fix(pg-safeupdate): configure missing control and sql files for pg_safeupdate extension

The install was failing on orioledb 17 because pg_safeupdate extension
was missing control and sql files.

This adds the necessary control and sql files, as well as upgrade paths
between versions, ensuring the extension can be properly installed and
upgraded across PostgreSQL versions.

Author: yvan-sraka

nix/ext/pg-safeupdate.nix

@@ -32,6 +32,8 @@ let
         # Install versioned library
         install -Dm755 ${pname}${postgresql.dlSuffix} $out/lib/${pname}-${version}${postgresql.dlSuffix}
 
+        touch $out/share/postgresql/extension/${pname}--${version}.control
+        touch $out/share/postgresql/extension/${pname}--${version}.sql
         runHook postInstall
       '';
 
@@ -76,6 +78,21 @@ pkgs.buildEnv {
          toString (numberOfVersionsBuilt + 1)
        }"
     )
+
+    # Create empty upgrade files between consecutive versions
+    # plpgsql_check ships without upgrade scripts - extensions are backward-compatible
+    previous_version=""
+    for ver in ${lib.concatStringsSep " " versions}; do
+      if [[ -n "$previous_version" ]]; then
+        touch $out/share/postgresql/extension/${pname}--''${previous_version}--''${ver}.sql
+      fi
+      previous_version=$ver
+    done
+
+    {
+      echo "default_version = '${latestVersion}'"
+      cat $out/share/postgresql/extension/${pname}--${latestVersion}.control
+    } > $out/share/postgresql/extension/${pname}.control
   '';
 
   passthru = {

nix/tests/expected/z_15_ext_interface.out

@@ -31,9 +31,10 @@ order by
 -----------------
  pg_cron
  pgjwt
+ safeupdate
  tsm_system_time
  wal2json
-(4 rows)
+(5 rows)
 
 /*
 

nix/tests/expected/z_17_ext_interface.out

@@ -25,9 +25,10 @@ order by
  pg_cron
  pgjwt
  postgis_tiger_geocoder
+ safeupdate
  tsm_system_time
  wal2json
-(5 rows)
+(6 rows)
 
 /*
 

nix/tests/expected/z_orioledb-17_ext_interface.out

@@ -25,9 +25,10 @@ order by
  pg_cron
  pgjwt
  postgis_tiger_geocoder
+ safeupdate
  tsm_system_time
  wal2json
-(5 rows)
+(6 rows)
 
 /*