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gleitz
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instant coding answers via the command line

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howdoi

instant coding answers via the command line

.. image:: https://img.shields.io/travis/gleitz/howdoi?style=plastic&color=78dce8 :target: https://travis-ci.org/gleitz/howdoi

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|

.. image:: http://sublimate.org/flyers/HowDoIcolor512.png :target: https://pypi.python.org/pypi/howdoi :alt: Sherlock, your neighborhood sloth sleuth

Sherlock, your neighborhood sloth sleuth.


Are you a hack programmer? Do you find yourself constantly Googling for how to do basic programming tasks?

Suppose you want to know how to format a date in bash. Why open your browser and read through blogs (risking major distraction) when you can simply stay in the console and ask howdoi:

::

$ howdoi format date bash
> DATE=`date +%Y-%m-%d`

howdoi will answer all sorts of queries:

::

$ howdoi print stack trace python
> import traceback
>
> try:
>     1/0
> except:
>     print '>>> traceback <<     traceback.print_exc()
>     print '>>> end of traceback << traceback.print_exc()

$ howdoi convert mp4 to animated gif > video=/path/to/video.avi > outdir=/path/to/output.gif > mplayer "$video"
> -ao null
> -ss "00:01:00" \ # starting point > -endpos 10 \ # duration in second > -vo gif89a:fps=13:output=$outdir
> -vf scale=240:180

$ howdoi create tar archive > tar -cf backup.tar --exclude "www/subf3" www

.. image:: http://imgs.xkcd.com/comics/tar.png :target: https://xkcd.com/1168/

Installation

::

pip install howdoi

or

::

pip install git+https://github.com/gleitz/howdoi.git#egg=howdoi

or

::

python setup.py install

New to howdoi?

::

howdoi howdoi

Usage

::

usage: howdoi.py [-h] [-p POS] [-a] [-l] [-c] [-j] [-n NUM_ANSWERS] [-C] [-v] [-e ENGINE] [--save] [--view] [--remove] [--empty] QUERY [QUERY ...]

instant coding answers via the command line

positional arguments: QUERY the question to answer

optional arguments: -h, --help show this help message and exit -p POS, --pos POS select answer in specified position (default: 1) -a, --all display the full text of the answer -l, --link display only the answer link -c, --color enable colorized output -j, --json-output return answers in raw json format, to pretty print try 'howdoi pretty print json command line' -n NUM_ANSWERS, --num-answers NUM_ANSWERS number of answers to return -C, --clear-cache clear the cache -v, --version displays the current version of howdoi -e ENGINE, --engine ENGINE change search engine for this query only. Currently supported engines: google (default), bing, duckduckgo. --save stash a howdoi answer --view view your stash --remove remove an entry in your stash --empty empty your stash

Using the howdoi stashing feature (for more advanced features view the

keep documentation 
_).

::

stashing: howdoi --save QUERY
viewing: howdoi --view
removing: howdoi --remove (will be prompted which one to delete)
emptying: howdoi --empty (empties entire stash, will be prompted to confirm)

As a shortcut, if you commonly use the same parameters each time and don't want to type them, add something similar to your .bash_profile (or otherwise). This example gives you 5 colored results each time.

::

alias h='function hdi(){ howdoi $* -c -n 5; }; hdi'

And then to run it from the command line simply type:

::

$h this is my query for howdoi

Contributors

  • Benjamin Gleitzman (
    @gleitz 
    _)
  • Yanlam Ko (
    @YKo20010 
    _)
  • Diana Arreola (
    @diarreola 
    _)
  • Eyitayo Ogunbiyi (
    @tayoogunbiyi 
    _)
  • Chris Nguyen (
    @chrisngyn 
    _)
  • Shageldi Ovezov (
    @ovezovs 
    _)
  • Mwiza Simbeye (
    @mwizasimbeye11 
    _)
  • And
    more! 
    _

Notes

  • Works with Python2 and Python3
  • There is a
    GUI that wraps howdoi 
    _.
  • There is a
    Flask webapp that wraps howdoi 
    _.
  • An Alfred Workflow for howdoi can be found at
    http://blog.gleitzman.com/post/48539944559/howdoi-alfred-even-more-instant-answers 
    _.
  • Slack integration available through
    slack-howdoi 
    _.
  • Howdoi uses a cache for faster access to previous questions. Caching functionality can be disabled by setting the HOWDOIDISABLECACHE environment variable. The cache is stored in
    ~/.cache/howdoi
    .
  • You can set the HOWDOIURL environment variable to change the source url for answers (default:
    stackoverflow.com
    , also supported:
    serverfault.com
    ,
    pt.stackoverflow.com
    ,
    full list 
    ).
  • You can set the HOWDOISEARCHENGINE environment variable to change the underlying search engine for StackOverflow links (default:
    google
    , also supported:
    bing
    ,
    duckduckgo
    ). The -e flag will switch the underlying engine for a single query.
  • Setting the HOWDOI_COLORIZE environment variable will colorize the output by default.
  • Special thanks to Rich Jones (
    @miserlou 
    _) for the idea.
  • More thanks to
    Ben Bronstein 
    _ for the logo.

Development

  • Checkout the repo
  • Run
    python -m howdoi.howdoi QUERY
    (if you try running
    python howdoi/howdoi.py
    you might get
    ValueError: Attempted relative import in non-package
    ).

If you would like to use howdoi from within a python script, just pass your query to

howdoi.howdoi()
: ::
from howdoi import howdoi

query = "for loop python" output = howdoi.howdoi(query)

Or parse it yourself (either work):

::

from howdoi import howdoi

query = "for loop python" parser = howdoi.get_parser() args = vars(parser.parse_args(query.split(' ')))

output = howdoi.howdoi(args)

Extension Development

To simplify the process of integrating howdoi as a code editor extension, edit the files within the

extension/code-editor-integration folder 
_.

To improve upon the Visual Studio Code howdoi extension, edit the files within the

extension/vscode-ext folder 
_ and republish the extension.

Code Editor Integration ~~~~~~~~~~~~~~~~~~~~~~~

Head over to the

README.md 
_ for an in depth explanation on beginning development for the howdoi code editor integration plug-in.

Visual Studio Code Extension ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

To begin development for the Visual Studio Code extension, install all necessary packages:

::

npm install

Then, precompile the extension:

::

npm run precompile

To run and test the extension, utilize Visual Studio Code's

debugging tools 
_.

Visual Studio Code Extension Installation

howdoi can now be installed as an extension on Visual Studio Code! There are two ways to install it:

  1. On the Visual Studio Code MarketPlace:
  • Head over to the
    MarketPlace 
    _ to install the extension.
  1. Directly from the packaged extension:
  • Head over
    here 
    _ to locally install the howdoi Visual Studio Code package.

Contributing

I'm happy to accept pull requests that make howdoi better. If you're thinking of contributing and want a little feedback before you jump into the codebase, post an

issue 
_ on Github.

Before PRs are accepted they must pass all

Travis tests 
_ and not have any flake8 or pylint warnings or errors. This projects uses vanilla configuration files for both linters (
.flake8rc
and
.pylintrc
in the root directory), but with a max line length of 119.

Troubleshooting

You might get the following error when installing with Homebrew:

::

==> python setup.py install

http://peak.telecommunity.com/EasyInstall.html

Please make the appropriate changes for your system and try again.

Fix the error by executing the following command:

::

sudo chmod -R go+w /Library/Python/2.7/site-packages/

An official lxml for python 3.3+ for windows has not yet been released. You may get an error while installing. Try and install an unofficial binary for lxml from

::

http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml

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