From 418a1b586cec78df237fcdc4cef9bffc9c2f6fa1 Mon Sep 17 00:00:00 2001
From: Jules Villard <jul@fb.com>
Date: Wed, 13 May 2020 08:14:52 -0700
Subject: [PATCH] [opam] do not crash when the switch does not exist

Summary: Fixes #1258.

Reviewed By: martintrojer

Differential Revision: D21548073

fbshipit-source-id: ddb994910
---
 scripts/opam_utils.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/opam_utils.sh b/scripts/opam_utils.sh
index 02d638ad1..2e4ec1eeb 100644
--- a/scripts/opam_utils.sh
+++ b/scripts/opam_utils.sh
@@ -58,8 +58,11 @@ opam_switch_create_if_needed () {
             break
         fi
     done
+    opam_root="${OPAMROOT:-}"
     if [ "$switch_exists" = "no" ]; then
-        rm -rf "$OPAMROOT/$switch"
+        if [ -n "$opam_root" ]; then
+            rm -rf "$opam_root/$switch" || true
+        fi
         opam switch create "$switch" "$compiler"
     fi
 }