Sometimes when developing you end up with a duplicate copy of a module somewhere, and this causes a lot of headscratching when you make changes in one copy and Drupal is actually using the other one. There doesn't seem to be a good reason to allow this situation where Drupal just arbitrarily selects one version of the module to use, so to avoid many man hours of debugging time we should detect this situation and report an error rather than leave it for the developer to track down.

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longwave created an issue. See original summary.

longwave’s picture

longwave
he/him
Primary language English
Location UK
CreditAttribution: longwave commented
Related issues: +#2472119: Extension installers allow extensions with duplicate names to be enabled

Related to #2472119: Extension installers allow extensions with duplicate names to be enabled but that deals with enabling modules and themes with the same name, this can occur if an already enabled extension suddenly exists twice in the filesystem.

dawehner’s picture

dawehner
Primary language German
CreditAttribution: dawehner as a volunteer commented

Well that is tricky. There is this even feature that you can override one module with another version in a more specific directory.

Wim Leers’s picture

Wim Leers
Location Ghent 🇧🇪🇪🇺
CreditAttribution: Wim Leers at Acquia commented

I ran into this today.

I had /modules/big_pipe and /modules/big_pipe_broken_git. I was working on /modules/big_pipe, but my changes had no effect. It was maddening. Turns out Drupal was actually using /modules/big_pipe_broken_git. We should at least make sure to prefer the directory name matching the module name.

Then again, it's kind of PEBKAC.

Not sure.

dawehner’s picture

dawehner
Primary language German
CreditAttribution: dawehner as a volunteer commented

We should at least make sure to prefer the directory name matching the module name.

Wel yeah we could do at least that, but its kinda magic.

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