Tips and tricks
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Mac Automator - Create a folder and ignore it in Dropbox
Launch Automator
Select Quick Action
in the top, receives: files or folder in Finder.app
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Add a Run Shell Script, and set Pass input: as arguments
in the bash run:
cat > text.txt
for f in "$@"
do
mkdir "$f/node_modules"
xattr -w com.dropbox.ignored 1 "$f/node_modules"
done