Swiftだけで作るIoTシステム

$ brew install vapor/tap/vapor

$ vapor new all-swift-iot-server --template=api
$ cd all-swift-iot-server
$ vapor xcode

$ vapor heroku init
Would you like to provide a custom Heroku app name?
y/n> y
Custom app name:
> hoge
Would you like to deploy to a region other than the US?
y/n> n
https://hoge.herokuapp.com/ | https://git.heroku.com/hoge

Would you like to provide a custom Heroku buildpack?
y/n> n
Setting buildpack...
Are you using a custom Executable name?
y/n> n
Setting procfile...
Committing procfile...
Would you like to push to Heroku now?
y/n> y
This may take a while...

（中略）

Building on Heroku ... ~5-10 minutes [Failed]
Error: Heroku push failed remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Swift app detected
remote:
remote:  ! This buildpack does not support the heroku-18 stack at the moment.
remote:  ! Downgrade your application to the heroku-16 stack with the following command:
remote:      $ heroku stack:set heroku-16 -a <your-application-name>
remote:
remote:  ! Then deploy the application again.
remote:
remote:  !     Push rejected, failed to compile Swift app.
remote:
remote:  !     Push failed
remote: Verifying deploy...
remote:
remote: !       Push rejected to hoge.
remote:
To https://git.heroku.com/hoge.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/hoge.git'

$ heroku stack:set heroku-16 -a hoge
Stack set. Next release on ⬢ hoge will use heroku-16.
Run git push heroku master to create a new release on ⬢ hoge.

$ git push heroku master
Counting objects: 50, done.

（中略）

remote: Verifying deploy... done.
To https://git.heroku.com/hoge.git
 * [new branch]      master -> master

$ curl -X POST -H 'Content-Type:application/json' -d '{"led":false}' https://hoge.herokuapp.com/deviceStatus
{"id":1,"led":false}

$ curl -X PUT -H 'Content-Type:application/json' -d '{"led":true}' https://hoge.herokuapp.com/deviceStatus/1
{"id":1,"led":true}

$ curl -X GET -H 'Content-Type:application/json' https://hoge.herokuapp.com/deviceStatus/1
{"id":1,"led":true}

    // Configure a PostgreSQL database
    guard let databaseUrl = Environment.get("DATABASE_URL") else {
        fatalError("DATABASE_URL needed")
    }
    guard let pgConfig = PostgreSQLDatabaseConfig(url: databaseUrl, transport: .unverifiedTLS) else {
        fatalError("Invalid DATABASE_URL format")
    }
    let pg = PostgreSQLDatabase(config: pgConfig)

$ sudo apt install clang-3.8 libicu-dev libcurl4-nss-dev

$ tar xzvf swift-4.1.3-RPi23-RaspbianStretch.tgz

$ mkdir SwiftyPi && cd SwiftyPi
$ swift package init --type executable

$ swift build
$ API_URL=https://hoge.herokuapp.com/deviceStatus/1 swift run

$ swift build
error: terminated(1): which clang output:

$ sudo ln -s /usr/bin/clang-3.8 /usr/bin/clang

$ swift build
Compile Swift Module 'SwiftyPi' (1 sources)
Linking ./.build/armv7-unknown-linux-gnueabihf/debug/SwiftyPi

$ sudo apt-get install cmake ninja-build clang python uuid-dev libicu-dev icu-devtools libbsd-dev libedit-dev libxml2-dev libsqlite3-dev swig libpython-dev libncurses5-dev pkg-config libblocksruntime-dev libcurl4-openssl-dev autoconf libtool systemtap-sdt-dev

// このURLはデプロイ先のものに変えてください
fileprivate let API_URL = "https://hoge.herokuapp.com/deviceStatus/1"