buildbot: assorted cleanups

Some changes to be more idiomatic and use stdenv building blocks more.
I also added a `buildbot.withPlugins` instead of the current plugins
mechanism, which forces an unnecessary rebuild of the package and reruns
all the tests. This should be equivalent and more pleasant to use in
practice.

pkgs/development/tools/build-managers/buildbot/default.nix

@@ -1,76 +1,83 @@
-{ stdenv, lib, fetchurl, coreutils, openssh, buildbot-worker, makeWrapper,
-  pythonPackages, gnused, plugins ? [] }:
+{ stdenv, lib, openssh, buildbot-worker, pythonPackages, runCommand, makeWrapper }:
 
-pythonPackages.buildPythonApplication (rec {
-  name = "${pname}-${version}";
-  pname = "buildbot";
-  version = "0.9.4";
-  src = fetchurl {
-    url = "mirror://pypi/b/${pname}/${name}.tar.gz";
-    sha256 = "0wklrn4fszac9wi8zw3vbsznwyff6y57cz0i81zvh46skb6n3086";
-  };
+let
+  withPlugins = plugins: runCommand "wrapped-${package.name}" {
+    buildInputs = [ makeWrapper ];
+    passthru.withPlugins = moarPlugins: withPlugins (moarPlugins ++ plugins);
+  } ''
+    makeWrapper ${package}/bin/buildbot $out/bin/buildbot \
+      --prefix PYTHONPATH : ${lib.makeSearchPathOutput "lib" pythonPackages.python.sitePackages plugins}
+  '';
 
-  buildInputs = with pythonPackages; [
-    lz4
-    txrequests
-    pyjade
-    boto3
-    moto
-    txgithub
-    mock
-    setuptoolsTrial
-    isort
-    pylint
-    astroid
-    pyflakes
-    openssh
-    buildbot-worker
-    makeWrapper
-    treq
-  ];
+  package = pythonPackages.buildPythonApplication (rec {
+    name = "${pname}-${version}";
+    pname = "buildbot";
+    version = "0.9.4";
 
-  propagatedBuildInputs = with pythonPackages; [
+    src = pythonPackages.fetchPypi {
+      inherit pname version;
+      sha256 = "0wklrn4fszac9wi8zw3vbsznwyff6y57cz0i81zvh46skb6n3086";
+    };
 
-    # core
-    twisted
-    jinja2
-    zope_interface
-    sqlalchemy
-    sqlalchemy_migrate
-    future
-    dateutil
-    txaio
-    autobahn
-    pyjwt
+    buildInputs = with pythonPackages; [
+      lz4
+      txrequests
+      pyjade
+      boto3
+      moto
+      txgithub
+      mock
+      setuptoolsTrial
+      isort
+      pylint
+      astroid
+      pyflakes
+      openssh
+      buildbot-worker
+      treq
+    ];
 
-    # tls
-    pyopenssl
-    service-identity
-    idna
+    propagatedBuildInputs = with pythonPackages; [
 
-    # docs
-    sphinx
-    sphinxcontrib-blockdiag
-    sphinxcontrib-spelling
-    pyenchant
-    docutils
-    ramlfications
-    sphinx-jinja
+      # core
+      twisted
+      jinja2
+      zope_interface
+      sqlalchemy
+      sqlalchemy_migrate
+      future
+      dateutil
+      txaio
+      autobahn
+      pyjwt
 
-  ] ++ plugins;
+      # tls
+      pyopenssl
+      service-identity
+      idna
 
-  postPatch = ''
-    ${gnused}/bin/sed -i 's|/usr/bin/tail|${coreutils}/bin/tail|' buildbot/scripts/logwatcher.py
-  '';
+      # docs
+      sphinx
+      sphinxcontrib-blockdiag
+      sphinxcontrib-spelling
+      pyenchant
+      docutils
+      ramlfications
+      sphinx-jinja
 
-  postFixup = ''
-    makeWrapper $out/bin/.buildbot-wrapped $out/bin/buildbot --set PYTHONPATH "$PYTHONPATH"
-  '';
+    ];
+
+    postPatch = ''
+      substituteInPlace buildbot/scripts/logwatcher.py --replace '/usr/bin/tail' "$(type -P tail)"
+    '';
+
+    passthru = { inherit withPlugins; };
 
-  meta = with stdenv.lib; {
-    homepage = http://buildbot.net/;
-    description = "Continuous integration system that automates the build/test cycle";
-    maintainers = with maintainers; [ nand0p ryansydnor ];
-    license = licenses.gpl2;
-  };
-})
+    meta = with stdenv.lib; {
+      homepage = http://buildbot.net/;
+      description = "Continuous integration system that automates the build/test cycle";
+      maintainers = with maintainers; [ nand0p ryansydnor ];
+      license = licenses.gpl2;
+    };
+  });
+in package

pkgs/development/tools/build-managers/buildbot/worker.nix

@@ -1,12 +1,12 @@
-{ stdenv, fetchurl, gnused, coreutils, pythonPackages }:
+{ stdenv, pythonPackages }:
 
 pythonPackages.buildPythonApplication (rec {
   name = "${pname}-${version}";
   pname = "buildbot-worker";
   version = "0.9.4";
 
-  src = fetchurl {
-    url = "mirror://pypi/b/${pname}/${name}.tar.gz";
+  src = pythonPackages.fetchPypi {
+    inherit pname version;
     sha256 = "0rdrr8x7sn2nxl51p6h9ad42s3c28lb6sys84zrg0d7fm4zhv7hj";
   };
 
@@ -14,7 +14,7 @@ pythonPackages.buildPythonApplication (rec {
   propagatedBuildInputs = with pythonPackages; [ twisted future ];
 
   postPatch = ''
-    ${gnused}/bin/sed -i 's|/usr/bin/tail|${coreutils}/bin/tail|' buildbot_worker/scripts/logwatcher.py
+    substituteInPlace buildbot_worker/scripts/logwatcher.py --replace '/usr/bin/tail' "$(type -P tail)"
   '';
 
   meta = with stdenv.lib; {

pkgs/top-level/all-packages.nix

@@ -6220,12 +6220,8 @@ with pkgs;
   buildbot-plugins = callPackage ../development/tools/build-managers/buildbot/plugins.nix {
     pythonPackages = python2Packages;
   };
-  buildbot-ui = self.buildbot.override {
-    plugins = with self.buildbot-plugins; [ www ];
-  };
-  buildbot-full = self.buildbot.override {
-    plugins = with self.buildbot-plugins; [ www console-view waterfall-view ];
-  };
+  buildbot-ui = buildbot.withPlugins (with self.buildbot-plugins; [ www ]);
+  buildbot-full = buildbot.withPlugins (with self.buildbot-plugins; [ www console-view waterfall-view ]);
 
   buildkite-agent = callPackage ../development/tools/continuous-integration/buildkite-agent { };