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import os
import platform
import shutil
from ..subprocess_code_interpreter import SubprocessCodeInterpreter
class PowerShell(SubprocessCodeInterpreter):
file_extension = 'ps1'
proper_name = 'PowerShell'
def __init__(self):
super().__init__()
# Determine the start command based on the platform (use "powershell" for Windows)
if platform.system() == 'Windows':
self.start_cmd = 'powershell.exe'
# self.start_cmd = os.environ.get('SHELL', 'powershell.exe')
else:
# On non-Windows platforms, prefer pwsh (PowerShell Core) if available, or fall back to bash
self.start_cmd = 'pwsh' if shutil.which('pwsh') else 'bash'
def preprocess_code(self, code):
return preprocess_powershell(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_powershell(code):
"""
Add active line markers
Wrap in try-catch block
Add end of execution marker
"""
# Add commands that tell us what the active line is
code = add_active_line_prints(code)
# Wrap in try-catch block for error handling
code = wrap_in_try_catch(code)
# Add end marker (we'll be listening for this to know when it ends)
code += '\nWrite-Output "##end_of_execution##"'
return code
def add_active_line_prints(code):
"""
Add Write-Output statements indicating line numbers to a PowerShell script.
"""
lines = code.split('\n')
for index, line in enumerate(lines):
# Insert the Write-Output command before the actual line
lines[index] = f'Write-Output "##active_line{index + 1}##"\n{line}'
return '\n'.join(lines)
def wrap_in_try_catch(code):
"""
Wrap PowerShell code in a try-catch block to catch errors and display them.
"""
try_catch_code = """
try {
$ErrorActionPreference = "Stop"
"""
return try_catch_code + code + '\n} catch {\n Write-Error $_\n}\n'
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