Make rust use XDG directories

Signed-off-by: Severin Kaderli <severin.kaderli@gmail.com>

post-install.sh

@@ -26,8 +26,18 @@ NPM_PACKAGES=(
     "npm-check-updates"
 )
 
+RUST_COMPONENTS=(
+    "rls-preview"
+    "rustfmt-preview"
+)
+
 #######################################
 # Main code
 #######################################
 print_header "Installing global npm packages"
-npm i -g "${NPM_PACKAGES[@]}"
+npm i -g "${NPM_PACKAGES[@]}"
+
+print_header "Install Rust toolchain and components"
+rustup toolchain install beta
+rustup default beta
+rustup component add "${RUST_COMPONENTS[@]}"

system/.env

@@ -23,13 +23,15 @@ export HTTPIE_CONFIG_DIR="${XDG_CONFIG_HOME}/httpie"
 export XAUTHORITY="${XDG_RUNTIME_DIR}/Xauthority"
 export WGETRC="${XDG_CONFIG_HOME}/wget/wgetrc"
 export VIMINIT=":source ${XDG_CONFIG_HOME}/vim/vimrc"
+export CARGO_HOME="${XDG_DATA_HOME}/cargo"
+export RUSTUP_HOME="${XDG_DATA_HOME}/rustup"
 
 # Bash
 export HISTCONTROL=ignoreboth
 export HISTSIZE=1000
 export HISTFILESIZE=2000
 
-# Setting default editor and terminal
+# Setting applications
 export VISUAL=vim
 export EDITOR="$VISUAL"
 export TERMINAL=termite
@@ -50,7 +52,7 @@ export npm_config_prefix="$HOME/.node_modules"
 export GOPATH=$HOME/go
 
 # Adding folders to the PATH variable
-export PATH="$PATH:$HOME/bin:$npm_config_prefix/bin:$GOPATH/bin:$HOME/.config/composer/vendor/bin"
+export PATH="${PATH}:${CARGO_HOME}/bin:${HOME}/bin:${npm_config_prefix}/bin:${GOPATH/}bin:${HOME}/.config/composer/vendor/bin"
 
 # Set bash prompt
 set_bash_prompt() {