Refactor theme_qutebrowser to use utility functions

This commit is contained in:
Marty Oehme 2020-01-31 12:15:39 +01:00
parent c29f9528ec
commit 7e709be5a0

View file

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