git push deployment using git hooks

gistfile1.md

git push deployment using git hooks

Run sshd in Docker container (Test only)

From Mac

docker run -itp 2222:22 alpine /bin/sh

From container

alias ll="ls -larth"
apk add --no-cache --update-cache openrc openssh git npm
ssh-keygen -A
mkdir /run/openrc/
touch /run/openrc/softlevel
rc-status
vi /etc/ssh/sshd_config
#Uncomment lines :
#  - UseDNS no
adduser xav
/etc/init.d/sshd start

From Mac

ssh-copy-id -i ~/.ssh/id_rsa -p 2222 xav@127.0.0.1
ssh -p '2222' 127.0.0.1

From container

vi /etc/ssh/sshd_config
#Uncomment lines :
#  - PasswordAuthentication no
/etc/init.d/sshd restart

Git push deploy

From container

sudo su 
apk add "git>2.28.0-r0" --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main # git 2.28.0 at least to use --initial-branch

su - xav
mkdir ~/app
git init --bare --initial-branch=main ~/git_push_deploy.git

Git hooh post-receive (in container)

vi ~/git_push_deploy.git/hooks/post-receive
# --- START ----------------------------------
#!/bin/ash

set -eo pipefail

main() {

  TARGET="/home/xav/app"
  GIT_DIR="/home/xav/git_push_deploy.git"
  BRANCH="main"

  while read oldrev newrev ref
  do
    # only checking out the main (or whatever branch you would like to deploy)
    if [ "$ref" = "refs/heads/$BRANCH" ];
    then
      echo "Ref $ref received. Deploying ${BRANCH} branch ..."
      git --work-tree=$TARGET --git-dir=$GIT_DIR checkout -f $BRANCH
    else
      echo "Ref $ref received. Doing nothing: only the ${BRANCH} branch may be deployed on this server."
    fi

    hasChanged package.json && {
      echo "package.json has changed: Running npm install --production" \
      && cd $TARGET \
      && npm install --production
    }

  done
}

getChangedFiles() {
  git diff-tree -r --name-only --no-commit-id $1 $2
}

hasChanged() {
  getChangedFiles $oldrev $newrev | grep -q "$1"
}

main
# --- END ------------------------------------

chmod +x ~/git_push_deploy.git/hooks/post-receive
vi /etc/passwd # Switch User shell to /usr/bin/git-shell (no usermod on Alpine)
# --- START ----------------------------------
xav:x:1000:1000:Linux User,,,:/home/xav:/usr/bin/git-shell
# --- END ------------------------------------

From Mac

cd ~/$MY_APP
git remote add dev ssh://xav@127.0.0.1:2222/home/xav/git_push_deploy.git # dev can be replaced with anything; Ex: prod, staging, etc ...
git push dev main