gitlab-changelog.sh

# Considering that your app version is stored in VERSION.md file
#
# Example: ./gitlab-changelog.sh
# Example: ./gitlab-changelog.sh <YOUR-GITLAB-PROJECT-ACCESS-TOKEN>

#!/bin/bash

app_version=$(cat VERSION.md)
branch=dev

link=https://gitlab.com/<project-path>/-/blob/${branch}/CHANGELOG.md

# You can retrieve env variables from script arguments (here 1st argument)
GITLAB_PROJECT_ACCESS_TOKEN=$1

# Or parse .env file
GITLAB_PROJECT_CHANGELOG_API=$(cat ./.env \
  | grep GITLAB_PROJECT_CHANGELOG_API \
  | head -1 \
  | awk -F= '{ print $2 }')
  
 if [ -z "${GITLAB_PROJECT_CHANGELOG_API}" ]; then echo "Cannot find GITLAB_PROJECT_CHANGELOG_API env variable"; exit -1; fi

response=$(curl --write-out '%{http_code}' --request POST --header "PRIVATE-TOKEN: ${GITLAB_PROJECT_ACCESS_TOKEN}" --data "version=${app_version}&branch=${branch}" "${GITLAB_PROJECT_CHANGELOG_API}")

if [ $response == 200 ]
then echo "Updated changelog: ${link}"
else echo "An error occurred when requesting GitLab API"
fi;