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