Support rc in version checks

fastify.js

@@ -315,6 +315,7 @@ function fastify (options) {
 
   Object.defineProperties(fastify, {
     pluginName: {
+      configurable: true,
       get () {
         if (this[kPluginNameChain].length > 1) {
           return this[kPluginNameChain].join(' -> ')
@@ -323,18 +324,23 @@ function fastify (options) {
       }
     },
     prefix: {
+      configurable: true,
       get () { return this[kRoutePrefix] }
     },
     validatorCompiler: {
+      configurable: true,
       get () { return this[kSchemaController].getValidatorCompiler() }
     },
     serializerCompiler: {
+      configurable: true,
       get () { return this[kSchemaController].getSerializerCompiler() }
     },
     version: {
+      configurable: true,
       get () { return VERSION }
     },
     errorHandler: {
+      configurable: true,
       get () {
         return this[kErrorHandler].func
       }

lib/pluginUtils.js

@@ -103,7 +103,8 @@ function checkVersion (fn) {
 
   const requiredVersion = meta.fastify
 
-  if (requiredVersion && !semver.satisfies(this.version, requiredVersion)) {
+  const sanitizedVersion = this.version.replace(/-rc.\d+$/, '')
+  if (requiredVersion && !semver.satisfies(sanitizedVersion, requiredVersion)) {
     throw new FST_ERR_PLUGIN_VERSION_MISMATCH(meta.name, requiredVersion, this.version)
   }
 }

test/plugin.test.js

@@ -1028,3 +1028,27 @@ test('plugin metadata - version not matching requirement 3', t => {
     done()
   }
 })
+
+test('plugin metadata - release candidate', t => {
+  t.plan(2)
+  const fastify = Fastify()
+  Object.defineProperty(fastify, 'version', {
+    value: '99.0.0-rc.1'
+  })
+
+  plugin[Symbol.for('plugin-meta')] = {
+    name: 'plugin',
+    fastify: '99.x'
+  }
+
+  fastify.register(plugin)
+
+  fastify.ready((err) => {
+    t.error(err)
+    t.pass('everything right')
+  })
+
+  function plugin (instance, opts, done) {
+    done()
+  }
+})