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

Author: GRISHNOV

.github/workflows/push_rockspec.yaml

@@ -11,9 +11,18 @@ env:
   ROCK_NAME: "crud"
 
 jobs:
+  version-check:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check module version
+        uses: tarantool/actions/check-module-version@igrishnov/gh-204-add-hardcoded-versioning-support
+        with:
+          module-name: 'crud'
+
   push-scm-rockspec:
     runs-on: ubuntu-20.04
     if: github.ref == 'refs/heads/master'
+    needs: version-check
     steps:
       - uses: actions/checkout@master
 
@@ -25,6 +34,7 @@ jobs:
   push-tagged-rockspec:
     runs-on: ubuntu-20.04
     if: startsWith(github.ref, 'refs/tags')
+    needs: version-check
     steps:
       - uses: actions/checkout@master
 

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+* Add versioning support (PR #342).
 
 ### Fixed
 * Pre-hotreload `cartridge` support (older than 2.4.0) (PR #341).

crud.lua

@@ -23,6 +23,16 @@ local stats = require('crud.stats')
 
 local crud = {}
 
+-- @refer crud.version
+-- @tfield string _VERSION
+--  Contains hardcoded value of the CRUD version.
+--  The version value is marked in the separate file
+--  crud/version.lua and must be updated manually in
+--  case of release commit.
+--  Thus, it is possible to get the module version
+--  via require('crud')._VERSION as string value.
+crud._VERSION = require('crud.version')
+
 --- CRUD operations.
 -- @section crud
 

crud/version.lua

@@ -0,0 +1,4 @@
+-- Сontains the module version.
+-- Requires manual update in case of release commit.
+
+return '1.0.0'