cmake-common
============

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Various utilities to help develop C++/CMake projects.

Toolchains
----------

Supported platform/build system/compiler combinations include, but are not
limited to:

| Platform | Build system | Compiler
| -------- | ------------ | --------
| Linux    | make         | Clang
|          |              | GCC
|          |              | MinGW-w64
| Windows  | make \[1\]   | Clang (clang/clang++)
|          |              | Clang (clang-cl \[2\])
|          |              | MinGW-w64
|          | msbuild      | MSVC
| Cygwin   | make         | Clang
|          |              | GCC
|          |              | MinGW-w64

1. Both GNU `make` and MinGW `mingw32-make`.
2. Boost 1.69.0 or higher only.

All of those are verified continuously by the "Boost (toolsets)" and "Examples
(toolsets)" workflows.

Usage
-----

### common.cmake

Use in a project by putting

    include(path/to/common.cmake)

in CMakeLists.txt.

This file aids in quick-and-dirty development by

* linking everything (including the runtime) statically by default,
* setting some useful compilation options (enables warnings, defines useful
Windows-specific macros, strips debug symbols in release builds, etc.).

Everything is optional (use the `CC_*` CMake options to opt out).

### Boost

Download & build the Boost libraries in a cross-platform way.

    $ python3 -m project.boost.download 1.72.0
    ...

    $ python3 -m project.boost.build -- boost_1_72_0/ --with-filesystem --with-program_options
    ...

Pass the `--help` flag to view detailed usage information.

    $ python3 -m project.boost.download --help
    $ python3 -m project.boost.build --help

### CMake project

Build (and optionally, install) a CMake project.

    $ python3 -m project.cmake.build --configuration Release --install path/to/somewhere -- examples/simple
    ...

    $ ./path/to/somewhere/bin/foo
    foo

Pass the `--help` flag to view detailed usage information.

    $ python3 -m project.cmake.build --help

### CI

One of the goals was to merge Travis & AppVeyor build scripts for the various
projects I have.
This project provides the scripts for both of these CI systems with
nearly-identical interfaces.
Internally, they call the generic scripts from above, auto-filling some
parameters from environment variables.

Pass the `--help` flag to a script to view detailed usage information.

#### Travis

Bootstrap Boost and/or build a CMake project:

    $ python3 -m project.ci.travis.boost -- --with-test

    $ python3 -m project.ci.travis.cmake --install

Environment variables:

* `platform`,
* `configuration`,
* `boost_version`.

#### AppVeyor

Bootstrap Boost (seldom used, since AppVeyor pre-builds many Boost versions)
and/or build a CMake project:

    > C:\Python36-x64\python.exe -m project.ci.appveyor.boost -- --with-filesystem

    > C:\Python36-x64\python.exe -m project.ci.appveyor.cmake --install

Environment variables:

* `PLATFORM`,
* `CONFIGURATION`,
* `boost_version`.

#### GitHub Actions

Bootstrap Boost and/or build a CMake project:

    > python -m project.ci.github.boost -- --with-program_options

    > python -m project.ci.github.cmake --install

Environment variables:

* `platform`,
* `configuration`,
* `boost_version`.

### clang-format.py

`clang-format` all C/C++ files in a project.

    $ cd project/
    $ python3 path/to/tools/clang-format.py      # Prints a diff
    $ python3 path/to/tools/clang-format.py -i   # Edits files in-place

Examples
--------

I use this in all of my C++/CMake projects, e.g. [aes-tools] and [math-server].

[aes-tools]: https://github.com/egor-tensin/aes-tools
[math-server]: https://github.com/egor-tensin/math-server

License
-------

Distributed under the MIT License.
See [LICENSE.txt] for details.

[LICENSE.txt]: LICENSE.txt