JDK index

cjdk currently depends on the JDK index assembled (in an automated fashion) by the Coursier project.

The index is used to map JDK vendors and versions to download URLs.

You can tell cjdk to use an alternative index (which must have the same JSON format) by setting the environment variable CJDK_INDEX_URL or by specifying the API keyword argument index_url= or the command line option --index-url.

A local copy of the index is stored in the cache directory, and a fresh copy is fetched if it is more than a day old. In other words, the time-to-live of the cached index is 1 day (86400 seconds). The TTL can be overridden by setting the environment varialbe CJDK_INDEX_TTL or by specifying the API keyword argument index_ttl= or the command line option --index-ttl.

index_ttl=0 or --index-ttl=0 will cause the index to be freshly downloaded unconditionally.