Merge branch '44-add-toggleable-light-dark-mode-variable' into 'master'

Resolve "Add toggleable light/dark mode variable"

Closes #44

See merge request marty-oehme/dotfiles!18

.config/alacritty/alacritty.yml

@@ -171,7 +171,7 @@ font:
 draw_bold_text_with_bright_colors: false
 
 # Colors (Gruvbox light)
-gruvboxlight: &gruvboxlight
+gruvboxlight: &gruvbox-light
   # Default colors
   primary:
     # hard contrast: background = '0xf9f5d7'
@@ -202,7 +202,7 @@ gruvboxlight: &gruvboxlight
     white:   '0x3c3836'
 
 # Colors (Gruvbox dark)
-gruvboxdark: &gruvboxdark
+gruvboxdark: &gruvbox-dark
   # Default colors
   primary:
     # hard contrast: background = '0x1d2021'
@@ -232,8 +232,7 @@ gruvboxdark: &gruvboxdark
     cyan:    '0x8ec07c'
     white:   '0xebdbb2'
 
-colors:
+colors: *gruvbox-dark
-    *gruvboxdark
 
 # Visual Bell
 #

.local/bin/dimswitch

@@ -0,0 +1,197 @@
+#!/usr/bin/env bash
+#
+#==============================================================================
+# FILE: dimswitch
+# USAGE: dimswitch [-v] [-h] [-i [application]] [-t theme name] dark/light
+#
+# DESCRIPTION:
+# Toggle alacritty terminal, and between dark
+# or light mode (if correctly set up in the alacritty.yml file), see REQUIREMENTS
+# The default action is to toggle between light and dark mode.
+#
+# OPTIONS: see function ’usage’ below
+#
+# REQUIREMENTS:
+# The alacritty.yml file needs to have the various color-schemes set up as yaml
+# anchors. The script itself will then switch the referenced anchor in the actual
+# `color` key of the file. For an example alacritty.yml refer to its wiki, or
+# this file: https://gitlab.com/marty-oehme/dotfiles/blob/master/.config/alacritty/alacritty.yml
+#
+# NOTES:  This script is in active development and its functionality and options
+#         are very much undergoing changes. For now, do not rely on its options
+#         staying stable.
+#
+# AUTHOR:
+# Marty Oehme
+#
+# VERSION:
+ld_version="0.1.1"
+#==============================================================================
+
+#=== environment variables ====================================================
+# DESCRIPTION:  Environment variables to configure the script
+#==============================================================================
+
+# Sets the programs to be dimmed
+if [ -z "$DIM_PROGRAMS" ]; then DIM_PROGRAMS=(alacritty); fi
+
+# Sets the path(s) to the alacritty configuration file
+if [ -z "$DIM_ALACRITTY_CONF" ]; then DIM_ALACRITTY_CONF="$HOME/.config/alacritty/alacritty.yml:$HOME/.alacritty.yml"; fi
+
+#=== main function ============================================================
+# NAME:         main
+# DESCRIPTION:  Display usage information for this script.
+# PARAMETERS:   see usage function
+#==============================================================================
+main() {
+  local cmd=""
+  local ret=0
+
+  case "$1" in
+  -v | --version)
+    cmd="version"
+    ;;
+  -h | --help)
+    cmd="usage"
+    ;;
+  -i | --info)
+    cmd="printinfo"
+    ;;
+  "")
+    cmd="toggle"
+    ;;
+  esac
+  shift
+
+  $cmd "$@"
+  ret=$((ret + $?))
+  exit $ret
+}
+
+#=== usage function ===========================================================
+# NAME:         usage
+# DESCRIPTION:  Display usage information for this script.
+#==============================================================================
+usage() {
+  local name
+  name=$(basename "$0")
+  cat <<EOF
+$name is a command line tool to toggle alacritty terminal themes.
+
+Usage:
+    $name                                 # Toggle theme between dark and light mode
+    $name                                 # Set to specified alacritty theme
+    $name -i | --info                     # Print out programs to be dimmed
+    $name -h | --help                     # Print this usage information
+    $name -v | --version                  # Print version information
+EOF
+}
+
+#=== theme info function=======================================================
+# NAME:         printinfo
+# DESCRIPTION:  Displays the programs to be dimmed, and the path to their
+#               configuration files. Currently only alacritty is implemented.
+#==============================================================================
+printinfo() {
+  for prog in "${DIM_PROGRAMS[@]}"; do
+    local file
+    file=$(getConfFile "$prog")
+    if [ -z "$file" ]; then
+      file="No associated configuration file found."
+    fi
+    echo "$prog" "-" "$file"
+  done
+}
+
+#=== toggle dimming function===================================================
+# NAME:         toggle
+# DESCRIPTION:  Toggles between dark and light mode in alacritty.
+#==============================================================================
+toggle() {
+  local file
+  file=$(getConfFile "alacritty")
+  if [ -z "$file" ]; then
+    exit 1
+  fi
+  local line
+  line=$(_findline "$file")
+  if [ -z "$line" ]; then exit 1; fi
+
+  if [[ -n $(_isdark "$file" "$line") ]]; then
+    _replace "$line" "$file" dark light
+    exit 0
+  fi
+
+  if [[ -n $(_islight "$file" "$line") ]]; then
+    _replace "$line" "$file" light dark
+    exit 0
+  fi
+
+  echo "Did not find a light/dark theme to toggle in alacritty."
+  exit 1
+}
+
+#=== version function==========================================================
+# NAME:         version
+# DESCRIPTION:  Display the current version of the script.
+#==============================================================================
+version() {
+  local name
+  name=$(basename "$0")
+  cat <<EOF
+$name $ld_version
+EOF
+}
+
+#=== get program's config file function =======================================
+# NAME: getConfFile
+# DESCRIPTION: Return the configuration file of the selected program.
+# PARAMETER 1: [String] Name of Program
+#==============================================================================
+getConfFile() {
+  local conf
+  case $1 in
+  alacritty)
+    conf=$(_findfile "$DIM_ALACRITTY_CONF")
+    ;;
+  esac
+
+  echo "$conf"
+}
+
+#=== verify file exists function ==============================================
+# NAME:         _findfile
+# DESCRIPTION:  Splits the string passed in into an array of paths and finds
+#               the first existing file. Return nothing if no file found.
+# PARAMETER 1:  [String] of paths, delimited by ":"
+#==============================================================================
+_findfile() {
+  IFS=':' read -ra paths <<<"$1"
+  for i in "${paths[@]}"; do
+    if [ -f "$i" ]; then
+      echo "$i"
+    fi
+  done
+}
+
+# function signature: _findline FILE
+_findline() {
+  sed -n '/^colors: .*$/=' "$1"
+}
+
+# function signature: _islight LINENUMBER FILE
+_islight() {
+  sed -n "$2p" "$1" | grep -e "-light$"
+}
+
+# function signature: _isdark LINENUMBER FILE
+_isdark() {
+  sed -n "$2p" "$1" | grep -e "-dark$"
+}
+
+# function signature: _replace LINENUMBER FILE OLD NEW
+_replace() {
+  sed -i "$1 s/-$3$/-$4/" "$2"
+}
+
+main "$@"

.local/bin/test/dimswitch.bats

@@ -0,0 +1,63 @@
+setup() {
+  fut="$BATS_TEST_DIRNAME/../dimswitch"
+}
+
+@test "[-v flag] Displays version information" {
+  run $fut -v
+  [ "$status" -eq 0 ]
+  match='^.* [0-9]\.[0-9]\.[0-9]$'
+  echo $output
+  if echo "$output" | grep "$match";then true;else false; fi
+}
+
+@test "[--version flag] Displays version information" {
+  run $fut --version
+  [ "$status" -eq 0 ]
+  match='^.* [0-9]\.[0-9]\.[0-9]$'
+  echo $output
+  if echo "$output" | grep "$match";then true;else false; fi
+}
+
+@test "[-h flag] Displays usage information" {
+  run $fut -h
+  [ "$status" -eq 0 ]
+  match='^.*Usage:.*$'
+  echo $output
+  if echo "$output" | grep "$match";then true;else false; fi
+}
+
+@test "[--help flag] Displays usage information" {
+  run $fut --help
+  [ "$status" -eq 0 ]
+  match='^.*Usage:.*$'
+  echo $output
+  if echo "$output" | grep "$match";then true;else false; fi
+}
+
+#### _findfile
+
+@test "[-i flag] Displays config file for alacritty" {
+  export DIM_PROGRAMS="alacritty"
+  export DIM_ALACRITTY_CONF="$BATS_TEST_DIRNAME/files/alacritty_conf.yml"
+
+  run $fut -i
+  [ "$status" -eq 0 ]
+  match="^alacritty - $DIM_ALACRITTY_CONF"
+
+  echo $output
+
+  if echo "$output" | grep "$match";then true;else false;fi
+}
+
+@test "[-i flag] Displays error if no config file found" {
+  export DIM_PROGRAMS="alacritty"
+  export DIM_ALACRITTY_CONF="$BATS_TEST_DIRNAME/files/nonexisting_alacritty_conf.yml"
+
+  run $fut -i
+  [ "$status" -eq 0 ]
+  match="^alacritty - No associated configuration file found."
+
+  echo $output
+
+  if echo "$output" | grep "$match";then true;else false;fi
+}