Completes 406: stores the content of keybindings variable in a file for reuse.

[arkochan]

This pull requests holds upgrade to hypr/scripts/keybindings.sh as i mentioned before on #406.

1. Rather than generating the keybinds variable from the keybind .conf (eg. hypr/keybindings/default.conf) file each time hypr/scripts/keybindings.sh script is ran, it is be generated once after each modification to keybind .conf file selected by user.

2. This variable is saved as [configfile.conf]_[unix_time_stamp].help file. the unix time stamp indicates the last time the config file is modified. if it dosent match the help file is regenerated according to the keybinds variable and older .help file is removed. The .help extension might not be the best choice. and i am a bit confused with the extension name. Also the help file is stored in the same directory as the conf direcotry. (eg .config/hypr/conf/keybindings by default)

This is my first PR in an open source project. Please do guide me if mistakes are made.

[Stewart86]

@arkochan hope you don't mind that I tested out your script and added a few modification to my own, as I also felt that the rofi is taking too long to show. Your idea has significantly improved the performance.

As this is your PR, you decide if you want to include my suggestion in. Here are what I discovered.

1. reading $mainMod from file instead of hardcoded "SUPER" key. Personally I use "ALT" key for my $mainMod so had to change the script a little. or we can simply use this line in your script.

mod_key=$(rg "^*mainMod =" <"$config_file" | awk '{print $3}')

2. Your "help" file feels a lot like a "cache" file. I suggest that you store it in '$XDG_CACHE_HOME'.
3. remove sleep from the script. There might be a reason why sleep is there, but from my test, it was okay without it, so I don't know about this.

In any case, I will just paste the modified script here for your to reference.

config_file=~/.config/hypr/conf/keybinding.conf
config_file=${config_file/source = ~/}
config_file=${config_file/source=~/}
cache_dir=${XDG_CACHE_HOME:-$HOME/.cache}
cache_file_prefix=.hypr_keymaps_

echo "Reading from: $config_file"
mod_key=$(rg "^*mainMod =" <"$config_file" | awk '{print $3}')
generated_filename="$cache_dir/$cache_file_prefix$(stat -c '%Y' "$config_file")"

keybinds=""

if [ -f "$generated_filename" ]; then
    echo "Help file for $config_file already exists in $generated_filename"
    keybinds=$(cat "$generated_filename")
else
    echo "Generated cache with similar modification time not found. Removing any other cache files"
    rm -f "$cache_dir"/"$cache_file_prefix"
    echo "Generating new cache for $config_file"
    while read -r line; do
        if [[ "$line" == "bind"* ]]; then

            line=${line/\$mainMod/$mod_key}
            line=${line/bind = /}
            line=${line/bindm = /}

            IFS='#'
            read -a strarr <<<"$line"
            kb_str=${strarr[0]}
            cm_str=${strarr[1]}

            IFS=','
            read -a kbarr <<<"$kb_str"

            item="${kbarr[0]}  + ${kbarr[1]}"$'\r'"${cm_str:1}"
            keybinds=$keybinds$item$'\n'
        fi
    done <"$config_file"
    echo "$keybinds" >"$generated_filename"
fi

rofi -dmenu -i -markup -eh 2 -replace -p "Keybinds" -config ~/.config/rofi/config-compact.rasi <<<"$keybinds"

[Stewart86]

hmm..... you know what? I just discovered that we don't need that help file to be fast. it is just the inefficient code that is making it slow.

instead of using echo pipe to sed to replace the string

        line="$(echo "$line" | sed 's/$mainMod/ALT/g')"
        line="$(echo "$line" | sed 's/bind = //g')"
        line="$(echo "$line" | sed 's/binde = //g')"
        line="$(echo "$line" | sed 's/bindm = //g')"

do this, and keep everything else as usual.

        line=${line/\$mainMod/ALT}
        line=${line/bind = /}
        line=${line/bindm = /}
        line=${line/binde = /}

🤯 🤯

[Stewart86]

I have definitely gone too far. 😶 😅 Rewrote the entire script with another >100% speed improvement.

Here is my entire script

#!/bin/bash

config_file=~/.config/hypr/conf/keybinding.conf
echo "Reading from: $config_file"

mod_key=$(rg "^*mainMod =" <"$config_file" | awk '{print $3}')
binds=$(rg "^bind* =" <"$config_file" |
    awk -F, '{print $1,"+", $2, "\r#",$3,$4}' | # added # after \r to easily capture unwanted strings
    sed 's/bind* = //g' | # remove "bind = "
    sed "s/\$mainMod/$mod_key/g" | # replace $mainMod
    sed 's/#.*#//g') # remove execution commands containing withing #<unwanted>#

rofi -dmenu -i -markup -eh 2 -replace -p "Keybinds" -config ~/.config/rofi/config-compact.rasi <<<"$binds"