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bitcoin/contrib/devtools/README.md
2025-12-19 16:58:36 +00:00

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Contents
========
This directory contains tools for developers working on this repository.
deterministic-fuzz-coverage
===========================
A tool to check for non-determinism in fuzz coverage. To get the help, run:
```
cargo run --manifest-path ./contrib/devtools/deterministic-fuzz-coverage/Cargo.toml -- --help
```
To execute the tool, compilation has to be done with the build options:
```
-DCMAKE_C_COMPILER='clang' -DCMAKE_CXX_COMPILER='clang++' -DBUILD_FOR_FUZZING=ON -DCMAKE_CXX_FLAGS='-fprofile-instr-generate -fcoverage-mapping'
```
Both llvm-profdata and llvm-cov must be installed. Also, the qa-assets
repository must have been cloned. Finally, a fuzz target has to be picked
before running the tool:
```
cargo run --manifest-path ./contrib/devtools/deterministic-fuzz-coverage/Cargo.toml -- $PWD/build_dir $PWD/qa-assets/fuzz_corpora fuzz_target_name
```
deterministic-unittest-coverage
===========================
A tool to check for non-determinism in unit-test coverage. To get the help, run:
```
cargo run --manifest-path ./contrib/devtools/deterministic-unittest-coverage/Cargo.toml -- --help
```
To execute the tool, compilation has to be done with the build options:
```
-DCMAKE_C_COMPILER='clang' -DCMAKE_CXX_COMPILER='clang++' -DCMAKE_CXX_FLAGS='-fprofile-instr-generate -fcoverage-mapping'
```
Both llvm-profdata and llvm-cov must be installed.
```
cargo run --manifest-path ./contrib/devtools/deterministic-unittest-coverage/Cargo.toml -- $PWD/build_dir <boost unittest filter>
```
clang-format-diff.py
===================
A script to format unified git diffs according to [.clang-format](../../src/.clang-format).
Requires `clang-format`, installed e.g. via `brew install clang-format` on macOS,
or `sudo apt install clang-format` on Debian/Ubuntu.
For instance, to format the last commit with 0 lines of context,
the script should be called from the git root folder as follows.
```
git diff -U0 HEAD~1.. | ./contrib/devtools/clang-format-diff.py -p1 -i -v
```
gen-manpages.py
===============
A small script to automatically create manpages in ../../doc/man by running the release binaries with the -help option.
This requires help2man which can be found at: https://www.gnu.org/software/help2man/
This script assumes a build directory named `build` as suggested by example build documentation.
To use it with a different build directory, set `BUILDDIR`.
For example:
```bash
BUILDDIR=$PWD/my-build-dir contrib/devtools/gen-manpages.py
```
headerssync-params.py
=====================
A script to generate optimal parameters for the headerssync module (stored in src/kernel/chainparams.cpp). It takes no command-line
options, as all its configuration is set at the top of the file. It runs many times faster inside PyPy. Invocation:
```bash
pypy3 contrib/devtools/headerssync-params.py
```
gen-bitcoin-conf.sh
===================
Generates a bitcoin.conf file in `share/examples/` by parsing the output from `bitcoind --help`. This script is run during the
release process to include a bitcoin.conf with the release binaries and can also be run by users to generate a file locally.
When generating a file as part of the release process, make sure to commit the changes after running the script.
This script assumes a build directory named `build` as suggested by example build documentation.
To use it with a different build directory, set `BUILDDIR`.
For example:
```bash
BUILDDIR=$PWD/my-build-dir contrib/devtools/gen-bitcoin-conf.sh
```
circular-dependencies.py
========================
Run this script from the root of the source tree (`src/`) to find circular dependencies in the source code.
This looks only at which files include other files, treating the `.cpp` and `.h` file as one unit.
Example usage:
cd .../src
../contrib/devtools/circular-dependencies.py {*,*/*,*/*/*}.{h,cpp}