parsing-versions.sh

# This is a sanity check to make sure we're parsing major, minor, patch versions correctly
➜  ~ echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/major=\1, minor=\2, patch=\3/g'
major=123, minor=456, patch=789

# These parse out each of the parts
➜  ~ echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\1/g'
123
➜  ~ echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\2/g'
456
➜  ~ echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\3/g'
789

# These set the shell variables
➜  ~ MAJOR_VERSION=$(echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\1/g')
➜  ~ MINOR_VERSION=$(echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\2/g')
➜  ~ PATCH_VERSION=$(echo 'abcdeef-v123.456.789 blah' | sed -E 's/.*-v([0-9]+)\.([0-9]+)\.([0-9]+).*/\3/g')

# This one echoes the versions, and shows how to up the patch number. You need double quotes, not
#  single, because single quotes cause bash variables to not be expanded. Using single quotes is
#  good for the regexes above though so that special characters are not expanded by bash (like *!$)
➜  ~ echo "major=$MAJOR_VERSION, minor=$MINOR_VERSION, patch=$PATCH_VERSION"
major=123, minor=456, patch=789

# Addition yay!
➜  ~ echo "next patch version=$MAJOR_VERSION.$MINOR_VERSION.$((PATCH_VERSION+1))"
next patch version=123.456.790