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ci: addupdate-appcast script#171

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Merged
ethanndickson merged 6 commits intomainfromethan/update-appcast-script
May 30, 2025
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2 changes: 1 addition & 1 deletion.gitignore
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Original file line numberDiff line numberDiff line change
Expand Up@@ -291,7 +291,7 @@ xcuserdata
**/xcshareddata/WorkspaceSettings.xcsettings

### VSCode & Sweetpad ###
.vscode/**
**/.vscode/**
buildServer.json

# End of https://www.toptal.com/developers/gitignore/api/xcode,jetbrains,macos,direnv,swift,swiftpm,objective-c
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3 changes: 2 additions & 1 deletion.swiftlint.yml
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@@ -1,4 +1,5 @@
# TODO: Remove this once the grpc-swift-protobuf generator adds a lint disable comment
excluded:
- "**/*.pb.swift"
- "**/*.grpc.swift"
- "**/*.grpc.swift"
- "**/.build/"
3 changes: 3 additions & 0 deletionsscripts/update-appcast/.swiftlint.yml
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@@ -0,0 +1,3 @@
disabled_rules:
- todo
- trailing_comma
23 changes: 23 additions & 0 deletionsscripts/update-appcast/Package.swift
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@@ -0,0 +1,23 @@
// swift-tools-version: 6.0
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
name: "update-appcast",
platforms: [
.macOS(.v15),
],
dependencies: [
.package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
.package(url: "https://github.com/loopwerk/Parsley", from: "0.5.0"),
],
targets: [
.executableTarget(
name: "update-appcast", dependencies: [
.product(name: "ArgumentParser", package: "swift-argument-parser"),
.product(name: "Parsley", package: "Parsley"),
]
),
]
)
220 changes: 220 additions & 0 deletionsscripts/update-appcast/Sources/main.swift
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import ArgumentParser
import Foundation
import RegexBuilder
#if canImport(FoundationXML)
import FoundationXML
#endif
import Parsley

/// UpdateAppcast
/// -------------
/// Replaces an existing `<item>` for the **stable** or **preview** channel
/// in a Sparkle RSS feed with one containing the new version, signature, and
/// length attributes. The feed will always contain one item for each channel.
/// Whether the passed version is a stable or preview version is determined by the
/// number of components in the version string:
/// - Stable: `X.Y.Z`
/// - Preview: `X.Y.Z.N`
/// `N` is the build number - the number of commits since the last stable release.
@main
struct UpdateAppcast: AsyncParsableCommand {
static let configuration = CommandConfiguration(
abstract: "Updates a Sparkle appcast with a new release entry."
)

@Option(name: .shortAndLong, help: "Path to the appcast file to be updated.")
var input: String

@Option(
name: .shortAndLong,
help: """
Path to the signature file generated for the release binary.
Signature files are generated by `Sparkle/bin/sign_update
"""
)
var signature: String

@Option(name: .shortAndLong, help: "The project version (X.Y.Z for stable builds, X.Y.Z.N for preview builds).")
var version: String

@Option(name: .shortAndLong, help: "A description of the release written in GFM.")
var description: String?

@Option(name: .shortAndLong, help: "Path where the updated appcast should be written.")
var output: String

mutating func validate() throws {
guard FileManager.default.fileExists(atPath: signature) else {
throw ValidationError("No file exists at path \(signature).")
}
guard FileManager.default.fileExists(atPath: input) else {
throw ValidationError("No file exists at path \(input).")
}
}

// swiftlint:disable:next function_body_length
mutating func run() async throws {
let channel: UpdateChannel = isStable(version: version) ? .stable : .preview
let sigLine = try String(contentsOfFile: signature, encoding: .utf8)
.trimmingCharacters(in: .whitespacesAndNewlines)

guard let match = sigLine.firstMatch(of: signatureRegex) else {
throw RuntimeError("Unable to parse signature file: \(sigLine)")
}

let edSignature = match.output.1
guard let length = match.output.2 else {
throw RuntimeError("Unable to parse length from signature file.")
}

let xmlData = try Data(contentsOf: URL(fileURLWithPath: input))
let doc = try XMLDocument(data: xmlData, options: .nodePrettyPrint)

guard let channelElem = try doc.nodes(forXPath: "/rss/channel").first as? XMLElement else {
throw RuntimeError("<channel> element not found in appcast.")
}

guard let insertionIndex = (channelElem.children ?? [])
.enumerated()
.first(where: { _, node in
guard let item = node as? XMLElement,
item.name == "item",
item.elements(forName: "sparkle:channel")
.first?.stringValue == channel.rawValue
else { return false }
return true
})?.offset
else {
throw RuntimeError("No existing item found for channel \(channel.rawValue).")
}
// Delete the existing item
channelElem.removeChild(at: insertionIndex)

let item = XMLElement(name: "item")
switch channel {
case .stable:
item.addChild(XMLElement(name: "title", stringValue: "v\(version)"))
case .preview:
item.addChild(XMLElement(name: "title", stringValue: "Preview"))
}

if let description {
let description = description.replacingOccurrences(of: #"\r\n"#, with: "\n")
let descriptionDoc: Document
do {
descriptionDoc = try Parsley.parse(description)
} catch {
throw RuntimeError("Failed to parse GFM description: \(error)")
}
// <description><![CDATA[ …HTML… ]]></description>
let descriptionElement = XMLElement(name: "description")
let cdata = XMLNode(kind: .text, options: .nodeIsCDATA)
let html = descriptionDoc.body

cdata.stringValue = html
descriptionElement.addChild(cdata)
item.addChild(descriptionElement)
}

item.addChild(XMLElement(name: "pubDate", stringValue: rfc822Date()))
item.addChild(XMLElement(name: "sparkle:channel", stringValue: channel.rawValue))
item.addChild(XMLElement(name: "sparkle:version", stringValue: version))
item.addChild(XMLElement(
name: "sparkle:fullReleaseNotesLink",
stringValue: "https://github.com/coder/coder-desktop-macos/releases"
))
item.addChild(XMLElement(
name: "sparkle:minimumSystemVersion",
stringValue: "14.0.0"
))

let enclosure = XMLElement(name: "enclosure")
func addEnclosureAttr(_ name: String, _ value: String) {
// Force-casting is the intended API usage.
// swiftlint:disable:next force_cast
enclosure.addAttribute(XMLNode.attribute(withName: name, stringValue: value) as! XMLNode)
}
addEnclosureAttr("url", downloadURL(for: version, channel: channel))
addEnclosureAttr("type", "application/octet-stream")
addEnclosureAttr("sparkle:installationType", "package")
addEnclosureAttr("sparkle:edSignature", edSignature)
addEnclosureAttr("length", String(length))
item.addChild(enclosure)

channelElem.insertChild(item, at: insertionIndex)

let outputStr = doc.xmlString(options: [.nodePrettyPrint]) + "\n"
try outputStr.write(to: URL(fileURLWithPath: output), atomically: true, encoding: .utf8)
}

private func isStable(version: String) -> Bool {
// A version is a release version if it has three components (X.Y.Z)
guard let match = version.firstMatch(of: versionRegex) else { return false }
return match.output.4 == nil
}

private func downloadURL(for version: String, channel: UpdateChannel) -> String {
switch channel {
case .stable: "https://github.com/coder/coder-desktop-macos/releases/download/v\(version)/Coder-Desktop.pkg"
case .preview: "https://github.com/coder/coder-desktop-macos/releases/download/preview/Coder-Desktop.pkg"
}
}

private func rfc822Date(date: Date = Date()) -> String {
let fmt = DateFormatter()
fmt.locale = Locale(identifier: "en_US_POSIX")
fmt.timeZone = TimeZone(secondsFromGMT: 0)
fmt.dateFormat = "EEE, dd MMM yyyy HH:mm:ss Z"
return fmt.string(from: date)
}
}

enum UpdateChannel: String { case stable, preview }

struct RuntimeError: Error, CustomStringConvertible {
var message: String
var description: String { message }
init(_ message: String) { self.message = message }
}

extension Regex: @retroactive @unchecked Sendable {}

// Matches CFBundleVersion format: X.Y.Z or X.Y.Z.N
let versionRegex = Regex {
Anchor.startOfLine
Capture {
OneOrMore(.digit)
} transform: { Int($0)! }
"."
Capture {
OneOrMore(.digit)
} transform: { Int($0)! }
"."
Capture {
OneOrMore(.digit)
} transform: { Int($0)! }
Optionally {
Capture {
"."
OneOrMore(.digit)
} transform: { Int($0.dropFirst())! }
}
Anchor.endOfLine
}

let signatureRegex = Regex {
"sparkle:edSignature=\""
Capture {
OneOrMore(.reluctant) {
NegativeLookahead { "\"" }
CharacterClass.any
}
} transform: { String($0) }
"\""
OneOrMore(.whitespace)
"length=\""
Capture {
OneOrMore(.digit)
} transform: { Int64($0) }
"\""
}
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