Errors occur trying to write composer caches

[ScopeyNZ]

This package uses Composer API to get information about packages. When this happens, composer attempts to write caches to the configured cache directory (.composer) using the COMPOSER_HOME or HOME environment variable. This causes errors on CWP where the .composer parent directory is not writable (this comes from HOME).

We have anticipated this in bringyourownideas/silverstripe-composer-update-checker: https://github.com/bringyourownideas/silverstripe-composer-update-checker/blob/1/src/Extensions/ComposerLoaderExtension.php#L100-L112

This code should be migrated to this module.

This causes Greylog to be flooded with errors.

[ScopeyNZ]

Raising the priority. I realised that it's quite likely environments have a HOME environment variable defined - if this is not writable then the extension code won't resolve the issue. We should probably just rely on COMPOSER_HOME, the fallback to HOME seems a little unsafe - although usually you would expect HOME to be writable...

[indygriffiths]

Has there been any movement on this issue? The "permission denied" error from this module and the update checker has chewed through about a quarter of our monthly Raygun error allocation.

[robbieaverill]

@indygriffiths would you like to try the patch on the platform? That's really all that's holding this up

[robbieaverill]

See bringyourownideas/silverstripe-composer-update-checker#43 (review)

[brynwhyman]

@indygriffiths have you had a chance to test this patch? If not, I'll get the team to look at it this week. Sorry for the delay on this one.

[robbieaverill]

Fixed in #42 and #43