133 lines
4.2 KiB
Python
133 lines
4.2 KiB
Python
"""
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Path related functions
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"""
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import logging
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import os
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import re
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import sys
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from datetime import datetime
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from shutil import move
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logger = logging.getLogger('default')
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# When using py2exe or py2app, the variable frozen is added to the sys
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# namespace. This can be used to setup a different code path for
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# binary distributions vs source distributions.
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frozen = getattr(sys, 'frozen', None)
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def lookupExeFolder():
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"""Returns executable folder path"""
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if frozen:
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exeFolder = (
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# targetdir/Bitmessage.app/Contents/MacOS/Bitmessage
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os.path.dirname(sys.executable).split(os.path.sep)[0] + os.path.sep
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if frozen == "macosx_app" else
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os.path.dirname(sys.executable) + os.path.sep)
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elif __file__:
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exeFolder = os.path.dirname(__file__) + os.path.sep
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else:
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exeFolder = ''
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return exeFolder
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def lookupAppdataFolder():
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"""Returns path of the folder where application data is stored"""
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APPNAME = "PyBitmessage"
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dataFolder = os.environ.get('BITMESSAGE_HOME')
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if dataFolder:
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if dataFolder[-1] not in (os.path.sep, os.path.altsep):
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dataFolder += os.path.sep
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elif sys.platform == 'darwin':
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try:
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dataFolder = os.path.join(
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os.environ['HOME'],
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'Library/Application Support/', APPNAME
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) + '/'
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except KeyError:
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sys.exit(
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'Could not find home folder, please report this message'
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' and your OS X version to the BitMessage Github.')
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elif 'win32' in sys.platform or 'win64' in sys.platform:
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dataFolder = os.path.join(
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os.environ['APPDATA'].decode(
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sys.getfilesystemencoding(), 'ignore'), APPNAME
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) + os.path.sep
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else:
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try:
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dataFolder = os.path.join(os.environ['XDG_CONFIG_HOME'], APPNAME)
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except KeyError:
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dataFolder = os.path.join(os.environ['HOME'], '.config', APPNAME)
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# Migrate existing data to the proper location
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# if this is an existing install
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try:
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move(os.path.join(os.environ['HOME'], '.%s' % APPNAME), dataFolder)
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logger.info('Moving data folder to %s', dataFolder)
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except IOError:
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# Old directory may not exist.
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pass
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dataFolder = dataFolder + os.path.sep
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return dataFolder
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def codePath():
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"""Returns path to the program sources"""
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if not frozen:
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return os.path.dirname(__file__)
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return (
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os.environ.get('RESOURCEPATH')
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# pylint: disable=protected-access
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if frozen == "macosx_app" else sys._MEIPASS)
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def tail(f, lines=20):
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"""Returns last lines in the f file object"""
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total_lines_wanted = lines
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BLOCK_SIZE = 1024
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f.seek(0, 2)
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block_end_byte = f.tell()
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lines_to_go = total_lines_wanted
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block_number = -1
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# blocks of size BLOCK_SIZE, in reverse order starting
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# from the end of the file
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blocks = []
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while lines_to_go > 0 and block_end_byte > 0:
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if block_end_byte - BLOCK_SIZE > 0:
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# read the last block we haven't yet read
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f.seek(block_number * BLOCK_SIZE, 2)
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blocks.append(f.read(BLOCK_SIZE))
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else:
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# file too small, start from begining
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f.seek(0, 0)
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# only read what was not read
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blocks.append(f.read(block_end_byte))
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lines_found = blocks[-1].count('\n')
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lines_to_go -= lines_found
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block_end_byte -= BLOCK_SIZE
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block_number -= 1
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all_read_text = ''.join(reversed(blocks))
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return '\n'.join(all_read_text.splitlines()[-total_lines_wanted:])
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def lastCommit():
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"""
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Returns last commit information as dict with 'commit' and 'time' keys
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"""
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githeadfile = os.path.join(codePath(), '..', '.git', 'logs', 'HEAD')
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result = {}
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if os.path.isfile(githeadfile):
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try:
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with open(githeadfile, 'rt') as githead:
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line = tail(githead, 1)
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result['commit'] = line.split()[1]
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result['time'] = datetime.fromtimestamp(
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float(re.search(r'>\s*(.*?)\s', line).group(1))
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)
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except (IOError, AttributeError, TypeError):
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pass
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return result
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