From e1a443ed735b84b5e2b86594973673b8f0b1229e Mon Sep 17 00:00:00 2001
From: Han <han2.zhang@intel.com>
Date: Wed, 16 Dec 2020 13:45:14 +0800
Subject: [PATCH 1/3] Create sync-main.yml

---
 .github/workflows/sync-main.yml | 43 +++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 .github/workflows/sync-main.yml

diff --git a/.github/workflows/sync-main.yml b/.github/workflows/sync-main.yml
new file mode 100644
index 0000000000000..360a1d1c70b07
--- /dev/null
+++ b/.github/workflows/sync-main.yml
@@ -0,0 +1,43 @@
+name: automatic sync main branch from llvm-project to llvm
+
+on:
+  schedule:
+  - cron: '*/10 * * * *'
+jobs:
+  sync-main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          path: src
+      - name: Sync
+        env:
+          BRANCH: main
+          SYNC_REPO: https://github.com/llvm/llvm-project
+        run: |
+          cd $GITHUB_WORKSPACE/src
+          branch_exist=`git ls-remote --heads origin $BRANCH | wc -l`
+          if [ $branch_exist -ne 0 ]; then
+              git checkout $BRANCH
+              git pull --ff --ff-only $SYNC_REPO $BRANCH
+              if [ $? -ne 0 ]; then
+                  echo "failed to pull from $SYNC_REPO $BRANCH, abort"
+                  exit 1
+              fi
+              git_status=`git rev-list --count --left-right origin/$BRANCH...$BRANCH`
+              if [ "0	0" == "$git_status" ] ; then
+                  echo "no change, skip"
+              elif [[ "$git_status" =  0* ]] ; then
+                  git push origin
+              else
+                  echo "$BRANCH branch invalid state"
+                  exit 1
+              fi
+          else
+              git remote add upstream $SYNC_REPO
+              git fetch upstream
+              git checkout -B $BRANCH upstream/$BRANCH
+              git push origin
+          fi
+          echo "sync finished"

From 07915ab50c0565378b3e1477d2314c5a104383e2 Mon Sep 17 00:00:00 2001
From: Han <han2.zhang@intel.com>
Date: Thu, 17 Dec 2020 09:15:25 +0800
Subject: [PATCH 2/3] Update sync-main.yml

---
 .github/workflows/sync-main.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/sync-main.yml b/.github/workflows/sync-main.yml
index 360a1d1c70b07..b7c1331d0c6c9 100644
--- a/.github/workflows/sync-main.yml
+++ b/.github/workflows/sync-main.yml
@@ -9,6 +9,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
+          # persist-credentials: false allows us to use our own credentials for
+          # pushing to the repository.  Otherwise, the default github actions token
+          # is used.
+          persist-credentials: false
           fetch-depth: 0
           path: src
       - name: Sync

From c295ea72ca6ba0a817c13147ff25c1a5550d4660 Mon Sep 17 00:00:00 2001
From: Buildbot for SYCL <bb-sycl@intel.com>
Date: Thu, 17 Dec 2020 15:02:20 +0800
Subject: [PATCH 3/3] Update README.md

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index 68cb9cd1deefc..31b46298c6a87 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,9 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for details.
 
 ## DPC++ extensions
 
+
+
+
 DPC++ is an open, cross-architecture language built upon the ISO C++ and Khronos
 SYCL\* standards. DPC++ extends these standards with a number of extensions,
 which can be found in [sycl/doc/extensions](sycl/doc/extensions) directory.