mirror of https://github.com/cheat/cheat.git
110 lines
3.5 KiB
Python
Executable File
110 lines
3.5 KiB
Python
Executable File
#!/usr/bin/env python
|
|
import os
|
|
import sys
|
|
|
|
DEFAULT_CHEAT_DIR = 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:
|
|
try:
|
|
from pygments import highlight
|
|
from pygments.util import ClassNotFound
|
|
from pygments.lexers import get_lexer_for_filename, TextLexer
|
|
from pygments.formatters import TerminalFormatter
|
|
USE_PYGMENTS = True
|
|
except ImportError:
|
|
pass
|
|
|
|
def cheat_directories():
|
|
"Assembles a list of directories containing cheatsheets."
|
|
default_directories = [DEFAULT_CHEAT_DIR]
|
|
try:
|
|
import cheatsheets
|
|
default_directories.append(cheatsheets.cheat_dir)
|
|
except ImportError:
|
|
pass
|
|
|
|
default = [default_dir for default_dir in default_directories
|
|
if os.path.isdir(default_dir)]
|
|
|
|
if 'CHEATPATH' in os.environ and os.environ['CHEATPATH']:
|
|
return [path for path in os.environ['CHEATPATH'].split(os.pathsep)
|
|
if os.path.isdir(path)] + default
|
|
else:
|
|
return default
|
|
|
|
|
|
def cheat_files(cheat_directories):
|
|
"Assembles a dictionary of cheatsheets found in the above directories."
|
|
cheats = {}
|
|
for cheat_dir in reversed(cheat_directories):
|
|
cheats.update(dict([(cheat, cheat_dir)
|
|
for cheat in os.listdir(cheat_dir)
|
|
if not cheat.endswith('md')
|
|
and not cheat.startswith('.')
|
|
and not cheat.startswith('LICENSE')
|
|
and not cheat.startswith('__')]))
|
|
return cheats
|
|
|
|
|
|
def main():
|
|
# assemble a keyphrase out of all params passed to the script
|
|
keyphrase = ' '.join(sys.argv[1:])
|
|
cheat_dirs = cheat_directories()
|
|
|
|
# verify that we have at least one cheat directory
|
|
if not cheat_dirs:
|
|
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()
|
|
|
|
# list the files in the ~/.cheat directory
|
|
cheatsheets = cheat_files(cheat_dirs)
|
|
|
|
# print help if requested
|
|
if keyphrase.lower() in ['', 'cheat', 'help', '-h', '-help', '--help']:
|
|
print "Usage: cheat [keyphrase]\n"
|
|
print "Available keyphrases:"
|
|
max_command = max([len(x) for x in cheatsheets.keys()]) + 3
|
|
print '\n'.join(sorted(['%s [%s]' % (key.ljust(max_command), value)
|
|
for key, value in cheatsheets.items()]))
|
|
exit()
|
|
|
|
# print the cheatsheet if it exists
|
|
if keyphrase in cheatsheets:
|
|
filename = os.path.join(cheatsheets[keyphrase], keyphrase)
|
|
if USE_PYGMENTS:
|
|
pretty_print(filename)
|
|
else:
|
|
with open(filename) as istream:
|
|
for l in istream:
|
|
sys.stdout.write(l)
|
|
|
|
# if it does not, say so
|
|
else:
|
|
print 'No cheatsheet found for %s.' % keyphrase
|
|
|
|
|
|
|
|
def pretty_print(filename):
|
|
try:
|
|
if os.path.splitext(filename)[1]:
|
|
lexer = get_lexer_for_filename(filename)
|
|
else:
|
|
# shell is a sensible default when there is no extension
|
|
lexer = get_lexer_for_filename(filename + '.sh')
|
|
|
|
except ClassNotFound:
|
|
lexer = TextLexer()
|
|
|
|
with open(filename) as istream:
|
|
code = istream.read()
|
|
|
|
fmt = TerminalFormatter()
|
|
highlight(code, lexer, fmt, sys.stdout)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|