In Python, when running shutil.rmtree over a folder that contains a read-only file, the following exception is printed:
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 216, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "C:\Python26\lib\shutil.py", line 221, in rmtree
onerror(os.remove, fullname, sys.exc_info())
File "C:\Python26\lib\shutil.py", line 219, in rmtree
os.remove(fullname)
WindowsError: [Error 5] Access is denied: 'build\\tcl\\tcl8.5\\msgs\\af.msg'
Looking in File Properties dialog I noticed that af.msg file is set to be read-only.
So the question is: what is the simplest workaround/fix to get around this problem - given that my intention is to do an equivalent of rm -rf build/ but on Windows? (without having to use third-party tools like unxutils or cygwin - as this code is targeted to be run on a bare Windows install with Python 2.6 w/ PyWin32 installed)
Check this question out:
What user do python scripts run as in windows?
Apparently the answer is to change the file/folder to not be read-only and then remove it.
Here's onerror() handler from pathutils.py mentioned by @Sridhar Ratnakumar in comments:
def onerror(func, path, exc_info):
"""
Error handler for ``shutil.rmtree``.
If the error is due to an access error (read only file)
it attempts to add write permission and then retries.
If the error is for another reason it re-raises the error.
Usage : ``shutil.rmtree(path, onerror=onerror)``
"""
import stat
if not os.access(path, os.W_OK):
# Is the error an access error ?
os.chmod(path, stat.S_IWUSR)
func(path)
else:
raise
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