Prepare for JuliaRegistry (#1106)

Add Tagbot and Compathelper to github workflows

.github/workflows/CompatHelper.yml

@@ -0,0 +1,45 @@
+name: CompatHelper
+on:
+  schedule:
+    - cron: 0 0 * * *
+  workflow_dispatch:
+permissions:
+  contents: write
+  pull-requests: write
+jobs:
+  CompatHelper:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if Julia is already available in the PATH
+        id: julia_in_path
+        run: which julia
+        continue-on-error: true
+      - name: Install Julia, but only if it is not already available in the PATH
+        uses: julia-actions/setup-julia@v2
+        with:
+          version: '1'
+          arch: ${{ runner.arch }}
+        if: steps.julia_in_path.outcome != 'success'
+      - name: "Add the General registry via Git"
+        run: |
+          import Pkg
+          ENV["JULIA_PKG_SERVER"] = ""
+          Pkg.Registry.add("General")
+        shell: julia --color=yes {0}
+      - name: "Install CompatHelper"
+        run: |
+          import Pkg
+          name = "CompatHelper"
+          uuid = "aa819f21-2bde-4658-8897-bab36330d9b7"
+          version = "3"
+          Pkg.add(; name, uuid, version)
+        shell: julia --color=yes {0}
+      - name: "Run CompatHelper"
+        run: |
+          import CompatHelper
+          CompatHelper.main()
+        shell: julia --color=yes {0}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
+          # COMPATHELPER_PRIV: ${{ secrets.COMPATHELPER_PRIV }}

.github/workflows/TagBot.yml

@@ -0,0 +1,31 @@
+name: TagBot
+on:
+    issue_comment:
+        types:
+            - created
+    workflow_dispatch:
+        inputs:
+            lookback:
+                default: "3"
+permissions:
+    actions: read
+    checks: read
+    contents: write
+    deployments: read
+    issues: read
+    discussions: read
+    packages: read
+    pages: read
+    pull-requests: read
+    repository-projects: read
+    security-events: read
+    statuses: read
+jobs:
+    TagBot:
+        if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
+        runs-on: ubuntu-latest
+        steps:
+            - uses: JuliaRegistries/TagBot@v1
+              with:
+                  token: ${{ secrets.GITHUB_TOKEN }}
+                  ssh: ${{ secrets.DOCUMENTER_KEY }}