newversion

#!/bin/sh

# Current version from `VERSION.txt`.

version_file=$(cd "$(dirname "$0")" && pwd)/VERSION.txt

old_version=$(cat "$version_file")

old_major_version=$(echo $old_version | cut -d. -f1)
old_minor_version=$(echo $old_version | cut -d. -f2)
old_patch_version=$(echo $old_version | cut -d. -f3)

# Determine the new version based on the current version and the current date.

now=$(date +%Y%m%d)

new_major_version=$old_major_version
new_minor_version=$now

if [ $old_minor_version -lt $now ]; then
  new_patch_version=0
else
  new_patch_version=$(($old_patch_version + 1))
fi

new_version="$new_major_version.$new_minor_version.$new_patch_version"

# Update our version file.

echo "$new_version" > "$version_file"

# Display the old and new versions.

printf '\033[1mOld version:\033[0m %s\n' "$old_version"
printf '\033[1mNew version:\033[0m %s\n' "$new_version"