nixos/foot: only modify the prompt when running inside foot (#534737)

nixos/modules/programs/foot/bashrc

@@ -1,3 +1,8 @@
+case "$TERM" in
+  foot*) : ;;
+  *) return 0 ;;
+esac
+
 osc7_cwd() {
     local strlen=${#PWD}
     local encoded=""

nixos/modules/programs/foot/config.fish

@@ -1,3 +1,7 @@
+if ! string match -q "foot*" "$TERM"
+  return 0
+end
+
 function update_cwd_osc --on-variable PWD --description 'Notify terminals when $PWD changes'
     if status --is-command-substitution || set -q INSIDE_EMACS
         return

nixos/modules/programs/foot/zshrc

@@ -1,3 +1,8 @@
+case "$TERM" in
+  foot*) : ;;
+  *) return 0 ;;
+esac
+
 function osc7-pwd() {
     emulate -L zsh # also sets localoptions for us
     setopt extendedglob