Basic runtime template implementation

examples/hello_crystal/README.md

@@ -0,0 +1,3 @@
+# README
+
+This is the readme for people trying to *use* this runtime.

runtimes/crystal/README.md

@@ -0,0 +1,4 @@
+# README
+
+This is the readme for people wanting to change this runtime,
+not for people trying to use it

runtimes/crystal/template/README.md.j2

@@ -0,0 +1,11 @@
+# Readme for {{name | title}}
+
+This is a funko using the Crystal runtime for [FaaSO](https://git.ralsina.me/ralsina/faaso)
+
+## What is {{name | title}}
+
+Write here what it is
+
+## How to use {{name | title}}
+
+And so on.

runtimes/crystal/template/funko.cr

@@ -0,0 +1,16 @@
+require "kemal"
+
+# This is a kemal app, you can add handlers, middleware, etc.
+
+# A basic hello world get endpoint
+get "/" do
+  "Hello World Crystal!"
+end
+
+# The `/ping/` endpoint is configured in the container as a healthcheck
+# You can make it better by checking that your database is responding
+# or whatever checks you think are important
+#
+get "/ping/" do
+  "OK"
+end

runtimes/crystal/template/funko.yml

@@ -0,0 +1,2 @@
+name: hello
+runtime: crystal

src/commands/new.cr

@@ -22,15 +22,60 @@ module Faaso
           return 0
         end
 
-        # Create folder with a preconfigured funko for this runtime
+        # Get runtime template files list
+        template_base = "" 
+        template_files = [] of String
         if @@known.includes? "./runtimes/#{runtime}"
           Log.info { "Using known runtime #{runtime}" }
+          template_base = "./runtimes/#{runtime}/template"
+          template_files = @@filelist.select { |f| f.starts_with? template_base }
         elsif File.exists? runtime
           Log.info { "Using directory #{runtime} as runtime" }
+          template_base = "#{runtime}/template"
+          template_files = Dir.glob("#{template_base}/**/*")
         else
           Log.error { "Can't find runtime #{runtime}" }
           return 1
         end
+
+        pp! template_files
+
+        # Create new folder
+        if Dir.exists? folder
+          Log.error { "Folder #{folder} already exists" }
+          return 1
+        end
+
+        Dir.mkdir_p folder
+
+        template_files.each do |f|
+          content = IO::Memory.new
+          # We need to use RUCKSACK_MODE=0 so it
+          # fallbacks to the filesystem
+          rucksack(f).read(content)
+          if content.nil?
+            Log.error { "Can't find file #{f}" }
+            return 1
+          end
+
+          # f is like "#{template_base}/foo"
+          # dst is like #{folder}/foo
+          dst = Path[folder] / Path[f].relative_to(template_base)
+          # Render templated files
+          if f.ends_with? ".j2"
+            dst = dst.sibling(dst.stem)
+            Log.info { "Creating file #{dst} from #{f}" }
+            File.open(dst, "w") do |file|
+              file << Crinja.render(content.to_s, {"name" => Path[folder].basename})
+            end
+          else  # Just copy the file
+            Log.info { "Creating file #{dst} from #{f}" }
+            File.open(dst, "w") do |file|
+              file << content.to_s
+            end
+          end
+        end
+
         0
       end
     end