Plugin update: Translation update fails with "Invalid Data provided"

[pavelevap]

When updating plugin from Plugins screen, there is following message: "Invalid Data provided." during automatic language packs update. When updating the same plugin through Dashboard - Updates, then everything works.

[SergeyBiryukov]

Might be related to #29230.

[ocean90]

The message comes from Plugin_Upgrader::deactivate_plugin_before_upgrade() where $plugin['plugin'] is empty.

29425.patch​ goes the same, drastic way as [29621].

[dd32]

Four filters are used:

• upgrader_source_selection handled by [29621]
• upgrader_pre_install handled by 29425.patch​
• upgrader_clear_destination used to delete old plugins prior to plugin install. Should be cleared too IMHO.
• upgrader_post_install used for parent theme installs. No idea if this will cause issues, but might as well clear it too?

[dd32]

upgrader_pre_install handled by 29425.patch​

All testing shows that this is indeed a problem, and the patch indeed does fix it. I can't find anything wrong with it.

upgrader_clear_destination used to delete old plugins prior to plugin install.

This one isn't triggered as 'clear_destination' is set to false in the Translation update call.

upgrader_post_install used for parent theme installs. No idea if this will cause issues, but might as well clear it too?

The Theme_Upgrader::check_parent_theme_filter method gets called for the Translation update, but it passes in the event the parent theme has been installed, Ideally this shouldn't be run, as although it degrades gracefully for me, I can't say it'll always be so.

When you take the above into account with someone using a custom upgrader in a premium theme or similar, we can't trust anything hooked to these filters, so we should just blow them all away IMHO. 29425.diff​ does just that.

[dd32]

In 29685:

Language Pack Upgrader: Remove ALL pre-existing filters before performing a translation update these filters may act in an unexpected way during the upgrade process.
See #29230. Fixes #29425.

[DrewAPicture]

typo