get latest version of installed ungoogled chromium extensions

update_ungoogled_chromium_extensions.sh

#!/usr/bin/env bash

# dependencies:
# https://www.npmjs.com/package/chrome-web-store-item-property-cli
# https://stedolan.github.io/jq/
# curl

# configure these:
EXTENSIONS_DIR="/path/to/Chromium/Profile/Extensions" ## e.g. on macos ~/Library/Application Support/Chromium/Profile 1/Extensions
DOWNLOAD_DIR="/path/to/where/you/want/latest/extensions"
######################################################################################

CURDIR=`pwd`
cd $DOWNLOAD_DIR

for f in "$EXTENSIONS_DIR"/*; do
  ID=${f##*/}
  JSON=$(chrome-web-store-item-property $ID)
  NAME=$(echo $JSON | jq -r '.name')
  VERSION=$(echo $JSON | jq -r '.version')
  URL="https://clients2.google.com/service/update2/crx?response=redirect&prodversion=48.0&x=id%3D$ID%26installsource%3Dondemand%26uc"
  
  curl -s -L "$URL" > "$NAME-$VERSION.crx"
done

cd "$CURDIR"

Here's how to fill in prodversion:

CHROMVER=$(/usr/libexec/PlistBuddy -c 'print CFBundleShortVersionString' /Applications/Chromium.app/Contents/Info.plist)
MAJVER=$(awk -F. '{printf "%d.%d",$1,$2}' <<< "$CHROMVER")

Here's a new version which automatically compares your installed versions with remote versions, and downloads only newer extensions.

https://gist.github.com/Birch-san/a0d64dd9fd04ea2252eb362fcd3fc0e2