conditionally connect /dev/tty only when environment var TTY=1

ocaml · Apr 5, 2023 · 4a1b6d6 · 4a1b6d6
1 parent 950f614
commit 4a1b6d6
Showing 1 changed file with 12 additions and 4 deletions.
diff --git a/shell/install.sh b/shell/install.sh
@@ -186,14 +186,22 @@ usage() {
     echo "using '--fresh' or '--dev'"
 }
 
+# Conditionally connect /dev/tty when
+# the environment variable TTY is set to 1
+if ${TTY+false}; then
+  TTY=no
+fi
 R=
 prompt() {
-  # expects to be called as prompt "Do you want to do this? [Y/n]"
-  printf "$1"
-  read R </dev/tty
+  # expects to be called as prompt "Do you want to do this? [Y/n] "
+  printf "($TTY) $1"
+  if [ $TTY = 1 ]; then
+    read R </dev/tty
+  else
+    read R
+  fi
 }
 
-
 RESTORE=
 NOBACKUP=
 FRESH=