Fix Extensions (#565)

Co-authored-by: Filip Troníček <filip@gitpod.io>
Co-authored-by: Filip Troníček <filip.tronicek@seznam.cz>

.github/workflows/validate-pr.yml

@@ -17,12 +17,11 @@ jobs:
       - uses: actions/setup-node@v3.1.1
         with:
           node-version: "14.x"
-      - run: npm i
-      - run: npm i -g vsce
+      - run: npm install
+      - run: npm install --global vsce
       - uses: actions/setup-python@v3
         with:
           python-version: "3.8"
-      - run: npm install
       - run: EXTENSIONS=$(node diff-extensions) node publish-extensions
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -78,4 +78,16 @@ If a `custom` property is provided, then every command from the array is execute
 
 See all `ovsx` CLI options [here](https://github.com/eclipse/openvsx/blob/master/cli/README.md).
 
+## Environment Variables
+Custom commands such as `prepublish` and the ones inside the `custom`-array receive a few environment variables
+in order to perform advanced tasks such as executing operations based on the extension version.
+
+Following environment variables are available:
+  - `EXTENSION_ID`: the extension ID, e.g. `rebornix.ruby`
+  - `EXTENSION_PUBLISHER`: the extension publisher, e.g. `rebornix`
+  - `EXTENSION_NAME`: the extension name, e.g. `ruby`
+  - `VERSION`: the version of the extension to publish, e.g. `0.1.0`
+  - `MS_VERSION`: the latest version of the extension on MS marketplace, e.g. `0.1.0`
+  - `OVSX_VERSION`: the latest version of the extension on Open VSX, e.g. `0.1.0`
+
 [publish-extensions-job]: https://github.com/open-vsx/publish-extensions/blob/master/.github/workflows/publish-extensions.yml