“Scriptify” deployment

.github/deploy

@@ -0,0 +1,172 @@
+#!/usr/bin/swift sh
+import func Darwin.fputs
+import var Darwin.stderr
+import PMKFoundation  // PromiseKit/Foundation ~> 3.3
+import LegibleError   // @mxcl ~> 1.0
+import Foundation
+import PromiseKit     // @mxcl ~> 6.8
+import Path           // mxcl/Path.swift == master
+
+let env = ProcessInfo.processInfo.environment
+let token = env["GITHUB_TOKEN"] ?? env["GITHUB_ACCESS_TOKEN"]!
+let slug = env["TRAVIS_REPO_SLUG"]!
+let tag = env["TRAVIS_TAG"]!
+
+func fatal(message: String) -> Never {
+    fputs("error: \(message)\n", stderr)
+    exit(1)
+}
+func fatal(error: Error) -> Never {
+    fatal(message: error.legibleLocalizedDescription)
+}
+
+guard let licenseFile = try Path.cwd.ls().files.first(where: {
+    $0.basename().hasPrefix("LICENSE")
+})?.basename() else {
+    fatal(message: "no LICENSE file found")
+}
+
+struct Repo: Decodable {
+    let description: String
+    let license: License
+    struct License: Decodable {
+        let spdx_id: String
+    }
+}
+
+struct Package: Decodable {
+    let swiftLanguageVersions: [String]
+    let targets: [Target]
+    struct Target: Decodable {
+        let path: String?
+        let type: Kind
+        enum Kind: String, Decodable {
+            case regular
+            case test
+        }
+    }
+}
+
+extension URLRequest {
+    init(github path: String) {
+        let url = URL(string: "https://api.github.com\(path)")!
+        self.init(url: url)
+        setValue("token \(token)", forHTTPHeaderField: "Authorization")
+        setValue("application/json", forHTTPHeaderField: "Content-Type")
+        setValue("application/json", forHTTPHeaderField: "Accept")
+    }
+}
+
+func description() -> Promise<Repo> {
+    let rq = URLRequest(github: "/repos/\(slug)")
+    return firstly {
+        URLSession.shared.dataTask(.promise, with: rq).validate()
+    }.map { data, _ in
+        try JSONDecoder().decode(Repo.self, from: data)
+    }
+}
+
+struct User: Decodable {
+    let name: String
+    let email: String
+}
+
+func email() -> Promise<User> {
+    let rq = URLRequest(github: "/user")
+    return firstly {
+        URLSession.shared.dataTask(.promise, with: rq).validate()
+    }.map { data, _ in
+        try JSONDecoder().decode(User.self, from: data)
+    }
+}
+
+func dumpPackage() -> Promise<Package> {
+    let task = Process()
+    task.launchPath = "/usr/bin/swift"
+    task.arguments = ["package", "dump-package"]
+    return firstly {
+        task.launch(.promise)
+    }.map { out, _ in
+        out.fileHandleForReading.readDataToEndOfFile()
+    }.map { data in
+        try JSONDecoder().decode(Package.self, from: data)
+    }
+}
+
+var defaultSwiftVersion: String {
+    let task = Process()
+    task.launchPath = "/usr/bin/swift"
+    task.arguments = ["--version"]
+
+    func extract(input: String) -> String {
+        let range = input.range(of: #"Apple Swift version \d+\.\d+"#, options: .regularExpression)!
+        return String(input[range].split(separator: " ").last!)
+    }
+
+    return try! firstly {
+        task.launch(.promise)
+    }.compactMap { out, _ in
+        String(data: out.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8)
+    }.map { out in
+        extract(input: out)
+    }.wait()
+}
+
+func podspec(repo: Repo, user: User, pkg: Package) -> (Substring, String) {
+    let (owner, name) = { ($0[0], $0[1]) }(slug.split(separator: "/"))
+    let swiftVersion = pkg.swiftLanguageVersions.max() ?? defaultSwiftVersion
+    let sources = pkg.targets.filter{ $0.type == .regular }.compactMap{ $0.path }.first!
+    return (name, """
+    Pod::Spec.new do |s|
+      s.name = '\(name)'
+      s.version = '\(tag)'
+      s.summary = '\(repo.description)'
+      s.homepage = "https://github.com/\(slug)"
+      s.license = { type: '\(repo.license.spdx_id)', file: '\(licenseFile)' }
+      s.author = { '\(user.name)': '\(user.email)' }
+      s.source = { git: "https://github.com/\(slug).git", tag: '\(tag)' }
+      s.social_media_url = 'https://twitter.com/\(owner)'
+      s.osx.deployment_target = '10.10'
+      s.ios.deployment_target = '8.0'
+      s.tvos.deployment_target = '9.0'
+      s.watchos.deployment_target = '2.0'
+      s.source_files = '\(sources)/*.swift'
+      s.swift_version = '\(swiftVersion)'
+    end
+    """)
+}
+
+func publishRelease() throws -> Promise<Void> {
+    struct Input: Encodable {
+        var tag_name: String { return tag }
+        var name: String { return tag }
+        let body = ""
+    }
+
+    var rq = URLRequest(github: "/repos/\(slug)/releases")
+    rq.httpMethod = "POST"
+    rq.httpBody = try JSONEncoder().encode(Input())
+    return URLSession.shared.dataTask(.promise, with: rq).validate().asVoid()
+}
+
+switch CommandLine.arguments[1] {
+case "generate-podspec":
+    firstly {
+        when(fulfilled: description(), email(), dumpPackage())
+    }.map(podspec).done { name, podspec in
+        try podspec.write(toFile: "\(name).podspec", atomically: false, encoding: .utf8)
+        exit(0)
+    }.catch {
+        fatal(error: $0)
+    }
+case "publish-release":
+    try publishRelease().done {
+        exit(0)
+    }.catch {
+        fatal(error: $0)
+    }
+default:
+    fatal(message: "invalid usage")
+}
+
+RunLoop.main.run()

.github/jazzy.yml

@@ -0,0 +1,13 @@
+module: Path
+custom_categories:
+  - name: Path
+    children:
+      - Path
+      - /(_:_:)
+xcodebuild_arguments:
+  - UseModernBuildSystem=NO
+output:
+  ../output
+  # output directory is relative to config file… ugh
+exclude:
+  - Sources/Path+StringConvertibles.swift

.travis.yml

@@ -52,7 +52,7 @@ jobs:
 
     - <<: *linux
       env: SWIFT_VERSION='5.0-DEVELOPMENT-SNAPSHOT-2019-01-22-a'
-      name: Linux / Swift 5.0.0-dev (2019-01-22)
+      name: Linux / Swift 5.0.0-dev+2019-01-22
 
     - stage: pretest
       name: Check Linux tests are sync’d
@@ -61,29 +61,12 @@ jobs:
 
     - stage: deploy
       name: Jazzy
-      before_install: |
-        cat <<\ \ EOF> .jazzy.yaml
-        module: Path
-        module_version: TRAVIS_TAG
-        custom_categories:
-          - name: Path
-            children:
-              - Path
-              - /(_:_:)
-        xcodebuild_arguments:
-          - UseModernBuildSystem=NO
-        output: output
-        github_url: https://github.com/mxcl/Path.swift
-        exclude:
-          - Sources/Path+StringConvertibles.swift
-        EOF
-        sed -i '' "s/TRAVIS_TAG/$TRAVIS_TAG/" .jazzy.yaml
-      # ^^ this weirdness because Travis multiline YAML is broken and inserts
-      # two spaces in front of the output which means we need a prefixed
-      # delimiter which also weirdly stops bash from doing variable substitution
       install: gem install jazzy
       before_script: swift package generate-xcodeproj
-      script: jazzy
+      script: |
+        jazzy --config .github/jazzy.yml \
+              --module-version $TRAVIS_TAG \
+              --github_url "https://github.com/$TRAVIS_REPO_SLUG"
       deploy:
         provider: pages
         skip-cleanup: true
@@ -93,43 +76,8 @@ jobs:
           tags: true
 
     - name: CocoaPods
-      before_install: export TRAVIS_REPO_NAME=${TRAVIS_REPO_SLUG#*/}
-      install: gem install cocoapods
-      before_script: |
-        export DESCRIPTION=$(swift - <<\ \ EOF
-          import Foundation
-          struct Response: Decodable { let description: String }
-          let token = ProcessInfo.processInfo.environment["GITHUB_TOKEN"]!
-          let slug = ProcessInfo.processInfo.environment["TRAVIS_REPO_SLUG"]!
-          let url = URL(string: "https://api.github.com/repos/\(slug)")!
-          var rq = URLRequest(url: url)
-          rq.setValue("token \(token)", forHTTPHeaderField: "Authorization")
-          let semaphore = DispatchSemaphore(value: 0)
-          var data: Data!
-          URLSession.shared.dataTask(with: rq) { d, _, _ in
-              data = d
-              semaphore.signal()
-          }.resume()
-          semaphore.wait()
-          let rsp = try JSONDecoder().decode(Response.self, from: data)
-          print(rsp.description, terminator: "")
-        EOF)
-        cat <<\ \ EOF> $TRAVIS_REPO_NAME.podspec
-        Pod::Spec.new do |s|
-          s.name = ENV['TRAVIS_REPO_NAME']
-          s.version = ENV['TRAVIS_TAG']
-          s.summary = ENV['DESCRIPTION']
-          s.homepage = "https://github.com/#{ENV['TRAVIS_REPO_SLUG']}"
-          s.license = { type: 'Unlicense', file: 'LICENSE.md' }
-          s.author = { mxcl: 'mxcl@me.com' }
-          s.source = { git: "https://github.com/#{ENV['TRAVIS_REPO_SLUG']}.git", tag: s.version }
-          s.social_media_url = 'https://twitter.com/mxcl'
-          s.osx.deployment_target = '10.10'
-          s.ios.deployment_target = '8.0'
-          s.tvos.deployment_target = '10.0'
-          s.watchos.deployment_target = '3.0'
-          s.source_files = 'Sources/*'
-          s.swift_version = '4.2'
-        end
-        EOF
+      before_install: gem install cocoapods
+      install: brew install mxcl/made/swift-sh
+      before_script: .github/deploy generate-podspec
       script: pod trunk push
+      after_success: .github/deploy post-release