rust env test

use std::env;

fn main() {
    let x = env::vars();
    for (a, b) in x {
        println!("{:?} {:?}", a, b)
    }
}

"ALTERNATE_EDITOR" "emacsclient -c "
"BASH_FUNC_pathappend%%" "() {  pathremove \"${1}\" \"${2}\";\n local PATHVARIABLE=${2:-PATH};\n export \"$PATHVARIABLE\"=\"${!PATHVARIABLE:+${!PATHVARIABLE}:}$1\"\n}"
"BASH_FUNC_pathprepend%%" "() {  pathremove \"${1}\" \"${2}\";\n local PATHVARIABLE=${2:-PATH};\n export \"$PATHVARIABLE\"=\"$1${!PATHVARIABLE:+:${!PATHVARIABLE}}\"\n}"
"BASH_FUNC_pathremove%%" "() {  local IFS=':';\n local NEWPATH;\n local DIR;\n local PATHVARIABLE=${2:-PATH};\n for DIR in ${!PATHVARIABLE};\n do\n if [ \"${DIR}\" != \"${1}\" ]; then\n NEWPATH=${NEWPATH:+$NEWPATH:}$DIR;\n fi;\n done;\n export \"$PATHVARIABLE\"=\"${NEWPATH}\"\n}"
"BROWSER" "firefox"
"CARGO" "/home/alexforsale/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo"
"CARGO_HOME" "/home/alexforsale/.cargo"
"CARGO_MANIFEST_DIR" "/tmp/babel-5iTIx3/cargoDOdDFj"
"CARGO_MANIFEST_PATH" "/tmp/babel-5iTIx3/cargoDOdDFj/Cargo.toml"
"CARGO_PKG_AUTHORS" ""
"CARGO_PKG_DESCRIPTION" ""
"CARGO_PKG_HOMEPAGE" ""
"CARGO_PKG_LICENSE" ""
"CARGO_PKG_LICENSE_FILE" ""
"CARGO_PKG_NAME" "cargoDOdDFj"
"CARGO_PKG_README" ""
"CARGO_PKG_REPOSITORY" ""
"CARGO_PKG_RUST_VERSION" ""
"CARGO_PKG_VERSION" "0.1.0"
"CARGO_PKG_VERSION_MAJOR" "0"
"CARGO_PKG_VERSION_MINOR" "1"
"CARGO_PKG_VERSION_PATCH" "0"
"CARGO_PKG_VERSION_PRE" ""
"CLICOLOR" "1"
"DBUS_SESSION_BUS_ADDRESS" "unix:path=/run/user/1000/bus"
"DEBUGINFOD_URLS" "https://debuginfod.archlinux.org "
"DESKTOP_SESSION" "i3"
"DISPLAY" ":0"
"DISTRO" "arch"
"DISTROVER" "rolling"
"EDITOR" "emacsclient -t "
"FILE" "emacsclient -c -e (dired-jump)"
"GOPATH" "/home/alexforsale/.local"
"GPG_TTY" "/dev/tty1"
"GTK2_RC_FILES" "/home/alexforsale/.config/gtk-2.0/gtkrc"
"GTK_MODULES" "canberra-gtk-module"
"GTK_RC_FILES" "/home/alexforsale/.config/gtk-1.0/gtkrc"
"GTK_THEME" "Breeze-Dark"
"HG" "/usr/bin/hg"
"HISTFILE" "/home/alexforsale/.local/share/bash/bash_history"
"HOME" "/home/alexforsale"
"I3SOCK" "/run/user/1000/i3/ipc-socket.2313"
"LANG" "en_US.UTF-8"
"LD_LIBRARY_PATH" "/tmp/babel-5iTIx3/cargoDOdDFj/target/debug/deps:/tmp/babel-5iTIx3/cargoDOdDFj/target/debug:/home/alexforsale/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib:/home/alexforsale/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib"
"LOGNAME" "alexforsale"
"LS_COLORS" "rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=00:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.7z=01;31:*.ace=01;31:*.alz=01;31:*.apk=01;31:*.arc=01;31:*.arj=01;31:*.bz=01;31:*.bz2=01;31:*.cab=01;31:*.cpio=01;31:*.crate=01;31:*.deb=01;31:*.drpm=01;31:*.dwm=01;31:*.dz=01;31:*.ear=01;31:*.egg=01;31:*.esd=01;31:*.gz=01;31:*.jar=01;31:*.lha=01;31:*.lrz=01;31:*.lz=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.lzo=01;31:*.pyz=01;31:*.rar=01;31:*.rpm=01;31:*.rz=01;31:*.sar=01;31:*.swm=01;31:*.t7z=01;31:*.tar=01;31:*.taz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tgz=01;31:*.tlz=01;31:*.txz=01;31:*.tz=01;31:*.tzo=01;31:*.tzst=01;31:*.udeb=01;31:*.war=01;31:*.whl=01;31:*.wim=01;31:*.xz=01;31:*.z=01;31:*.zip=01;31:*.zoo=01;31:*.zst=01;31:*.avif=01;35:*.jpg=01;35:*.jpeg=01;35:*.jxl=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.webp=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:*~=00;90:*#=00;90:*.bak=00;90:*.crdownload=00;90:*.dpkg-dist=00;90:*.dpkg-new=00;90:*.dpkg-old=00;90:*.dpkg-tmp=00;90:*.old=00;90:*.orig=00;90:*.part=00;90:*.rej=00;90:*.rpmnew=00;90:*.rpmorig=00;90:*.rpmsave=00;90:*.swp=00;90:*.tmp=00;90:*.ucf-dist=00;90:*.ucf-new=00;90:*.ucf-old=00;90:"
"MAIL" "/var/spool/mail/alexforsale"
"MAIL_APP" "thunderbird"
"MM_CHARSET" "en_US.UTF-8"
"MONITOR1" "DP-1"
"MOTD_SHOWN" "pam"
"PATH" "/home/alexforsale/.local/perl5/bin:/home/alexforsale/.ghcup/bin:/home/alexforsale/.cargo/bin:/home/alexforsale/.cabal/bin:/home/alexforsale/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/usr/lib/rustup/bin"
"PERL5LIB" "/home/alexforsale/.local/perl5/lib/perl5"
"PERL_LOCAL_LIB_ROOT" "/home/alexforsale/.local/perl5"
"PERL_MB_OPT" "--install_base \"/home/alexforsale/.local/perl5\""
"PERL_MM_OPT" "INSTALL_BASE=/home/alexforsale/.local/perl5"
"PWD" "/tmp/babel-5iTIx3/cargoDOdDFj"
"QT_XCB_GL_INTEGRATION" "none"
"RUSTUP_HOME" "/home/alexforsale/.rustup"
"RUSTUP_TOOLCHAIN" "stable-x86_64-unknown-linux-gnu"
"RUST_BACKTRACE" "0"
"RUST_RECURSION_COUNT" "1"
"SCREENDIR" "/home/alexforsale/.config/screen"
"SCREENRC" "/home/alexforsale/.config/screen/config"
"SHELL" "/usr/bin/bash"
"SHLVL" "2"
"SSH_AGENT_PID" "2186"
"SSH_ASKPASS" "ssh-askpass"
"SSH_AUTH_SOCK" "/tmp/ssh-XXXXXXZtMjDO/agent.2185"
"SSL_CERT_DIR" "/etc/ssl/certs"
"SSL_CERT_FILE" "/etc/ssl/cert.pem"
"SUDO_ASKPASS" "/home/alexforsale/.local/bin/ssh-askpass"
"TERM" "ansi"
"TERMINAL" "alacritty"
"USER" "alexforsale"
"VISUAL" "emacsclient -c "
"WINDOWPATH" "1"
"XAUTHORITY" "/home/alexforsale/.Xauthority"
"XCURSOR_PATH" ":/usr/share/icons:/home/alexforsale/.local/share/icons"
"XCURSOR_SIZE" "24"
"XCURSOR_THEME" "Bibata-Modern-Classic"
"XDG_CACHE_HOME" "/home/alexforsale/.cache"
"XDG_CONFIG_HOME" "/home/alexforsale/.config"
"XDG_DATA_DIRS" "/usr/share:/usr/local/share"
"XDG_DATA_HOME" "/home/alexforsale/.local/share"
"XDG_DESKTOP_DIR" "/home/alexforsale/Desktop"
"XDG_DOCUMENTS_DIR" "/home/alexforsale/Documents"
"XDG_DOWNLOAD_DIR" "/home/alexforsale/Downloads"
"XDG_MUSIC_DIR" "/home/alexforsale/Music"
"XDG_PICTURES_DIR" "/home/alexforsale/Pictures"
"XDG_PUBLICSHARE_DIR" "/home/alexforsale/Public"
"XDG_RUNTIME_DIR" "/run/user/1000"
"XDG_SEAT" "seat0"
"XDG_SESSION_CLASS" "user"
"XDG_SESSION_ID" "1"
"XDG_SESSION_TYPE" "tty"
"XDG_TEMPLATES_DIR" "/home/alexforsale/Templates"
"XDG_VIDEOS_DIR" "/home/alexforsale/Videos"
"XDG_VTNR" "1"
"_" "/usr/bin/emacs"
"npm_config_prefix" "/home/alexforsale/.local"

use std::env;

fn main () {
    let xdg_session_type = env::var("XDG_SESSION_TYPE");

    match xdg_session_type {
        Ok(val) =>  println!("XDG_SESSION_TYPE: {}", val),
        Err(e) => eprintln!("Couldn't read XDG_SESSION_TYPE: {}", e),
    }
}

XDG_SESSION_TYPE: wayland