Check specifically for file url in document_location, fixing crash in Xcode 15 when running in Apple Silicon

[bpollman]

Problem

The plugin is breaking with Xcode 15 on certain projects due to a missing url property.

Error

/Users/distiller/project/.bundle/ruby/3.1.0/gems/danger-xcode_summary-1.2.0/lib/xcode_summary/plugin.rb:202:in `parse_location': \e[31m (Danger::DSLError)
[00:05:08]: ▸ [!] Invalid `BuildDangerfile` file: undefined method `gsub' for nil:NilClass
[00:05:08]: ▸ file_path = document_location.url.gsub('file://', '').split('#').first
[00:05:08]: ▸ ^^^^^\e[0m

Description

I've taken inspiration from the recent fastlane fix addressing the same issue for the trainer.

It would appear that with Xcode 15 there are at least some cases where test failure data would not include a url property. Adjusting the check in failure_message to specifically verify the presence of self.document_location_in_creating_workspace&.url prior to attempting to append it to the failure message seems liek the most straightforward resolution.

[gmogames360]

@diogot Do you know when this will get merged/fixed? We are having the same issue in our implementation

[stephengilroy-grx]

Tested this out locally and it works for me 👍 . Any thoughts @diogot ? I wonder if this has been abandoned?

[nekrich]

@marcelofabri, do you have enough permissions to merge it into the master branch 🙏 ?

[giginet]

@diogot Could you check this PR and release it?