Automatically increment project version on each commit to main (on pre commit)

new pre commit

#!/bin/sh
# new pre commit

# get bundle version
bundle_ver=`cat ./ProjectSettings/ProjectSettings.asset | grep bundleVersion | cut -d ' ' -f 4`

# explanation:
# cat - concatenate the content of multiple files
# cat [option] [file]
# cut command is a fast way to extract parts of lines of text files
# -d is a delimiter
# -f is a field-based selection

# get last character
last_digit="${bundle_ver: -1}"

# increment last digit
incr_digit=$((last_digit+1))

# replace last digit of bundle version with new digit
new_ver=${bundle_ver%?}$incr_digit

# write to project settings file
sed -i -e '/bundleVersion/ s/:.*/: '"$new_ver"'/' ./ProjectSettings/ProjectSettings.asset

# remember to git add
git add ./ProjectSettings/ProjectSettings.asset