[actions] Add auto cherry-pick actions to release branch (sonic-net#1…

…1496) (sonic-net#12337)

* [actions] Add github actions to auto cherry-pick prs to release branches

* Add README, fix workflow

Co-authored-by: Liu Shilong <shilongliu@microsoft.com>

.github/workflows/README.md

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+#  Github actions README
+This is an introduction about auto-cherry-pick workflow.
+take 202205 branch for example:
+1. pr_cherrypick_prestep:
+```mermaid
+graph
+Start(Origin PR) --> A{merged?}
+A -- NO --> STOP
+A -- YES --> A1{Approved<br> for 202205<br> Branch?}
+A1 -- NO --> STOP
+A1 -- YES --> A2(pr_cherrypick_prestep)
+B(pr_cherrypick_prestep)
+B --> B1{cherry pick<br>conflict?}
+B1 -- YES --> B2(Add tag:<br>Cherry Pick Confclit_202205) --> B3(Add comment:<br>refer author code conflict) --> STOP1(STOP)
+B1 -- NO --> B4(Create New PR) -- success --> B5(New PR add tag:<br> automerge) --> B6(New PR add comment:<br>Origin PR link) --> B7(Origin PR add tag:<br>Created PR to 202205 Branch) --> B8(Origin PR add comment:<br>New PR link)
+B4 -- fail --> STOP1
+```
+
+2. automerge:
+```mermaid
+graph
+Start(PR azp finished successfully) --> A{author:<br>mssonicbld?}
+A -- NO --> STOP
+A -- YES --> B{tag:<br>automerge?} -- YES --> C(Merge PR)
+B -- NO --> STOP
+```
+
+3. pr_cherrypick_poststep:
+```mermaid
+graph
+A(PR is Merged) --> B{tag:<br>automerge?}
+B -- YES --> B1{author:<br>mssonicbld?}
+B1 -- YES --> B2{"title starts:<br>[action] [PR:123]"}
+B2 -- YES --> C(Origin PR remove tag:<br> Created PR to 202205 Branch) --> D(Origin PR add tag:<br> Included in 202205 Branch)
+B -- NO --> STOP
+B1 -- NO --> STOP
+B2 -- NO --> STOP
+```

.github/workflows/pr_cherrypick_poststep.yml

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+name: PostCherryPick
+on:
+  pull_request_target:
+    types:
+    - closed
+    branches:
+    - '20*'
+
+jobs:
+  post_cherry_pick:
+    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'automerge') && github.event.pull_request.head.user.login == 'mssonicbld' && startsWith(github.event.pull_request.title, '[action]')
+    runs-on: ubuntu-latest
+    steps:
+    - name: Debug
+      env:
+        GITHUB_CONTEXT: ${{ toJson(github) }}
+      run: echo $GITHUB_CONTEXT | jq
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        persist-credentials: false
+    - name: Main
+      env:
+        GITHUB_CONTEXT: ${{ toJson(github) }}
+        TOKEN: ${{ secrets.TOKEN }}
+      run: |
+        set -e
+        pr_url=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request._links.html.href")
+        pr_id=$(echo $GITHUB_CONTEXT | jq -r ".event.number")
+        base_ref=$(echo $GITHUB_CONTEXT | jq -r ".base_ref")
+        echo ${TOKEN} | gh auth login --with-token
+        title=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request.title")
+        origin_pr_id=$(echo $title | grep -Eo "\[action\] \[PR:[0-9]*\]" | grep -Eo "[0-9]*")
+        origin_pr_url=$(echo $pr_url | sed "s/$pr_id/$origin_pr_id/")
+        echo =============================
+        echo pr_url:        $pr_url
+        echo pr_id:         $pr_id
+        echo base_ref:      $base_ref
+        echo title:         $title
+        echo origin_pr_id:  $origin_pr_id
+        echo origin_pr_url: $origin_pr_url
+        echo =============================
+        # Add label
+        if [[ "$origin_pr_id" == "" ]];then
+          echo "original PR didn't found."
+          exit 1
+        fi
+        gh pr edit $origin_pr_url --add-label "Included in ${base_ref} Branch"
+        gh pr edit $origin_pr_url --remove-label "Created PR to ${base_ref} Branch,Request for ${base_ref} Branch,Approved for ${base_ref} Branch"

.github/workflows/pr_cherrypick_prestep.yml

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+name: PreCherryPick
+on:
+  pull_request_target:
+    types:
+    - labeled
+    - closed
+    branches:
+    - master-test
+
+jobs:
+  pre_cherry_pick:
+    if: github.event.pull_request.merged == true && ( (github.event.action == 'closed' && contains(join(github.event.pull_request.labels.*.name, ','), 'Approved for 20')) || (github.event.action == 'labeled' && startsWith(github.event.label.name, 'Approved for 20')) )
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        persist-credentials: false
+    - name: Debug
+      env:
+        GITHUB_CONTEXT: ${{ toJson(github) }}
+      run: echo $GITHUB_CONTEXT | jq
+    - name: Main
+      env:
+        GITHUB_CONTEXT: ${{ toJson(github) }}
+        TOKEN: ${{ secrets.TOKEN }}
+      run: |
+        set -e
+
+        sha=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request.merge_commit_sha")
+        pr_id=$(echo $GITHUB_CONTEXT | jq -r ".event.number")
+        pr_url=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request._links.html.href")
+        repository=$(echo $GITHUB_CONTEXT | jq -r ".repository")
+        labels=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request.labels[].name")
+        author=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request.base.user.login")
+        branches=$(git branch -a --list 'origin/20????' | awk -F/ '{print$3}' | grep -E "202[0-9]{3}")
+        if [[ $(echo $GITHUB_CONTEXT | jq -r ".event.action") == "labeled" ]];then
+          labels=$(echo $GITHUB_CONTEXT | jq -r ".event.label.name")
+        fi
+        title=$(echo $GITHUB_CONTEXT | jq -r ".event.pull_request.title")
+        echo =============================
+        echo SHA:           $sha
+        echo PRID:          $pr_id
+        echo pr_url:        $pr_url
+        echo repository:    $repository
+        echo branches:      $branches
+        echo labels:
+        echo "$labels"
+        echo ${TOKEN} | gh auth login --with-token
+        echo author:        $author
+        echo title:         $title
+        echo =============================
+
+        git config user.name mssonicbld
+        git config user.email sonicbld@microsoft.com
+        git config credential.https://gitpro.ttaallkk.top.username mssonicbld
+        git remote add mssonicbld https://mssonicbld:${TOKEN}@github.com/mssonicbld/sonic-buildimage
+        git fetch mssonicbld
+        git remote -vv
+
+        cherry_pick(){
+          set -e
+          local create_pr=''
+          while read label
+          do
+            echo label: $label
+            if [[ "$label" == "Approved for $branch Branch" ]];then
+              create_pr=1
+            fi
+            if [[ "$label" == "Created PR to $branch Branch" ]];then
+              echo "already has tag: Created PR to $branch Branch, return"
+              return 0
+            fi
+            if [[ "$label" == "Included in $branch Branch" ]];then
+              echo "already has tag: Included in $branch Branch, return"
+              return 0
+            fi
+            if [[ "$label" == "Cherry Pick Conflict_$branch" ]];then
+              echo "already has tag: Cherry Pick Conflict_$branch, return"
+              return 0
+            fi
+          done <<< "$labels"
+
+          if [[ "$create_pr" != "1" ]];then
+            echo "Didn't find 'Approved for $branch Branch' tag."
+            return 0
+          fi
+          # Begin to cherry-pick PR
+          git cherry-pick --abort 2>/dev/null || true
+          git clean -xdff 2>/dev/null || true
+          git reset HEAD --hard || true
+          git checkout -b $branch --track origin/$branch
+          git status | grep "working tree clean"
+
+          if ! git cherry-pick $sha;then
+            echo 'cherry-pick failed.'
+            git cherry-pick --abort
+            git status | grep "working tree clean"
+            # Add label
+            gh pr edit $pr_url --add-label "Cherry Pick Conflict_$branch"
+            echo 'Add label "Cherry Pick Conflict_$branch" success'
+            gh pr comment $pr_url --body "@${author} PR conflicts with $branch branch"
+            echo 'Add commnet "@${author} PR conflicts with $branch branch"'
+          else
+            # Create PR to release branch
+            git push mssonicbld HEAD:$branch-${pr_id} -f
+            result=$(gh pr create -R ${repository} -H mssonicbld:$branch-${pr_id} -B $branch -t "[action] [PR:$pr_id] $title" -b '' 2>&1)
+            echo $result | grep "already exists" && { echo $result; return 0; }
+            echo $result | grep github.com || { echo $result; return 1; }
+            new_pr_rul=$(echo $result | grep github.com)
+            echo new_pr_rul:    $new_pr_rul
+
+            # Add label to old PR
+            gh pr edit $pr_url --add-label "Created PR to $branch Branch"
+            echo Add label Created PR to $branch Branch
+            # Add comment to old PR
+            gh pr comment $pr_url --body "Cherry-pick PR to $branch: ${new_pr_rul}"
+            echo Add comment to old PR
+
+            # Add label to new PR
+            gh pr edit $new_pr_rul --add-label "automerge"
+            echo Add label automerge to new PR
+            # Add comment to new PR
+            gh pr comment $new_pr_rul --body "Original PR: ${pr_url}"
+            echo Add comment to new PR
+          fi
+        }
+
+        for branch in $branches
+        do
+          echo -------------------------------------------
+          echo Begin to parse Branch: $branch
+          cherry_pick
+        done
+