Fix expectations for tests
implement as Location and use URI internally
Switch IntegrityCheck encoding to multihash
Split IntegrityCheck and NoIntegrityCheck
Not using hexdigest in the constructor anymore
Caches implemented in this commit:
StandardFileCache - cache conforming to dhall-lang
RamCache - stores in a hash, meant for single-load caching
NoCache - when you want to be sure
Default max import depth of 50
So even without a timeout, there is a limit on bonkers cases.
Standard resolver defaults to INIFINTY since the standard does not
define a depth limit.
Parse expression from ENV var import
Instead of the path-only support from before.
Allow imports to be either binary or source form
Anything we'll eventually run is a skip
Fix test to new binary format
No more null fragment
Implement integrity checks
Support headers for HTTP import
Every AST node uses as_json to express the generic structure for
encoding itself. Expression aliases as_cbor to as_json by default and
then uses as_cbor in to_cbor (aliased as to_binary).
This design is because we need to override the encoding of Double for
CBOR, but want to keep the normal Float value for as_json in case that
is used directly (to avoid surprising the user).
If trying to import from IPFS, fallback to gateway
First pass at import resolution