Add app.json and allow to configure through config vars

app.json

@@ -0,0 +1,28 @@
+{
+  "name": "Pd2pg",
+  "description": "Pager duty info in a local postgres database",
+  "keywords": [
+    "small",
+    "sharp",
+    "tool"
+  ],
+  "addons": [
+    "heroku-postgresql:standard-0"
+  ],
+  "scripts": {
+    "postdeploy": "bundle exec bin/setup"
+  },
+  "env": {
+    "LANG": "en_US.UTF-8",
+    "PAGERDUTY_SUBDOMAIN": {
+      "description": "your-company subdomain",
+      "value": "",
+      "required": true
+    },
+    "PAGERDUTY_API_KEY": {
+      "description": "a read-only API key from https://<PAGERDUTY_SUBDOMAIN>.pagerduty.com/api_keys",
+      "value": "",
+      "required": true
+    }
+  }
+}

bin/setup

@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+require "sequel"
+done = false
+while !done
+  begin
+    db = Sequel.connect(ENV['DATABASE_URL'])
+    db.run(File.read('schema.sql'))
+    done = true
+  rescue Sequel::DatabaseConnectionError => e
+    puts "DB is not ready"
+  end
+end

pd2pg.rb

@@ -7,20 +7,20 @@
 # Ensure all data processing and storage is in UTC.
 ENV["TZ"] = "UTC"
 
-class PG2PD
+class PD2PG
   # Largest page size allowed.
-  PAGINATION_LIMIT = 100
+  PAGINATION_LIMIT = (ENV["PAGINATION_LIMIT"] || 100).to_i
 
   # Rewind by ~1h when doing incremental updates, to ensure we don't
   # miss anything.
-  INCREMENTAL_BUFFER = 60*60
+  INCREMENTAL_BUFFER = (ENV["INCREMENTAL_BUFFER"] || 60*60).to_i
 
   # Apply incremental updates atomically for ~24 hour windows, instead
   # of trying to fetch all of history and apply it at once.
-  INCREMENTAL_WINDOW = 60*60*24
+  INCREMENTAL_WINDOW = (ENV["INCREMENTAL_WINDOW"] || 60*60*24).to_i
 
   # Earliest time PagerDuty data could be available.
-  PAGERDUTY_EPOCH = Time.parse("2009-01-01T00:00Z")
+  PAGERDUTY_EPOCH = Time.parse(ENV["PAGERDUTY_EPOCH"] || "2009-01-01T00:00Z")
 
   # Reads required config from environment variables.
   def env!(k)
@@ -236,4 +236,4 @@ def refresh
   end
 end
 
-PG2PD.new.refresh
+PD2PG.new.refresh