Command to display directory tree structure ignoring everything in .gitignore

treeignore.sh

# Tested on AWS EC2 Linux

# tree -I '<pattern-to-ignore>' -> display tree
# grep -o '^[^#]*' .gitignore   -> remove comments in .gitignore
# | sed 's/\/$//g'              -> replace trailing '/' after directories
# | tr '\n' '|'                 -> join strings with '|'

tree -I $(grep -o '^[^#]*' .gitignore | sed 's/\/$//g' | tr '\n' '|')

# Tested on MacOSX

# tree -I '<pattern-to-ignore>' -> display tree
# grep -o '^[^#]*' .gitignore   -> remove comments in .gitignore
# | sed 's/\/$//g'              -> replace trailing '/' after directories
# | sed '/^$/d'                 -> delete newlines
# | tr '\n' '|'                 -> join strings with '|'
# | sed 's/|$//g'               -> remove the last '|'

tree -I $(grep -o '^[^#]*' .gitignore | sed 's/\/$//g' | sed '/^$/d' | tr '\n' '|' | sed 's/|$//g')