support/twincat-ads: add ESS ADS driver support (Beckhoff TwinCAT)

pkgs/default.nix

@@ -48,6 +48,7 @@ in
         snmp = callPackage ./epnix/support/snmp {};
         sscan = callPackage ./epnix/support/sscan {};
         StreamDevice = callPackage ./epnix/support/StreamDevice {};
+        twincat-ads = callPackage ./epnix/support/twincat-ads {};
       });
 
       # EPICS related tools and extensions

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://gitlab.esss.lu.se/epics-modules/epics-twincat-ads";
+    # 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];
+  };
+}