[Crash Gitlab Pipeline by Deleting an Empty Line.] #Bug

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bug fun

Crash Gitlab Pipeline by Deleting an Empty Line.

In the CI process, there are some lines about setting configuration files like this:

- docker exec webcontainer bash -c "cat .env.gitlab-ci >> .env"

The .env.gitlab-ci is like this:

DATABASE_URL=mysql://xxx:yyy@dbcontainer:3306/dbname?serverVersion=5.7

The .env is like this:

# some useful stuff bablala

LOCK_DSN=semaphore  
###< symfony/lock ###

What I did is removing the empty line in end of .env, then it became:

# some useful stuff bablala

LOCK_DSN=semaphore  
###< symfony/lock ###

Then the pipeline failed and gave an error:

An exception occurred in the driver: SQLSTATE[HY000] [2002] Connection refused

WHY?

Because the deleted empty line matters. With it, the .env would be like:

# some useful stuff bablala

LOCK_DSN=semaphore  
###< symfony/lock ###
DATABASE_URL=mysql://xxx:yyy@dbcontainer:3306/dbname?serverVersion=5.7

Without it, .env would be like:

# some useful stuff bablala

LOCK_DSN=semaphore  
###< symfony/lock ###DATABASE_URL=mysql://xxx:yyy@dbcontainer:3306/dbname?serverVersion=5.7

Bingo! The db connection gets crashed!!!

So, don't messy up empty lines. They matter.