Erreur32/cheat-fork-echo
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cheat-fork-echo
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In response to Issue #108: Added option to copy sheet while not editable.

This commit is contained in:
0rax 2013-10-11 18:32:21 +02:00
parent b6e73539bd
commit fc4b047958
1 changed files with 62 additions and 25 deletions
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@ -3,7 +3,7 @@
cheat.py -- cheat allows you to create and view interactive cheatsheets on the
command-line. It was designed to help remind *nix system
administrators of options for commands that they use frequently,
but not frequently enough to remember.
but not frequently enough to remember.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -25,9 +25,9 @@ import argparse
import subprocess
from textwrap import dedent
DEFAULT_CHEAT_DIR = os.environ.get('DEFAULT_CHEAT_DIR') or \
os.path.join(os.path.expanduser('~'), '.cheat')
USE_PYGMENTS = False
DEFAULT_CHEAT_DIR = (os.environ.get('DEFAULT_CHEAT_DIR') or
os.path.join(os.path.expanduser('~'), '.cheat'))
USE_PYGMENTS = False
# NOTE remove this check if it is confirmed to work on windows
if os.name == 'posix' and 'CHEATCOLORS' in os.environ:
@ -40,8 +40,9 @@ if os.name == 'posix' and 'CHEATCOLORS' in os.environ:
except ImportError:
pass
def pretty_print(filename):
"Applies syntax highlighting to a cheatsheet and writes it to stdout"
"""Applies syntax highlighting to a cheatsheet and writes it to stdout"""
try:
if os.path.splitext(filename)[1]:
lexer = get_lexer_for_filename(filename)
@ -58,8 +59,9 @@ def pretty_print(filename):
fmt = TerminalFormatter()
highlight(code, lexer, fmt, sys.stdout)
class CheatSheets(object):
dirs = None
sheets = None
@ -67,7 +69,8 @@ class CheatSheets(object):
self.dirs = self.__cheat_directories()
# verify that we have at least one cheat directory
if not self.dirs:
error_msg = 'The {default} dir does not exist or the CHEATPATH var is not set.'
error_msg = ('The {default} dir does not exist'
' or the CHEATPATH var is not set.')
print >> sys.stderr, error_msg.format(default=DEFAULT_CHEAT_DIR)
exit(1)
self.sheets = self.__cheat_files()
@ -91,7 +94,9 @@ class CheatSheets(object):
return default
def __cheat_files(self):
"""Assembles a dictionary of cheatsheets found in the above directories."""
"""
Assembles a dictionary of cheatsheets found in the above directories.
"""
cheats = {}
for cheat_dir in reversed(self.dirs):
cheats.update(dict([(cheat, cheat_dir)
@ -103,37 +108,64 @@ class CheatSheets(object):
def edit(self, cheat):
"""Creates or edits a cheatsheet"""
# Assert that the EDITOR environment variable is set and that at least 3
# arguments have been given
# Assert that the EDITOR environment variable is set and that at least
# 3 arguments have been given
if 'EDITOR' not in os.environ:
print >> sys.stderr, ('In order to create/edit a cheatsheet you '
'must set your EDITOR environment variable to your favorite '
'editor\'s path.')
'must set your EDITOR environment variable '
'to your favorite editor\'s path.')
exit(1)
elif os.environ['EDITOR'] == "":
print >> sys.stderr, ('Your EDITOR environment variable is set '
'to nothing, in order to create/edit a cheatsheet your must '
'set it to a valid editor\'s path.')
'to nothing, in order to create/edit a '
'cheatsheet your must set it to a valid '
'editor\'s path.')
exit(1)
else:
editor = os.environ['EDITOR'].split()
# if the cheatsheet already exists, open it for editing
try:
if cheat in sheets.sheets:
subprocess.call(editor + [os.path.join(self.sheets[cheat], cheat)])
if cheat in self.sheets:
sheet_path = os.path.join(self.sheets[cheat], cheat)
if os.access(sheet_path, os.W_OK):
subprocess.call(editor + [sheet_path])
else:
print >> sys.stderr, ("Sheet '%s' [%s] is not editable."
% (cheat, sheet_path))
print ('Do you want to '
'copy it to your user cheatsheets directory [%s] '
'before editing ?\nKeep in mind that your sheet '
'will always be used before system-wide one.'
% DEFAULT_CHEAT_DIR)
awn = raw_input('[y/n] ')
if awn != 'y':
print ('Ok, if you want to edit system-wide sheet, '
'please try `cheat -e <cheatsheet>` '
'again with sudo.')
exit(1)
import shutil
new_sheet = os.path.join(DEFAULT_CHEAT_DIR, cheat)
shutil.copy(sheet_path, new_sheet)
subprocess.call(editor + [new_sheet])
# otherwise, create it
else:
import cheatsheets as cs
# Attempt to write the new cheatsheet to the user's ~/.cheat dir if it
# exists. If it does not exist, attempt to create it.
# Attempt to write the new cheatsheet to the user's ~/.cheat
# dir if it exists. If it does not exist, attempt to create it.
if os.access(DEFAULT_CHEAT_DIR, os.W_OK) or os.makedirs(DEFAULT_CHEAT_DIR):
subprocess.call(editor + [os.path.join(DEFAULT_CHEAT_DIR, cheat)])
# If the directory cannot be created, write to the python package
# directory, though that will likely require the use of sudo
# If the directory cannot be created, write to the python
# package directory, though that will likely require the use
# of sudo
else:
subprocess.call(editor + [os.path.join(cs.cheat_dir, cheat)])
if os.access(sheet_path, os.W_OK):
subprocess.call(editor + [os.path.join(cs.cheat_dir, cheat)])
else:
print >> sys.stderr, ("Couldn't create '%s' cheatsheet."
% cheat)
exit(1)
except OSError, e:
print >> sys.stderr, ("Could not launch `%s` as your editor : %s"
% (editor[0], e.strerror))
@ -145,6 +177,7 @@ class CheatSheets(object):
return ('\n'.join(sorted(['%s [%s]' % (key.ljust(max_command), value)
for key, value in self.sheets.items()])))
# Custom action for argparse
class ListDirectories(argparse.Action):
"""List cheat directories and exit"""
@ -152,18 +185,21 @@ class ListDirectories(argparse.Action):
print("\n".join(sheets.dirs))
parser.exit()
class ListCheatsheets(argparse.Action):
"""List cheatsheets and exit"""
def __call__(self, parser, namespace, values, option_string=None):
print sheets.list()
parser.exit()
class EditSheet(argparse.Action):
"""If the user wants to edit a cheatsheet"""
def __call__(self, parser, namespace, values, option_string=None):
sheets.edit(values[0])
parser.exit()
def main():
global sheets
@ -177,13 +213,13 @@ def main():
epi = dedent('''
Examples:
To look up 'tar':
cheat tar
To create or edit the cheatsheet for 'foo':
cheat -e foo
To list the directories on the CHEATPATH
cheat -d
@ -193,7 +229,8 @@ def main():
parser = argparse.ArgumentParser(prog='cheat',
description=desc, epilog=epi,
formatter_class=argparse.RawDescriptionHelpFormatter)
formatter_class=argparse.
RawDescriptionHelpFormatter)
parser_group = parser.add_mutually_exclusive_group()
parser_group.add_argument('sheet', metavar='cheatsheet',
action='store', type=str, nargs='?',