Remove deprecated directives and prefix

Also start testing on PostgreSQL 18 and document `make install prefix=`
on PostgreSQL 18.

Author: theory

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     strategy:
       matrix:
-        pg: [17, 16, 15, 14, 13, 12, 11, 10, 9.6, 9.5, 9.4, 9.3, 9.2]
+        pg: [18, 17, 16, 15, 14, 13, 12, 11, 10, 9.6, 9.5, 9.4, 9.3, 9.2]
     name: 🐘 PostgreSQL ${{ matrix.pg }}
     runs-on: ubuntu-latest
     container: pgxn/pgxn-tools

Changes

@@ -1,5 +1,13 @@
 Revision history for PostgreSQL extension semver.
 
+0.40.1
+      - Removed the `directory` and `MODULEDIR` directives that installed
+        extension files in a subdirectory named "semver", as it's not
+        necessary, and deprecated by PostgreSQL 18.
+      - Removed the `$libdir/` prefix from the `module_pathname` directive,
+        so that the module can be installed and fond in any directory listed
+        in `dynamic_library_path`.
+
 0.40.0  2024-07-20T20:35:03Z
       - Updated the installation configuration to install the SQL and
         documentation files into `semver` subdirectories.

Makefile

@@ -5,7 +5,6 @@ EXTVERSION   = $(shell grep -m 1 '[[:space:]]\{8\}"version":' META.json | \
 DISTVERSION  = $(shell grep -m 1 '[[:space:]]\{3\}"version":' META.json | \
                sed -e 's/[[:space:]]*"version":[[:space:]]*"\([^"]*\)",\{0,1\}/\1/')
 
-MODULEDIR    = $(EXTENSION)
 DATA         = $(wildcard sql/*.sql)
 DOCS         = $(wildcard doc/*.mmd)
 TESTS        = $(wildcard test/sql/*.sql)

README.md

@@ -48,6 +48,21 @@ You need to run the test suite using a super user, such as the default
 
     make installcheck PGUSER=postgres
 
+To install the extension in a custom prefix on PostgreSQL 18 or later, pass
+the `prefix` argument to `install` (but no other `make` targets):
+
+```sh
+make install prefix=/usr/local/extras
+```
+
+Then ensure that the prefix is included in the following [`postgresql.conf`
+parameters]:
+
+```ini
+extension_control_path = '/usr/local/extras/postgresql/share/extension:$system'
+dynamic_library_path = '/usr/local/extras/postgresql/lib:$libdir'
+```
+
 Once semver is installed, you can add it to a database. If you're running
 PostgreSQL 9.1.0 or greater, it's a simple as connecting to a database as a
 super user and running:
@@ -100,3 +115,5 @@ not limited to, the implied warranties of merchantability and fitness for a
 particular purpose. The software provided hereunder is on an "as is" basis,
 and The pg-semver Maintainers no obligations to provide maintenance, support,
 updates, enhancements, or modifications.
+
+  [`postgresql.conf` parameters]: https://www.postgresql.org/docs/devel/runtime-config-client.html#RUNTIME-CONFIG-CLIENT-OTHER

semver.control

@@ -1,7 +1,5 @@
 # semver extension
 comment = 'Semantic version data type'
 default_version = '0.40.0'
-
-directory = 'semver'
-module_pathname = '$libdir/semver'
+module_pathname = 'semver'
 relocatable = true