152 lines
4.6 KiB
Nix
152 lines
4.6 KiB
Nix
args@{fetchurl, composableDerivation, stdenv, perl, libxml2, postgresql, geos, proj, flex, ...}:
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/*
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### NixOS - usage:
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==================
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services.posgresql.extraPlugins = [ pkgs.postgis.v_1_5_1 ];
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or if you want to install 1.5.x and 1.3.x at the same time (which works
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because the .sql and .so files have different names):
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services.postgis.extraPlugins = [ (pkgs.buildEnv {
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name = "postgis-plugins";
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ignoreCollisions = 1; # scripts will collide - but there are aliases with version suffixes
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paths = [ pkgs.postgis.v_1_3_5 pkgs.postgis.v_1_5_1 ];
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})];
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By now it is only supported installing one of the 1.3.x verions because
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their shared libraries don't differ in naming.
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### important Postgis implementation details:
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=============================================
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Postgis provides a shared library implementing many operations. They are
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exposed to the Postgres SQL interpreter by special SQL queries eg:
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CREATE FUNCTION [...]
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AS '[..]liblwgeom', 'lwhistogram2d_in' LANGUAGE 'C' IMMUTABLE STRICT; -- WITH (isstrict);
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where liblwgeom is the shared library.
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Postgis < 1.5 used absolute paths, in NixOS $libdir is always used.
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Thus if you want to use postgresql dumps which were created by non NixOS
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systems you have to adopt the library path.
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### TODO:
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=========
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the bin commands to have gtk gui:
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*/
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let
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pgDerivationBase = composableDerivation.composableDerivation {} ( fix :
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let version = fix.fixed.version; in {
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name = "postgis-${version}";
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src = fetchurl {
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url = "http://postgis.refractions.net/download/postgis-${fix.fixed.version}.tar.gz";
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inherit (fix.fixed) sha256;
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};
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# don't pass these vars to the builder
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removeAttrs = ["hash" "sql_comments" "sql_srcs"];
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preConfigure = ''
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configureFlags="--datadir=$out/share --datarootdir=$out/share --bindir=$out/bin"
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makeFlags="PERL=${perl}/bin/perl datadir=$out/share pkglibdir=$out/lib bindir=$out/bin"
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'';
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pg_db_postgis_enable = ./pg_db_postgis_enable.sh;
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scriptNames = [ "pg_db_postgis_enable" ]; # helper scripts
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# prepare fixed parameters for script and create pg_db_postgis_enable script.
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# The script just loads postgis features into a list of given databases
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postgisEnableScript = ''
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s=$out/bin/pg_db_postgis_enable
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sql_comments=$out/share/postgis-${version}/comments.sql
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mkdir -p $(dirname $sql_comments)
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cp $(find -iname ${fix.fixed.sql_comments}) $sql_comments
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for script in $scriptNames; do
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tg=$out/bin/$script
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substituteAll ''${!script} $tg
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chmod +x $tg
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done
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'';
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# create a script enabling postgis features
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# also create aliases for all commands adding version information
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postInstall = ''
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sql_srcs=$(for sql in ${builtins.toString fix.fixed.sql_srcs}; do echo -n "$(find $out -iname "$sql") "; done )
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eval "$postgisEnableScript"
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eval "$postgisFixLibScript"
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for prog in $out/bin/*; do
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ln -s $prog $prog-${version}
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done
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cp -r doc $out
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'';
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buildInputs = [libxml2 postgresql geos proj perl];
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sql_comments = "postgis_comments.sql";
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meta = {
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description = "Geographic Objects for PostgreSQL";
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homepage = "http://postgis.refractions.net";
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license = "GPLv2";
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maintainers = [stdenv.lib.maintainers.marcweber];
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platforms = stdenv.lib.platforms.linux;
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};
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});
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in rec {
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# these builders just add some custom informaton to the receipe above
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v_1_3_5 = pgDerivationBase.merge ( fix: {
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version = "1.3.5";
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buildInputs = [ flex ];
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sha256 = "102d5ybn0db1wrb249dga2v8347vysd4f1brc8zb82d7vdd34wyq";
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sql_srcs = ["lwpostgis.sql" "spatial_ref_sys.sql"];
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pg_db_postgis_fix_or_load_sql_dump = ./pg_db_postgis_fix_or_load_sql_dump.sh;
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libName = "liblwgeom";
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scriptNames = [ "pg_db_postgis_enable" "pg_db_postgis_fix_or_load_sql_dump"]; # helper scripts
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# sql_srcs is defined in postInstall source above
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# if store path changes sql should not break. So replace absolute path to
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# shared library by path relatve to $libdir known by Postgres.
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postInstall = ''
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sed -i "s@AS '$out/lib/liblwgeom@AS '\$libdir/liblwgeom@" $sql_srcs $out/share/lwpostgis_upgrade.sql
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'';
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});
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v_1_3_6 = v_1_3_5.merge ({
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version = "1.3.6";
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sha256 = "0i6inyiwc5zgf5a4ssg0y774f8vn45zn5c38ccgnln9r6i54vc6k";
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});
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v_1_5_1 = pgDerivationBase.merge ( fix : {
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version = "1.5.1";
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sha256 = "0nymvqqi6pp4nh4dcshzqm76x4sraf119jp7l27c2q1lygm6p6jr";
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sql_srcs = ["postgis.sql" "spatial_ref_sys.sql"];
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});
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}
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