Add script to check for R

kgryte · kgryte · commit dad23957d0b0 · 2017-03-08T23:00:28.000-08:00
diff --git a/tools/scripts/check_r b/tools/scripts/check_r
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+#
+# Check whether R is installed.
+#
+# Usage: check_r
+#
+
+# VARIABLES #
+
+# Find R:
+R=$(which r 2>/dev/null)
+
+
+# FUNCTIONS #
+
+# Prints usage information.
+usage() {
+	echo '' >&2
+	echo 'Usage: check_r' >&2
+	echo '' >&2
+}
+
+# MAIN #
+
+if [[ -x "${R}" ]] && "${R}" --version >/dev/null; then
+	echo 'R is installed.' >&2
+	exit 0
+else
+	echo 'ERROR: missing dependency. Please download R version >= 3.0.0 (https://www.r-project.org/). Once installed, run the command again.' >&2
+	exit 1
+fi
+
+# TODO: check for minimum version
