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Unique symlink name inside /tmp #21

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Unique symlink name inside /tmp #21

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33 changes: 30 additions & 3 deletions discocss
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,33 @@ confdir="${XDG_CONFIG_HOME:=$HOME/.config}/discocss"
preloadFile="$confdir/preload.js"
cssFile="$confdir/custom.css"

# Generate random fixed-width ID using $1 param as seed.
gen_id() {
WIDTH=7

ASCII=""
SEED=""
# Decode string into ascii values, seed must be numerical
for i in $(seq ${#1})
do
LETTER=$(echo "$1" | cut -c "$i")
ASCII=$(printf "%d" "'$LETTER")
SEED="${SEED}${ASCII}"
done

SEED=$((SEED % 4294967295))

ID=$(awk -v s=$SEED 'BEGIN { srand(s); print int(rand()*32768) }' /dev/null)
while [ ${#ID} -lt $WIDTH ]
do
ID="$(awk -v s="$ID" 'BEGIN { srand(s); print int(rand()*32768) }' /dev/null)${ID}"
done
ID=$(echo "$ID" | cut -c "-${WIDTH}")
}
gen_id "$USER"

preloadLink="/tmp/discocss-${ID}.js"

mkdir -p "$confdir"

touch "$cssFile"
Expand Down Expand Up @@ -60,7 +87,7 @@ module.exports.mo = (options) => {
};
EOF

ln -f -s "$preloadFile" /tmp/discocss-preload.js
ln -f -s "$preloadFile" "$preloadLink"

if [ "$(uname)" = "Darwin" ]; then
sed_options='-i ""'
Expand All @@ -70,8 +97,8 @@ else
core_asar="$(echo "$XDG_CONFIG_HOME/discord/"*"/modules/discord_desktop_core/core.asar")"
fi

app_preload_replace='s| // App preload script, used to provide a replacement native API now that|try {require\(`/tmp/discocss-preload.js`)()} catch \(e\) {console.error\(e\);} |'
launch_main_app_replace='s|// launch main app window; could be called multiple times for various reasons| const dp = require(`/tmp/discocss-preload.js`); |'
app_preload_replace='s| // App preload script, used to provide a replacement native API now that|try {require\(`'"$preloadLink"'`)()} catch \(e\) {console.error\(e\);} |'
launch_main_app_replace='s|// launch main app window; could be called multiple times for various reasons| const dp = require(`'"$preloadLink"'`); |'
frame_true_replace='s| mainWindowOptions.frame = true;|}dp.mo(mainWindowOptions);{ |'
causing_the_window_replace='s|// causing the window to be too small on a larger secondary display| dp.mw(mainWindow); |'
LC_ALL=C sed $sed_options "$app_preload_replace; $launch_main_app_replace; $frame_true_replace; $causing_the_window_replace" \
Expand Down