Composearch

Composearch (pronounced compo-search) is a composable text search engine powered by Scala.

Installation

You can run the interactive Composearch console application using sbt (tested with sbt 1.3.3).

Demo

Composearch comes with a simple console application that runs a simple searcher. An example session might look like:

$ sbt
sbt:Composearch> run tests/simple
Added 2 files to index:
giraffe.txt
multiline.txt
search> a long multiple line
giraffe.txt : 42%
multiline.txt : 14%
search> cats
no matches found
search> :quit

The simple searcher has the following behavior:

• It will only look for .txt files in the specified directory.
• It only cares about the words, and pairs of subsequent words, of the search string that are contained in the files.
• A file that has the same words as the search string but in the wrong order will get fewer points than one that has the exact words in the correct order. A file gets 100% if all subsequent pairs of words in the search string are found in the file.
• Uppercase/lowercase of the search string does not matter. 'CASE' is considered the same as 'case'.
• Only the ten highest ranked files are displayed.

Future work

• Make it easier to compose the behavior of a searcher.
• Add possibility to build a custom searcher through the console application.
• Add support to add other sources than files to index.
• Add other ranking algorithms.
• Add option to save index to disk.

Licence

• TODO