This plugin provides a grep backend that can optionally use git-grep when
the current project is using Git.

You can search for files from the project-tree by selecting "Find in Files".
That will limit the search results to the directory that has been selected.

If the selected node is a File (instead of a directory), then only results
from that file will be shown.

You can search using regular expressions supported by the particular grep
implementation. We don't currently guarantee options here (or validate them
for correctness). Some effort could be done here using GRegex in the future.

As we already have support for performing edits across a number of files in
the background, the grep plugin allows you to select matches and replace them
with new text. In the future we could extend this to try to preserve casing
of the replacement.

To avoid lots of small strings and numerous copies of them, a custom
GtkTreeModel was used. Instead we have a single large buffer of results that
were obtained from grep, and keep an index to the start of each line in the
buffer. A \0 replaces the \n that we received from grep.

I expect additional work will be needed here, but this seems like a reasonable
first attempt at the feature. Larger projects may need additional performance
tweaks.