Update install script

Install golang and use that to install asdf
Link tmux*.conf

install

@@ -48,7 +48,7 @@ unset COMMANDS MISSING
 # RC files
 
 mkdir -pv bak
-for rc in *rc *profile tmux*.conf bashrc.d mutt ; do
+for rc in *rc *profile tmux*.conf bashrc.d mutt tmux*conf ; do
   if [ ! -r $rc ] ; then
     continue
   fi
@@ -79,30 +79,30 @@ if [ $IS_MAC == 1 ] ; then
   brew install wget bash-completion macvim isync
 fi
 
+if [ $IS_LINUX == 1 ] ; then
+  echo "Installing system golang"
+  sudo apt install golang
+else
+  echo "Installing brew golang"
+  brew install golang
+fi
+
 git config --global user.email "paul@blacksun.org.uk"
 git config --global user.name "Paul Walker"
 git config --global pull.rebase true
 git config --global push.default current
 
-if [ ! -d "$HOME/.rbenv" ] ; then
-  git clone https://github.com/rbenv/rbenv.git "$HOME/.rbenv"
-  git clone https://github.com/rbenv/ruby-build.git "$HOME/.rbenv/plugins/ruby-build"
-else
-  echo "Already have $HOME/.rbenv"
-  git -C ~/.rbenv pull
-  git -C ~/.rbenv/plugins/ruby-build pull
-fi
+echo "Getting latest ASDF release"
+ASDF_TAG=$(curl -s -L -H "Accept: application/vnd.github+json" \
+             -H "X-GitHub-Api-Version: 2022-11-28" \
+             https://api.github.com/repos/asdf-vm/asdf/releases/latest | grep "tag_name" | sed -e 's/^.*: \"//' | sed -e 's/",$//')
 
-if [ ! -d "$HOME/.asdf" ] ; then
-  git clone https://github.com/asdf-vm/asdf.git "$HOME/.asdf"
-  . bashrc.d/asdf.bash
-else
-  echo "Already have $HOME/.asdf"
-  git -C ~/.asdf pull
-fi
+echo "Using go to install asdf@${ASDF_TAG}..."
+go install github.com/asdf-vm/asdf/cmd/asdf@${ASDF_TAG}
+mv -v ~/go/bin/asdf ~/bin/
 
 # Add and install these ones.
-ADD_AND_INSTALL="golang ripgrep ag fd bat jq nodejs fzf github-cli task ninja meson"
+ADD_AND_INSTALL="ripgrep fd jq nodejs fzf github-cli ninja meson lazygit"
 if [ $IS_MAC == 1 ] ; then
   echo "Detected macOS, installing extra packages via asdf."
   ADD_AND_INSTALL="$ADD_AND_INSTALL git tmux vim"
@@ -111,7 +111,7 @@ fi
 for plugin in $ADD_AND_INSTALL ; do
   asdf plugin add $plugin && \
     asdf install $plugin latest && \
-    asdf global $plugin latest
+    asdf set -u $plugin latest
 done
 unset ADD_AND_INSTALL
 
@@ -130,7 +130,7 @@ if [ $IS_FREEBSD == 1 ] ; then
 fi
 
 # Just add these, for now.
-ADD_ONLY="python tmux sbcl opam gohugo erlang elixir clojure"
+ADD_ONLY="python tmux sbcl gohugo erlang elixir clojure ag task bat"
 for plugin in $ADD_ONLY ; do 
   asdf plugin add $plugin
 done