Check dependency updates automatically in CI (#43)

.github/workflows/check-deps.sh

@@ -0,0 +1,53 @@
+#!/bin/bash -e
+
+GITHUB_PR_LABEL="dependencies"
+COMMIT_TITLE="Update dependencies"
+
+if [ -z "$BRANCH_NAME" ]; then
+    echo "Branch name is required"
+    exit 1
+fi
+
+function check_pr {
+    gh pr list --state open --label "$GITHUB_PR_LABEL"
+}
+
+git config user.name "${GITHUB_ACTOR}"
+git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+
+_update_output="$(TERM=dumb rebar3 update-deps --replace)"
+
+if git diff --exit-code --quiet; then
+    echo "No changes to the dependencies"
+    exit 0
+else
+    echo "Detected changes to dependencies"
+fi
+
+git checkout -b "$BRANCH_NAME"
+git add .
+
+git commit -F- <<EOF
+$COMMIT_TITLE
+
+Updates from "rebar3 update-deps --replace":
+
+$_update_output
+EOF
+
+git push --set-upstream origin "$BRANCH_NAME"
+
+if [[ $(check_pr) == "" ]]; then
+    gh pr create \
+        --label "$GITHUB_PR_LABEL" \
+        --title "$COMMIT_TITLE" \
+        --body-file - <<EOF
+This PR updates the dependencies to their latest versions.
+
+The following changes were made from \`rebar3 update-deps --replace\`:
+
+\`\`\`
+$_update_output
+\`\`\`
+EOF
+fi

.github/workflows/check_deps.yml

@@ -0,0 +1,43 @@
+name: Check Dependencies
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '38 8 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-deps:
+    name: Check Dependencies
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        otp_version: ['27.1']
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ matrix.otp_version }}
+          rebar3-version: '3.22.1'
+          version-type: 'strict'
+
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/rebar3
+            _build
+          key: ${{ runner.os }}-erlang-${{ matrix.otp_version }}-${{ hashFiles('**/*rebar.lock') }}
+
+      - name: Build
+        run: make build
+
+      - name: Check dependencies
+        run: .github/workflows/check-deps.sh
+        env:
+          BRANCH_NAME: update-deps-${{ github.run_id }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}