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README.md

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+# Git third party
+
+Small zero-dependency python utility that is an alternative to [git-submodules](https://git-scm.com/book/en/v2/Git-Tools-Submodules) and [git-subtree](https://manpages.debian.org/testing/git-man/git-subtree.1.en.html), that allows patching third-party code, storing commits in your tree
+
+No need to fork, no need to store all code in your tree, store just your patches
+
+**WARNING:** it is a raw prototype
+
+## Usage
+```bash
+# adding third-party repository
+git-third-party add third-party/RustPython https://github.com/RustPython/RustPython.git a13b99642b0bc13ca89d01768a7ddbec18fe8219
+# ^ git-third-party add <relative path> <repository url> <commit hash>
+
+# now you can modify it as a regular repository, commit your changes
+
+# save patches to push to your origin
+git-third-party save third-party/RustPython
+# ^ git-third-party save <relative path>
+
+# update
+git-third-party update third-party/RustPython
+# ^ git-third-party update <relative path>
+```
+
+## How it works?
+
+It stores (at `/.gitthirdparty`) a configutation that describes all third party repositories and patches (at `/.gitthirdparty-patches/<local/repo/path>`). `save` command updates the patches, `update` command reapplies them
+
+## Todo
+- [ ] commit hooks
+- [ ] updating all
+- [ ] automated tests