[v0.5] Add sync deps workflow (#557)

* Add sync deps workflow

* Add sync deps workflow

* List changes in PR description

* Add usage and error handling for pkg/apis version extraction

* Update format of changes for PR description

* Fix missing new line in sync script

* Make default rancher branch release/v2.9

.github/workflows/scripts/sync-deps.sh

@@ -0,0 +1,72 @@
+#!/bin/sh
+#
+# 
+
+set -e
+
+RANCHER_REPO_DIR=$1
+# File to write the changes to
+CHANGES_FILE=${2:-/dev/null}
+
+PKG_APIS="github.com/rancher/rancher/pkg/apis"
+DEPS_TO_SYNC="
+  github.com/rancher/dynamiclistener
+  github.com/rancher/lasso
+  github.com/rancher/wrangler
+  github.com/rancher/wrangler/v2
+  github.com/rancher/wrangler/v3
+"
+
+if [ -z "$RANCHER_REPO_DIR" ]; then
+  usage
+  exit 1
+fi
+
+usage() {
+  echo "$0 <path to rancher repository> [<path to write dependency changes to>]"
+}
+
+update_dep() {
+  module=$1
+  old_version=$2
+  new_version=$3
+
+  echo "Version mismatch for $module (rancher=$new_version, webhook=$old_version) detected"
+  go mod edit -require="$module@$new_version"
+  printf '**%s**\n`%s` => `%s`\n' "$module" "$old_version" "$new_version" >> "$CHANGES_FILE"
+}
+
+rancher_deps=$(cd "$RANCHER_REPO_DIR" && go mod graph)
+webhook_deps=$(go mod graph)
+
+rancher_ref=$(cd "$RANCHER_REPO_DIR" && git rev-parse HEAD)
+if ! rancher_pkg_apis_version=$(go mod download -json "github.com/rancher/rancher/pkg/apis@$rancher_ref" | jq -r '.Version'); then
+  echo "Unable to get version of $PKG_APIS"
+  exit 1
+fi
+webhook_pkg_apis_version=$(echo "$webhook_deps" | grep "^$PKG_APIS@\w*\S" | head -n 1 | cut -d' ' -f1 | cut -d@ -f2)
+
+if [ "$rancher_pkg_apis_version" != "$webhook_pkg_apis_version" ]; then
+  update_dep "$PKG_APIS" "$webhook_pkg_apis_version" "$rancher_pkg_apis_version"
+fi
+
+for dep in $DEPS_TO_SYNC; do
+  if ! rancher_version=$(echo "$rancher_deps" | grep "^$dep@\w*\S"); then
+    continue
+  fi
+
+  if ! webhook_version=$(echo "$webhook_deps" | grep "^$dep@\w*\S"); then
+    continue
+  fi
+
+  rancher_version=$(echo "$rancher_version" | head -n 1 | cut -d' ' -f1 | cut -d@ -f2)
+  webhook_version=$(echo "$webhook_version" | head -n 1 | cut -d' ' -f1 | cut -d@ -f2)
+  if [ "$rancher_version" = "$webhook_version" ]; then
+    continue
+  fi
+
+  update_dep "$dep" "$webhook_version" "$rancher_version"
+done
+
+echo "Running go mod tidy"
+go mod tidy

.github/workflows/sync-deps.yaml

@@ -0,0 +1,85 @@
+name: Sync dependencies
+
+on:
+  workflow_dispatch:
+    inputs:
+      rancher_ref:
+        description: "Version of rancher/rancher to compare"
+        required: true
+        default: "release/v2.9"
+      rancher_repository:
+        description: "Repository for rancher/rancher"
+        required: true
+        default: "rancher/rancher"
+
+env:
+  RANCHER_REF: "${{ github.event.inputs.rancher_ref }}"
+  WEBHOOK_REF: "${{ github.ref_name }}"
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  sync:
+    name: Sync dependencies
+    runs-on: ubuntu-latest
+    steps:
+      - name : Checkout webhook repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          ref: "${{ env.WEBHOOK_REF }}"
+          path: webhook
+
+      - name : Checkout rancher repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          repository: "${{ github.event.inputs.rancher_repository }}"
+          ref: "${{ env.RANCHER_REF }}"
+          path: rancher
+
+      - name: Install dependencies
+        run: sudo snap install yq --channel=v4/stable
+
+      - name: Configure the committer
+        run: |
+          cd webhook
+          git config --global user.name "Webhook Sync Bot"
+          git config --global user.email "[email protected]"
+
+      - name: Run sync-deps script
+        run: |
+          cd webhook
+          BRANCH="sync-deps-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          echo "BRANCH=${BRANCH}" >> $GITHUB_ENV
+          git checkout -b "$BRANCH"
+          ./.github/workflows/scripts/sync-deps.sh ../rancher "changes.md"
+          if [ -f changes.md ]; then
+            git add go.mod go.sum
+            git commit -m "Sync dependencies"
+            git push origin "$BRANCH"
+          fi
+
+      - name: Create PR
+        # Only create the PR if changes were detected
+        if: ${{ hashFiles('webhook/changes.md') != '' }}
+        run: |
+          cd webhook
+          changes=$(cat changes.md)
+          body=$(cat <<EOF
+          # Sync with Rancher
+
+          $changes
+
+          The workflow was triggered by $GITHUB_TRIGGERING_ACTOR.
+          EOF
+          )
+          gh pr create \
+            --title "[$WEBHOOK_REF] Sync webhook dependencies" \
+            --body "$body" \
+            --reviewer "$GITHUB_TRIGGERING_ACTOR" \
+            --repo "${{ github.repository }}" \
+            --head "${{ github.repository_owner }}:$BRANCH" \
+            --base "$WEBHOOK_REF"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}