Previously, we `fatalError`ing when `JSONDecoder` failed to decode a message from the client. Instead of crashing, try recovering from such invalid messages as best as possible. If we know that the state might have gotten out of sync with the client, show a notification message to the user, asking them to file an issue.
rdar://112991102
Add `.swift-format` to the repo and format the repo with `swift-format`.
This commit does not add any automation to enforce formatting of sourcekit-lsp in CI. The goal of this commit is to get the majority of source changes out of the way so that the diff of actually enforcing formatting will have fewer changes or conflicts.
We will be able to split the LSP modules off later. These LSP modules
will provide the ability to write custom LSP servers and clients in
Swift. The sourcekit-lsp repository will build on top of this new
package to provide an LSP implementation that creates a language server
for Swift and C-based-languages.
We are tied to using a SwiftPM that matches the toolchain, so upgrade
from 0.3.0 to .branch("master") and add a pins file to manage updating
that dependency.
This was driven by changes that broke loading packages being developed
with newer version of SwiftPM when using the 0.3.0 tag of libSwiftPM.
However, the changes seem to work when going in the other direction, so
using the newer libSwiftPM hasn't caused any known regressions for using
older toolchain versions (not guarantteed and not tested extensively
though).
This fixes using the latest (November 13) toolchain snapshot on macOS.
On Linux there are other issues not specific to LSP.
