[tinou98]

This allows to programmatically (with script) wait for elements to be ready, instead of hardcoding a duration.

Scripts examples

Warm-up:

KEY="data/${1:0:2}/$1";
if [ "$(aws s3api head-object --bucket cold --key "$KEY" --query StorageClass)" == '"GLACIER"' ]
then
    aws s3api restore-object --restore-request Days=7 --bucket cold --key "$KEY"
fi

Warm-up wait:

KEY="data/${1:0:2}/$1";
until [ "$(aws s3api head-object --bucket cold --key "$KEY" --query StorageClass)" != '"GLACIER"' ]
do
    sleep 60s
done

This is a simple version that will wait for each object sequentially (but that shouldn't be a problem as all warm up request are done in a first pass, and thus runs in parallel).

I'm up for discussion if another model looks good, like

• moving the loop in the lib, and the wait script just check if the file is ready
• having only one script, that warm-up and then return the status