readme.md

Usage

$ curl -X GET https://gist.githubusercontent.com/rkaneko/817ef030dcb710266fdce2da327e00ec/raw/98f03e0c71777a99613581ff95eca9ff1228fc65/
changelog_between_git_tags.sh -s | bash -s -- -p 1.0.0 -c 1.1.0

changelog_between_git_tags.sh

#!/bin/bash

PROGNAME=$(basename $0)
VERSION="1.0"

usage() {
    echo "Usage: $PROGNAME [OPTIONS] FILE"
    echo "  This script is ~."
    echo
    echo "Options:"
    echo "  -h, --help"
    echo "      --version"
    echo "  -p, --prev-tag ARG"
    echo "  -c, --current-tag ARG"
    echo
    exit 1
}

get_tag_commit() {
    local TAG=$1
    # echo "tag: ${TAG}"
    local SHORT_COMMIT_HASH=`git rev-parse --short $TAG`
    echo $SHORT_COMMIT_HASH
}

show_commits_between_tags() {
    local FROM_COMMIT=$1
    local TO_COMMIT=$2
    git log --oneline $FROM_COMMIT..$TO_COMMIT | grep -v "Merge branch"
}

for OPT in "$@"
do
    case $OPT in
        -h | --help)
            usage
            exit 1
            ;;
        --version)
            echo $VERSION
            exit 1
            ;;
        -p | --prev-tag)
            if [[ -z "$2" ]] || [[ "$2" =~ ^-+ ]]; then
                echo "$PROGNAME: option requires an argument -- $1" 1>&2
                exit 1
            fi
            ARG_P=$2
            shift 2
            ;;
        -c | --current-tag)
            if [[ -z "$2" ]] || [[ "$2" =~ ^-+ ]]; then
                echo "$PROGNAME: option requires an argument -- $1" 1>&2
                exit 1
            fi
            ARG_C=$2
            shift 2
            ;;
        -- | -)
            shift 1
            param+=( "$@" )
            break
            ;;
        -*)
            echo "$PROGNAME: illegal option -- '$(echo $1 | sed 's/^-*//')'" 1>&2
            exit 1
            ;;
        *)
            if [[ ! -z "$1" ]] && [[ ! "$1" =~ ^-+ ]]; then
                #param=( ${param[@]} "$1" )
                param+=( "$1" )
                shift 1
            fi
            ;;
    esac
done

if [ -z "$ARG_P" ]; then
    echo "$PROGNAME: Option prev-tag is necessary"
    usage
    exit 1
fi

if [ -z "$ARG_C" ]; then
    echo "$PROGNAME: Option current-tag is necessary"
    usage
    exit 1
fi

PREV_TAG_COMMIT=`get_tag_commit $ARG_P`
CURRENT_TAG_COMMIT=`get_tag_commit $ARG_C`
show_commits_between_tags "$PREV_TAG_COMMIT" "$CURRENT_TAG_COMMIT"