Use SourceKit's not_recommended field to populate deprecated in Code Completion responses

Add a version field to PublishDiagnostics, according to LSP 3.15

LSP Spec 3.15 will add a document version field for PublishDiagnostics.
Cherry-picking field int...

build: add CMake build system

Update the struct definitions to match version 3.14 of the LSP spec

Add textEdit to code completion responses

Upgrade CustomCodable to handle optional values using encodeIfPresent

Fix for very rare sourcekit-lsp crash.

The LSP spec requires us to omit keys for nil values rather than using
the JSON `null` constant ...

Support MarkedStrings in Hover responses

Add a product that contains the modules needed to build a generic LSP client

Fix typo: JSONRPCConnection should be spelled with two 'n'

Attempt to save index on shutdown

Not all editors send shutdown/exit messages, particularly when you quit
the application (as oppo...

If the client is well-behaved and sends a shutdown request, we close the
index in order to flush...

Since the connection and message handler have a reciprocal need to know
about each other, move t...

Add support for non-URL URIs

Similar to LSP, BSP also uses URI. We were handling this correctly
everywhere except one test th...

* Rename Extensions.swift
* Move import where it is used

URL can in fact store URIs, it just doesn't have a very nice API to
interact with them. As long ...

In the fallback build system use the URIs pseudo path to construct
compiler arguments. For non-f...

According to the LSP specification, arbitrary URIs can be used as
document identifiers. Instead ...

Reorganize the repository into a set of bare LSP modules and SourceKit modules

Ideally we can someday migrate this to something more standard such as
swift-log, and make it ex...

This is the only user of this code, and it's not particularly great.
Sink it to reduce dependenc...

We explicitly do not want to handle non-ascii unicode "numbers", etc.

It's not being used for anything interesting in LSP layers, so sink it
to minimize dependencies.

This isn't a particularly good implementation and it only has one user.
Move it down to reduce d...

We will be able to split the LSP modules off later. These LSP modules
will provide the ability t...

I think the closing parenthesis on the new line reads a lot nicer

Remove dependency of LanguageServerProtocol on SKSupport

Apart from removing unnecessary imports, the following changes were
performed:
- Move Cancellati...

Disable clangd indexing

Move LanguageServer to SKCore

Eliminate _IndirectConnection and replace it by closure

This allows us to move the semaphore logic out of the message to the connection where it belongs.

Add new platform for TSCUtility

The macOS smoke test for apple/swift-package-manager#2396 fails without this addition.

Fix issue preventing DocumentSymbols from working with clangd

- Clangd uses the HierarchicalDocumentSymbolSupport field of the
documentSymbol capabilities, ...

Project can be built using Python 3

Set index db path from build server response

Adds buildTarget/didChange notification to the build server protocol

Improve BuildServerBuildSystemTests error handling

Fix hang/crash when a write failure occurs

This code was doing a sync dispatch to a queue it was already running
on. Instead, go through th...

[test] Try to get more information if test fails

don't add log handler until connection has started

Refactor FoldingRangeTests to use SKTibsTestWorkspace

[tsan] Fix race on close in JSONRPCConnection

Remove the need to use `Connection` to talk to internal LSPs

Add buildTarget/sources and buildTarget/outputPaths

Change-Id: I505ed9a8561e81f22635a6e852b22654a737ad61

`SourceKitServer` now talks to the `SwiftLanguageServer` and
`ClangLanguageServerShim` directly ...

[refactoring] Disable "local rename"

[tsan] Fix a few issues caught by TSan

This needs similar support to global rename before it actually works.
Disable for now.

Add Local Refactoring

We don't need to check the message buffer in the middle of the test; it
suffices that we got the...