Add script for generating grammars.dat and setup CI (#2)

* Make script work in node.js. The function `generate()` now just returns the blob.

* Log which language is loading right now

* Add GitHub action script for build and publish grammars.dat as artifact

* Add Create Pull Request workflow

* Update README.md

Co-authored-by: Fela Ameghino <[email protected]>

Author: STmihan

Diff for: .github/workflows/build-grammars.yml

@@ -0,0 +1,28 @@
+name: Update grammars
+
+on: [ workflow_dispatch ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x]
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 18
+    - run: npm install
+    - run: npm start
+    - name: Upload a Build Artifact
+      uses: actions/[email protected]
+      with:
+        name: grammars.dat
+        path: ./libprisma/grammars.dat
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v5
+      with:
+        commit-message: Update grammars
+        title: Update grammars
+        branch: update-grammars

Diff for: .gitignore

@@ -35,6 +35,8 @@ bld/
 
 # Visual Studio 2015/2017 cache/options directory
 .vs/
+# Webstorm cache directory
+.idea/
 # Uncomment if you have tasks that create the project's static files in wwwroot
 #wwwroot/
 
@@ -360,4 +362,4 @@ MigrationBackup/
 .ionide/
 
 # Fody - auto-generated XML schema
-FodyWeavers.xsd
+FodyWeavers.xsd

Diff for: README.md

@@ -28,12 +28,12 @@ for (auto it = tokens.begin(); it != tokens.end(); ++it)
 ```
 
 ### How to update
-As mentioned, grammars dictionary is generated starting from prism.js source code.
-Currently, this is done manually by visiting prism's [test drive](https://prismjs.com/test.html).
-Once on the page, it is necessary to select all the languages, open the browser console and paste in both `isEqual.js` and `generate.js`.
-After a few seconds, the file `grammars.dat` will be downloaded.
-
-TODO: would be great to automate this step, or at least to make the script auto-execute rather to require all the user input.
+Run 
+```sh
+npm install
+npm start
+```
+The new version of `grammars.dat` will appear in the `libprisma/grammars.dat`.
 
 ### Supported languages
 | Language | Aliases |