add license and pyproject.toml and upload to pypi

LICENSE

@@ -0,0 +1,7 @@
+Copyright 2024 Zilin Zhu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -37,6 +37,20 @@ Note that
 - the varlen versions of the ring attention variants are slow at the moment, please use the non-varlen version or the llama3 api if possible.
 - please remember to adapt the RoPE offset for different api.
 
+### Installation
+
+```bash
+pip install ring-flash-attn
+```
+
+or use the following command to build from source:
+
+```bash
+git clone https://github.com/zhuzilin/ring-flash-attention.git
+cd ring-flash-attention
+pip install .
+```
+
 ### Limits
 
 There are some arithmetic errors with the current implementation. The reason for them is probably that flash attention will return bf16 value for each block, so we cannot accumluate the values with the original fp32 ones.

pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "ring-flash-attn"
+version = "0.1.0"
+authors = [
+  { name="zhuzilin", email="[email protected]" },
+]
+description = "Ring attention implementation with flash attention."
+readme = "README.md"
+requires-python = ">=3.8"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+]
+
+[project.urls]
+Homepage = "https://github.com/zhuzilin/ring-flash-attention"
+Issues = "https://github.com/zhuzilin/ring-flash-attention/issues"