ci: Update iOS derived data path, 'fix' docc command for Windows/Linux

Author: stackotter

.github/actions/compile-docs/action.yml

@@ -23,8 +23,11 @@ runs:
       run: |
         set -ex
         mkdir "$TARGET.doccarchive" && \
+        # We use --disable-sandbox instead of --allow-writing-to-directory because
+        # Linux and Windows throw tantrums about not being able to write to tmp (even
+        # though when I try locally I face no issues...)
         swift package \
-          --allow-writing-to-directory . \
+          --disable-sandbox \
           generate-documentation \
           --target "$TARGET" \
           --disable-indexing \
@@ -51,8 +54,8 @@ runs:
         fi
         echo "$DEVICE_TYPE"
         echo "Building documentation for destination '$destination'"
-        xcodebuild -skipMacroValidation -scheme "$TARGET" -destination "$destination" -derivedDataPath data docbuild | xcbeautify --renderer github-actions
-        cp -R "data/Build/Products/Debug/$TARGET.doccarchive" "$TARGET.doccarchive"
+        xcodebuild -skipMacroValidation -scheme "$TARGET" -destination "$destination" -derivedDataPath /tmp/data docbuild | xcbeautify --renderer github-actions
+        cp -R "/tmp/data/Build/Products/Debug/$TARGET.doccarchive" "$TARGET.doccarchive"
       shell: bash
       env:
         TARGET: ${{ inputs.target }}

.github/workflows/build-test-and-docs.yml

@@ -84,7 +84,8 @@ jobs:
           set -ex
           (
             buildtarget () {
-              xcodebuild -skipMacroValidation -scheme "$1" -destination "id=$deviceid" build | xcbeautify --renderer github-actions
+              # Use the same derived data path as DocC compilation so that we don't duplicate work.
+              xcodebuild -derivedDataPath /tmp/data -skipMacroValidation -scheme "$1" -destination "id=$deviceid" build | xcbeautify --renderer github-actions
             }
 
             buildtarget SwiftCrossUI