SDI/changelog_parser.sh

#!/bin/bash

function parse() {
    version="$1"

    while IFS= read -r line && [ -z "`echo "$line" | grep -e "^#\+ $version"`" ]
    do
        : # do nothing
    done

    while IFS= read -r line && [ -z "`echo "$line" | grep -e "^#\+"`" ]
    do
        echo "$line"
    done
}

version="$1"
file="$2"

if [ -n "$file" ]; then
  parse "$version" < "$file"
else
  parse "$version"
fi