Add circle CI #61

	name: Check buck targets and code format
	on: [push, pull_request]
	permissions:
	contents: read

	jobs:
	check:
	name: Check TARGETS file and code format
	runs-on: ubuntu-latest
	steps:
	- name: Checkout feature branch
	uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Fetch from upstream
	run: \|
	git remote add upstream https://github.com/facebook/rocksdb.git && git fetch upstream

	- name: Where am I
	run: \|
	echo git status && git status
	echo "git remote -v" && git remote -v
	echo git branch && git branch

	- name: Setup Python
	uses: actions/setup-python@v1

	- name: Install Dependencies
	run: python -m pip install --upgrade pip

	- name: Install argparse
	run: pip install argparse

	- name: Download clang-format-diff.py
	run: wget https://raw.githubusercontent.com/llvm/llvm-project/release/12.x/clang/tools/clang-format/clang-format-diff.py

	- name: Check format
	run: VERBOSE_CHECK=1 make check-format

	- name: Compare buckify output
	run: make check-buck-targets

	- name: Simple source code checks
	run: make check-sources

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