a tiny script for outputting changelog diff between releases for (semver)

semverdiff.sh

#!/bin/bash

# Usage
# chmod +x semverdiff.sh
# Get diff between 1.0.0..1.0.1
# ./semverdiff 1.0.1 

get_diff() {
    sed -n "/^## \[$1\]/,/^## /p" CHANGELOG.md | egrep "^(-|\s+)"
}

if [[ $1 =~ ^[0-9].[0-9].[0-9]$ ]]; then
    get_diff $1
else   
    echo "empty or invalid tag"
    exit 1
fi