add 'no pending migration'

lib/plausible_release.ex

@@ -118,12 +118,16 @@ defmodule Plausible.Release do
 
   def pending_streaks(repos \\ repos()) do
     prepare()
-    IO.puts("Collecting pending migrations..\n")
+    IO.puts("Collecting pending migrations..")
 
     pending = all_pending_migrations(repos)
-    streaks = migration_streaks(pending)
 
-    print_migration_streaks(streaks, pending)
+    if pending == [] do
+      IO.puts("No pending migrations!")
+    else
+      streaks = migration_streaks(pending)
+      print_migration_streaks(streaks, pending)
+    end
   end
 
   defp print_migration_streaks([{repo, up_to_version} | streaks], pending) do
@@ -133,12 +137,10 @@ defmodule Plausible.Release do
       end)
 
     IO.puts(
-      "#{inspect(repo)} [#{Path.relative_to_cwd(Ecto.Migrator.migrations_path(repo))}] streak up to version #{up_to_version}:"
+      "\n#{inspect(repo)} [#{Path.relative_to_cwd(Ecto.Migrator.migrations_path(repo))}] streak up to version #{up_to_version}:"
     )
 
     Enum.each(streak, fn {_repo, version, name} -> IO.puts("  * #{version}_#{name}") end)
-    IO.puts("")
-
     print_migration_streaks(streaks, pending)
   end
 

test/plausible/release_test.exs

@@ -89,6 +89,17 @@ defmodule Plausible.ReleaseTest do
       :ok
     end
 
+    defp last_migration(repo) do
+      {:ok, {_status, version, name}, _started} =
+        Ecto.Migrator.with_repo(repo, fn repo ->
+          repo
+          |> Ecto.Migrator.migrations()
+          |> List.last()
+        end)
+
+      "#{version}_#{name}"
+    end
+
     defp fake_migrate(repo, up_to_migration) do
       {up_to_version, _name} = Integer.parse(up_to_migration)
 
@@ -220,6 +231,19 @@ defmodule Plausible.ReleaseTest do
 
              Plausible.ReleaseTest.PostgreSQL [_build/test/lib/plausible/priv/repo/migrations] streak up to version \
              """ <> _future = pending_streaks
+
+      fake_migrate(PostgreSQL, last_migration(PostgreSQL))
+      fake_migrate(ClickHouse, last_migration(ClickHouse))
+
+      no_streaks = capture_io(fn -> Release.pending_streaks([PostgreSQL, ClickHouse]) end)
+
+      assert no_streaks == """
+             Loading plausible..
+             Starting dependencies..
+             Starting repos..
+             Collecting pending migrations..
+             No pending migrations!
+             """
     end
   end
 end