Merge pull request #4160 from nerg4l/go-logs-plugin

Rewrite logs plugin in Go

docs/appendices/0.22.0-migration-guide.md

@@ -1,5 +1,9 @@
 # 0.22.0 Migration Guide
 
+## Deprecations
+
+- Calling `logs:failed` without either a `<name>` or the `--all` flag is deprecated.
+
 ## Changes
 
 - Underscores are no longer valid characters in app names. Please rename applications before upgrading.

docs/deployment/logs.md

@@ -2,7 +2,7 @@
 
 ```
 logs <app> [-h] [-t] [-n num] [-q] [-p process]  # Display recent log output
-logs:failed [<app>]                              # Shows the last failed deploy logs
+logs:failed  [--parallel count] [--all|<app>]    # Shows the last failed deploy logs
 ```
 
 ## Usage
@@ -46,8 +46,8 @@ You can retrieve these logs by using the `logs:failed` command
 dokku logs:failed node-js-app
 ```
 
-You can also retrieve the failed logs for each app:
+You may also fetch all failed app logs by using the `--all` flag.
 
 ```shell
-dokku logs:failed node-js-app
+dokku logs:failed --all
 ```