add prompt helpers

Author: Giles Westwood

lib/prompt.sh

@@ -0,0 +1,35 @@
+# confirm "Would you really like to do a X?" && run_x || exit
+# use return rather than exit if bash function
+# NOTE: this will not work in a loop that is using read, use for loops instead with an altered IFS.
+sk-prompt-confirm() {
+  read -r -p "${1:-Are you sure? [Y/n]} " response
+  case $response in
+    [yY][eE][sS]|[yY])
+      true
+    ;;
+    [n])
+      false
+    ;;
+    *)
+      true
+    ;;
+  esac
+}
+
+sk-prompt-confirm-timeout() {
+  read -r -t 5 -p "${1:-Are you sure? [Y/n]} " response || return 1
+  case $response in
+    [yY][eE][sS]|[yY])
+      true
+    ;;
+    [n])
+      false
+    ;;
+    *)
+      true
+    ;;
+  esac
+}
+
+
+