A POSIX Compliant SemVer Parser in Pure Bash

example--parse-semver-with-bash.sh

#!/usr/bin/env bash

VERSION="${1#[vV]}"
VERSION_MAJOR="${VERSION%%.*}"
VERSION_MINOR_PATCH="${VERSION#*.}"
VERSION_MINOR="${VERSION_MINOR_PATCH%%.*}"
VERSION_PATCH_PRE_RELEASE="${VERSION_MINOR_PATCH#*.}"
VERSION_PATCH="${VERSION_PATCH_PRE_RELEASE%%[-+]*}"
VERSION_PRE_RELEASE=""

case "$VERSION" in
  *-*)
    VERSION_PRE_RELEASE="${VERSION#*-}"
    VERSION_PRE_RELEASE="${VERSION_PRE_RELEASE%%+*}"
    ;;
esac

echo "Version: ${VERSION}"
echo "Version [major]: ${VERSION_MAJOR}"
echo "Version [minor]: ${VERSION_MINOR}"
echo "Version [patch]: ${VERSION_PATCH}"
echo "Version [pre-release]: ${VERSION_PRE_RELEASE}"

Okay, I've patched it. I will add comments later around what's happening where as parameter expansion in Bash can be confusing.

@bitmvr Cool thanks a lot, I think that as much as SemVer is popular, we actually (if I am not mistaken) miss generally well available installed everywhere typ of tool to actually parse semver, to use in GitHub actions, and build scripts, etc. so your script is actually very handy :-)