Fix Swift header script to work with multiple URLs.

Author: jonsimantov

.github/workflows/update-dependencies.yml

@@ -127,21 +127,29 @@ jobs:
             core_version=$(grep "pod 'Firebase/Core'" ios_pod/Podfile | sed "s/.*'\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)'.*/\1/")
             echo "Getting Swift header files from Firebase iOS SDK ${core_version} zip distribution"
             ziptmp="$(mktemp -d)"
-            curl -H 'Authorization: token ${{ github.token }}' "https://github.com/firebase/firebase-ios-sdk/releases/download/v${core_version}/Firebase.zip" -o "${ziptmp}/Firebase.zip"
+            # The version might be named vX.Y.Z or simply X.Y.Z, check which exists.
+            declare -a zip_urls
+            zip_urls=("https://github.com/firebase/firebase-ios-sdk/releases/download/v${core_version}/Firebase.zip" "https://github.com/firebase/firebase-ios-sdk/releases/download/${core_version}/Firebase.zip")
+            for try_url in ${zip_urls[@]} error; do
+              curl -H 'Authorization: token ${{ github.token }}' -L -f "${try_url}" -o "${ziptmp}/Firebase.zip" 2> /dev/null && break
+            done
+            if [[ "${try_url}" == "error" ]]; then
+              echo "::error ::Could not download Firebase iOS prebuilt zip file."
+            fi
             cd "${ziptmp}"
             echo "Unzipping..."
             unzip -q Firebase.zip '*-Swift.h'
             cd -
             # Copy all *-Swift.h header files into ios_pod/swift_headers/
-            echo Copying headers..."
+            echo "Copying headers..."
             find "${ziptmp}" -name '*-Swift.h' -print0 | xargs -0 -n 1 -J REPLACETEXT cp -f REPLACETEXT ios_pod/swift_headers/
             copyright_line="// Copyright $(date +%Y) Google LLC"
             # Add a note to each file about its source.
             for ios_header in ios_pod/swift_headers/*.h; do
               if ! grep -q "^// Copied from Firebase iOS SDK" "${ios_header}"; then
                 sed -i~ "s|^// Generated by Apple Swift|${copyright_line}\n// Copied from Firebase iOS SDK ${core_version}.\n\n// Generated by Apple Swift|" "${ios_header}"
               fi
-              python scripts/format_code.py --f "${ios_header}"
+              python3 scripts/format_code.py --f "${ios_header}"
             done
             rm -rf ${ziptmp}