Initial template and merge code

DESIGN.md

@@ -32,11 +32,11 @@ It should:
 * Start/reload/configure the proxy as needed
 * Periodically check the functions are still running
 
-Intentionally: No HA yet, no multiple instances of functions, no 
+Intentionally: No HA yet, no multiple instances of functions, no
 up/downscaling, no multiple versions routed by header.
 
 # Implementation Ideas
 
 * caddy for proxy? It's simple, fast, API-configurable.
 * Local docker registry for images? See https://www.docker.com/blog/how-to-use-your-own-registry-2/
-* Maybe grip for crystal template? Maybe kemal?
+* Maybe grip for crystal template? Maybe kemal?

examples/hello_cr/function.cr

@@ -0,0 +1,3 @@
+get "/" do
+  "Hello World!"
+end

src/faaso.cr

@@ -1,4 +1,6 @@
 require "commander"
+require "file_utils"
+require "uuid"
 
 # TODO: Write documentation for `Faaso`
 module Faaso
@@ -19,7 +21,15 @@ module Faaso
           puts "Building function... #{arg}"
           # A function is a folder with stuff in it
           # TODO: decide template based on file extensions or other metadata
+          template = "templates/crystal"
           # TODO: copy template and add function files to it
+          tmp_dir = "tmp/#{UUID.random}"
+          Dir.mkdir_p("tmp") unless File.exists? "tmp"
+          FileUtils.cp_r(template, tmp_dir)
+          Dir.glob(arg + "/**/*").each do |file|
+            FileUtils.cp(file, tmp_dir)
+          end
+
           # TODO: build Docker image
           # TODO: push Docker image to registry
           # TODO: return image name for testing

templates/crystal-http/function/handler.cr

@@ -1,12 +0,0 @@
-require "http/request"
-require "http/headers"
-
-class Handler
-  def run(request : HTTP::Request)
-    {
-      body:        "Hello, Crystal. You said: #{request.body.try(&.gets_to_end)}",
-      status_code: 200,
-      headers:     HTTP::Headers{"Content-Type" => "text/plain"},
-    }
-  end
-end

templates/crystal-http/function/shard.yml

@@ -1,2 +0,0 @@
-name: crystal-http-template
-version: 0.1.0

templates/crystal-http/main.cr

@@ -1,41 +0,0 @@
-require "http/server"
-require "./function/handler"
-
-server = HTTP::Server.new do |context|
-  response_triple : NamedTuple(body: String, headers: HTTP::Headers, status_code: Int32) |
-                    NamedTuple(body: String, headers: HTTP::Headers) |
-                    NamedTuple(body: String, status_code: Int32) |
-                    NamedTuple(body: String) |
-                    NamedTuple(headers: HTTP::Headers, status_code: Int32) |
-                    NamedTuple(headers: HTTP::Headers) |
-                    NamedTuple(status_code: Int32)
-
-  handler = Handler.new
-  response_triple = handler.run(context.request)
-
-  if response_triple.is_a?(NamedTuple(body: String, headers: HTTP::Headers, status_code: Int32) |
-                           NamedTuple(body: String, status_code: Int32) |
-                           NamedTuple(headers: HTTP::Headers, status_code: Int32) |
-                           NamedTuple(status_code: Int32))
-    context.response.status_code = response_triple[:status_code]
-  end
-
-  if response_triple.is_a?(NamedTuple(body: String, headers: HTTP::Headers, status_code: Int32) |
-                           NamedTuple(body: String, headers: HTTP::Headers) |
-                           NamedTuple(headers: HTTP::Headers, status_code: Int32) |
-                           NamedTuple(headers: HTTP::Headers))
-    response_triple[:headers].each do |key, value|
-      context.response.headers[key] = value
-    end
-  end
-
-  if response_triple.is_a?(NamedTuple(body: String, headers: HTTP::Headers, status_code: Int32) |
-                           NamedTuple(body: String, headers: HTTP::Headers) |
-                           NamedTuple(body: String, status_code: Int32) |
-                           NamedTuple(body: String))
-    context.response.print(response_triple[:body])
-  end
-end
-
-server.bind_tcp "0.0.0.0", 5000
-server.listen

templates/crystal-http/template.yml

@@ -1,6 +0,0 @@
-language: crystal
-fprocess: ./handler
-welcome_message: |
-  You have created a new function which uses crystal 1.0.0.
-  To include third-party dependencies, use a vendoring tool like shards:
-  shards documentation: https://github.com/crystal-lang/shards

templates/crystal/Dockerfile

@@ -1,10 +1,6 @@
-FROM --platform=${TARGETPLATFORM:-linux/amd64} ghcr.io/openfaas/of-watchdog:0.9.10 as watchdog
 FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine as build
-ARG ADDITIONAL_PACKAGE
 
-COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
-
-RUN apk update && apk upgrade && apk add crystal shards openssl-dev ${ADDITIONAL_PACKAGE} && apk cache clean
+RUN apk update && apk upgrade && apk add crystal shards openssl-dev && apk cache clean
 
 WORKDIR /home/app
 

templates/crystal/main.cr

@@ -0,0 +1,4 @@
+require "kemal"
+require "./function.cr"
+
+Kemal.run

templates/crystal/shard.yml

@@ -0,0 +1,15 @@
+name: function
+version: 0.1.0
+
+targets:
+  function:
+    main: main.cr
+
+dependencies:
+  kemal:
+    github: kemalcr/kemal
+
+# development_dependencies:
+#   webmock:
+#     github: manastech/webmock.cr
+