1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
import ArgumentParser
import Foundation
import WIT
import WITExtractor
import WITOverlayGenerator
@main
struct WITTool: ParsableCommand {
static let configuration = CommandConfiguration(
commandName: "wit-tool",
abstract: "WIT-related tool set",
subcommands: [Validate.self, GenerateOverlay.self, ExtractWIT.self]
)
/// Create a semantics analysis context by loading the given `wit` directory or `.wit` file path.
static func deriveSemanticsContext(path: String, loader: LocalFileLoader) throws -> SemanticsContext {
let packageResolver: PackageResolver
let mainPackage: PackageUnit
if FileManager.default.isDirectory(filePath: path) {
(mainPackage, packageResolver) = try PackageResolver.parse(
directory: path, loader: loader
)
} else {
packageResolver = PackageResolver()
let sourceFile = try SourceFileSyntax.parse(filePath: path, loader: loader)
mainPackage = try packageResolver.register(packageSources: [sourceFile])
}
return SemanticsContext(rootPackage: mainPackage, packageResolver: packageResolver)
}
}
struct Validate: ParsableCommand {
static let configuration = CommandConfiguration(
abstract: "Validate a WIT package"
)
@Argument
var path: String
func run() throws {
let loader = LocalFileLoader()
let context = try WITTool.deriveSemanticsContext(path: path, loader: loader)
let diagnostics = try context.validate(package: context.rootPackage)
for (fileName, diagnostics) in diagnostics {
let sourceContent = try loader.contentsOfWITFile(at: fileName)
for diagnostic in diagnostics {
guard let (line, column) = diagnostic.location(sourceContent) else {
print("\(fileName): error: \(diagnostic.message)")
continue
}
print("\(fileName):\(line):\(column): error: \(diagnostic.message)")
}
}
}
}
struct GenerateOverlay: ParsableCommand {
static let configuration = CommandConfiguration(
abstract: "Generate a Swift overlay from a WIT package"
)
enum Target: String, ExpressibleByArgument {
case guest
case host
}
@Option
var target: Target
@Argument
var path: String
@Option(name: .shortAndLong)
var output: String = "-"
func run() throws {
let loader = LocalFileLoader()
let context = try WITTool.deriveSemanticsContext(path: path, loader: loader)
let contents: String
switch target {
case .guest:
contents = try WITOverlayGenerator.generateGuest(context: context)
case .host:
contents = try WITOverlayGenerator.generateHost(context: context)
}
if output == "-" {
print(contents)
} else {
try FileManager.default.createDirectory(
at: URL(fileURLWithPath: output).deletingLastPathComponent(),
withIntermediateDirectories: true
)
try contents.write(toFile: output, atomically: true, encoding: .utf8)
}
}
}
struct ExtractWIT: ParsableCommand {
static let configuration = CommandConfiguration(
commandName: "extract-wit"
)
@Option(name: .customLong("swift-api-digester"))
var digesterPath: String
@Option
var moduleName: String
@Option
var namespace: String = "swift"
@Option
var packageName: String
@Option
var witOutputPath: String
@Option
var swiftOutputPath: String
@Argument(parsing: .captureForPassthrough)
var digesterArgs: [String] = []
func run() throws {
let extractor = WITExtractor(
namespace: namespace,
packageName: packageName,
digesterPath: digesterPath,
extraDigesterArguments: digesterArgs
)
let output = try extractor.run(moduleName: moduleName)
try output.witContents.write(toFile: witOutputPath, atomically: true, encoding: .utf8)
for diagnostic in extractor.diagnostics {
try FileHandle.standardError.write(contentsOf: Data((diagnostic.description + "\n").utf8))
}
// Generate overlay shim to export extracted WIT interface
do {
let sourceFile = try SourceFileSyntax.parse(
output.witContents,
fileName: "<extracted>.wit"
)
let packageResolver = PackageResolver()
let packageUnit = try packageResolver.register(packageSources: [sourceFile])
let context = SemanticsContext(rootPackage: packageUnit, packageResolver: packageResolver)
let (interface, _) = try context.lookupInterface(name: output.interfaceName, contextPackage: packageUnit)
let swiftSource = try generateGuestExportInterface(
context: context,
sourceFile: sourceFile,
interface: interface,
sourceSummaryProvider: SwiftSourceSummaryProvider(
summary: output.sourceSummary,
typeMapping: output.typeMapping
)
)
try swiftSource.write(toFile: swiftOutputPath, atomically: true, encoding: .utf8)
}
}
private func writeFile(_ filePath: String, contents: String) throws {
try contents.write(toFile: filePath, atomically: true, encoding: .utf8)
}
}
struct SwiftSourceSummaryProvider: SourceSummaryProvider {
let summary: SwiftSourceSummary
let typeMapping: (String) -> String?
func enumCaseNames(byWITName witName: String) -> [String]? {
guard case let .enumType(enumType) = summary.lookupType(byWITName: witName) else {
return nil
}
return enumType.cases.map(\.name)
}
public func qualifiedSwiftTypeName(byWITName witName: String) -> String? {
typeMapping(witName)
}
}
|
