How to check what packages were added (installed) during the installation of an application. For example, I have been installing MPV applications recently and I want to know what was installed in addition to the MPV itself. With neofetch I see that there are more by 60 packages.
And how to return to the state before installation? I tried the command -Rncs mpv but I get a message that I can not do. I would like to see how to return to exactly the same state as before installing the MPV add-ons (I had probably 805 packages at the time)
Looks like the Arch wiki is your friend.
I did not know about this command, but could be this one as described in the wiki, under quering database packages
To retrieve a list of the files installed by a package:
$ pacman -Ql package_name
I would use the following, same Arch wiki page.
To remove a package and its dependencies which are not required by any other installed package:
$ pacman -Rs package_name
It’s not easy to know exactly, because some of the dependencies used by mpv could be installed as dependencies for some other package.
You can see mpv dependencies with :
yay -Qi mpv or pacman -Qi mpv
Depends On : alsa-lib libasound.so=2-64 desktop-file-utils ffmpeg libavcodec.so=59-64
libavdevice.so=59-64 libavfilter.so=8-64 libavformat.so=59-64
libavutil.so=57-64 libswresample.so=4-64 libswscale.so=6-64 glibc
hicolor-icon-theme jack libjack.so=0-64 lcms2 liblcms2.so=2-64 libarchive
libarchive.so=13-64 libass libass.so=9-64 libbluray libbluray.so=2-64
libcdio libcdio-paranoia libdrm libdvdnav libdvdread libegl libgl
libglvnd libjpeg libjpeg.so=8-64 libplacebo libplacebo.so=208-64 libpulse
libpulse.so=0-64 libva libva.so=2-64 libva-drm.so=2-64 libva-wayland.so=2-64
libva-x11.so=2-64 libvdpau libx11 libxext libxinerama libxkbcommon
libxkbcommon.so=0-64 libxrandr libxss libxv luajit mesa mujs rubberband
librubberband.so=2-64 shaderc libshaderc_shared.so=1-64 uchardet
vulkan-icd-loader wayland xdg-utils zlib
For example, hicolor-icon-theme is required by Xfce, ffmpeg by Firefox, mesa is installed by default for the hardware acceleration of your GPU.
The options used with pacman can be used with yay :
Wondering if the first command I posted above would list only the packages installed by the program, meaning that if some packages were already on the system it would not add them to the list.
sudo pacman -Rs
Should take care of it, won’t delete depencies needed by other packages.
For example, command
pactree -d1 "application-name"
should show direct dependencies.
But it is not easy to know, unless you note it somewhere or you search in the journal, how the packages were installed chronologically and which one were installed first as dependencies of others.
You could use pacseek. It will show you everything that is installed or you can look up a particular package and it will tell you it’s dependencies. If pacseek isn’t installed you have to install it.