Update sync script to support Cloudflare R2 and CDN cache purging

[marcocastignoli]

Instructions to test the script

The script will delete the .git folder, so before proceeding

tmpdir=$(mktemp -d) && cd "$tmpdir"
cp /Users/marcocastignoli/Projects/solc-bin/sync-r2.sh .
git init
echo "hello r2" > nightly-build.txt
git add sync-r2.sh nightly-build.txt
git commit -m "Test payload for R2 sync"

Then set the environment variables

export R2_ACCOUNT_ID=
export R2_ZONE=
export R2_BUCKET_NAME=
export CLOUDFLARE_ZONE_ID=
export CLOUDFLARE_CACHE_HOST=
export CLOUDFLARE_API_TOKEN=
export AWS_ACCESS_KEY_ID=
export AWS_SECRET_ACCESS_KEY=
export AWS_DEFAULT_REGION=

Finally run the script

./sync-r2.sh "$R2_ACCOUNT_ID" "$R2_ZONE" "$R2_BUCKET_NAME" "$CLOUDFLARE_ZONE_ID" "$CLOUDFLARE_CACHE_HOST" "$CLOUDFLARE_API_TOKEN"

[marcocastignoli]

I tested the script locally with some dummy files and it's working. Soon @clonker will run the script with a local copy he has of the full repository.

[r0qs]

Nice. Thanks a lot for that @marcocastignoli! It looks good to me. Just a small comment.

[nikola-matic]

I assume the trailing comma at the end of purge_payload will not cause problems?

[marcocastignoli]

it's not at the end, it's at the beginning. the separator is "" for the first one (prefix) and then , "others"