api: add hardcoded versioning support

Added the _VERSION variable to the exported table.
Is part of the task [1].

1. github.com/tarantool/roadmap-internal/issues/204

.github/workflows/packaging.yml

@@ -10,8 +10,20 @@ on:
       - '*'
 
 jobs:
+  # Run not only on tags, otherwise dependent job will skip.
+  version-check:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check module version
+        # We need this step to run only on push with tag.
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') }}
+        uses: tarantool/actions/check-module-version@master
+        with:
+          module-name: 'expirationd'
+
   package:
     runs-on: ubuntu-20.04
+    needs: version-check
 
     strategy:
       fail-fast: false

.github/workflows/publish.yml

@@ -6,6 +6,16 @@ on:
     tags: ['*']
 
 jobs:
+  version-check:
+    # We need this job to run only on push with tag.
+    if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') }}
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check module version
+        uses: tarantool/actions/check-module-version@master
+        with:
+          module-name: 'expirationd'
+
   publish-rockspec-scm-1:
     if: github.ref == 'refs/heads/master'
     runs-on: ubuntu-20.04
@@ -18,6 +28,7 @@ jobs:
 
   publish-rockspec-tag:
     if: startsWith(github.ref, 'refs/tags/')
+    needs: version-check
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3

.luacheckrc

@@ -1,7 +1,6 @@
 globals = {
     "box",
     "_TARANTOOL",
-    "_VERSION",
 }
 
 ignore = {

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Added
 
+- Add versioning support (#136).
+
 ### Changed
 
 ### Fixed

expirationd-scm-1.rockspec

@@ -18,6 +18,7 @@ build = {
     type = "builtin",
     modules = {
         ["expirationd"] = "expirationd/init.lua",
+        ["expirationd.version"] = "expirationd/version.lua",
         ["cartridge.roles.expirationd"] = "cartridge/roles/expirationd.lua",
     }
 }

expirationd/init.lua

@@ -682,15 +682,14 @@ local function default_iterate_with(task)
     end
 end
 
-
 -- ========================================================================= --
--- Expiration daemon management functions
+-- Expiration daemon management functions and module constants
 -- ========================================================================= --
 --
--- {{{ Module functions
+-- {{{ Module functions and constants
 --
 
---- Module functions
+--- Module functions and constants
 --
 -- @section Functions
 
@@ -1311,6 +1310,9 @@ return {
     get_tasks      = get_tasks_obsolete,
     run_task       = run_task_obsolete,
     show_task_list = show_task_list_obsolete,
+
+    --- Current module version in string format `MAJOR.MINOR.PATCH`.
+    _VERSION = require('expirationd.version'),
 }
 
--- }}} Module functions
+-- }}} Module functions and constants

expirationd/version.lua

@@ -0,0 +1,4 @@
+-- Сontains the module version.
+-- Requires manual update in case of release commit.
+
+return '1.3.1'