mlflow-server: init at 1.4.0

pkgs/development/python-modules/mlflow/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ stdenv, buildPythonPackage, fetchPypi, isPy27
 , alembic
 , click
 , cloudpickle
@@ -26,6 +26,7 @@
 buildPythonPackage rec {
   pname = "mlflow";
   version = "1.4.0";
+  disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;

pkgs/servers/mlflow-server/default.nix

@@ -0,0 +1,37 @@
+{lib, python3, writeText}:
+
+let
+  py = python3.pkgs;
+in
+py.toPythonApplication 
+  (py.mlflow.overridePythonAttrs(old: rec {
+    pname = "mlflow-server";
+
+    propagatedBuildInputs = old.propagatedBuildInputs ++ [
+      py.boto3
+      py.mysqlclient
+    ];
+
+    postPatch = ''
+      substituteInPlace mlflow/utils/process.py --replace \
+        "child = subprocess.Popen(cmd, env=cmd_env, cwd=cwd, universal_newlines=True," \
+        "cmd[0]='$out/bin/gunicornMlflow'; child = subprocess.Popen(cmd, env=cmd_env, cwd=cwd, universal_newlines=True,"
+    '';
+
+    gunicornScript = writeText "gunicornMlflow"
+    ''
+        #!/usr/bin/env python
+        import re
+        import sys
+        from gunicorn.app.wsgiapp import run
+        if __name__ == '__main__':
+          sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', ''', sys.argv[0])
+          sys.exit(run())
+      '';
+
+    postInstall = ''
+      gpath=$out/bin/gunicornMlflow
+      cp ${gunicornScript} $gpath
+      chmod 555 $gpath
+    '';
+}))

pkgs/top-level/all-packages.nix

@@ -15385,6 +15385,8 @@ in
 
   miniHttpd = callPackage ../servers/http/mini-httpd {};
 
+  mlflow-server = callPackage ../servers/mlflow-server { };
+  
   mlmmj = callPackage ../servers/mail/mlmmj { };
 
   moodle = callPackage ../servers/web-apps/moodle { };