Inline dotenv kamal secrets calls

test/secrets/dotenv_inline_command_substitution_test.rb

@@ -0,0 +1,15 @@
+require "test_helper"
+
+class SecretsInlineCommandSubstitution < SecretAdapterTestCase
+  test "inlines kamal secrets commands" do
+    Kamal::Cli::Main.expects(:start).with { |command| puts "results"; command == [ "secrets", "fetch", "..." ] }
+    substituted = Kamal::Secrets::Dotenv::InlineCommandSubstitution.call("FOO=$(kamal secrets fetch ...)", nil, overwrite: false)
+    assert_equal "FOO=results", substituted
+  end
+
+  test "executes other commands" do
+    Kamal::Secrets::Dotenv::InlineCommandSubstitution.stubs(:`).with("blah").returns("results")
+    substituted = Kamal::Secrets::Dotenv::InlineCommandSubstitution.call("FOO=$(blah)", nil, overwrite: false)
+    assert_equal "FOO=results", substituted
+  end
+end