To fetch a pull requests by its ID, I probably googled “github checkout pull request” a hundred times by now. Here is a simple Git alias which goes into the .gitconfig to make that a bit easier:

  checkout-pr = "!f() { git fetch origin pull/$1/head:pr-$1 && git checkout pr-$1; }; f"

Now it’s just a matter of git checkout-pr 42 to check the changes of pull request #42 on my local system.

Quick reminder how to use the alternatives system to call Neovim:

sudo update-alternatives --install /usr/bin/vi vi /usr/local/bin/nvim
sudo update-alternatives --install /usr/bin/vim vim /usr/local/bin/nvim
sudo update-alternatives --install /usr/bin/editor editor /usr/local/bin/nvim

… and to change it

sudo update-alternatives --config vi

pkg-config is a freedesktop standard and implementation that helps developers finding correct compile and link flags of dependencies. Despite its very low version number, it is the de facto method for determining said flags on the Linux desktop. An oft-forgotten feature of pkg-config is the ability of a package to expose arbitrary key-value meta data. This allows dependent applications to find data paths, plugins to know where to install themselves or determining tool paths.

Although CMake supports pkg-config for quite some time with its FindPkgConfig module, it only queries for the compile and link information. If you want to get a variable value you are out of luck. But fear not! Just stick this into a CMake module

find_package(PkgConfig REQUIRED)

function(pkg_check_variable _pkg _name)
    string(TOUPPER ${_pkg} _pkg_upper)
    string(TOUPPER ${_name} _name_upper)
    string(REPLACE "-" "_" _pkg_upper ${_pkg_upper})
    string(REPLACE "-" "_" _name_upper ${_name_upper})
    set(_output_name "${_pkg_upper}_${_name_upper}")

    execute_process(COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=${_name} ${_pkg}
                    OUTPUT_VARIABLE _pkg_result

    set("${_output_name}" "${_pkg_result}" CACHE STRING "pkg-config variable ${_name} of ${_pkg}")

and you can easily query information like this

pkg_check_modules(GLIB glib-2.0)
pkg_check_variable(glib-2.0 glib-genmarshal)
message("Path: ${GLIB_2.0_GLIB_GENMARSHAL}")

I found the time to update my static comment script and will have the time to review comments again for the foreseeable future. Thus spam bots: ready, steady, go!