App Engine Cloud Build throwing incorrect composer install error

Question

So...I have a weird one. I have a composer.json file formatted like this:

{
    "require": {
        "twilio/sdk": "^6.20"
    },
    "autoload": {
        "classmap": [
            "model/*"
        ]
    }
}

And I am trying to deploy a PHP application with that composer.json to an App Engine app service. But, when Cloud Build runs composer install --no-dev --no-progress --no-suggest --no-interaction while building the application, Composer throws this error:

Step #6 - "builder": 
Step #6 - "builder":                                                                                                  
Step #6 - "builder":   [RuntimeException]                                                                             
Step #6 - "builder":   Could not scan for classes inside "model/*" which does not appear to be a file nor a folder  
Step #6 - "builder":                                                                                                  
Step #6 - "builder":

The problem is, when I run that exact command in the directory App Engine is building, I generate the autoload classes fine.

There is one class recursively in the model folder right now.

Also, when I remove the autoload section from the composer.json, it deploys to app engine just fine, and I have verified the existence of the directory in the deployed app files.

So my question is:

Why is Cloud Build getting a composer error that I can't reproduce locally?

---- EDIT ----

My file structure looks like this:

rob006 rob006 · Accepted Answer · 2021-03-30T18:43:55

Wildcard is supported in classmap path since Composer 2.0. I assume that during build Composer 1.x is used, and it does not recognize this syntax.

I suggest to just remove asterisk from path, since the meaning is exactly the same and it works on older Composer too.

"autoload": {
    "classmap": [
        "model/"
    ]
}

App Engine Cloud Build throwing incorrect composer install error

2 Answers