I tried, yay -S cosmic cosmic-session and cosmic-session-git with no success.
Not sure what you are doing in the AUR.
Endeavour repo has every single Cosmic DE component except the DE itself? Now I’m getting confused 
extra/cosmic-app-library 1.0.0.alpha.1-1 (cosmic)
Cosmic App Library
extra/cosmic-applets 1.0.0.alpha.1-1 (cosmic)
Applets for COSMIC Panel
extra/cosmic-bg 1.0.0.alpha.1-1 (cosmic)
COSMIC session service which applies backgrounds to displays
extra/cosmic-comp 1.0.0.alpha.1-1 (cosmic)
Compositor for the COSMIC desktop environment
extra/cosmic-files 1.0.0.alpha.1-1 (cosmic)
File manager for the COSMIC desktop environment
extra/cosmic-greeter 1.0.0.alpha.1-2 (cosmic)
COSMIC greeter for greetd
extra/cosmic-icon-theme 1.0.0.alpha.1-1
System76 Cosmic icon theme
extra/cosmic-launcher 1.0.0.alpha.1-1 (cosmic)
Layer Shell frontend for Pop Launcher
extra/cosmic-notifications 1.0.0.alpha.1-1 (cosmic)
Layer Shell notifications daemon which integrates with COSMIC
extra/cosmic-osd 1.0.0.alpha.1-1 (cosmic)
COSMIC On-Screen Display
extra/cosmic-panel 1.0.0.alpha.1-1 (cosmic)
XDG Shell Wrapper Panel for Cosmic
extra/cosmic-randr 1.0.0.alpha.1-1 (cosmic)
Library and utility for displaying and configuring Wayland outputs
extra/cosmic-screenshot 1.0.0.alpha.1-1 (cosmic)
Utility for capturing screenshots via XDG Desktop Portal
extra/cosmic-session 1.0.0.alpha.1-1 (cosmic)
Session manager for the COSMIC desktop environment
extra/cosmic-settings 1.0.0.alpha.1-1 (cosmic)
The settings application for the COSMIC desktop environment
extra/cosmic-settings-daemon 1.0.0.alpha.1-1 (cosmic)
Cosmic settings daemon
extra/cosmic-store 1.0.0.alpha.1-1 (cosmic)
Cosmic App Store
extra/cosmic-terminal 1.0.0.alpha.1-2 (cosmic)
Cosmic Terminal Emulator
extra/cosmic-text-editor 1.0.0.alpha.1-1 (cosmic)
Text editor for the COSMIC desktop
extra/cosmic-wallpapers r4.0f2f16d-2 (cosmic)
Wallpapers for the COSMIC Desktop Environment
extra/cosmic-workspaces 1.0.0.alpha.1-1 (cosmic)
Cosmic workspaces
extra/xdg-desktop-portal-cosmic 1.0.0.alpha.1-1 (cosmic)
A backend implementation for xdg-desktop-portal for the COSMIC desktop environment
unless session manager is the Whole Enchilada?
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I have the endeavour repo and I tried, sudo pacman -S cosmic cosmic-session and cosmic-session-git, with no success.
Does Rust have to be installed?
Maybe this will help: Cosmic - Arch Wiki
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Hopefully
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it did indeed just help me right now, thank you! pretty excited to try it out
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I’ve been dealing with either PopOS! Cosmic Alpha or other distros with Cosmic availability via VM for a while now.
Time for a bare-metal test. I’ll be installing CachyOS Cosmic on my Samsung Laptop.
More to come…
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You can probably get cosmic running here:
Pudge
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