Use PG_MODULE_MAGIC_EXT in PostgreSQL 18 and later

[jeltz]

The PG_MODULE_MAGIC_EXT macro was added in PostgreSQL 18 and makes it possible to see which version of the library is actually loaded using pg_get_loaded_modules().

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 867434c2-ead3-45fe-bffa-873e6caa4d07

📥 Commits

Reviewing files that changed from the base of the PR and between f0a3d64 and baae98b.

📒 Files selected for processing (2)

• src/spock.c
• src/spock_output.c

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📝 Walkthrough

Walkthrough

Two PostgreSQL modules (spock.c and spock_output.c) are updated to use the new PG_MODULE_MAGIC_EXT macro for PostgreSQL 18+, explicitly declaring module name and version. Older versions fall back to PG_MODULE_MAGIC. The output plugin also includes the core header and retains its existing initialization logic.

Changes

PostgreSQL 18+ Module Magic Migration

Layer / File(s)	Summary
Core Module Magic Update src/spock.c	Module-magic initialization uses PG_MODULE_MAGIC_EXT with module name "spock" and SPOCK_VERSION for PostgreSQL 18+, falling back to PG_MODULE_MAGIC for older versions.
Output Plugin Module Magic Update src/spock_output.c	Includes spock.h and conditionally uses PG_MODULE_MAGIC_EXT with module name "spock_output" and SPOCK_VERSION for PostgreSQL 18+, with legacy fallback for older versions.
Plugin Initialization (Unchanged) src/spock_output.c	The _PG_output_plugin_init function continues to load spock's output plugin init and forward the callback unchanged.

Poem

🐰 A rabbit hops through version trees,
Module magic now with metadata—
PostgreSQL eighteen sees the breeze,
Names and versions clear for all to plea,
While older versions rest with ease.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: updating code to use PG_MODULE_MAGIC_EXT for PostgreSQL 18 and later.
Description check	✅ Passed	The description is related to the changeset, explaining the purpose of PG_MODULE_MAGIC_EXT and why it was added.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[codacy-production]

Up to standards ✅

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