Refactor theme_qutebrowser to use utility functions
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@ -1,97 +1,94 @@
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#!/usr/bin/env bash
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readonly dependency=("theova/base16-qutebrowser")
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readonly app="qutebrowser"
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path="$1"
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package="$2"
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theme="$3"
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permanent="$4"
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readonly path="$1"
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readonly package="$2"
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readonly theme="$3"
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readonly permanent="$4"
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file_exists() {
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if [[ -f "$1" ]]; then
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true
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else
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false
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fi
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}
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# check for existence of pattern $2 in file $1
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line_exists() {
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local file="$1"
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local line="$2"
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# Safe sourcing: https://stackoverflow.com/a/12694189
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DIR="${BASH_SOURCE%/*}"
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if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
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# shellcheck source=utilities.sh
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. "$DIR/utilities.sh"
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if ! file_exists "$file" || ! grep -qe "$line" "$file"; then
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false
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else
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true
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fi
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}
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# prepare newline at eof to make adding newlines easier
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eol_exists_or_append() {
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local file="$1"
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local eof
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eof=$(tail -c 1 "$file")
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if [ -n "$eof" ]; then
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printf "\\n" >>"$file"
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fi
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}
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# append line $2 to file $1
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line_exists_or_append() {
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local file="$1"
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local line="$2"
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local new="${3:-$2}"
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if ! line_exists "$file" "$line"; then
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eol_exists_or_append "$file"
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echo "$new" >>"$file"
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fi
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}
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check_tfile() {
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if ! file_exists "$tfile"; then
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dbg_msg="$dbg_msg theme $theme for qutebrowser not found.\n"
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exit 1
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fi
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}
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theme_qutebrowser() {
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dbg_msg="QUTEBROWSER: $package - "
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## Main Entrypoint
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#
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# Finds the right theme template file and starts theme
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# switching and, if necessary, permanent setting processes.
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main() {
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dbg_msg $app "Starting Processor"
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tfile="$path/$package/themes/default/base16-$theme.config.py"
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check_tfile
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if ! file_exists "$tfile"; then
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dbg_msg $app "error" "Theme template $theme not found in package $package"
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exit 1
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fi
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if [[ "$permanent" == "true" ]]; then set_qutebrowser_theme; fi
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switch_qutebrowser_theme
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if [[ "$permanent" == "true" ]]; then save; fi
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theme
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[[ "$DEBUG" == true ]] && echo "$dbg_msg"
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dbg_msg $app "Processor Done"
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}
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switch_qutebrowser_theme() {
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## Theme switcher
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#
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# Makes sure that if any application instance is
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# currently running, it switches to new theme.
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theme() {
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dbg_msg $app "Switching theme"
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# make sure qutebrowser is running
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pgrep qutebrowser >/dev/null || return
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pgrep qutebrowser >/dev/null || {
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dbg_msg $app "warn" "No instance running, not switching theme"
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return
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}
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qutebrowser --loglevel error ":config-source $tfile"
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dbg_msg $app "Successfully switched theme"
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}
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set_qutebrowser_theme() {
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## Theme setter
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#
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# Takes care of permanently writing the desired
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# base16 theme into application settings.
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save() {
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dbg_msg $app "Saving theme"
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local qt_dir="${XDG_CONFIG_HOME:-/$HOME/.config}/qutebrowser"
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if [[ -d "$qt_dir" ]]; then
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cat "$tfile" >"$qt_dir/colorscheme.py"
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dbg_msg $app "Saved theme to $qt_dir/colorscheme.py"
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call_from_config "$qt_dir"
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dbg_msg="$dbg_msg Set theme $theme\n"
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include "$qt_dir"
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else
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dbg_msg $app "warn" "No qutebrowser configuration directory found"
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fi
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}
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call_from_config() {
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## Theme includer
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#
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# Makes sure that theme is actually included in
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# default application startup routine.
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# This is the most invasive step of theming since it
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# rewrites within existing configuration files.
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include() {
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local qt_dir="$1"
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dbg_msg $app "Including theme in configuration"
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if file_exists "$qt_dir/config.py"; then
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line_exists_or_append "$qt_dir/config.py" "config.source('colorscheme.py')"
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dbg_msg $app "Successfully included theme in configuration"
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else
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dbg_msg $app "warn" "No default configuration file found"
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fi
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}
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## Dependency Checker
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#
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# Makes sure the processor is called for the correct
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# base16 package, or refuses to run if it is not.
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if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
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theme_qutebrowser
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main
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else
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printf "Processor does not work for %s, please use another." "$package"
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dbg_msg $app "error" "Processor does not work for package $package"
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fi
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