ci: refactor compat branch refresh to use patch-based approach

.github/workflows/merge-main-into-compat.yml

@@ -1,4 +1,4 @@
-name: Cherry-pick into Compat
+name: Refresh Compat from Main Patch
 
 on:
   push:
@@ -8,7 +8,7 @@ on:
       - ".github/workflows/merge-main-into-compat.yml"
 
 jobs:
-  cherry-pick:
+  refresh-compat:
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -20,20 +20,9 @@ jobs:
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
-      - name: Cherry-pick commits from last tag
+      - name: Refresh compat with single patch commit
         run: |
-          git fetch origin compat
-          git checkout compat
-          CURRENT_TAG=${{ github.ref_name }}
-          PREV_TAG=$(git describe --tags --abbrev=0 $CURRENT_TAG^ 2>/dev/null || echo "")
-
-          if [ -z "$PREV_TAG" ]; then
-            echo "No previous tag found. Cherry-picking all commits up to $CURRENT_TAG"
-            git rev-list --reverse --no-merges $CURRENT_TAG | xargs -r git cherry-pick
-          else
-            echo "Cherry-picking commits from $PREV_TAG to $CURRENT_TAG"
-            git rev-list --reverse --no-merges $PREV_TAG..$CURRENT_TAG | xargs -r git cherry-pick
-          fi
+          ./scripts/refresh-compat.sh
       - name: Push compat
         run: |
-          git push origin compat
+          git push origin compat --force

scripts/refresh-compat.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+git fetch origin main compat
+git checkout -B compat origin/compat
+patch_file="$(mktemp)"
+git diff origin/main -- . ':(exclude)**/go.mod' ':(exclude)**/go.sum' >"$patch_file"
+sed -i 's/sonic\./json\./g' "$patch_file"
+sed -i 's/"github.com\/bytedance\/sonic"/"encoding\/json"/g' "$patch_file"
+git checkout -B main origin/main
+git branch -D compat
+git checkout -b compat
+git apply "$patch_file"
+mapfile -t changed_go_files < <(git diff --name-only -- '*.go')
+fmt_go_files=()
+for file in "${changed_go_files[@]}"; do
+	[ -f "$file" ] || continue
+	sed -E -i 's/\bsonic[[:space:]]+"encoding\/json"/json "encoding\/json"/g' "$file"
+	fmt_go_files+=("$file")
+done
+if [ "${#fmt_go_files[@]}" -gt 0 ]; then
+	gofmt -w "${fmt_go_files[@]}"
+fi
+git add -A
+git commit -m "Apply compat patch"
+go vet ./...
+go vet -C agent ./...