nathan wagner
b96310f621
it's returing valid attribute arrays, that just need converted on z2m side. it's also respecting the stop command from the console, which I will attempt to expose as just a button press.
311 lines
13 KiB
Python
311 lines
13 KiB
Python
# Adafruit MicroPython Tool - File Operations
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# Author: Tony DiCola
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# Copyright (c) 2016 Adafruit Industries
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import ast
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import textwrap
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from ampy.pyboard import PyboardError
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BUFFER_SIZE = 32 # Amount of data to read or write to the serial port at a time.
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# This is kept small because small chips and USB to serial
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# bridges usually have very small buffers.
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class DirectoryExistsError(Exception):
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pass
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class Files(object):
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"""Class to interact with a MicroPython board files over a serial connection.
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Provides functions for listing, uploading, and downloading files from the
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board's filesystem.
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"""
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def __init__(self, pyboard):
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"""Initialize the MicroPython board files class using the provided pyboard
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instance. In most cases you should create a Pyboard instance (from
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pyboard.py) which connects to a board over a serial connection and pass
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it in, but you can pass in other objects for testing, etc.
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"""
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self._pyboard = pyboard
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def get(self, filename):
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"""Retrieve the contents of the specified file and return its contents
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as a byte string.
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"""
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# Open the file and read it a few bytes at a time and print out the
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# raw bytes. Be careful not to overload the UART buffer so only write
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# a few bytes at a time, and don't use print since it adds newlines and
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# expects string data.
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command = """
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import sys
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with open('{0}', 'rb') as infile:
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while True:
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result = infile.read({1})
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if result == b'':
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break
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len = sys.stdout.write(result)
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""".format(
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filename, BUFFER_SIZE
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)
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self._pyboard.enter_raw_repl()
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try:
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out = self._pyboard.exec_(textwrap.dedent(command))
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except PyboardError as ex:
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# Check if this is an OSError #2, i.e. file doesn't exist and
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# rethrow it as something more descriptive.
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if ex.args[2].decode("utf-8").find("OSError: [Errno 2] ENOENT") != -1:
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raise RuntimeError("No such file: {0}".format(filename))
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else:
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raise ex
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self._pyboard.exit_raw_repl()
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return out
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def ls(self, directory="/", long_format=True, recursive=False):
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"""List the contents of the specified directory (or root if none is
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specified). Returns a list of strings with the names of files in the
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specified directory. If long_format is True then a list of 2-tuples
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with the name and size (in bytes) of the item is returned. Note that
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it appears the size of directories is not supported by MicroPython and
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will always return 0 (i.e. no recursive size computation).
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"""
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# Disabling for now, see https://github.com/adafruit/ampy/issues/55.
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# # Make sure directory ends in a slash.
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# if not directory.endswith("/"):
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# directory += "/"
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# Make sure directory starts with slash, for consistency.
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if not directory.startswith("/"):
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directory = "/" + directory
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command = """\
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try:
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import os
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except ImportError:
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import uos as os\n"""
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if recursive:
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command += """\
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def listdir(directory):
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result = set()
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def _listdir(dir_or_file):
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try:
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# if its a directory, then it should provide some children.
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children = os.listdir(dir_or_file)
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except OSError:
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# probably a file. run stat() to confirm.
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os.stat(dir_or_file)
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result.add(dir_or_file)
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else:
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# probably a directory, add to result if empty.
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if children:
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# queue the children to be dealt with in next iteration.
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for child in children:
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# create the full path.
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if dir_or_file == '/':
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next = dir_or_file + child
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else:
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next = dir_or_file + '/' + child
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_listdir(next)
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else:
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result.add(dir_or_file)
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_listdir(directory)
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return sorted(result)\n"""
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else:
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command += """\
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def listdir(directory):
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if directory == '/':
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return sorted([directory + f for f in os.listdir(directory)])
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else:
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return sorted([directory + '/' + f for f in os.listdir(directory)])\n"""
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# Execute os.listdir() command on the board.
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if long_format:
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command += """
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r = []
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for f in listdir('{0}'):
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size = os.stat(f)[6]
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r.append('{{0}} - {{1}} bytes'.format(f, size))
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print(r)
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""".format(
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directory
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)
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else:
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command += """
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print(listdir('{0}'))
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""".format(
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directory
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)
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self._pyboard.enter_raw_repl()
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try:
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out = self._pyboard.exec_(textwrap.dedent(command))
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except PyboardError as ex:
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# Check if this is an OSError #2, i.e. directory doesn't exist and
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# rethrow it as something more descriptive.
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if ex.args[2].decode("utf-8").find("OSError: [Errno 2] ENOENT") != -1:
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raise RuntimeError("No such directory: {0}".format(directory))
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else:
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raise ex
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self._pyboard.exit_raw_repl()
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# Parse the result list and return it.
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return ast.literal_eval(out.decode("utf-8"))
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def mkdir(self, directory, exists_okay=False):
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"""Create the specified directory. Note this cannot create a recursive
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hierarchy of directories, instead each one should be created separately.
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"""
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# Execute os.mkdir command on the board.
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command = """
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try:
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import os
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except ImportError:
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import uos as os
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os.mkdir('{0}')
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""".format(
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directory
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)
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self._pyboard.enter_raw_repl()
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try:
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out = self._pyboard.exec_(textwrap.dedent(command))
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except PyboardError as ex:
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# Check if this is an OSError #17, i.e. directory already exists.
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if ex.args[2].decode("utf-8").find("OSError: [Errno 17] EEXIST") != -1:
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if not exists_okay:
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raise DirectoryExistsError(
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"Directory already exists: {0}".format(directory)
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)
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else:
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raise ex
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self._pyboard.exit_raw_repl()
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def put(self, filename, data):
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"""Create or update the specified file with the provided data.
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"""
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# Open the file for writing on the board and write chunks of data.
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self._pyboard.enter_raw_repl()
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self._pyboard.exec_("f = open('{0}', 'wb')".format(filename))
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size = len(data)
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# Loop through and write a buffer size chunk of data at a time.
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for i in range(0, size, BUFFER_SIZE):
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chunk_size = min(BUFFER_SIZE, size - i)
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chunk = repr(data[i : i + chunk_size])
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# Make sure to send explicit byte strings (handles python 2 compatibility).
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if not chunk.startswith("b"):
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chunk = "b" + chunk
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self._pyboard.exec_("f.write({0})".format(chunk))
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self._pyboard.exec_("f.close()")
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self._pyboard.exit_raw_repl()
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def rm(self, filename):
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"""Remove the specified file or directory."""
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command = """
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try:
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import os
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except ImportError:
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import uos as os
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os.remove('{0}')
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""".format(
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filename
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)
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self._pyboard.enter_raw_repl()
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try:
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out = self._pyboard.exec_(textwrap.dedent(command))
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except PyboardError as ex:
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message = ex.args[2].decode("utf-8")
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# Check if this is an OSError #2, i.e. file/directory doesn't exist
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# and rethrow it as something more descriptive.
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if message.find("OSError: [Errno 2] ENOENT") != -1:
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raise RuntimeError("No such file/directory: {0}".format(filename))
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# Check for OSError #13, the directory isn't empty.
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if message.find("OSError: [Errno 13] EACCES") != -1:
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raise RuntimeError("Directory is not empty: {0}".format(filename))
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else:
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raise ex
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self._pyboard.exit_raw_repl()
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def rmdir(self, directory, missing_okay=False):
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"""Forcefully remove the specified directory and all its children."""
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# Build a script to walk an entire directory structure and delete every
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# file and subfolder. This is tricky because MicroPython has no os.walk
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# or similar function to walk folders, so this code does it manually
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# with recursion and changing directories. For each directory it lists
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# the files and deletes everything it can, i.e. all the files. Then
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# it lists the files again and assumes they are directories (since they
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# couldn't be deleted in the first pass) and recursively clears those
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# subdirectories. Finally when finished clearing all the children the
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# parent directory is deleted.
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command = """
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try:
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import os
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except ImportError:
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import uos as os
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def rmdir(directory):
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os.chdir(directory)
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for f in os.listdir():
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try:
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os.remove(f)
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except OSError:
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pass
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for f in os.listdir():
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rmdir(f)
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os.chdir('..')
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os.rmdir(directory)
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rmdir('{0}')
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""".format(
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directory
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)
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self._pyboard.enter_raw_repl()
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try:
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out = self._pyboard.exec_(textwrap.dedent(command))
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except PyboardError as ex:
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message = ex.args[2].decode("utf-8")
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# Check if this is an OSError #2, i.e. directory doesn't exist
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# and rethrow it as something more descriptive.
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if message.find("OSError: [Errno 2] ENOENT") != -1:
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if not missing_okay:
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raise RuntimeError("No such directory: {0}".format(directory))
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else:
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raise ex
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self._pyboard.exit_raw_repl()
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def run(self, filename, wait_output=True):
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"""Run the provided script and return its output. If wait_output is True
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(default) then wait for the script to finish and then print its output,
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otherwise just run the script and don't wait for any output.
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"""
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self._pyboard.enter_raw_repl()
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out = None
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if wait_output:
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# Run the file and wait for output to return.
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out = self._pyboard.execfile(filename)
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else:
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# Read the file and run it using lower level pyboard functions that
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# won't wait for it to finish or return output.
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with open(filename, "rb") as infile:
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self._pyboard.exec_raw_no_follow(infile.read())
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self._pyboard.exit_raw_repl()
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return out
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