Add swift v1.22.0 with updated patch

plugins/apple/swift/v1.22.0/.dockerignore

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

plugins/apple/swift/v1.22.0/Dockerfile

@@ -0,0 +1,14 @@
+# syntax=docker/dockerfile:1.4
+FROM swift:5.8.1-focal AS build
+
+COPY extramoduleimports.patch /app/extramoduleimports.patch
+WORKDIR /app
+RUN git clone --depth 1 --branch 1.22.0 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-debian11
+COPY --from=build --link /app/swift-protobuf/.build/release/protoc-gen-swift .
+USER nobody
+ENTRYPOINT [ "/protoc-gen-swift" ]

plugins/apple/swift/v1.22.0/buf.plugin.yaml

@@ -0,0 +1,20 @@
+version: v1
+name: buf.build/apple/swift
+plugin_version: v1.22.0
+source_url: https://github.com/apple/swift-protobuf
+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: 1.22.0
+  opts:
+    - Visibility=Public
+    - FileNaming=PathToUnderscores
+spdx_license_id: Apache-2.0
+license_url: https://github.com/apple/swift-protobuf/blob/1.22.0/LICENSE.txt

plugins/apple/swift/v1.22.0/extramoduleimports.patch

@@ -0,0 +1,58 @@
+diff --git a/Sources/protoc-gen-swift/FileGenerator.swift b/Sources/protoc-gen-swift/FileGenerator.swift
+index 90fd06a6..93460574 100644
+--- a/Sources/protoc-gen-swift/FileGenerator.swift
++++ b/Sources/protoc-gen-swift/FileGenerator.swift
+@@ -121,6 +121,13 @@ class FileGenerator {
+                 p.print("\(visibilityAnnotation)import \(i)\n")
+             }
+         }
++        let neededCustomImports = generatorOptions.extraModuleImports
++        if !neededCustomImports.isEmpty {
++            p.print()
++            for i in neededCustomImports {
++                p.print("import \(i)\n")
++            }
++        }
+
+         p.print("\n")
+         generateVersionCheck(printer: &p)
+diff --git a/Sources/protoc-gen-swift/GeneratorOptions.swift b/Sources/protoc-gen-swift/GeneratorOptions.swift
+index 69ecdb86..e0f2e26e 100644
+--- a/Sources/protoc-gen-swift/GeneratorOptions.swift
++++ b/Sources/protoc-gen-swift/GeneratorOptions.swift
+@@ -50,6 +50,7 @@ class GeneratorOptions {
+   let protoToModuleMappings: ProtoFileToModuleMappings
+   let visibility: Visibility
+   let implementationOnlyImports: Bool
++  let extraModuleImports: [String]
+
+   /// A string snippet to insert for the visibility
+   let visibilitySourceSnippet: String
+@@ -60,6 +61,7 @@ class GeneratorOptions {
+     var visibility: Visibility = .internal
+     var swiftProtobufModuleName: String? = nil
+     var implementationOnlyImports: Bool = false
++    var externalModuleImports: [String] = []
+
+     for pair in parseParameter(string:parameter) {
+       switch pair.key {
+@@ -94,6 +96,12 @@ class GeneratorOptions {
+         if let value = Bool(pair.value) {
+           implementationOnlyImports = 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)
+       }
+@@ -122,5 +130,6 @@ class GeneratorOptions {
+     }
+
+     self.implementationOnlyImports = implementationOnlyImports
++    self.extraModuleImports = externalModuleImports
+   }
+ }

tests/testdata/buf.build/apple/swift/v1.22.0/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:ffGsj903OkejaJHBJ9J0lmZkRiA58mar/OznBW1O9Wo=

tests/testdata/buf.build/apple/swift/v1.22.0/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:0b5iqMifZQ1mLRYdO83BFuNf3JagkBeYg5O++DTSFhE=