[styler] Add universal theme filter function
Added universal theme filtering. Universal means the theme exists for each installed package. This is a (rough) way of knowing that it can apply to every intended application -- though of course will not work if more packages are installed than intended to be changed with processors. The `styler list themes` command will default to only show universal themes. To list all themes invoke with `styler list themes all`. Styler will cache the available themes after the first retrieval. The first retrieval still takes a while (~8.7 seconds for me), but subsequent retrievals are much quicker. Cache will automatically be rebuilt whenever a new package is downloaded, or an already downloaded package is updated. The filter function, as it stands it quite inefficient and could use a better algorithm. Uses rg or grep in descending preference.
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1 changed files with 119 additions and 9 deletions
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@ -1,11 +1,26 @@
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#!/usr/bin/env bash
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readonly BASE_PATH="${STYLER_DATA_PATH:-${XDG_DATA_HOME:-$HOME/.local/share}/styler}"
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readonly CACHE_PATH="${STYLER_CACHE_PATH:-${XDG_CACHE_HOME:-$HOME/.cache}/styler}"
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readonly PACKAGE_PATH="$BASE_PATH/packages"
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readonly PROCESSOR_PATH="$BASE_PATH/processors"
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readonly VERSION="0.3.0"
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readonly VERSION="0.4.1"
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# ensures that some grep-like program is available, prefers rg
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setgrepper() {
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if command -v rg 1>/dev/null 2>&1; then
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GREPPER="rg"
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elif command -v grep 1>/dev/null 2>&1; then
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GREPPER="grep"
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else
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notify-send "grep missing" "styler needs grep, or preferably rg to work."
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echo "grep missing!" "styler needs grep, or preferably rg to work."
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exit 127
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fi
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}
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setgrepper
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main() {
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local cmd=""
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@ -34,7 +49,7 @@ main() {
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esac
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shift
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$cmd "$1"
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$cmd "$@"
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ret=$((ret + $?))
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exit $ret
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}
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@ -56,6 +71,8 @@ usage() {
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" Same as 'theme' option, but changes will be made permanent." \
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"" \
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" list [processors|packages|themes] Print out all currently installed processors, templates, or themes from selection. " \
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" list themes Will print out themes which are available for all installed packages." \
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" list themes all Will print out every single installed theme, regardless of its universal availability." \
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"" \
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" download [username/repository] Download a base16 template into the package directory or download a processor16" \
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" into the processor directory. Use user/repo format to automatically pull from github." \
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@ -99,7 +116,7 @@ get_processors() {
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for processor in "$package"/*; do
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[[ -e "$processor" ]] || break
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[[ -f "$processor" ]] || break
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if grep -q -e '/theme_[[:alnum:]]\{1,\}$' <<<"$processor"; then
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if ${GREPPER} -q -e '/theme_[[:alnum:]]\{1,\}$' <<<"$processor"; then
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printf "%s\n" "$(basename -- "$processor")"
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fi
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done
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@ -107,11 +124,103 @@ get_processors() {
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done
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}
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# retrieves all installed themes from all packages, appends applications they exist for
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# retrieves all installed themes available to all packages
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# can be called with `all` argument to return themes which only exist for some packages
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get_themes() {
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local themes
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themes=$(find "$PACKAGE_PATH" -type f -name 'base16-*')
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echo "$themes" | sed "s/.*\\/base16-//" | sed "s/\\..*//" | sort | uniq
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local filtered
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if [[ "$1" = "all" ]]; then
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filtered="$(get_unique_themes "$themes")"
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else
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filtered="$(get_universal_themes "$themes")"
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fi
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echo "$filtered"
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}
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# filter down the list passed in to keep repeating base16 themes only once per name
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# and remove surrounding path information (and file ending)
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get_unique_themes() {
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if _cache_invalid "$CACHED_UNIQUE_THEMES" "$PACKAGE_PATH"; then
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notify-send "styler cache invalid" "rebuilding cache will take a moment..."
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_cache_rebuild "$CACHED_UNIQUE_THEMES" _fetch_unique_themes "$@"
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else
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cat "$CACHED_UNIQUE_THEMES"
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fi
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}
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readonly CACHED_UNIQUE_THEMES=${CACHE_PATH}/unique_themes
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# returns themes which are available in all installed packages
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# returns cached version or rebuilds cache
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get_universal_themes() {
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if _cache_invalid "$CACHED_UNIVERSAL_THEMES" "$PACKAGE_PATH"; then
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notify-send "styler cache invalid" "rebuilding cache will take a moment..."
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_cache_rebuild "$CACHED_UNIVERSAL_THEMES" _fetch_universal_themes "$@"
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else
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cat "$CACHED_UNIVERSAL_THEMES"
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fi
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}
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readonly CACHED_UNIVERSAL_THEMES=${CACHE_PATH}/universal_themes
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_fetch_unique_themes() {
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echo "$1" | sed "s/.*\\/base16-//;s/\\..*//" | sort | uniq
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}
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# only keep themes which are available in every installed package
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_fetch_universal_themes() {
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local themes="$1"
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local unique
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unique="$(get_unique_themes "$themes")"
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local packages
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packages="$(get_packages)"
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local filtered
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for t in $unique; do
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for p in $packages; do
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if ! echo "$themes" | ${GREPPER} -qe "^.*$p.*$t.*$" -; then
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themes="$(echo "$themes" | sed "/$t/d")"
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unique="$(echo "$unique" | sed "/$t/d")"
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break
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fi
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done
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done
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echo "$unique"
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}
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# returns true if changes to $2 are newer than $1
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# used to pass in cache file for $1, what it is caching for $2
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_cache_invalid() {
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cache_upd="$(_last_update "$1")"
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live_upd="$(_last_update "$2")"
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if [ "${live_upd%.*}" -gt "${cache_upd%.*}" ]; 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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# recreates target cache with output of function
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# arguments: "target_cache_file" "function_name" "arguments_for_function"
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_cache_rebuild() {
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local target="$1"
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shift
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local fct="$1"
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shift
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local new
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new="$($fct "$@")"
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mkdir -p "$CACHE_PATH"
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echo "$new" | tee "$target"
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}
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# returns time of last update to argument passed in
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# argument can be path to file or directory (searched recursively)
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# if argument does not exist gives 0
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_last_update() {
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[[ ! -e "$1" ]] && echo 0 && return
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find "$1" -type f -printf "%T@\n" | sort -n | tail -n 1
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}
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# temporarily switch theme, same thing as setting, only with permanence flag turned off for processors
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@ -152,7 +261,7 @@ set_theme() {
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appext=$(sed -e 's|^[A-Za-z0-9-]\{1,\}/base16-||' <<<"$pkg")
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# Compares application extension with existing processors and runs the appropriate processor if found
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processor=$(find "$PROCESSOR_PATH" -type f | grep -e "theme_$appext")
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processor=$(find "$PROCESSOR_PATH" -type f | ${GREPPER} -e "theme_$appext")
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if [[ -f "$processor" ]]; then
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"$processor" "$PACKAGE_PATH" "$pkg" "$theme" "$permanent"
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else
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@ -164,6 +273,7 @@ set_theme() {
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list() {
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local selected="$1"
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shift
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case "$selected" in
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packages)
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@ -173,7 +283,7 @@ list() {
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get_processors
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;;
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themes)
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get_themes
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get_themes "$@"
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;;
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*)
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echo "Please select one of packages | processors | themes to list."
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@ -205,9 +315,9 @@ download() {
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# if package has patter name/base16-program, put it in packages; if name/process16-program put it in processors
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# if none of the above, assume it's a processor but warn the user
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if grep -q -e '^[0-9A-Za-z-]\{1,\}/base16-[0-9A-Za-z-]\{1,\}$' <<<"$pkg"; then
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if ${GREPPER} -q -e '^[0-9A-Za-z-]\{1,\}/base16-[0-9A-Za-z-]\{1,\}$' <<<"$pkg"; then
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git clone "$repo" "$PACKAGE_PATH/$pkg"
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elif grep -q -e '^[0-9A-Za-z-]\{1,\}/process16-[0-9A-Za-z-]\{1,\}$' <<<"$pkg"; then
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elif ${GREPPER} -q -e '^[0-9A-Za-z-]\{1,\}/process16-[0-9A-Za-z-]\{1,\}$' <<<"$pkg"; then
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git clone "$repo" "$PROCESSOR_PATH/$pkg"
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else
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echo "Package does not fit default naming scheme of packages/processors. Assuming it is a processor but please check manually."
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