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import platform |
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from contextlib import contextmanager |
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from subprocess import PIPE, Popen |
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from coalib.parsing.StringProcessing import escape |
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@contextmanager |
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def run_interactive_shell_command(command, **kwargs): |
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""" |
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Runs a command in shell and provides stdout, stderr and stdin streams. |
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This function creates a context manager that sets up the process, returns |
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to caller, closes streams and waits for process to exit on leaving. |
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The process is opened in `universal_newlines` mode. |
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:param command: The command to run on shell. |
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:param kwargs: Additional keyword arguments to pass to `subprocess.Popen` |
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that is used to spawn the process (except `shell`, |
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`stdout`, `stderr`, `stdin` and `universal_newlines`, a |
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`TypeError` is raised then). |
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:return: A context manager yielding the process started from the |
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command. |
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""" |
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process = Popen(command, |
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shell=True, |
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stdout=PIPE, |
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stderr=PIPE, |
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stdin=PIPE, |
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universal_newlines=True, |
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**kwargs) |
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try: |
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yield process |
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finally: |
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process.stdout.close() |
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process.stderr.close() |
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process.stdin.close() |
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process.wait() |
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def run_shell_command(command, stdin=None, **kwargs): |
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""" |
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Runs a command in shell and returns the read stdout and stderr data. |
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This function waits for the process to exit. |
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:param command: The command to run on shell. |
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:param stdin: Initial input to send to the process. |
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:param kwargs: Additional keyword arguments to pass to `subprocess.Popen` |
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that is used to spawn the process (except `shell`, |
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`stdout`, `stderr`, `stdin` and `universal_newlines`, a |
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`TypeError` is raised then). |
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:return: A tuple with `(stdoutstring, stderrstring)`. |
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""" |
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with run_interactive_shell_command(command, **kwargs) as p: |
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ret = p.communicate(stdin) |
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return ret |
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60
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61
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def get_shell_type(): # pragma: no cover |
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""" |
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Finds the current shell type based on the outputs of common pre-defined |
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variables in them. This is useful to identify which sort of escaping |
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is required for strings. |
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:return: The shell type. This can be either "powershell" if Windows |
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Powershell is detected, "cmd" if command prompt is been |
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detected or "sh" if it's neither of these. |
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""" |
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out_hostname, _ = run_shell_command(["echo", "$host.name"]) |
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if out_hostname.strip() == "ConsoleHost": |
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return "powershell" |
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out_0, _ = run_shell_command(["echo", "$0"]) |
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if out_0.strip() == "" and out_0.strip() == "": |
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return "cmd" |
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return "sh" |
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80
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def prepare_string_argument(string, shell=get_shell_type()): |
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""" |
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Prepares a string argument for being passed as a parameter on shell. |
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84
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On `sh` this function effectively encloses the given string |
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with quotes (either '' or "", depending on content). |
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:param string: The string to prepare for shell. |
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:param shell: The shell platform to prepare string argument for. |
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If it is not "sh" they will be ignored and return the |
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given string without modification. |
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:return: The shell-prepared string. |
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""" |
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if shell == "sh": |
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return '"' + escape(string, '"') + '"' |
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else: |
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return string |
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def escape_path_argument(path, shell=get_shell_type()): |
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""" |
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Makes a raw path ready for using as parameter in a shell command (escapes |
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illegal characters, surrounds with quotes etc.). |
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:param path: The path to make ready for shell. |
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:param shell: The shell platform to escape the path argument for. Possible |
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values are "sh", "powershell", and "cmd" (others will be |
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ignored and return the given path without modification). |
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:return: The escaped path argument. |
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""" |
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if shell == "cmd": |
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# If a quote (") occurs in path (which is illegal for NTFS file |
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# systems, but maybe for others), escape it by preceding it with |
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# a caret (^). |
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return '"' + escape(path, '"', '^') + '"' |
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elif shell == "sh": |
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return escape(path, " ") |
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else: |
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# Any other non-supported system doesn't get a path escape. |
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return path |
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coala-analyzer /
coala
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