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import os | |
import platform | |
import re | |
from ..subprocess_code_interpreter import SubprocessCodeInterpreter | |
class Shell(SubprocessCodeInterpreter): | |
file_extension = 'sh' | |
proper_name = 'Shell' | |
def __init__(self): | |
super().__init__() | |
# Determine the start command based on the platform | |
if platform.system() == 'Windows': | |
self.start_cmd = 'cmd.exe' | |
else: | |
self.start_cmd = os.environ.get('SHELL', 'bash') | |
def preprocess_code(self, code): | |
return preprocess_shell(code) | |
def line_postprocessor(self, line): | |
return line | |
def detect_active_line(self, line): | |
if '##active_line' in line: | |
return int(line.split('##active_line')[1].split('##')[0]) | |
return None | |
def detect_end_of_execution(self, line): | |
return '##end_of_execution##' in line | |
def preprocess_shell(code): | |
""" | |
Add active line markers | |
Wrap in a try except (trap in shell) | |
Add end of execution marker | |
""" | |
# Add commands that tell us what the active line is | |
# if it's multiline, just skip this. soon we should make it work with multiline | |
if not has_multiline_commands(code): | |
code = add_active_line_prints(code) | |
# Add end command (we'll be listening for this so we know when it ends) | |
code += '\necho "##end_of_execution##"' | |
return code | |
def add_active_line_prints(code): | |
""" | |
Add echo statements indicating line numbers to a shell string. | |
""" | |
lines = code.split('\n') | |
for index, line in enumerate(lines): | |
# Insert the echo command before the actual line | |
lines[index] = f'echo "##active_line{index + 1}##"\n{line}' | |
return '\n'.join(lines) | |
def has_multiline_commands(script_text): | |
# Patterns that indicate a line continues | |
continuation_patterns = [ | |
r'\\$', # Line continuation character at the end of the line | |
r'\|$', # Pipe character at the end of the line indicating a pipeline continuation | |
r'&&\s*$', # Logical AND at the end of the line | |
r'\|\|\s*$', # Logical OR at the end of the line | |
r'<\($', # Start of process substitution | |
r'\($', # Start of subshell | |
r'{\s*$', # Start of a block | |
r'\bif\b', # Start of an if statement | |
r'\bwhile\b', # Start of a while loop | |
r'\bfor\b', # Start of a for loop | |
r'do\s*$', # 'do' keyword for loops | |
r'then\s*$', # 'then' keyword for if statements | |
] | |
# Check each line for multiline patterns | |
for line in script_text.splitlines(): | |
if any( | |
re.search(pattern, line.rstrip()) | |
for pattern in continuation_patterns): | |
return True | |
return False | |