (
have_readline
and shell.using_readline
and hasattr(GNU_readline, "remove_history_item")
):
current_pos = GNU_readline.get_current_history_length()
for pos in range(last_pos, current_pos - 1):
GNU_readline.remove_history_item(pos)
wl_input = source_code.rstrip()
if unicode:
wl_input = replace_wl_with_plain_text(wl_input)
GNU_readline.add_history(wl_input)
if query is None:
continue
if hasattr(query, "head") and query.head == TeXForm:
output_style = "//TeXForm"
else:
output_style = ""
if full_form:
print(fmt(query))
result = evaluation.evaluate(
query, timeout=settings.TIMEOUT, format="unformatted"
)
if result is not None:
shell.print_result(
result, prompt, output_style, strict_wl_output=strict_wl_output
)
except ShellEscapeException as e:
source_code = e.line
if len(source_code) and source_code[1] == "!":
try:
print(open(source_code[2:], "r").read())
except:
print(str(sys.exc_info()[1]))
else:
subprocess.run(source_code[1:], shell=True)
# Should we test exit code for adding to history?
GNU_readline.add_history(source_code.rstrip())
# FIXME add this... when in Mathics core updated
# shell.defintions.increment_line(1)
except (KeyboardInterrupt):
print("\nKeyboardInterrupt")
except EOFError:
if prompt:
print("\n\nGoodbye!\n")
break
except SystemExit:
print("\n\nGoodbye!\n")
# raise to pass the error code on, e.g. Quit[1]
raise
finally:
# Reset the input line that would be shown in a parse error.
# This is not to be confused with the number of complete
# inputs that have been seen, i.e. In[]
shell.reset_lineno()
return exit_rc
