feat: add swift support

Dockerfile

@@ -2,6 +2,31 @@ FROM openjdk:15-buster
 
 RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates ssh bash
 
+RUN apt-get -y install libncurses5 clang libcurl4 libpython2.7 libpython2.7-dev
+
+RUN apt-get -y install libxml2
+
+RUN \
+	curl https://download.swift.org/swift-5.9.2-release/ubuntu1804/swift-5.9.2-RELEASE/swift-5.9.2-RELEASE-ubuntu18.04.tar.gz -o swift.tar.gz &&\
+	tar xzf swift.tar.gz && \
+	mv swift-5.9.2-RELEASE-ubuntu18.04 /usr/share/swift && \
+	export PATH=/usr/share/swift/usr/bin:$PATH && \
+	swift -v 
+
+ENV PATH /usr/share/swift/usr/bin:$PATH
+
+RUN git clone https://github.com/apple/swift-openapi-generator.git \
+&& cd swift-openapi-generator \
+&& swift build \
+&& ln -s .build/debug/swift-openapi-generator /usr/local/bin/swift-openapi-generator \
+&& swift-openapi-generator --help
+
+RUN git clone https://github.com/Homebrew/brew ~/.linuxbrew/Homebrew \
+&& mkdir ~/.linuxbrew/bin \
+&& ln -s ../Homebrew/bin/brew ~/.linuxbrew/bin \
+&& eval $(~/.linuxbrew/bin/brew shellenv) \
+&& brew --version
+
 ENV GOLANG_VERSION 1.17
 
 RUN set -eux; \

contrib/clients/swift/CustomDateTranscoder.swift

@@ -0,0 +1,26 @@
+import Foundation
+import OpenAPIRuntime
+
+/// A transcoder for dates encoded as an ISO-8601 string (in RFC 3339 format). Allows date with internet date time and fractional seconds.
+public struct CustomDateTranscoder: DateTranscoder, @unchecked Sendable {
+
+    /// Creates and returns an ISO 8601 formatted string representation of the specified date.
+    public func encode(_ date: Date) throws -> String { 
+        let formatter = ISO8601DateFormatter()
+        formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+        return formatter.string(from: date) }
+
+    /// Creates and returns a date object from the specified ISO 8601 formatted string representation.
+    public func decode(_ dateString: String) throws -> Date {
+        let formatter = ISO8601DateFormatter()
+        formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+        print(dateString)
+        guard let date = formatter.date(from: dateString) else {
+            throw DecodingError.dataCorrupted(
+                .init(codingPath: [], debugDescription: "Expected date string to be ISO8601-formatted.")
+            )
+        }
+        return date
+    }
+}
+