Speed up file modification checks
Summary: `getModificationTime` from the `directory` package is really
slow. The `unix` package is faster but still slow. This PR brings the
time spent checking file modifications (which is required on every
change) from ~0.5s to ~0.15s.
* Move the hie-core demo files around (they aren't really a demo anymore)
* Split the command line parsing into a separate module
* Give messages about how long starting something takes
* Make the interactive mode say what it is doing a bit more
* Add a --cwd flag to hie-core
* Take a list of files and directories for hie-core
* Update the readme to say how to test using hie-core
* Fix up the bazel file
* Add HLint exception
My primary goal is to avoid confusion when starting to support DAML-LF's
enum types. I also think these types were never particularly useful,
although I introduced them myself...
* Move the span related functionality to one place
* Fuse docHeaders away
* Decouple AtPoint from the rest of the rule database, simplifying the dependencies
* Move the import related functionality to one place
* Move all the closely tied to GHC modules together
* Rename the Logger module
* Push the other module renames through the code base
* Rename Development.IDE.State to Development.IDE.Core
* Rename Functions.Compile to Core.Compile
* Fix up some module names
* Cut down on non-sensicle exports
* Don't worry about setting source - no one uses it
* Reorder the module header
* Give more sensible names to the diagnostic creating functions
* Use more appropriate diagnostic functions
* Simplify the internal diagnostic creations
* Rewrite the diagnostics to go direct, not via GHC error types
* Remove redundant dflags from some functions
* Make sure the warning vs error distinction remains
* Remove unnecessary extensions
* Make atPoint generate either haskell or daml syntax, depending on options
* Get rid of data HoverText
* Move VirtualResource out from hie-core
* Rename hie-core to the right name
* Drop Types.LSP, merge it into LSP.Protocol
* Remove orphans that aren't actually used in our code
* Delete redundant newlines
* Add a defaultIdeOptions function
* Move ideTryIOException over to its one user
* Delete unused exports
* Delete the ProjectDiagnostic newtype - the type index was always Key
* Don't reexport position information from Diagnostic
* Delete the unused bits from Location
* Delete unused stuff from getSrcSpan
* Move URL stuff into Location from Diagnostic
* Remove unnecessary CPP
* Remove unnecessary extension
* Change from stage being polymorphic to being a Text
* Fix up the test suite too
* Push the cleanup to the edges
* More dependencies
* Patch up the tests now they need to find the type signature inside a ```daml block
* Rename the #ifdef for GHC_STABLE
* More CPP required for GHC stable
* Add a compatibility wrapper for HIE functionality which is new in GHC HEAD
* HLint ignores
* Finish the dummy implementations
* Add a bazel build for the ide-core library against GHC
* I have no idea now LPat and Pat previously managed to unify...
* Avoid using unRealSrcSpan as its only introduced for GHC 8.8
* Add some CPP to permit compiling with GHC 8.6
* Permit CPP in one more place
* Add two failing getDispatchEnv tests.
* Fix getDispatchEnv idempotency.
* Fix new test formatting.
* Make getDamlAssistantPath look in env first.
* Fix daml env var overriding.
* Test all the Nothing cases of env var dispatching.
* Fix dispatchEnv and getDamlEnv for Nothings.
* Add hlint rule to avoid future setEnv debacles.
* Fix other uses of setEnv.
* Fix type error.
* Fix reviewer comments
* setEnv comment
* Delete an entirely unused module
* Delete an entirely unused module
* Switch the compiler to use EUnit over mkEUnit
* Delete an unused module
* Whitespace only
* Clean up the API for World, don't expose the internals, better creation functions
* Clean up the type checker environment, don't expose the internals of Gamma, add a few helper functions
* Delete unused functions
* Explicit module export lists
* Fix the nub replacement hints
* Turn on the warning that we require module export lists
* Add an explicit export list
