commit 826b1b406c1c6fda0f7e819d3b37af763e248edc · jonmsterling.com/swift-pterodactyl

Package.swift

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       			name: "PterodactylBuildTests",

     

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       			dependencies: [

     

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       				"PterodactylBuild",

     

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       				"PterodactylSyntax",

     

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       				.product(name: "llbuild2fx", package: "swift-llbuild2")

     

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       			]

     

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       		),

+42 -14

Sources/PterodactylBuild/Keys/AnalyseImports.swift

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       import Foundation

     

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       import TSCBasic

     

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       import llbuild2fx

     

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       import PterodactylSyntax

     

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       private struct ImportParser {

     

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       	private var lexer: PterodactylSyntax.Lexer

     

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       	public private(set) var imports: [String] = []

     

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       	public init(input: String) {

     

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       		self.lexer = PterodactylSyntax.Lexer(input: input)

     

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       	}

     

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       	public mutating func parseHeader() {

     

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       		while true {

     

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       			let token = nextSignificantToken()

     

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       			switch token.kind {

     

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       			case .keyword(.import): parseImportStatement()

     

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       			default: return

     

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       			}

     

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       		}

     

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       	}

     

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       	/// Returns the next non-whitespace token.

     

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       	private mutating func nextSignificantToken() -> Token {

     

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       		var token = lexer.nextToken()

     

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       		while case .whitespace = token.kind {

     

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       			token = lexer.nextToken()

     

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       		}

     

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       		return token

     

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       	}

     

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       	/// Parses a single `import xyz` line.

     

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       	private mutating func parseImportStatement() {

     

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       		let next = nextSignificantToken()

     

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       		guard next.kind == .identifier else { return }

     

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       		imports.append(next.text)

     

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       	}

     

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       }

     

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       extension Keys {

     

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       	struct AnalyseImports: BuildKey {

     
···

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       		func computeValue(_ ctx: BuildContext<Self>) async throws -> [UnitName] {

     

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       			let contents = try await ctx.load(blobId)

     

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       			let code = try await String(decoding: Data(ctx.read(blob: contents.blob!)), as: UTF8.self)

     

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       -
       

     

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       			var results: [UnitName] = []

     

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       			let lines = code.split(separator: "\n", omittingEmptySubsequences: false)

     

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       			for line in lines {

     

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       				let trimmed = line.trimmingCharacters(in: .whitespaces)

     

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       				guard trimmed.hasPrefix("import ") else { continue }

     

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       				let parts = trimmed.split(separator: " ", maxSplits: 1, omittingEmptySubsequences: true)

     

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       				if parts.count == 2 {

     

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       					let name = parts[1].trimmingCharacters(in: .whitespaces)

     

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       					results.append(UnitName(name: name))

     

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       				}

     

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       			var importParser = ImportParser(input: code)

     

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       			importParser.parseHeader()

     

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       			return importParser.imports.map { name in

     

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       				UnitName(basename: name)

     

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       			}

     

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       -
       

     

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       			return results

     

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       		}

     

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       	}

     

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       }

Sources/PterodactylBuild/Keys/Keys.swift Sources/PterodactylBuild/Keys.swift

+5 -5

Sources/PterodactylBuild/Types/UnitName.swift

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       // SPDX-License-Identifier: MPL-2.0

     

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       import Foundation

     

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       import llbuild2fx

     

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       import TSCBasic

     

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       import llbuild2fx

     

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       struct UnitName: Codable, Equatable, Hashable {

     

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       	var name: String

     

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       	var basename: String

     

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       }

     

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       extension UnitName: FXValue {}

     

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       extension UnitName {

     

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         static func fromPath(_ path: AbsolutePath) -> Self {

     

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           Self(name: path.basenameWithoutExt)

     

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         }

     

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       	static func fromPath(_ path: AbsolutePath) -> Self {

     

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       		Self(basename: path.basenameWithoutExt)

     

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       	}

     

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       }

+73

Sources/PterodactylSyntax/Lexer.swift

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       // SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers

     

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        //

     

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        // SPDX-License-Identifier: MPL-2.0

     

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        import Foundation

     

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       public struct Lexer {

     

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        	private let input: String

     

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        	private var index: String.Index

     

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       	private var tokens: [PterodactylSyntax.Token]

     

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       	public init(input: String) {

     

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        		self.input = input

     

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        		self.index = input.startIndex

     

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        		self.tokens = []

     

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        	}

     

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        	static let keywords: [String: Keyword] = [

     

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        		"import": .import

     

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        	]

     

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        	public mutating func nextToken() -> Token {

     

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        		guard !isAtEnd else {

     

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        			return Token(kind: .eof, text: "")

     

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        		}

     

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        		let char = currentChar

     

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        		if char.isNewline {

     

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        			advance()

     

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        			return Token(kind: .whitespace(.newline), text: String(char))

     

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        		}

     

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        		if char.isWhitespace {

     

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        			let text = readWhile { $0.isWhitespace && !$0.isNewline }

     

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        			return Token(kind: .whitespace(.other), text: text)

     

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        		}

     

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        		if char.isLetter {

     

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        			let word = readWhile { $0.isLetter || $0.isNumber || $0 == "_" }

     

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        			let kind: TokenKind =

     

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        				if let keyword = Self.keywords[word] {

     

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        					.keyword(keyword)

     

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        				} else {

     

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        					.identifier

     

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        				}

     

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        			return Token(kind: kind, text: word)

     

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        		}

     

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        		advance()

     

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        		return Token(kind: .error, text: String(char))

     

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        	}

     

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        	private mutating func readWhile(_ condition: (Character) -> Bool) -> String {

     

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        		var result = ""

     

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        		while !isAtEnd && condition(currentChar) {

     

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        			result.append(currentChar)

     

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        			advance()

     

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        		}

     

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        		return result

     

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        	}

     

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        	private var currentChar: Character { input[index] }

     

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        	private var isAtEnd: Bool {

     

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        		index == input.endIndex

     

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        	}

     

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        	private mutating func advance() {

     

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        		guard index < input.endIndex else { return }

     

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        		index = input.index(after: index)

     

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        	}

     

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        }

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Sources/PterodactylSyntax/Types.swift

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       import Foundation

     

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       public enum Keyword: Codable, Equatable, Sendable {

     

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       	case `import`

     

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       }

     

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       public enum Whitespace: Codable, Equatable, Sendable {

     

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       	case newline

     

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       	case other

     

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       }

     

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       public enum TokenKind: Codable, Equatable, Sendable {

     

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         case eof

     

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       	case keyword(Keyword)

     

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       	case error

     

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       	case identifier

     

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       	case whitespace(Whitespace)

     

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       }

     

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       public enum SyntaxTreeKind: Codable, Equatable, Sendable {