Merge branch 'master' of https://github.com/navarasu/serverless-ruby-layer into fix_11_add_docs

Author: navarasu

examples/using_docker_file/Dockerfile examples/use_docker_file/Dockerfileexamples/using_docker_file/Dockerfile renamed to examples/use_docker_file/Dockerfile

@@ -0,0 +1,2 @@
+source 'https://rubygems.org'
+gem 'pg'

examples/using_docker_file/Gemfile examples/use_docker_file/Gemfileexamples/using_docker_file/Gemfile renamed to examples/use_docker_file/Gemfile

@@ -0,0 +1,8 @@
+require 'pg'
+
+def hello(event:, context:)
+  { statusCode: 200, body: {
+    "pg_version": PG.library_version
+    }
+  }
+end

examples/using_docker_file/handler.rb examples/use_docker_file/handler.rbexamples/using_docker_file/handler.rb renamed to examples/use_docker_file/handler.rb

@@ -0,0 +1,20 @@
+service: using-docker-file 
+
+plugins:
+  - serverless-ruby-layer
+
+custom:
+  rubyLayer:
+    use_docker: true
+    docker_yums:
+      - postgresql-devel
+    native_libs:
+      - /usr/lib64/libpq.so.5
+
+provider:
+  name: aws
+  runtime: ruby2.5
+
+functions:
+  hello:
+    handler: handler.hello

examples/using_docker_file/serverless.yml examples/use_docker_file/serverless.ymlexamples/using_docker_file/serverless.yml renamed to examples/use_docker_file/serverless.yml

@@ -44,9 +44,22 @@ function bundleInstall(){
     if (ps.error && ps.error.code === 'ENOENT') {
       throw new Error('docker command not found');
     }
+    let buildDocker = false;
     if (this.options.docker_file) {
       fs.copySync(path.join(this.servicePath, this.options.docker_file),
                   path.join(this.ruby_layer,'Dockerfile'))
+      buildDocker = true
+    }else if (this.options.docker_yums) {
+      docker_steps =['FROM lambci/lambda:build-'+this.serverless.service.provider.runtime]
+      this.options.docker_yums.forEach(function(package_name) {
+        docker_steps.push('RUN yum install -y '+package_name)
+      })
+      docker_steps.push('RUN gem update bundler')
+      docker_steps.push('CMD "/bin/bash"')
+      fs.writeFileSync(path.join(this.ruby_layer,'Dockerfile'),docker_steps.join('\n'))
+      buildDocker = true
+    }
+    if (buildDocker) {
       docker_name ='ruby-layer:docker'
       docker(['build', '-t', docker_name, '-f', 'Dockerfile', '.'], options,this.cli)
     }