Unity7 - Looks like!

Fork of SierraBreeze to provides KDE Plasma window decoration looks like old Unity 7.

Build

There are some dependencies you'll need to build from source. Some people suggested using the following commands:

Ubuntu

sudo apt install build-essential libkf5config-dev libkdecorations2-dev libqt5x11extras5-dev qtdeclarative5-dev extra-cmake-modules libkf5guiaddons-dev libkf5configwidgets-dev libkf5windowsystem-dev libkf5coreaddons-dev gettext

Arch Linux

sudo pacman -S kdecoration qt5-declarative qt5-x11extras    # Decoration
sudo pacman -S cmake extra-cmake-modules                    # Installation

Fedora

sudo dnf install cmake extra-cmake-modules  
sudo dnf install "cmake(Qt5Core)" "cmake(Qt5Gui)" "cmake(Qt5DBus)" "cmake(Qt5X11Extras)" "cmake(KF5GuiAddons)" "cmake(KF5WindowSystem)" "cmake(KF5I18n)" "cmake(KDecoration2)" "cmake(KF5CoreAddons)" "cmake(KF5ConfigWidgets)"

In order to install the theme and add it to your decorations do the following:

git clone https://github.com/ishovkun/SierraBreeze
cd SierraBreeze
mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DKDE_INSTALL_LIBDIR=lib -DBUILD_TESTING=OFF -DKDE_INSTALL_USE_QT_SYS_PATHS=ON
sudo make install

To avoid logging out, issue

kwin_x11 --replace &

That is it! Your new decoration theme should appear in Settings → Application Style → Window Decorations.

Acknowledgments:

• Original project is SierraBreeze by ishovkun
• The authors of Breeze window decorations Martin Gräßlin and Hugo Pereira Da Costa
• Andrey Orst, the author of Breezemite Aurorae window decoration https://github.com/andreyorst/Breezemite
• Chris Holland for his blog about patching Breeze decorations https://zren.github.io/projects/2017/07/08/patching-breeze-window-decorations.html