Improve install behavior on Windows

Installing the grammar from `build/grammar.js` works for normal install
commands but leaves the user unable to run `tree-sitter` commands from
the current directory. That's because specifying a `grammar.js` path
causes the CLI to skip writing a `grammar.json` (which is debatably a
bug in the CLI). Other scripts currently work around this by running
`tree-sitter generate` themselves, relying on a symlink into the build
directory. That doesn't work on Windows, though.

This changes the install script so that it copies the `grammar.js` into
the current directory and then uses the copied one. With this change, we
get our `grammar.json` simply by running `npm install`!

.github/workflows/check.yml

@@ -26,9 +26,15 @@ jobs:
  with:
  node-version: ${{ matrix.node-version }}
  cache: 'npm'
+ - uses: actions-rs/toolchain@v1
+ with:
+ toolchain: stable
+ override: true
  - run: npm install
  - run: npm run ci
  - run: npm run test-ci
+ - run: cargo test
+ - run: cd ./test-npm-package && npm test; cd ..
  - name: Publish parser source
  uses: actions/upload-artifact@v2
  with:

.gitignore

@@ -6,3 +6,4 @@ node_modules
 /test
 Cargo.lock
 /target/*
+/grammar.js

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "tree-sitter-swift"
 description = "swift grammar for the tree-sitter parsing library"
-version = "0.1.0"
+version = "0.1.1"
 keywords = ["incremental", "parsing", "swift"]
 categories = ["parsing", "text-editors"]
 repository = "https:/alex-pinkus/tree-sitter-swift"

README.md

@@ -15,7 +15,7 @@ To use this parser to parse Swift code, you'll want to depend on either the Rust
 To use the Rust crate, you'll add this to your `Cargo.toml`:
 ```
 tree-sitter = "0.20.0"
-tree-sitter-swift = "=0.1.0"
+tree-sitter-swift = "=0.1.1"
 ```
 
 Then you can use a `tree-sitter` parser with the language declared here:
@@ -35,7 +35,7 @@ let tree = parser.parse(&my_source_code, None)
 To use this from NPM, you'll add similar dependencies to `package.json`:
 ```
 "dependencies: {
- "tree-sitter-swift": "0.1.0",
+ "tree-sitter-swift": "0.1.1",
  "tree-sitter": "^0.20.0"
 }
 ```

grammar.js

@@ -0,0 +1,5 @@
+// This file exists to flag to the `tree-sitter` CLI that we are a proper grammar directory, to work
+// around some inflexibility in the CLI. However, it will get replaced at install-time with totally
+// different contents. Do not check in these changes!
+
+// You can ignore this file's changes using `git update-index --skip-worktree grammar.js`.