docs(delta): add all sorts of goodies to cheat sheet

delta/README.md

@@ -5,12 +5,122 @@ tagline: |
   delta: A syntax-highlighting pager for git and diff output
 ---
 
-To update or switch versions, run `webi delta` (or `@0.9.1`, `@0.9.0`,
-etc).
+To update or switch versions, run `webi delta` (or `@0.9.1`, `@0.9.0`, etc).
 
 ## Cheat Sheet
 
-Install delta and add this to your `~/.gitconfig`:
+> `delta` gives you GitHub-style diffs, with word-level diff coloring, right in
+> your trusty rusty terminal.
+
+![](https://user-images.githubusercontent.com/52205/65248525-32250480-daea-11e9-9965-1a05c6a4bdf4.png)
+
+Here we'll cover:
+
+- **The install**: which files are added or changed
+- **Configuration**: how to set a syntax theme
+- **Preview**: how to list or show the color schemes
+- **Manual Config**: how to turn `delta` on or off for git diffs
+
+For the full set of options, be sure to check out the helpful
+[README](https://github.com/dandavison/delta).
+
+## Files
+
+These are the files that are created and/or modified with this installer:
+
+```txt
+~/.config/envman/PATH.env
+~/.gitconfig
+~/.local/bin/delta
+~/.local/opt/delta-VERSION/bin/delta
+```
+
+## How to set delta's color scheme
+
+Delta uses `~/.gitconfig` for most of its options.
+
+Set `delta.syntax-theme` to change the color scheme:
+
+```bash
+git config delta.syntax-theme 'Coldark-Dark'
+```
+
+## How to list / preview delta's themes
+
+You can list all available themes with `--list-syntax-themes`, or see each color
+schemes in action with `--show-syntax-themes`:
+
+```bash
+delta --list-syntax-themes --dark
+delta --show-syntax-themes --dark
+```
+
+You can also show only light or dark themes:
+
+```bash
+delta --list-syntax-themes --light
+delta --show-syntax-themes --light
+```
+
+```bash
+delta --list-syntax-themes --dark
+delta --show-syntax-themes --dark
+```
+
+Here's the current list, for convenience:
+
+### Dark Syntax Themes
+
+```txt
+1337
+Coldark-Cold
+Coldark-Dark
+DarkNeon
+Dracula
+Monokai Extended
+Monokai Extended Bright
+Monokai Extended Origin
+Nord
+OneHalfDark
+Solarized (dark)
+Sublime Snazzy
+TwoDark
+Visual Studio Dark+
+ansi
+base16
+base16-256
+gruvbox-dark
+zenburn
+```
+
+### Light Syntax Themes
+
+```txt
+GitHub
+Monokai Extended Light
+OneHalfLight
+Solarized (light)
+gruvbox-light
+```
+
+## How to manually configure git to use delta
+
+You can use `git config --global` to get or set any arbitrary option of
+`~/.gitconfig`.
+
+```bash
+git config --global page.diff delta
+git config --global page.show delta
+git config --global page.log delta
+git config --global page.blame delta
+git config --global page.reflog delta
+
+git config --global interactive.diffFilter 'delta --color-only'
+
+git config delta.syntax-theme 'Coldark-Dark'
+```
+
+Your `~/.gitconfig` will then contain these sections and options:
 
 ```gitconfig
 [pager]
@@ -22,6 +132,7 @@ Install delta and add this to your `~/.gitconfig`:
 
 [interactive]
     diffFilter = delta --color-only
-```
 
-Make sure to check out the helpful [ReadMe](https://github.com/dandavison/delta/blob/master/README.md)
+[delta]
+    syntax-theme = Coldark-Dark
+```