Fix `tootctl accounts cull` (#10460)

* List the actual accounts that would have been culled during a dry run.

Otherwise, the dry run mode is basically useless.

* Prevent unreachable domains from inheriting the previous status code.

* Update CHANGELOG.md for #10460.

CHANGELOG.md

@@ -50,6 +50,7 @@ All notable changes to this project will be documented in this file.
 - Change Webpack to not use @babel/preset-env to compile node_modules ([ykzts](https://github.com/tootsuite/mastodon/pull/10289))
 - Change web UI to use new Web Share Target API ([gol-cha](https://github.com/tootsuite/mastodon/pull/9963))
 - Change ActivityPub reports to have persistent URIs ([ThibG](https://github.com/tootsuite/mastodon/pull/10303))
+- Change `tootctl accounts cull --dry-run` to list accounts that would be deleted ([BenLubar](https://github.com/tootsuite/mastodon/pull/10460))
 
 ### Removed
 
@@ -75,6 +76,7 @@ All notable changes to this project will be documented in this file.
 - Fix race condition when streaming out deleted statuses ([ThibG](https://github.com/tootsuite/mastodon/pull/10280))
 - Fix performance of admin federation UI by caching account counts ([Gargron](https://github.com/tootsuite/mastodon/pull/10374))
 - Fix JS error on pages that don't define a CSRF token ([hinaloe](https://github.com/tootsuite/mastodon/pull/10383))
+- Fix `tootctl accounts cull` sometimes removing accounts that are temporarily unreachable ([BenLubar](https://github.com/tootsuite/mastodon/pull/10460))
 
 ## [2.7.4] - 2019-03-05
 ### Fixed

lib/mastodon/accounts_cli.rb

@@ -219,12 +219,14 @@ module Mastodon
     def cull
       skip_threshold = 7.days.ago
       culled         = 0
+      dry_run_culled = []
       skip_domains   = Set.new
       dry_run        = options[:dry_run] ? ' (DRY RUN)' : ''
 
       Account.remote.where(protocol: :activitypub).partitioned.find_each do |account|
         next if account.updated_at >= skip_threshold || (account.last_webfingered_at.present? && account.last_webfingered_at >= skip_threshold)
 
+        code = 0
         unless skip_domains.include?(account.domain)
           begin
             code = Request.new(:head, account.uri).perform(&:code)
@@ -236,7 +238,11 @@ module Mastodon
         end
 
         if [404, 410].include?(code)
-          SuspendAccountService.new.call(account, destroy: true) unless options[:dry_run]
+          if options[:dry_run]
+            dry_run_culled << account.acct
+          else
+            SuspendAccountService.new.call(account, destroy: true)
+          end
           culled += 1
           say('+', :green, false)
         else
@@ -252,6 +258,11 @@ module Mastodon
         say('The following servers were not available during the check:', :yellow)
         skip_domains.each { |domain| say('    ' + domain) }
       end
+
+      unless dry_run_culled.empty?
+        say('The following accounts would have been deleted:', :green)
+        dry_run_culled.each { |account| say('    ' + account) }
+      end
     end
 
     option :all, type: :boolean