4 files changed, 21 insertions, 12 deletions

diff --git a/dhall/server/service/plugin/Config.dhall b/dhall/server/service/plugin/Config.dhall
index ea53361..1f60080 100644
--- a/dhall/server/service/plugin/Config.dhall
+++ b/dhall/server/service/plugin/Config.dhall
@@ -1,9 +1,8 @@
 < CorrelationId :
-        { header_name : Text, echo_downstream : Bool, generator : Text }
-| RequestTransformer :
-        { add : { headers : List Text } }
+    { header_name : Text, echo_downstream : Bool, generator : Text }
+| RequestTransformer : { add : { headers : List Text } }
 | RequestTermination :
-        { status_code : Natural, content_type : Text, body : Text }
-| IPRestriction :
-        { whitelist : Text }
+    { status_code : Natural, content_type : Text, body : Text }
+| IPRestriction : { whitelist : Text }
+| PreFunction : { functions : List Text }
 >
diff --git a/dhall/server/service/plugin/functions.dhall b/dhall/server/service/plugin/functions.dhall
new file mode 100644
index 0000000..a7b1295
--- /dev/null
+++ b/dhall/server/service/plugin/functions.dhall
@@ -0,0 +1,6 @@
+{ mkRequestTermination = ./mkRequestTermination.dhall
+, mkRequestTransformer = ./mkRequestTransformer.dhall
+, mkIPRestriction = ./mkIPRestriction.dhall
+, correlationId = ./correlationId.dhall
+, mkPreFunction = ./mkPreFunction.dhall
+}
diff --git a/dhall/server/service/plugin/mkPreFunction.dhall b/dhall/server/service/plugin/mkPreFunction.dhall
new file mode 100644
index 0000000..ff4f734
--- /dev/null
+++ b/dhall/server/service/plugin/mkPreFunction.dhall
@@ -0,0 +1,9 @@
+let Plugin = ./Plugin.dhall
+
+let config = ./Config.dhall
+
+in    λ(functions : List Text)
+    →   { name = "pre-function"
+        , config = config.PreFunction { functions = functions }
+        }
+      : Plugin
diff --git a/dhall/server/service/plugin/package.dhall b/dhall/server/service/plugin/package.dhall
index 872c53b..c231bc6 100644
--- a/dhall/server/service/plugin/package.dhall
+++ b/dhall/server/service/plugin/package.dhall
@@ -1,6 +1 @@
-{ Type = ./Plugin.dhall
-, mkRequestTermination = ./mkRequestTermination.dhall
-, mkRequestTransformer = ./mkRequestTransformer.dhall
-, mkIPRestriction = ./mkIPRestriction.dhall
-, correlationId = ./correlationId.dhall
-}
+{ Type = ./Plugin.dhall, functions = ./functions.dhall }