From 32ffdce33b4c25031136c674f6baeb19869f77f3 Mon Sep 17 00:00:00 2001
From: "Brian M. Schilder" <34280215+bschilder@users.noreply.github.com>
Date: Mon, 27 Jun 2022 11:12:59 -0400
Subject: [PATCH] Add `requireNamespace` for `semver` package

This lets users know exactly what they need to do.
---
 R/is_python_package_with_version_installed.R | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/R/is_python_package_with_version_installed.R b/R/is_python_package_with_version_installed.R
index 8b06cb2..36daa26 100644
--- a/R/is_python_package_with_version_installed.R
+++ b/R/is_python_package_with_version_installed.R
@@ -45,6 +45,9 @@ is_python_package_with_version_installed <- function( # nolint indeed a long fun
   python_version = get_default_python_version(),
   verbose = FALSE
 ) {
+   if(!requireNamespace("semver")){
+    stop("'semver' must be installed to use this function: install.packages('semver')")
+  }
   # 'get_installed_python_packages' will use 'python3'
   # or call create_and_activate_conda_env'
   t <- ormr::get_installed_python_packages(