[wp-trac] [WordPress Trac] #37531: Plugin installation failure not reflected in the UI

[WordPress Trac]

#37531: Plugin installation failure not reflected in the UI
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 Reporter:  AronMS                         |       Owner:  ocean90
     Type:  defect (bug)                   |      Status:  closed
 Priority:  high                           |   Milestone:  4.6
Component:  Plugins                        |     Version:  trunk
 Severity:  major                          |  Resolution:  fixed
 Keywords:  has-patch commit dev-reviewed  |     Focuses:  ui,
                                           |  administration
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Comment (by ocean90):

 In [changeset:"38200"]:
 {{{
 #!CommitTicketReference repository="" revision="38200"
 Upgrade/Install: Make some install/update failures more verbose.

 An upgrader class is used in conjunction with an upgrader skin class. A
 skin class handles the logging for an upgrade and informs a user about the
 progress and failures.
 The current Ajax install/update handlers are using the
 `Automatic_Upgrader_Skin` class because during an Ajax request no output
 is intended. The difference between Ajax updates and automatic updates is
 that you will see the full log (usually by email) while Ajax updates focus
 only on success or failure. For that `Automatic_Upgrader_Skin` has one
 disadvantage: It doesn't provide a way to retrieve failure messages which
 were passed through `WP_Upgrader_Skin::error()` by the upgrader.
 To solve this issue a new skin `WP_Ajax_Upgrader_Skin` has been
 introduced. The skin extends `Automatic_Upgrader_Skin` and overrides the
 `error()` and `feedback()` methods to intercept all errors, which can be a
 `WP_Error` object or a string.

 This updates all four Ajax handler for installing/updating themes/plugins
 to use the new skin. They now also check the skin for any intercepted
 errors and pass them on to the user.

 Merge of [38199] to the 4.6 branch.

 Props flixos90, obenland, ocean90.
 Props DrewAPicture, pento for review.
 See #37531.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/37531#comment:34>
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