Outline Grep

Given a text file with a Python-style indentation structure, ogrep searches the file for a regular expression. It prints matching lines, with their "parent" lines as context. For example, if input.txt looks like this:

2009-01-01
  New Year's Day!
    No work today.
    Visit with family.
2009-01-02
  Grocery store and library.
2009-01-03
  Stay home.
2009-01-04
  Back to work.
    Remember to set an alarm.

then ogrep work input.txt will produce the following output:

2009-01-01
  New Year's Day!
    No work today.
2009-01-04
  Back to work.

Installation

Get the source code: git clone git://github.com/mbrubeck/outline-grep.git; cd outline-grep

OS X or Windows users, download the Haskell Platform. Then type cabal install.

Debian/Ubuntu users, run: sudo apt install libghc-regex-posix-dev, then run:

./Setup.lhs configure
./Setup.lhs build
sudo ./Setup.lhs install

Or to try the program without building and installing it, just run ./OutlineGrep.lhs in the source directory after installing the Haskell Platform (or the libghc6-regex-posix-dev package).

Copyright

Copyright (c) 2009 Matt Brubeck

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.