fix?(package): postgreact: ~stir the stupid shit till it works [3]

package/c/postgreact/.gitignore

@@ -0,0 +1,3 @@
+package/c/postgreact/postgreact.control
+package/c/postgreact/postgreact.o
+package/c/postgreact/postgreact.so

package/c/postgreact/Makefile

@@ -1,16 +1,18 @@
 EXTENSION ?= postgreact
 EXTENSION_VERSION ?= 1.0
-
-# INFO(nrv): just in case idk how pgxs Makefile and shit all work
-EXTVERSION = $(EXTENSION_VERSION)
+EXTENSION_COMMENT ?= My first extension
 
 MODULE_big = $(EXTENSION)
-DATA = $(EXTENSION)--$(EXTENSION_VERSION).sql
+DATA = $(EXTENSION)--$(EXTENSION_VERSION).sql $(EXTENSION).control
 OBJS = $(EXTENSION).o 
 PG_CONFIG = pg_config
-
-$(BUILD_DIR)/$(EXTENSION).control:
-	sed "s/@EXTENSION_VERSION@/$(EXTVERSION)/g" $(EXTENSION).control.in > $@
-
 PGXS := $(shell $(PG_CONFIG) --pgxs)
+
+.PHONY: $(EXTENSION).control
+
+$(EXTENSION).control:
+	sed "s/@EXTENSION_VERSION@/$(EXTENSION_VERSION)/g; s/@EXTENSION_COMMENT@/$(EXTENSION_COMMENT)/g; s/@EXTENSION@/$(EXTENSION)/g" $(EXTENSION).control.in > $@
+
 include $(PGXS)
+
+# vim:wrap

package/c/postgreact/default.nix

@@ -1,11 +1,42 @@
 {
   lib,
-}: {
+  stdenv,
+  postgresql,
+  ...
+}:
+stdenv.mkDerivation rec {
   pname = "postgreact";
   version = "1.0";
 
   src = ./.;
 
+  USE_PGXS = 1;
+  EXTENSION = pname;
+  EXTENSION_VERSION = version;
+  EXTENSION_COMMENT = meta.description;
+
   buildInputs = [
+    postgresql
   ];
+
+  buildPhase = ''make all'';
+
+  installPhase = ''
+    mkdir -p $out/lib/postgresql $out/share/postgresql/extension
+
+    # Install compiled library
+    install -m 755 -D postgreact.so $out/lib/postgresql/postgreact.so
+
+    # Install control and SQL files
+    install -m 644 -D postgreact.control $out/share/postgresql/extension/postgreact.control
+    install -m 644 -D postgreact--${EXTENSION_VERSION}.sql $out/share/postgresql/extension/postgreact--${EXTENSION_VERSION}.sql
+  '';
+
+  meta = with lib; {
+    description = "PostgreSQL extension for simple templating.";
+    homepage = "https://github.com/yukkop/util.nix";
+    license = licenses.asl20;
+    platforms = postgresql.meta.platforms;
+    maintainers = with maintainers; [];
+  };
 }

package/c/postgreact/postgreact.c

@@ -1,14 +1,10 @@
 #include "postgres.h"
 #include "fmgr.h"
 #include "utils/builtins.h" /* for text_to_cstring and cstring_to_text */
+#include "postgreact.h"
 
-#ifdef PG_MODULE_MAGIC
-PG_MODULE_MAGIC;
-#endif
-
-Datum hello(PG_FUNCTION_ARGS) 
-{
-    PG_RETURN_TEXT_P(cstring_to_text("Eblan!"));
+Datum hello(PG_FUNCTION_ARGS) {
+  PG_RETURN_TEXT_P(cstring_to_text("Eblan!"));
 }
 
 void _PG_init(void) {

package/c/postgreact/postgreact.control.in

@@ -1,4 +1,4 @@
-comment = 'My first extension'
+comment = '@EXTENSION_COMMENT@'
 default_version = '@EXTENSION_VERSION@'
-module_pathname = '$libdir/postgreact'
+module_pathname = '$libdir/@EXTENSION@'
 relocatable = false

package/c/postgreact/postgreact.h

@@ -1,3 +1,6 @@
+#ifndef POSTGREACT_H
+#define POSTGREACT_H
+
 #include "postgres.h"
 
 #ifdef PG_MODULE_MAGIC
@@ -9,3 +12,5 @@ void _PG_fini(void);
 
 Datum hello(PG_FUNCTION_ARGS);
 PG_FUNCTION_INFO_V1(hello);
+
+#endif // POSTGREACT_H