Similar to 7a64fa5a26 which allowed
custom styles. Custom styles must end in -style, but colors can be
anything. It unfortunately seems not to be possible currently to store
a global reference to git config, hence the size of this
commit (passing the reference down the call stack).
- Handle standard filepath:code and filepath:line_number:code output
as produced by `git grep`, `rg -H`, `grep -H`, etc (with -n for line
numbers).
- Retain the match highlighting as produced by the grep tool, and
expose it in delta's color output styled with grep-match-style.
(Note that --color=always is needed to retain the color if piping
into delta, but not for `git grep` when delta is configured as git's
pager)
- Special handling of -p, and -W options of `git grep`: these display
the function context in which the matches occur.
- `navigate` keybindings jump between match function contexts under
`git grep -p` and between matching lines under `git grep -W`.
Thanks @zachriggle for the proposal.
Fixes#769
This addresses a bug triggered by doing things like
minus-style = minus-emph-style
That was causing the is_emph bit to be set on minus-style, with
undesirable consequences.
