October: Composer install stuck: "Something's changed, looking at all rules again (pass #789)"

[idpsycho]

• OctoberCMS Build: new installation from 2020 (googled and read 10 pages, cant find how to find ocms version from console)
• PHP Version: PHP 7.3.11
• Plugins Installed: none

Description:

composer install gets stuck on:

Updating dependencies (including require-dev)

When run with composer i -vvv i get this:
Reading /Users/psycho/.composer/cache/repo/https---repo.packagist.org/provider-symfony$filesystem.json from cache Reading /Users/psycho/.composer/cache/repo/https---repo.packagist.org/provider-marc-mabe$php-enum.json from cache Reading /Users/psycho/.composer/cache/repo/https---repo.packagist.org/provider-icecave$parity.json from cache Reading /Users/psycho/.composer/cache/repo/https---repo.packagist.org/provider-icecave$repr.json from cache Resolving dependencies through SAT Looking at all rules. Something's changed, looking at all rules again (pass #2944)

Steps To Reproduce:

Happens in two different projects by two different people, roughly both got created about 2 months ago, so starting 2020. RIght now, i tried to install those for the first time ever, and my composer install is getting stuck. What solves the problem is to create a new project and copy config+plugins+themes there.

I googled for this problem, it has happened to others, but the solutions didnt match october environment, so I think this is new bug.

I have cloned and installed like 20 october projects in last week, so this is either very recent (today), or must be related to a very specific build from around 2020-03-01.

Update: it started happening on a project that worked just few hours ago. Possibly some very fresh issue.

[bennothommo]

@idpsycho Just to clarify, are you saying that you were able to install these projects 2 months ago when they started, but you cannot now - ie. you're moving the projects to a different environment?

[idpsycho]

Okay, so the issue is that the developer changed his platform php dependency from 7.0.8 to 7.2.0 after he encountered the wikimedia issue. If I just change the platorm php back to 7.0.8, it doesnt break (it breaks on the old wikimedia bug)

Reading /Users/psycho/.composer/cache/repo/https---repo.packagist.org/provider-icecave$repr.json from cache
Resolving dependencies through SAT
Looking at all rules.
Something's changed, looking at all rules again (pass #4)
Dependency resolution completed in 1.625 seconds
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for wikimedia/composer-merge-plugin dev-master -> satisfiable by wikimedia/composer-merge-plugin[dev-master].
    - wikimedia/composer-merge-plugin dev-master requires php >=7.2.0 -> your PHP version (7.3.11) overridden by "config.platform.php" version (7.0.8) does not satisfy that requirement.

Okay, so the solution is to NOT DO THIS:

    "config": {
        "preferred-install": "dist",
        "platform": {
            "php": "7.2.0"
        }
    },

put it back to original value of

            "php": "7.0.8"

SOLUTION
and if you have old project, the only thing needed to fix it is to change require from:

"wikimedia/composer-merge-plugin": "dev-master"

to the value that is being used in latest october installations:

"wikimedia/composer-merge-plugin": "1.4.1"

[bennothommo]

@idpsycho Thanks for the clarification. You are indeed correct - we have fixed this in develop and master already, but some installs may have already been done before the fix was in place.