GitHub actions (#1744)

* Add GitHub actions

* Workflow typo

* Workflow typo

* Use GITHUB_TOKEN in build if available

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+on:
+  pull_request:
+  push:
+
+jobs:
+  default:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: iffy/install-nim@v3
+        with:
+          version: stable
+      - run: nim c -d:ssl -r package_scanner.nim
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - run: node ./validate_json.js

package_scanner.nim

@@ -54,12 +54,16 @@ proc canFetchNimbleRepository(name: string, urlJson: JsonNode): bool =
   #       nimble file in it
   result = true
   var url: string
+  var client = newHttpClient(timeout=100000)
+  defer: client.close()
 
   if not urlJson.isNil:
     url = urlJson.str
-
+    if url.startsWith("https://github.com"):
+      if existsEnv("GITHUB_TOKEN"):
+        client.headers = newHttpHeaders({"authorization": "Bearer " & getEnv("GITHUB_TOKEN")})
     try:
-      discard getContent(url, timeout=10000)
+      discard client.getContent(url)
     except HttpRequestError, TimeoutError:
       echo "W: ", name, ": unable to fetch repo ", url, " ",
            getCurrentExceptionMsg()