api: add hardcoded versioning support

.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: 'errors'
+
   publish-scm-1:
     if: github.ref == 'refs/heads/master'
     runs-on: ubuntu-20.04
@@ -18,6 +28,7 @@ jobs:
 
   publish-tag:
     if: startsWith(github.ref, 'refs/tags/')
+    needs: version-check
     runs-on: ubuntu-20.04
     env:
       CMAKE_LDOC_FIND_REQUIRED: 'YES'

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- Add versioning support.
+
 ## [2.2.1] - 2021-08-16
 
 ### Fixed

errors.lua

@@ -561,6 +561,8 @@ local function errors_assert(class_name, ...)
 end
 
 return {
+    _VERSION = require('errors.version'),
+
     list = list,
     new_class = new_class,
     netbox_call = netbox_call,

errors/version.lua

@@ -0,0 +1,4 @@
+-- Сontains the module version.
+-- Requires manual update in case of release commit.
+
+return '2.2.1'