Merge pull request rust-lang#1870 from Kobzol/rustc-pull-ci

Add rustc-pull CI automation workflow

Author: Amanieu

stdarch/.github/workflows/rustc-pull.yml

@@ -0,0 +1,22 @@
+# Perform a subtree sync (pull) using the josh-sync tool once every few days (or on demand).
+name: rustc-pull
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Run at 04:00 UTC every Monday and Thursday
+    - cron: '0 4 * * 1,4'
+
+jobs:
+  pull:
+    if: github.repository == 'rust-lang/stdarch'
+    uses: rust-lang/josh-sync/.github/workflows/rustc-pull.yml@main
+    with:
+      # https://rust-lang.zulipchat.com/#narrow/channel/208962-t-libs.2Fstdarch/topic/Subtree.20sync.20automation/with/528461782
+      zulip-stream-id: 208962
+      zulip-bot-email:  "stdarch-ci-bot@rust-lang.zulipchat.com"
+      pr-base-branch: master
+      branch-name: rustc-pull
+    secrets:
+      zulip-api-token: ${{ secrets.ZULIP_API_TOKEN }}
+      token: ${{ secrets.GITHUB_TOKEN }}