From fc659a9a7b55aa8cf496e749ed463c22eb4acbdb Mon Sep 17 00:00:00 2001
From: Brad Warren <bmw@eff.org>
Date: Fri, 2 Mar 2018 17:13:39 -0800
Subject: [PATCH] don't error when we don't have requirements

---
 tools/pip_install.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/pip_install.sh b/tools/pip_install.sh
index 726a930f7..648af3c26 100755
--- a/tools/pip_install.sh
+++ b/tools/pip_install.sh
@@ -19,6 +19,10 @@ if [ "$CERTBOT_OLDEST" = 1 ]; then
     # remove any extras such as [dev]
     pkg_dir=$(echo $2 | cut -f1 -d\[)  # remove any extras such as [dev]
     requirements="$pkg_dir/local-oldest-requirements.txt"
+    # packages like acme don't have any local oldest requirements
+    if [ ! -f "$requirements" ]; then
+        unset requirements
+    fi
     cp "$tools_dir/oldest_constraints.txt" "$test_constraints"
 else
     repo_root=$(dirname "$tools_dir")