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https://github.com/cheat/cheat.git
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In response to Issue #108: Added option to copy sheet while not editable.
This commit is contained in:
0rax
parent
b6e73539bd
commit
fc4b047958
87
cheat
87
cheat
@ -3,7 +3,7 @@
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cheat.py -- cheat allows you to create and view interactive cheatsheets on the
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command-line. It was designed to help remind *nix system
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administrators of options for commands that they use frequently,
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but not frequently enough to remember.
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but not frequently enough to remember.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -25,9 +25,9 @@ import argparse
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import subprocess
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from textwrap import dedent
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DEFAULT_CHEAT_DIR = os.environ.get('DEFAULT_CHEAT_DIR') or \
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os.path.join(os.path.expanduser('~'), '.cheat')
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USE_PYGMENTS = False
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DEFAULT_CHEAT_DIR = (os.environ.get('DEFAULT_CHEAT_DIR') or
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os.path.join(os.path.expanduser('~'), '.cheat'))
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USE_PYGMENTS = False
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# NOTE remove this check if it is confirmed to work on windows
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if os.name == 'posix' and 'CHEATCOLORS' in os.environ:
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@ -40,8 +40,9 @@ if os.name == 'posix' and 'CHEATCOLORS' in os.environ:
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except ImportError:
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pass
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def pretty_print(filename):
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"Applies syntax highlighting to a cheatsheet and writes it to stdout"
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"""Applies syntax highlighting to a cheatsheet and writes it to stdout"""
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try:
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if os.path.splitext(filename)[1]:
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lexer = get_lexer_for_filename(filename)
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@ -58,8 +59,9 @@ def pretty_print(filename):
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fmt = TerminalFormatter()
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highlight(code, lexer, fmt, sys.stdout)
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class CheatSheets(object):
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dirs = None
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sheets = None
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@ -67,7 +69,8 @@ class CheatSheets(object):
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self.dirs = self.__cheat_directories()
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# verify that we have at least one cheat directory
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if not self.dirs:
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error_msg = 'The {default} dir does not exist or the CHEATPATH var is not set.'
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error_msg = ('The {default} dir does not exist'
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' or the CHEATPATH var is not set.')
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print >> sys.stderr, error_msg.format(default=DEFAULT_CHEAT_DIR)
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exit(1)
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self.sheets = self.__cheat_files()
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@ -91,7 +94,9 @@ class CheatSheets(object):
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return default
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def __cheat_files(self):
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"""Assembles a dictionary of cheatsheets found in the above directories."""
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"""
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Assembles a dictionary of cheatsheets found in the above directories.
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"""
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cheats = {}
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for cheat_dir in reversed(self.dirs):
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cheats.update(dict([(cheat, cheat_dir)
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@ -103,37 +108,64 @@ class CheatSheets(object):
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def edit(self, cheat):
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"""Creates or edits a cheatsheet"""
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# Assert that the EDITOR environment variable is set and that at least 3
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# arguments have been given
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# Assert that the EDITOR environment variable is set and that at least
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# 3 arguments have been given
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if 'EDITOR' not in os.environ:
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print >> sys.stderr, ('In order to create/edit a cheatsheet you '
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'must set your EDITOR environment variable to your favorite '
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'editor\'s path.')
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'must set your EDITOR environment variable '
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'to your favorite editor\'s path.')
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exit(1)
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elif os.environ['EDITOR'] == "":
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print >> sys.stderr, ('Your EDITOR environment variable is set '
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'to nothing, in order to create/edit a cheatsheet your must '
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'set it to a valid editor\'s path.')
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'to nothing, in order to create/edit a '
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'cheatsheet your must set it to a valid '
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'editor\'s path.')
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exit(1)
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else:
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editor = os.environ['EDITOR'].split()
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# if the cheatsheet already exists, open it for editing
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try:
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if cheat in sheets.sheets:
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subprocess.call(editor + [os.path.join(self.sheets[cheat], cheat)])
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if cheat in self.sheets:
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sheet_path = os.path.join(self.sheets[cheat], cheat)
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if os.access(sheet_path, os.W_OK):
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subprocess.call(editor + [sheet_path])
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else:
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print >> sys.stderr, ("Sheet '%s' [%s] is not editable."
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% (cheat, sheet_path))
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print ('Do you want to '
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'copy it to your user cheatsheets directory [%s] '
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'before editing ?\nKeep in mind that your sheet '
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'will always be used before system-wide one.'
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% DEFAULT_CHEAT_DIR)
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awn = raw_input('[y/n] ')
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if awn != 'y':
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print ('Ok, if you want to edit system-wide sheet, '
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'please try `cheat -e <cheatsheet>` '
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'again with sudo.')
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exit(1)
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import shutil
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new_sheet = os.path.join(DEFAULT_CHEAT_DIR, cheat)
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shutil.copy(sheet_path, new_sheet)
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subprocess.call(editor + [new_sheet])
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# otherwise, create it
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else:
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import cheatsheets as cs
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# Attempt to write the new cheatsheet to the user's ~/.cheat dir if it
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# exists. If it does not exist, attempt to create it.
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# Attempt to write the new cheatsheet to the user's ~/.cheat
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# dir if it exists. If it does not exist, attempt to create it.
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if os.access(DEFAULT_CHEAT_DIR, os.W_OK) or os.makedirs(DEFAULT_CHEAT_DIR):
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subprocess.call(editor + [os.path.join(DEFAULT_CHEAT_DIR, cheat)])
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# If the directory cannot be created, write to the python package
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# directory, though that will likely require the use of sudo
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# If the directory cannot be created, write to the python
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# package directory, though that will likely require the use
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# of sudo
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else:
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subprocess.call(editor + [os.path.join(cs.cheat_dir, cheat)])
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if os.access(sheet_path, os.W_OK):
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subprocess.call(editor + [os.path.join(cs.cheat_dir, cheat)])
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else:
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print >> sys.stderr, ("Couldn't create '%s' cheatsheet."
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% cheat)
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exit(1)
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except OSError, e:
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print >> sys.stderr, ("Could not launch `%s` as your editor : %s"
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% (editor[0], e.strerror))
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@ -145,6 +177,7 @@ class CheatSheets(object):
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return ('\n'.join(sorted(['%s [%s]' % (key.ljust(max_command), value)
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for key, value in self.sheets.items()])))
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# Custom action for argparse
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class ListDirectories(argparse.Action):
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"""List cheat directories and exit"""
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@ -152,18 +185,21 @@ class ListDirectories(argparse.Action):
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print("\n".join(sheets.dirs))
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parser.exit()
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class ListCheatsheets(argparse.Action):
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"""List cheatsheets and exit"""
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def __call__(self, parser, namespace, values, option_string=None):
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print sheets.list()
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parser.exit()
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class EditSheet(argparse.Action):
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"""If the user wants to edit a cheatsheet"""
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def __call__(self, parser, namespace, values, option_string=None):
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sheets.edit(values[0])
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parser.exit()
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def main():
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global sheets
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@ -177,13 +213,13 @@ def main():
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epi = dedent('''
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Examples:
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To look up 'tar':
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cheat tar
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To create or edit the cheatsheet for 'foo':
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cheat -e foo
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To list the directories on the CHEATPATH
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cheat -d
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@ -193,7 +229,8 @@ def main():
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parser = argparse.ArgumentParser(prog='cheat',
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description=desc, epilog=epi,
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formatter_class=argparse.RawDescriptionHelpFormatter)
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formatter_class=argparse.
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RawDescriptionHelpFormatter)
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parser_group = parser.add_mutually_exclusive_group()
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parser_group.add_argument('sheet', metavar='cheatsheet',
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action='store', type=str, nargs='?',
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