Add apple/swift v1.28.1 plugin

plugins/apple/swift/v1.28.1/.dockerignore

@@ -0,0 +1,3 @@
+*
+!Dockerfile
+!extramoduleimports.patch

plugins/apple/swift/v1.28.1/Dockerfile

@@ -0,0 +1,19 @@
+# syntax=docker/dockerfile:1.9
+FROM swift:5.10.1-bookworm AS build
+
+RUN apt-get update \
+ && apt-get install -y libstdc++-12-dev
+COPY --link extramoduleimports.patch /app/extramoduleimports.patch
+WORKDIR /app
+RUN git clone --depth 1 --branch 1.28.1 https://github.com/apple/swift-protobuf --recursive
+WORKDIR /app/swift-protobuf
+RUN git apply /app/extramoduleimports.patch
+RUN swift build -c release --static-swift-stdlib -Xlinker -s
+
+FROM gcr.io/distroless/cc-debian12:latest@sha256:3b75fdd33932d16e53a461277becf57c4f815c6cee5f6bc8f52457c095e004c8 AS base
+
+FROM scratch
+COPY --link --from=base / /
+COPY --link --from=build /app/swift-protobuf/.build/release/protoc-gen-swift .
+USER nobody
+ENTRYPOINT [ "/protoc-gen-swift" ]

plugins/apple/swift/v1.28.1/buf.plugin.yaml

@@ -0,0 +1,21 @@
+version: v1
+name: buf.build/apple/swift
+plugin_version: v1.28.1
+source_url: https://github.com/apple/swift-protobuf
+integration_guide_url: https://github.com/apple/swift-protobuf#getting-started
+description: Base types for Swift. Generates message and enum types.
+output_languages:
+ - swift
+registry:
+ swift:
+ deps:
+ - source: https://github.com/apple/swift-protobuf.git
+ package: swift-protobuf
+ swift_versions: [ ".v5" ]
+ products: [ SwiftProtobuf ]
+ version: 1.28.1
+ opts:
+ - Visibility=Public
+ - FileNaming=PathToUnderscores
+spdx_license_id: Apache-2.0
+license_url: https://github.com/apple/swift-protobuf/blob/1.28.1/LICENSE.txt

plugins/apple/swift/v1.28.1/extramoduleimports.patch

@@ -0,0 +1,60 @@
+diff --git a/Sources/protoc-gen-swift/FileGenerator.swift b/Sources/protoc-gen-swift/FileGenerator.swift
+index 6238fd10..e5d957da 100644
+--- a/Sources/protoc-gen-swift/FileGenerator.swift
++++ b/Sources/protoc-gen-swift/FileGenerator.swift
+@@ -133,6 +133,14 @@ class FileGenerator {
+ return
+ }
+
++ let neededCustomImports = generatorOptions.extraModuleImports
++ if !neededCustomImports.isEmpty {
++ p.print()
++ for i in neededCustomImports {
++ p.print("import \(i)\n")
++ }
++ }
++
+ p.print()
+ generateVersionCheck(printer: &p)
+
+diff --git a/Sources/protoc-gen-swift/GeneratorOptions.swift b/Sources/protoc-gen-swift/GeneratorOptions.swift
+index bf9d9cdb..653ea0f1 100644
+--- a/Sources/protoc-gen-swift/GeneratorOptions.swift
++++ b/Sources/protoc-gen-swift/GeneratorOptions.swift
+@@ -64,6 +64,7 @@ class GeneratorOptions {
+ }
+ }
+
++ let extraModuleImports: [String]
+ let outputNaming: OutputNaming
+ let protoToModuleMappings: ProtoFileToModuleMappings
+ let visibility: Visibility
+@@ -74,6 +75,7 @@ class GeneratorOptions {
+ let visibilitySourceSnippet: String
+
+ init(parameter: any CodeGeneratorParameter) throws {
++ var externalModuleImports: [String] = []
+ var outputNaming: OutputNaming = .fullPath
+ var moduleMapPath: String?
+ var visibility: Visibility = .internal
+@@ -138,6 +140,12 @@ class GeneratorOptions {
+ throw GenerationError.invalidParameterValue(name: pair.key,
+ value: pair.value)
+ }
++ case "ExtraModuleImports":
++ if !pair.value.isEmpty {
++ externalModuleImports.append(pair.value)
++ } else {
++ throw GenerationError.invalidParameterValue(name: pair.key, value: pair.value)
++ }
+ default:
+ throw GenerationError.unknownParameter(name: pair.key)
+ }
+@@ -167,6 +175,7 @@ class GeneratorOptions {
+ visibilitySourceSnippet = "package "
+ }
+
++ self.extraModuleImports = externalModuleImports
+ self.experimentalStripNonfunctionalCodegen = experimentalStripNonfunctionalCodegen
+
+ switch (implementationOnlyImports, useAccessLevelOnImports) {

tests/testdata/buf.build/apple/swift/v1.28.1/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:2V79rqozuiAEUtD1M8yNEC0x99wWa/swFpqQzak3InA=

tests/testdata/buf.build/apple/swift/v1.28.1/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:uoHRiWUJ7qWsF25fxHZTCCk/O+1mLNB1KbObPI6K/pw=