Script to generate changelogs from git commit record

git_changelog.bash

#!/bin/bash
#
# fail if any commands fails
set -e
# debug log
set -x

if [ ! -e ${env.APP_TAG_NAME} ]
then
    echo "${env.APP_TAG_NAME} not found. Exiting..."
    exit 1
fi

APP_TAG=\$(cat ${env.APP_TAG_NAME})

# fetch tags, to be sure we have all the require info
git fetch --tags

GIT_CHANGELOG_HEADER=$(echo "## Changelog")

# collect the commits since the last tag

LAST_TAG=$(git describe --tags --match "native*" --abbrev=0)

GIT_CHANGELOG=\$(git log --decorate=full --grep="\[Apps\]" --notes --merges $LAST_TAG..HEAD | grep "\[Apps\]" | sed s/.Apps./\*/)

GIT_CHANGELOG=\$(echo -e "$GIT_CHANGELOG_HEADER\n$GIT_CHANGELOG")

GIT_TRUNCATED_CHANGELOG=\$(echo "$GIT_CHANGELOG" | head -c 5000)

# save changelog as file

echo "$GIT_TRUNCATED_CHANGELOG" | tee changelog_android.md