Spring boot auto deploy script

spring-boot-auto-deploy.sh

#! /bin/bash

if [ $# -lt 3 ];
then
        echo "Please provide the project name, branch name and git user name"
else
        projectName=$1
        projectParentDir=/opt/$projectName
        branchName=$2
        gitUser=$3
        projectDir=$projectParentDir/project
        gitDir=/home/$gitUser

        echo "ProjectName: $projectName"
        echo "ProjectDirectory: $projectDir"
        echo "BranchName: $branchName"
        echo "GitDirectory: $gitDir"

        mkdir $projectParentDir
        mkdir $projectDir
        chown -R $gitUser:$gitUser $projectParentDir
        cd $gitDir
        git init --bare $projectName.git
        chown -R $gitUser:$gitUser $projectName.git
        cd $projectName.git/hooks
        cat > post-receive << EOD
#!/bin/bash
TARGET=$projectDir
GIT_DIR=$gitDir/$projectName.git
BRANCH=$branchName
while read oldrev newrev ref
do
        if [ "\$ref" = "refs/heads/\$BRANCH" ];
        then
                echo "Ref \$ref received. Deploying \$BRANCH to production..."
                git --work-tree=\$TARGET --git-dir=\$GIT_DIR checkout -f \$BRANCH
        else
                echo "Ref \$ref received. Doing nothing. Only the \$BRANCH branch is allowed to be deployed."
        fi
done
msg=\$(git log -1 --pretty=format:%s)
echo "Last commit: \$msg"
if [[ "\$msg" == '#'* ]]; then
        sn=\$(echo "\$msg" | cut -d '#' -f 2)                                                                           
        echo "Restarting \$sn..."
        sudo $projectParentDir/restart/\$sn
else
        echo "No service restarted. To auto restart, commit msg must start with #service-name#. Exp: #gateway-service#"
fi
EOD
        chown $gitUser:$gitUser post-receive
        chmod +x post-receive
        cd $projectParentDir
        mkdir restart
        mkdir media
        chown -R $gitUser:$gitUser restart
        chown -R $gitUser:$gitUser media
        git init --bare config.git
        chown -R $gitUser:$gitUser config.git
        cat > service-creator.sh <<- EOF
#!/bin/bash
if [ \$# -lt 1 ];
then
        echo "Please provide service name and optionally /subfolder name"
else
        sn=\$1
        sf=\$2
        cat > $projectParentDir/restart/\$sn << EOS
        cd $projectDir\$sf/\$sn
        sh mvnw clean
        sh mvnw package
        systemctl restart \$sn
        echo "\$sn is restarting..."
        systemctl status \$sn
        EOS
        chown $gitUser:$gitUser $projectParentDir/restart/\$sn
        chmod +x $projectParentDir/restart/\$sn
        echo "%wheel ALL=NOPASSWD: $projectParentDir/restart/\$sn" >> /etc/sudoers.d/$gitUser
        cat > /etc/systemd/system/\$sn.service << EOT
        [Unit]
        Description=\$sn
        After=syslog.target
        Type=simple

        [Service]
        User=$gitUser
        ExecStart=/usr/bin/java -jar $projectDir\$sf/\$sn/target/\$sn-0.0.1-SNAPSHOT.jar
        Restart=always
        StandardOutput=syslog
        StandardError=syslog
        SyslogIdentifier=\$sn
        SuccessExitStatus=143

        [Install]
        WantedBy=multi-user.target
        EOT
        chmod 644 /etc/systemd/system/\$sn.service
        systemctl enable \$sn
        systemctl start \$sn
fi
EOF
        chmod +x service-creator.sh
fi