bitcoin/contrib/devtools

Contents

This directory contains tools for developers working on this repository.

clang-format-diff.py

A script to format unified git diffs according to .clang-format.

Requires clang-format, installed e.g. via brew install clang-format on macOS.

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

copyright_header.py

Provides utilities for managing copyright headers of The Bitcoin Core developers in repository source files. It has three subcommands:

$ ./copyright_header.py report <base_directory> [verbose]
$ ./copyright_header.py update <base_directory>
$ ./copyright_header.py insert <file>

Running these subcommands without arguments displays a usage string.

copyright_header.py report <base_directory> [verbose]

Produces a report of all copyright header notices found inside the source files of a repository. Useful to quickly visualize the state of the headers. Specifying verbose will list the full filenames of files of each category.

copyright_header.py update <base_directory> [verbose]

Updates all the copyright headers of The Bitcoin Core developers which were changed in a year more recent than is listed. For example:

// Copyright (c) <firstYear>-<lastYear> The Bitcoin Core developers

will be updated to:

// Copyright (c) <firstYear>-<lastModifiedYear> The Bitcoin Core developers

where <lastModifiedYear> is obtained from the git log history.

This subcommand also handles copyright headers that have only a single year. In those cases:

// Copyright (c) <year> The Bitcoin Core developers

will be updated to:

// Copyright (c) <year>-<lastModifiedYear> The Bitcoin Core developers

where the update is appropriate.

copyright_header.py insert <file>

Inserts a copyright header for The Bitcoin Core developers at the top of the file in either Python or C++ style as determined by the file extension. If the file is a Python file and it has #! starting the first line, the header is inserted in the line below it.

The copyright dates will be set to be <year_introduced>-<current_year> where <year_introduced> is according to the git log history. If <year_introduced> is equal to <current_year>, it will be set as a single year rather than two hyphenated years.

If the file already has a copyright for The Bitcoin Core developers, the script will exit.

gen-manpages.sh

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/

With in-tree builds this tool can be run from any directory within the repostitory. To use this tool with out-of-tree builds set BUILDDIR. For example:

BUILDDIR=$PWD/build contrib/devtools/gen-manpages.sh

optimize-pngs.py

A script to optimize png files in the bitcoin repository (requires pngcrush).

security-check.py and test-security-check.py

Perform basic security checks on a series of executables.

symbol-check.py

A script to check that the (Linux) executables produced by gitian only contain allowed gcc, glibc and libstdc++ version symbols. This makes sure they are still compatible with the minimum supported Linux distribution versions.

Example usage after a gitian build:

find ../gitian-builder/build -type f -executable | xargs python3 contrib/devtools/symbol-check.py

If only supported symbols are used the return value will be 0 and the output will be empty.

If there are 'unsupported' symbols, the return value will be 1 a list like this will be printed:

.../64/test_bitcoin: symbol memcpy from unsupported version GLIBC_2.14
.../64/test_bitcoin: symbol __fdelt_chk from unsupported version GLIBC_2.15
.../64/test_bitcoin: symbol std::out_of_range::~out_of_range() from unsupported version GLIBCXX_3.4.15
.../64/test_bitcoin: symbol _ZNSt8__detail15_List_nod from unsupported version GLIBCXX_3.4.15

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}