Add power to follow logs on app and traefik

lib/mrsk/commands/app.rb

@@ -57,6 +57,14 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       *command
   end
 
+  def follow_logs(host:, grep: nil)
+    run_over_ssh pipe(
+      current_container_id,
+      "xargs docker logs -t -n 10 -f 2>&1",
+      ("grep '#{grep}'" if grep)
+    ).join(" "), host: host
+  end
+
   def console(host:)
     exec_over_ssh "bin/rails", "c", host: host
   end
@@ -79,7 +87,7 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
 
   private
     def exec_over_ssh(*command, host:)
-      "ssh -t #{config.ssh_user}@#{host} '#{run_exec(*command, interactive: true).join(" ")}'"
+      run_over_ssh run_exec(*command, interactive: true).join(" "), host: host
     end
 
     def service_filter

lib/mrsk/commands/base.rb

@@ -23,5 +23,9 @@ module Mrsk::Commands
       def docker(*args)
         args.compact.unshift :docker
       end
+
+      def run_over_ssh(command, host:)
+        "ssh -t #{config.ssh_user}@#{host} '#{command}'"
+      end
   end
 end

lib/mrsk/commands/traefik.rb

@@ -24,12 +24,17 @@ class Mrsk::Commands::Traefik < Mrsk::Commands::Base
     docker :ps, "--filter", "name=traefik"
   end
 
-  def logs(since: nil, lines: nil)
-    docker :logs, "traefik",
-      (" --since #{since}" if since),
-      (" -n #{lines}" if lines),
-      "-t",
-      "2>&1"
+  def logs(since: nil, lines: nil, grep: nil)
+    pipe \
+      docker(:logs, "traefik", (" --since #{since}" if since), (" -n #{lines}" if lines), "-t", "2>&1"),
+      ("grep '#{grep}'" if grep)
+  end
+
+  def follow_logs(host:, grep: nil)
+    run_over_ssh pipe(
+      docker(:logs, "traefik", "-t", "-n", "10", "-f", "2>&1"),
+      ("grep '#{grep}'" if grep)
+    ).join(" "), host: host
   end
 
   def remove_container