Performed a large refactoring
Performed an extensive refactoring on the entire application for the
sake of code-cleanliness.
- Refactored out of an ad-hoc Imperative paradigm into more of a
functional/declarative paradigm. IMO, this makes the application
signifcantly easier to understand.
- Moved away from `argparse` and into `docopt` for argument parsing
- Version bump to 2.0.0
- Performed extensive refactoring on the setup.py script. Script should
install to the system more cleanly now.
- Made minor formatting changes to the --list flag output
- Updated the README
Squashed commit of the following:
commit e5681bd536aa0220cdeb7884cc248db55be408c9
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 23:30:21 2014 -0400
Fixed many bugs
Everything seems to work now, I think.
commit 764ec5950cee958eb1b8333ddfcb6bcd45c28429
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 21:51:31 2014 -0400
Restructuring for the sake of setup.py
Seem to finally have a working install script
commit 5a866c23857b77ec65070dd8023cd734f2b7c242
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 18:01:11 2014 -0400
Nits
commit a79954ba5b33d992fa6a32abffb33b161d624e3d
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 17:53:03 2014 -0400
Implemented search
commit b570a897e9a12c15affe1a72628deae31836dee2
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 17:11:27 2014 -0400
Nits
commit 1a8d85b44457f1b2131b3e8475c5270b5d0899e3
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 17:02:22 2014 -0400
Still refactoring across files
Trying to make the program structure clearer
commit 34dffd6462e492e81ea558e2009a71051b7663c9
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 16:40:37 2014 -0400
Breaking app into several files
This is for the sake of code-cleanliness
commit 4825d678ff5f9817ccbf727ef71e5dea15ff2586
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 15:55:19 2014 -0400
Got syntax highlighting working
commit c37d7a626d451bfca3d4a072eb9fed604085170f
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 15:29:22 2014 -0400
Reduced verbosity of function names
commit 8e626045186b37dce2480f5af1994ddfa8db79b5
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 15:24:41 2014 -0400
Refactored argument passing
Fewer arguments now need to be passed throughout the app.
commit 807ba814650010b3dd1b59d27400b3fb4fcfede7
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Sat Apr 26 11:40:05 2014 -0400
Working through the refactor
commit e34e6540d4f8cd727e98aac68289d515a02d5fe6
Author: Chris Lane <chris@chris-allen-lane.com>
Date: Thu Apr 24 20:00:10 2014 -0400
Got a basic end-to-end refactor working
Have re-implemented just the most basic functionality in the "cheat2"
file.
This commit is contained in:
Chris Lane
parent
c03cca9298
commit
f46698b656
54
README.md
54
README.md
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@ -7,7 +7,7 @@ remember.
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`cheat` depends only on python.
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`cheat` depends only on `python` and `pip`.
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Examples
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@ -15,9 +15,7 @@ Examples
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The next time you're forced to disarm a nuclear weapon without consulting
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Google, you may run:
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```sh
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cheat tar
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```
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cheat tar
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You will be presented with a cheatsheet resembling:
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@ -38,7 +36,7 @@ tar -xjvf /path/to/foo.tgz
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tar -cjvf /path/to/foo.tgz /path/to/foo/
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```
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To see what cheatsheets are availble, run `cheat` with no arguments.
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To see what cheatsheets are availble, run `cheat -l`.
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Note that, while `cheat` was designed primarily for *nix system administrators,
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it is agnostic as to what content it stores. If you would like to use `cheat`
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@ -47,38 +45,14 @@ to store notes on your favorite cookie recipes, feel free.
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Installing
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==========
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First install the required python dependencies with:
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### Installing for all users (requires root)
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sudo pip install docopt pygments
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Clone this repository and `cd` into it, then run
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Then, clone this repository, `cd` into it, and run:
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sudo python setup.py install
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### Installing in your home directory
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Clone this repository and `cd` into it, then run
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mkdir -p ~/bin
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cp cheat ~/bin
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mkdir ~/.cheat
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cp cheatsheets/* ~/.cheat
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### Testing
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After installing for all users or in your home directory, try `cheat tar` for instance.
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### Troubleshooting
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In case you got an error such as:
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> ImportError: No module named argparse
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You're probably using python < 2.7 and you need to manually install the argparse module.
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You can do this easily with pip:
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```bash
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sudo apt-get install python-pip
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sudo pip install argparse
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```
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Other methods: https://pypi.python.org/pypi/argparse
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Modifying Cheatsheets
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=====================
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@ -118,15 +92,11 @@ Setting a CHEATPATH
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You can additionally instruct `cheat` to look for cheatsheets in other
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directories by exporting a `CHEATPATH` environment variable:
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```bash
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export CHEATPATH=/path/to/my/cheats
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```
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export CHEATPATH=/path/to/my/cheats
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You may, of course, append multiple directories to your `CHEATPATH`:
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```bash
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export CHEATPATH=$CHEATPATH:/path/to/more/cheats
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```
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export CHEATPATH=$CHEATPATH:/path/to/more/cheats
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You may view which directories are on your `CHEATPATH` with `cheat -d`.
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@ -135,18 +105,14 @@ Enabling Syntax Highlighting
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`cheat` can apply syntax highlighting to your cheatsheets if so desired. To
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enable this feature, set a `CHEATCOLORS` environment variable:
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```bash
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export CHEATCOLORS=true
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```
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export CHEATCOLORS=true
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Creating/Editing Cheatsheets
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----------------------------
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Provided that you have an `EDITOR` environment variable set, you may create new
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cheatsheets via:
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```bash
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cheat -e foo
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```
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cheat -e foo
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If the 'foo' cheatsheet already exists, it will be opened for editing.
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@ -0,0 +1,61 @@
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#!/usr/bin/env python
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"""cheat
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Usage:
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cheat <cheatsheet>
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cheat -e <cheatsheet>
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cheat -s <keyword>
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cheat -l
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cheat -d
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cheat -v
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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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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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Options:
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-d --directories List directories on CHEATPATH
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-e --edit Edit cheatsheet
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-l --list List cheatsheets
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-s --search Search cheatsheets for <keyword>
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-v --version Print the version number
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"""
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# require the dependencies
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from cheat import *
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from cheat.utils import *
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from docopt import docopt
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if __name__ == '__main__':
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# parse the command-line options
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options = docopt(__doc__, version='cheat 2.0.0')
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# list directories
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if options['--directories']:
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print("\n".join(sheets.paths()))
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# list cheatsheets
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elif options['--list']:
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print(sheets.list())
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# create/edit cheatsheet
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elif options['--edit']:
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sheet.create_or_edit(options['<cheatsheet>'])
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# search among the cheatsheets
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elif options['--search']:
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print(colorize(sheets.search(options['<keyword>'])))
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# print the cheatsheet
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else:
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print(colorize(sheet.read(options['<cheatsheet>'])))
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320
cheat
320
cheat
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@ -1,320 +0,0 @@
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#!/usr/bin/env python
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"""
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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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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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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import os
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import sys
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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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# 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 pretty_print(filename):
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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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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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class CheatSheets(object):
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"""Cheatsheets database class."""
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dirs = None
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sheets = None
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def __init__(self):
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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'
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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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def __cheat_directories(self):
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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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|
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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(self):
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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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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 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
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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 '
|
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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 '
|
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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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|
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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 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])
|
||||
else:
|
||||
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)
|
||||
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)
|
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import shutil
|
||||
|
||||
# attempt to copy the cheatsheet to DEFAULT_CHEAT_DIR
|
||||
try:
|
||||
new_sheet = os.path.join(DEFAULT_CHEAT_DIR, cheat)
|
||||
shutil.copy(sheet_path, new_sheet)
|
||||
subprocess.call(editor + [new_sheet])
|
||||
|
||||
# fail gracefully if the cheatsheet cannot be copied. This
|
||||
# can happen if DEFAULT_CHEAT_DIR does not exist
|
||||
except IOError:
|
||||
print ('Could not copy cheatsheet for editing.')
|
||||
exit(1)
|
||||
|
||||
# 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.
|
||||
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
|
||||
else:
|
||||
if os.access(sheet_path, os.W_OK):
|
||||
subprocess.call(editor
|
||||
+ [os.path.join(cs.cheat_dir, cheat)])
|
||||
else:
|
||||
error_msg = ("Couldn't create '%s' cheatsheet.\n"
|
||||
"Please retry usig sudo." % cheat)
|
||||
print >> sys.stderr, error_msg
|
||||
exit(1)
|
||||
except OSError as errno:
|
||||
print >> sys.stderr, ("Could not launch `%s` as your editor : %s"
|
||||
% (editor[0], errno.strerror))
|
||||
exit(1)
|
||||
|
||||
def list(self):
|
||||
"""Lists the cheatsheets that are currently available"""
|
||||
max_command = max([len(x) for x in self.sheets.keys()]) + 3
|
||||
return ('\n'.join(sorted(['%s [%s]' % (key.ljust(max_command), value)
|
||||
for key, value in self.sheets.items()])))
|
||||
|
||||
def __parse_cheat_command_block(self, cheat):
|
||||
"""Parse text blocks inside specified sheet file"""
|
||||
block = ""
|
||||
path = os.path.join(self.sheets[cheat], cheat)
|
||||
with open(path) as cheat_fp:
|
||||
for line in cheat_fp.readlines():
|
||||
if line == '\n':
|
||||
if block:
|
||||
yield block
|
||||
block = ""
|
||||
else:
|
||||
block += line
|
||||
if block:
|
||||
yield block
|
||||
|
||||
def search(self, term):
|
||||
"""Search for a term in sheetcheats"""
|
||||
for cheat in self.sheets.keys():
|
||||
output = ''
|
||||
for block in self.__parse_cheat_command_block(cheat):
|
||||
if term in block:
|
||||
if not output:
|
||||
output = cheat + ":\n"
|
||||
output += ''.join([" " + line + '\n' for line
|
||||
in block.split('\n')])
|
||||
if output:
|
||||
sys.stdout.write(output);
|
||||
|
||||
|
||||
# Custom action for argparse
|
||||
class ListDirectories(argparse.Action):
|
||||
"""List cheat directories and exit"""
|
||||
def __call__(self, parser, namespace, values, option_string=None):
|
||||
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()
|
||||
|
||||
|
||||
class SearchSheet(argparse.Action):
|
||||
"""If the user wants to search a term inside all cheatsheets"""
|
||||
def __call__(self, parser, namespace, values, option_string=None):
|
||||
sheets.search(values[0])
|
||||
parser.exit()
|
||||
|
||||
|
||||
def main():
|
||||
"""Main execution function"""
|
||||
global sheets
|
||||
sheets = CheatSheets()
|
||||
|
||||
desc = dedent('''
|
||||
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.''').strip()
|
||||
|
||||
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
|
||||
|
||||
To list the available cheatsheets:
|
||||
cheat -l
|
||||
''').strip()
|
||||
|
||||
parser = argparse.ArgumentParser(prog='cheat',
|
||||
description=desc, epilog=epi,
|
||||
formatter_class=argparse.
|
||||
RawDescriptionHelpFormatter)
|
||||
parser_group = parser.add_mutually_exclusive_group()
|
||||
parser_group.add_argument('sheet', metavar='cheatsheet',
|
||||
action='store', type=str, nargs='?',
|
||||
help='Look at <cheatseet>')
|
||||
parser_group.add_argument('-e', '--edit', metavar='cheatsheet',
|
||||
action=EditSheet, type=str, nargs=1,
|
||||
help='Edit <cheatsheet>')
|
||||
parser_group.add_argument('-s', '--search', metavar='term',
|
||||
action=SearchSheet, type=str, nargs=1,
|
||||
help='Search <term> inside all cheatsheets')
|
||||
parser_group.add_argument('-l', '--list',
|
||||
action=ListCheatsheets, nargs=0,
|
||||
help='List all available cheatsheets')
|
||||
parser_group.add_argument('-d', '--cheat-directories',
|
||||
action=ListDirectories, nargs=0,
|
||||
help='List all current cheat dirs')
|
||||
args = parser.parse_args()
|
||||
sheet = args.sheet
|
||||
|
||||
# Print the cheatsheet if it exists
|
||||
if not sheet or sheet in ['help', 'cheat']:
|
||||
parser.print_help()
|
||||
elif sheet in sheets.sheets:
|
||||
filename = os.path.join(sheets.sheets[sheet], sheet)
|
||||
if USE_PYGMENTS:
|
||||
pretty_print(filename)
|
||||
else:
|
||||
with open(filename) as istream:
|
||||
for line in istream:
|
||||
sys.stdout.write(line)
|
||||
|
||||
# if it does not, say so
|
||||
else:
|
||||
print >> sys.stderr, ('No cheatsheet found for %s.' % sheet)
|
||||
exit(1)
|
||||
exit()
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
import sheet
|
||||
import sheets
|
||||
import utils
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
import os
|
||||
|
||||
def sheets_dir():
|
||||
return os.path.split(__file__)
|
||||
|
|
@ -0,0 +1,94 @@
|
|||
from cheat import sheets
|
||||
from cheat import utils
|
||||
from cheat.utils import *
|
||||
import os
|
||||
import shutil
|
||||
import subprocess
|
||||
|
||||
|
||||
def copy(current_sheet_path, new_sheet_path):
|
||||
""" Copies a sheet to a new path """
|
||||
|
||||
# attempt to copy the sheet to DEFAULT_CHEAT_DIR
|
||||
try:
|
||||
shutil.copy(current_sheet_path, new_sheet_path)
|
||||
|
||||
# fail gracefully if the cheatsheet cannot be copied. This can happen if
|
||||
# DEFAULT_CHEAT_DIR does not exist
|
||||
except IOError:
|
||||
die ('Could not copy cheatsheet for editing.')
|
||||
|
||||
|
||||
def create_or_edit(sheet):
|
||||
""" Creates or edits a cheatsheet """
|
||||
|
||||
# if the cheatsheet does not exist
|
||||
if not exists(sheet):
|
||||
create(sheet)
|
||||
|
||||
# if the cheatsheet exists and is writeable...
|
||||
elif exists(sheet) and is_writable(sheet):
|
||||
edit(sheet)
|
||||
|
||||
# if the cheatsheet exists but is not writable...
|
||||
elif exists(sheet) and not is_writable(sheet):
|
||||
# ... ask the user if we should copy the cheatsheet to her home directory for editing
|
||||
yes = prompt_yes_or_no(
|
||||
'The ' + sheet + ' sheet is not editable. Do you want to copy it to '
|
||||
'your user cheatsheets directory before editing? Keep in mind that '
|
||||
'your sheet will always be used before system-wide one.'
|
||||
)
|
||||
|
||||
# if yes, copy the cheatsheet to the home directory before editing
|
||||
if yes:
|
||||
copy(path(sheet), os.path.join(sheets.default_path(), sheet))
|
||||
edit(sheet)
|
||||
|
||||
# if no, just abort
|
||||
else:
|
||||
die('Aborting.')
|
||||
|
||||
|
||||
def create(sheet):
|
||||
""" Creates a cheatsheet """
|
||||
new_sheet_path = os.path.join(sheets.default_path(), sheet)
|
||||
|
||||
try:
|
||||
subprocess.call([editor(), new_sheet_path])
|
||||
|
||||
except OSError:
|
||||
die('Could not launch ' + editor())
|
||||
|
||||
|
||||
def edit(sheet):
|
||||
""" Opens a cheatsheet for editing """
|
||||
|
||||
try:
|
||||
subprocess.call([editor(), path(sheet)])
|
||||
|
||||
except OSError:
|
||||
die('Could not launch ' + editor())
|
||||
|
||||
|
||||
def exists(sheet):
|
||||
""" Predicate that returns true if the sheet exists """
|
||||
return sheet in sheets.get() and os.access(path(sheet), os.R_OK)
|
||||
|
||||
|
||||
def is_writable(sheet):
|
||||
""" Predicate that returns true if the sheet is writeable """
|
||||
return sheet in sheets.get() and os.access(path(sheet), os.W_OK)
|
||||
|
||||
|
||||
def path(sheet):
|
||||
""" Returns a sheet's filesystem path """
|
||||
return sheets.get()[sheet]
|
||||
|
||||
|
||||
def read(sheet):
|
||||
""" Returns the contents of the cheatsheet as a String """
|
||||
if not exists(sheet):
|
||||
die('No cheatsheet found for ' + sheet)
|
||||
|
||||
with open (path(sheet)) as cheatfile:
|
||||
return cheatfile.read()
|
||||
Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue