Use TERM=vscode-direct where available, for more colours

bashrc

@@ -54,8 +54,16 @@ if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
 fi
 
 if [ "$TERM" == "xterm" ] ; then
-  # Upgrade; I don't think I use anything which doesn't support 256 colour these days.
-  export TERM=xterm-256color
+  # If it's available, use vscode-direct (which supports 16 million
+  # colours via the ';' sequences; required as PuTTY doesn't
+  # understand the ':' sequences).
+  #
+  # https://chadaustin.me/2024/01/truecolor-terminal-emacs/
+  if [[ -r /usr/share/terminfo/v/vscode-direct ]] ; then
+      export TERM=vscode-direct
+  else
+      export TERM=xterm-256color
+  fi
 fi
 
 # If this is an xterm set the title to user@host:dir