Pyrseas: init at 0.8.0 (#34225)

* Pyrseas: init at 0.8.0

Pyrseas is a declarative tool for managing PostgreSQL schemas.

* Replacing python27Packages with python2Packages

* Explaining why the tests are disabled

* Pyrseas: updating after review

pkgs/development/tools/database/pyrseas/default.nix

···
+{ stdenv, pythonPackages, fetchFromGitHub }:
+
+let
+  pgdbconn = pythonPackages.buildPythonPackage rec {
+    pname = "pgdbconn";
+    version = "0.8.0";
+    src = fetchFromGitHub {
+      owner = "perseas";
+      repo = "pgdbconn";
+      rev = "26c1490e4f32e4b5b925e5b82014ad106ba5b057";
+      sha256 = "09r4idk5kmqi3yig7ip61r6js8blnmac5n4q32cdcbp1rcwzdn6z";
+    };
+    # The tests are impure (they try to access a PostgreSQL server)
+    doCheck = false;
+    propagatedBuildInputs = [
+      pythonPackages.psycopg2
+      pythonPackages.pytest
+    ];
+  };
+in
+
+pythonPackages.buildPythonApplication rec {
+  pname = "pyrseas";
+  version = "0.8.0";
+  src = fetchFromGitHub {
+    owner = "perseas";
+    repo = "Pyrseas";
+    rev = "2e9be763e61168cf20d28bd69010dc5875bd7b97";
+    sha256 = "1h9vahplqh0rzqjsdq64qqar6hj1bpbc6nl1pqwwgca56385br8r";
+  };
+  # The tests are impure (they try to access a PostgreSQL server)
+  doCheck = false;
+  propagatedBuildInputs = [
+    pythonPackages.psycopg2
+    pythonPackages.pytest
+    pythonPackages.pyyaml
+    pgdbconn
+  ];
+  meta = {
+    description = "A declarative language to describe PostgreSQL databases";
+    homepage = http://perseas.github.io/;
+    license = stdenv.lib.licenses.bsd3;
+    maintainers = with stdenv.lib.maintainers; [ pmeunier ];
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   pup = callPackage ../development/tools/pup { };
 
+  pyrseas = callPackage ../development/tools/database/pyrseas { };
+
   qtcreator = libsForQt5.callPackage ../development/qtcreator { };
 
   r10k = callPackage ../tools/system/r10k { };