postgresql: cleanup postgis (#54396)

postgis: cleanup

Another part of https://github.com/NixOS/nixpkgs/pull/38698, though I did cleanup even more.
Moving docs to separate output should save another 30MB.

I did pin poppler to 0.61 just to be sure GDAL doesn't break again next
time poppler changes internal APIs.

nixos/tests/postgis.nix

@@ -12,7 +12,9 @@ import ./make-test.nix ({ pkgs, ...} : {
         services.postgresql = let mypg = pkgs.postgresql_11; in {
             enable = true;
             package = mypg;
-            extraPlugins = [ (pkgs.postgis.override { postgresql = mypg; }) ];
+            extraPlugins = with mypg.pkgs; [
+              postgis
+            ];
         };
       };
   };
@@ -22,5 +24,6 @@ import ./make-test.nix ({ pkgs, ...} : {
     $master->waitForUnit("postgresql");
     $master->sleep(10); # Hopefully this is long enough!!
     $master->succeed("sudo -u postgres psql -c 'CREATE EXTENSION postgis;'");
+    $master->succeed("sudo -u postgres psql -c 'CREATE EXTENSION postgis_topology;'");
   '';
 })

pkgs/servers/sql/postgresql/ext/postgis.nix

@@ -10,79 +10,27 @@
 , pkgconfig
 , file
 }:
-
-  /*
-
-  ### NixOS - usage:
-  ==================
-
-    services.postgresql.extraPlugins = [ (pkgs.postgis.override { postgresql = pkgs.postgresql_9_5; }) ];
-
-
-  ### important Postgis implementation details:
-  =============================================
-
-    Postgis provides a shared library implementing many operations. They are
-    exposed to the Postgres SQL interpreter by special SQL queries eg:
-
-      CREATE FUNCTION [...]
-              AS '[..]liblwgeom', 'lwhistogram2d_in' LANGUAGE 'C' IMMUTABLE STRICT; -- WITH (isstrict);
-
-   where liblwgeom is the shared library.
-   Postgis < 1.5 used absolute paths, in NixOS $libdir is always used.
-
-   Thus if you want to use postgresql dumps which were created by non NixOS
-   systems you have to adopt the library path.
-
-
-   ### TODO:
-   =========
-   the bin commands to have gtk gui:
-  */
-
-
-let
-  version = "2.5.1";
-  sha256 = "14bsh4kflp4bxilypkpmhrpldknc9s9vgiax8yfhxbisyib704zv";
-in stdenv.mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "postgis-${version}";
+  version = "2.5.1";
+
+  outputs = [ "out" "doc" ];
 
   src = fetchurl {
-    url = "https://download.osgeo.org/postgis/source/postgis-${builtins.toString version}.tar.gz";
-    inherit sha256;
+    url = "https://download.osgeo.org/postgis/source/postgis-${version}.tar.gz";
+    sha256 = "14bsh4kflp4bxilypkpmhrpldknc9s9vgiax8yfhxbisyib704zv";
   };
 
-  # don't pass these vars to the builder
-  removeAttrs = ["sql_comments" "sql_srcs"];
-
-  preInstall = ''
-    mkdir -p $out/bin
-  '';
-
-  # create aliases for all commands adding version information
-  postInstall = ''
-    sql_srcs=$(for sql in ${builtins.toString sql_srcs}; do echo -n "$(find $out -iname "$sql") "; done )
-
-    for prog in $out/bin/*; do # */
-      ln -s $prog $prog-${version}
-    done
-
-    cp -r doc $out
-  '';
-
   buildInputs = [ libxml2 postgresql geos proj perl gdal json_c pkgconfig ];
-
-  sql_comments = "postgis_comments.sql";
-
-  sql_srcs = ["postgis.sql" "spatial_ref_sys.sql"];
+  dontDisableStatic = true;
 
   # postgis config directory assumes /include /lib from the same root for json-c library
   NIX_LDFLAGS = "-L${stdenv.lib.getLib json_c}/lib";
 
-  dontDisableStatic = true;
   preConfigure = ''
     sed -i 's@/usr/bin/file@${file}/bin/file@' configure
     configureFlags="--datadir=$out/share --datarootdir=$out/share --bindir=$out/bin --with-gdalconfig=${gdal}/bin/gdal-config --with-jsondir=${json_c.dev}"
+
     makeFlags="PERL=${perl}/bin/perl datadir=$out/share pkglibdir=$out/lib bindir=$out/bin"
   '';
   postConfigure = ''
@@ -95,6 +43,20 @@ in stdenv.mkDerivation rec {
         "raster/scripts/python/Makefile";
   '';
 
+  preInstall = ''
+    mkdir -p $out/bin
+  '';
+
+  # create aliases for all commands adding version information
+  postInstall = ''
+    for prog in $out/bin/*; do # */
+      ln -s $prog $prog-${version}
+    done
+
+    mkdir -p $doc/share/doc/postgis
+    mv doc/* $doc/share/doc/postgis/
+  '';
+
   meta = with stdenv.lib; {
     description = "Geographic Objects for PostgreSQL";
     homepage = http://postgis.refractions.net;

pkgs/servers/sql/postgresql/packages.nix

@@ -1,5 +1,12 @@
 self: super: {
 
+    postgis = super.callPackage ./ext/postgis.nix {
+        gdal = self.gdal.override {
+            postgresql = self.postgresql;
+            poppler = self.poppler_0_61;
+        };
+    };
+
     pg_repack = super.callPackage ./ext/pg_repack.nix { };
 
     pg_similarity = super.callPackage ./ext/pg_similarity.nix { };

pkgs/top-level/aliases.nix

@@ -253,6 +253,7 @@ mapAliases ({
   pg_hll = postgresqlPackages.pg_hll;
   pg_cron = postgresqlPackages.pg_cron;
   pg_topn = postgresqlPackages.pg_topn;
+  postgis = postgresqlPackages.postgis;
   # end
   procps-ng = procps; # added 2018-06-08
   prometheus-statsd-bridge = prometheus-statsd-exporter;  # added 2017-08-27

pkgs/top-level/all-packages.nix

@@ -12088,8 +12088,6 @@ in
     buildPythonApplication click future six;
   };
 
-  postgis = callPackage ../development/libraries/postgis { };
-
   protobuf = protobuf3_6;
 
   protobuf3_6 = callPackage ../development/libraries/protobuf/3.6.nix { };