Strip PWD

.github/workflows/swiftlint.yml

@@ -10,6 +10,12 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: Lint
+        # based on https://github.com/norio-nomura/action-swiftlint
         run: |
+          function stripPWD() {
+            ! ${WORKING_DIRECTORY+false} && cd - > /dev/null
+            sed -E "s/$(pwd|sed 's/\//\\\//g')\///"
+          }
           swiftlint | \
+            stripPWD | \
             sed -E 's/^(.*):([0-9]+):([0-9]+): (warning|error|[^:]+): (.*)/::\4 file=\1,line=\2,col=\3::\5/'