mirror of
https://github.com/cp2k/cp2k.git
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60 lines
2.4 KiB
Markdown
60 lines
2.4 KiB
Markdown
# CP2K Precommit
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The precommit system consists of the following tools that analyze and format the source code:
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- [doxify](../doxify/) to add Doxygen templates.
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- [prettify](../prettify/) to format Fortran files.
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- [analyze_src](../conventions/analyze_src.py) to check copyright banners and a few other things.
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- [ast.parse](https://docs.python.org/3/library/ast.html) to check Python syntax.
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- [clang-format](https://clang.llvm.org/docs/ClangFormat.html) to format C, Cuda, and OpenCL files.
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- [black](https://github.com/psf/black) to format Python scripts.
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- [shfmt](https://github.com/mvdan/sh) to format Shell scripts.
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- [shellcheck](https://github.com/koalaman/shellcheck) to analyze Shell scripts.
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- [mdformat](https://github.com/executablebooks/mdformat) with
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[gfm plugin](https://github.com/hukkin/mdformat-gfm) to format Markdown scripts.
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- [cmake-format](https://github.com/cheshirekow/cmake_format) to format CMake scripts.
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In contrast to the [CP2K-CI](https://github.com/cp2k/cp2k-ci) these tools process each file
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individually, which makes them much more lightweight.
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## Install Git Hook
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The [precommit.py](./precommit.py) script can be readily installed as a git hook:
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```shell
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ln -fs ../../tools/precommit/precommit.py .git/hooks/pre-commit
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```
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## Server
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Many of the tools listed above require more than just Python. To avoid their tedious installation a
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remote server is used by default. It is hosted at <https://precommit.cp2k.org> via
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[Cloud Run](https://cloud.google.com/run).
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The same server can also be started locally when Docker is available:
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```shell
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./start_local_server.sh
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```
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The server can also be installed without Docker by following the steps in the
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[Dockerfile](./Dockerfile).
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Once the server is up and running it can be used like this:
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```shell
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$ export CP2K_PRECOMMIT_SERVER="http://127.0.0.1:8080"
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$ ./precommit.py
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Running precommit checks using 8 workers and server: http://127.0.0.1:8080
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Searching for files...
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```
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## Backups and Cache
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Before precommit runs an external tool on a file it create a backup copy in `obj/precommit`. If the
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tool leaves the file unmodified then the backup copy is remove afterwards. If the tool modifies the
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file and precommit was invoked without `--allow-modifications` then the backup copy is used to
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restore the file's original content.
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After a successful tool run the file's timestamp is recorded in `obj/precommit/cache.json` and
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precommit will skip it in future unless it's invoked with `--no-cache`.
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