Installing extra modules in PHP 7.3 in Codebuild

Question

We are attempting to install an extra module into PHP however getting an error when we enable amazon linux extras:   
  
From the build log:

```
Running command /usr/bin/amazon-linux-extras enable php7.3 
/usr/local/bin/python: No module named amazon_linux_extras
 ```

Relevent section of Buildspec (in the install phase):

```
    commands:
      - php -v
      - yum -y install amazon-linux-extras yum-utils python-boto
      - /usr/bin/amazon-linux-extras enable php7.3
      - yum install -y php-mcrypt 
```

What are we missing????

Answer

Hi jorgr,  
  
We do not add amazon-linux-extras as a module for Python 3. You can copy this module from  
Python 2 to Python 3 by using the following command:

```
cp -r /lib/python2.7/site-packages/amazon_linux_extras /usr/local/lib/python3.7/site-packages
```

Best,  
Zhen

Answer

Correct command to copy the module would be:

```
cp -r /usr/lib/python2.7/site-packages/amazon_linux_extras /usr/local/python37/lib/python3.7/site-packages
```

Answer

As noted in another reply, amazon-linux-extras is only available under python 2. Python 2 is officially sunsetted. Now that python defaults to python3 in Amazon Linux 2, this has broken `amazon-linux-extras` and AWS should address the issue.  
  
After inspecting the script `amazon-linux-extras`, I saw that if the variable PYTHON is not defined, it uses `python` by default. To work around, rather than copying any files, we can simply tell it to use python 2:

```
PYTHON=python2 amazon-linux-extras enable 
```

Installing extra modules in PHP 7.3 in Codebuild

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