From b805579a0bba8bb72ee26218651e2b60ff73cfaf Mon Sep 17 00:00:00 2001
From: Alexis Gaget <alexis.gaget@cea.fr>
Date: Wed, 20 Dec 2023 17:07:11 +0100
Subject: [PATCH] add ESS ADS driver support (Beckhoff TwinCAT)

---
 lib/maintainers/maintainer-list.nix |  4 +++
 pkgs/default.nix                    |  1 +
 pkgs/epnix/support/ads/default.nix  | 45 +++++++++++++++++++++++++++++
 pkgs/epnix/support/ads/fixDep.patch | 12 ++++++++
 4 files changed, 62 insertions(+)
 create mode 100644 pkgs/epnix/support/ads/default.nix
 create mode 100644 pkgs/epnix/support/ads/fixDep.patch

diff --git a/lib/maintainers/maintainer-list.nix b/lib/maintainers/maintainer-list.nix
index 0061c4fb..a324399d 100644
--- a/lib/maintainers/maintainer-list.nix
+++ b/lib/maintainers/maintainer-list.nix
@@ -62,4 +62,8 @@ See `<nixpkgs/maintainers/scripts/check-maintainer-github-handles.sh>` for an ex
     email = "stephane.tzvetkov@cea.fr";
     name = "Stéphane Tzvetkov";
   };
+  agaget = {
+    email = "alexis.gaget@cea.fr";
+    name = "Alexis Gaget";
+  };
 }
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 0d1e908c..671cee26 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -25,6 +25,7 @@ in
       # EPICS support modules
 
       support = recurseExtensible (_self: {
+        ads = callPackage ./epnix/support/ads {};
         asyn = callPackage ./epnix/support/asyn {};
         autosave = callPackage ./epnix/support/autosave {};
         calc = callPackage ./epnix/support/calc {};
diff --git a/pkgs/epnix/support/ads/default.nix b/pkgs/epnix/support/ads/default.nix
new file mode 100644
index 00000000..0e939d59
--- /dev/null
+++ b/pkgs/epnix/support/ads/default.nix
@@ -0,0 +1,45 @@
+{
+  lib,
+  epnixLib,
+  epnix,
+  mkEpicsPackage,
+  fetchFromGitLab,
+  local_config_site ? {},
+  local_release ? {},
+}:
+mkEpicsPackage rec {
+  pname = "ads";
+  version = "2023.08.20";
+  varname = "ADS";
+
+  inherit local_config_site local_release;
+
+  src = fetchFromGitLab {
+    domain = "gitlab.esss.lu.se";
+    owner = "epics-modules";
+    repo = "epics-twincat-ads";
+    rev = "f07f73cd20320e40e908ed281527a81a4799bbce";
+    fetchSubmodules = true;
+    sha256 = "sha256-NCuT2EpEBEVMzQw4cU8l0AUYVXa9fUtEOGpynG5Z85M=";
+  };
+
+  # Patch used to fix parallelization compilation issue caused by EPNix compare to standard compilation.
+  # Wait for PR https://gitlab.esss.lu.se/epics-modules/epics-twincat-ads/-/merge_requests/3
+  patches = [./fixDep.patch];
+
+  propagatedBuildInputs = with epnix.support; [asyn calc];
+
+  preBuild = ''
+    touch configure/RELEASE_PATHS.local
+    touch configure/RELEASE_LIBS.local
+  '';
+
+  meta = {
+    description = "Module providing EPICS support for ADS Protocol (Automation Device Specification)";
+    homepage = "https://www.beckhoff.com/en-en/products/automation/twincat/tc1xxx-twincat-3-base/tc1000.html";
+    # Wait for ESS team answer about the license :  https://gitlab.esss.lu.se/epics-modules/epics-twincat-ads/-/issues/1
+    # lib.licenses.free don't work in EPNIX for now
+    license = epnixLib.licenses.epics;
+    maintainers = with epnixLib.maintainers; [agaget];
+  };
+}
diff --git a/pkgs/epnix/support/ads/fixDep.patch b/pkgs/epnix/support/ads/fixDep.patch
new file mode 100644
index 00000000..10dfb791
--- /dev/null
+++ b/pkgs/epnix/support/ads/fixDep.patch
@@ -0,0 +1,12 @@
+diff --git a/Makefile.epics b/Makefile.epics
+index ef5c909..a709c05 100644
+--- a/Makefile.epics
++++ b/Makefile.epics
+@@ -10,6 +10,7 @@ endef
+ $(foreach dir, $(filter-out configure,$(DIRS)),$(eval $(call DIR_template,$(dir))))
+ 
+ iocBoot_DEPEND_DIRS += $(filter %App,$(DIRS))
++adsExApp_DEPEND_DIRS += adsApp
+ 
+ include $(TOP)/configure/RULES_TOP
+