I thought I would just create a tracking issue in case others are interested. I think that this can also serve as an easy communication point as I'm working through the various libraries.

Known Items to Handle

• bump swift-log dependency for Windows support (Update swift-log dependency #248 )
• bump swift-argument-parser dependency in SwiftSyntaxHighlighter for Windows (build: bump swift-argument-parser to 0.3.2 NSHipster/SwiftSyntaxHighlighter#14 )
• add support for Swift 5.4, 5.5 to SwiftSyntaxHighlighter (Add version-specific manifests for Swift 5.4 and 5.5 NSHipster/SwiftSyntaxHighlighter#15 )
• update SwiftSemantics for Swift 5.4+ (SwiftSemantics: update keyword SwiftSemantics#12 )
• fix #import usage in libxml2 module handling in Markup (Update libxml2-markup.h Markup#2 )
• handle CLong to Int conversion in Markup (Update Node.swift Markup#3 )
• silence warning from pkg-config handling in Markup (Update Package.swift Markup#4 )
• bump SwiftSyntaxHighlighter dependency in swift-doc for Windows support (Add support for Swift 5.4 / Xcode 12.5 #252 )
• bump SwiftSemantics dependency in swift-doc for Windows support (Add support for Swift 5.4 / Xcode 12.5 #252 )
• repair the Windows build of Markup (build: repair the clean build on Windows Markup#5 )
• silence warning from pkg-config handling in GraphViz (build: silence an annoying warning on Windows GraphViz#20 )
• handle libxml2 linkage across platforms for Markup (Modules: repair libxml2 link on Windows Markup#6 )
• bump swift-log dependency in swift-doc (Update swift-log dependency #248 )
• fix Foundation usage for Windows in swift-doc (swift-doc: load FoundationNetworking whenever possible #265 )
• bump swift-argument-parser dependency in swift-doc for Windows support (build: bump swift-argument-parser dependency #259 )
• build GraphViz for Windows
  • fix gvToolTred export (https://gitlab.com/graphviz/graphviz/-/merge_requests/1925)
  • handle modular build issue with GraphViz and WinSDK module (https://gitlab.com/graphviz/graphviz/-/merge_requests/1930)
• add Windows CI coverage for CommonMark (CI: add Windows coverage CommonMark#32 )
• add Windows CI coverage for SwiftMarkup (CI: add Windows coverage SwiftMarkup#14 )
• add Windows CI coverage for Markup (CI: add CI job for Windows Markup#8 )
• repair apple/swift-syntax 5.4 for Windows (build: use Foundation instead of C for getenv swiftlang/swift-syntax#283 )
• (削除) add easily accessible builds of GraphViz for Windows 🚧 (削除ここまで)
• track the 5.4 branch of swift-syntax in SwiftSemantics for Windows support (Update Package@swift-5.4.swift SwiftSemantics#16 )
• bump Markup dependency in swift-doc for Windows support (build: bump Markup to 0.1.2 #268 )
• add Windows CI coverage for GraphViz (CI: add Windows test coverage GraphViz#24 )
• re-enable transitive reduction support in GraphViz (Revert "Conditionally compile call to gvToolTred on Windows" GraphViz#25 )
• add Windows CI coverage for SwiftSemantics (CI: add Windows CI SwiftSemantics#15 )
• bump GraphViz dependency in swift-doc for Windows support (build: bump GraphViz dependency to 0.4.1 #274 )
• handle invalid file name generation with swift-doc (: is not portable) (perform some path sanitization over the generated names #258 )
• get prebuilt binaries for Windows
• fix dependency resolution (Update Package@swift-5.5.swift #278 )
• add Windows CI coverage for swift-doc (Update ci.yml #279 )
• package swift-doc for Windows (build: add a GHA for packaging swift-doc on Windows #280 )
• figure out GitHub actions handling for Windows packages