align ourselves with Swift 6.0 as much as possible in this phase

Author: tayloraswift

.github/workflows/docs.yml

@@ -16,16 +16,15 @@ jobs:
         env:
             UNIDOC_ENABLE_INDEXSTORE: "0"
         steps:
-            #   Important! We install an Ubuntu 22.04 Swift toolchain, and not the 24.04 one
-            #   because the 24.04 toolchain for some reason is built with assertions enabled,
-            #   which causes the Swift compiler to crash when building the package.
             -   name: Install Swift
                 uses: tayloraswift/swift-install-action@master
                 with:
-                    swift-prefix: "swift-5.10.1-release/ubuntu2204/swift-5.10.1-RELEASE"
-                    swift-id: "swift-5.10.1-RELEASE-ubuntu22.04"
+                    swift-prefix: "swift-6.0-release/ubuntu2404/swift-6.0-RELEASE"
+                    swift-id: "swift-6.0-RELEASE-ubuntu24.04"
 
             #   This installs an older version of Unidoc, not the one we are testing.
+            #   We use `--static-swift-stdlib` so it doesn’t matter if the Unidoc binary was
+            #   built with a different version of Swift.
             -   name: Install Unidoc
                 uses: tayloraswift/swift-unidoc-action@master
 
@@ -44,9 +43,14 @@ jobs:
         name: macOS
         env:
             UNIDOC_ENABLE_INDEXSTORE: "0"
-            DEVELOPER_DIR: "/Applications/Xcode_15.3.app/Contents/Developer"
 
         steps:
+            -   name: Install Swift 6.0
+                uses: tayloraswift/swift-install-action@master
+                with:
+                    swift-prefix: "swift-6.0-release/xcode/swift-6.0-RELEASE"
+                    swift-id: "swift-6.0-RELEASE"
+
             -   name: Install Unidoc
                 uses: tayloraswift/swift-unidoc-action@master
 

README.md

@@ -21,12 +21,7 @@ Unidoc powers the [Swiftinit](https://swiftinit.org) open source package index!
 
 ## Requirements
 
-Unidoc’s principal deployment target is Amazon Linux 2023, but the project also builds on macOS 14 with Xcode 15.3 or newer.
-
-Unidoc requires Swift 5.10.
-
->   Note:
-    Due to a known [compiler bug](https://github.com/apple/swift/issues/71606), it is not currently possible to build Unidoc on macOS with a non-Xcode toolchain.
+Unidoc supports Linux and macOS. Unidoc requires Swift 6.0.
 
 
 ## Features