Automate switching between day/night color schemes

This sets up individual light and dark color scheme files for vim/neovim
and alacritty, adds a script (`set-color`) for placing them, and
includes two no-arg scripts for later keybinding (`day-mode` and
`night-mode`).

Thanks to this blog post for the idea to `cat` the YAML into place:
https://shuheikagawa.com/blog/2020/02/14/switching-colorschemes-of-vim-and-alacritty/

TIL YAML is concatenative!

alacritty/.gitignore

@@ -0,0 +1,5 @@
+# Generated by `./install`
+/alacritty.yml
+
+# Symlink created by `../bin/set-colors`
+/colors.yml

alacritty/base.yml

@@ -90,51 +90,6 @@ render_timer: false
 # and cursor.background colors, otherwise invert the colors of the cursor.
 custom_cursor_colors: false
 
-# Colors (Tomorrow Night Bright)
-colors:
-  # Default colors
-  primary:
-    background: '0x000000'
-    foreground: '0xeaeaea'
-
-  # Colors the cursor will use if `custom_cursor_colors` is true
-  cursor:
-    text: '0x000000'
-    cursor: '0xffffff'
-
-  # Normal colors
-  normal:
-    black:   '0x000000'
-    red:     '0xd54e53'
-    green:   '0xb9ca4a'
-    yellow:  '0xe6c547'
-    blue:    '0x7aa6da'
-    magenta: '0xc397d8'
-    cyan:    '0x70c0ba'
-    white:   '0xffffff'
-
-  # Bright colors
-  bright:
-    black:   '0x666666'
-    red:     '0xff3334'
-    green:   '0x9ec400'
-    yellow:  '0xe7c547'
-    blue:    '0x7aa6da'
-    magenta: '0xb77ee0'
-    cyan:    '0x54ced6'
-    white:   '0xffffff'
-
-  # Dim colors (Optional)
-  dim:
-    black:   '0x333333'
-    red:     '0xf2777a'
-    green:   '0x99cc99'
-    yellow:  '0xffcc66'
-    blue:    '0x6699cc'
-    magenta: '0xcc99cc'
-    cyan:    '0x66cccc'
-    white:   '0xdddddd'
-
 # Visual Bell
 #
 # Any time the BEL code is received, Alacritty "rings" the visual bell. Once

alacritty/colors-dark.yml

@@ -0,0 +1,27 @@
+colors:
+  # Default colors
+  primary:
+    background: '0x1d1f21'
+    foreground: '0xc5c8c6'
+
+  # Normal colors
+  normal:
+    black:   '0x282a2e'
+    red:     '0xa54242'
+    green:   '0x8c9440'
+    yellow:  '0xde935f'
+    blue:    '0x5f819d'
+    magenta: '0x85678f'
+    cyan:    '0x5e8d87'
+    white:   '0x707880'
+
+  # Bright colors
+  bright:
+    black:   '0x373b41'
+    red:     '0xcc6666'
+    green:   '0xb5bd68'
+    yellow:  '0xf0c674'
+    blue:    '0x81a2be'
+    magenta: '0xb294bb'
+    cyan:    '0x8abeb7'
+    white:   '0xc5c8c6'

alacritty/colors-light.yml

@@ -0,0 +1,27 @@
+colors:
+  # Default colors
+  primary:
+    background: '0xf3f3f3'
+    foreground: '0x303030'
+
+  # Normal colors
+  normal:
+    black:   '0xdadada'
+    red:     '0xf32840'
+    green:   '0x059b00'
+    yellow:  '0xf06d14'
+    blue:    '0x337ada'
+    magenta: '0xac37f5'
+    cyan:    '0x0ababe'
+    white:   '0x707070'
+
+  # Bright colors
+  bright:
+    black:   '0xb3b3b3'
+    red:     '0xad1d2f'
+    green:   '0x345a09'
+    yellow:  '0xb44900'
+    blue:    '0x024299'
+    magenta: '0x63039f'
+    cyan:    '0x008a86'
+    white:   '0x909090'

alacritty/install

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+CURDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+inputs=(
+    "${CURDIR}/base.yml"
+    "${CURDIR}/colors.yml"
+)
+output="${CURDIR}/alacritty.yml"
+
+cat "${inputs[@]}" > "${output}"