Allow for a control issue to let us know when CI's failing (#86)

* Allow for a control issue to let us know when CI's failing

* Act on self-review: simplify review

.github/workflows/up_ex_doc_version.yml

@@ -11,22 +11,29 @@ jobs:
     name: Update ex_doc version
     runs-on: ubuntu-latest
     strategy:
+    strategy:
+      max-parallel: 1
       matrix:
-        pair:
+        triplet:
           - otp: '24'
             elixir: '1.13'
+            rebar3: '3.22'
           - otp: '25'
             elixir: '1.14'
+            rebar3: '3.22'
           - otp: '26'
             elixir: '1.15'
+            rebar3: '3.22'
           - otp: '27.0-rc1'
             elixir: '1.16'
+            rebar3: '3.22'
     steps:
       - uses: actions/checkout@v4
       - uses: erlef/setup-beam@v1
         with:
-          otp-version: ${{matrix.pair.otp}}
-          elixir-version: ${{matrix.pair.elixir}}
+          otp-version: ${{matrix.triplet.otp}}
+          elixir-version: ${{matrix.triplet.elixir}}
+          rebar3-version: ${{matrix.triplet.rebar3}}
       - run: |
             CURR=$(curl -s https://hex.pm/api/packages/ex_doc | jq -r '.latest_stable_version')
             TITLE="[automation] Update \`ex_doc\` to ${CURR}"
@@ -56,17 +63,28 @@ jobs:
               mix deps.unlock ex_doc
               mix deps.get
 
-              if ! git diff --exit-code 1> /dev/null ; then
-                  echo "There's stuff to push. Creating a pull request..."
-                  git add .
-                  git commit -m "${TITLE}"
-                  git push origin "$BRANCH"
-
-                  gh pr create --fill \
-                      --title "${TITLE}" \
-                      --body "This is an automated action to update \`ex_doc\` to version ${CURR}"
+              set +e
+              rebar3 do dialyzer, ct
+              UP_EX_DOC_VERSION_CONTROL_ISSUE=85
+              if [ $? -ne 0 ]; then
+                gh issue reopen "${UP_EX_DOC_VERSION_CONTROL_ISSUE}" || true
+                gh issue edit "${UP_EX_DOC_VERSION_CONTROL_ISSUE}" -t "[automation] Workflow \`up_ex_doc_version\` failed" -b "Something's wrong with workflow \`up_ex_doc_version\`. Check [this](/${GITHUB_REPOSITORY}/actions/workflows/up_ex_doc_version.yml)."
+                exit 1
               else
-                  echo "Nothing to push. Is \`ex_doc\` already at version ${CURR}?"
+                set -e
+                gh issue close "${UP_EX_DOC_VERSION_CONTROL_ISSUE}" || true
+                if ! git diff --exit-code 1> /dev/null ; then
+                    echo "There's stuff to push. Creating a pull request..."
+                    git add .
+                    git commit -m "${TITLE}"
+                    git push origin "$BRANCH"
+
+                    gh pr create --fill \
+                        --title "${TITLE}" \
+                        --body "This is an automated action to update \`ex_doc\` to version ${CURR}"
+                else
+                    echo "Nothing to push. Is \`ex_doc\` already at version ${CURR}?"
+                fi
               fi
             else
               echo "  ... found! Bailing out..."