From 9a08c0964227a1a999fa4cb42f63a355df0804fc Mon Sep 17 00:00:00 2001
From: Brad Warren <bmw@eff.org>
Date: Fri, 2 Mar 2018 15:52:37 -0800
Subject: [PATCH] Use per package requirements files

---
 tools/pip_install.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/pip_install.sh b/tools/pip_install.sh
index d2aae4a43..7836457bf 100755
--- a/tools/pip_install.sh
+++ b/tools/pip_install.sh
@@ -9,11 +9,17 @@
 tools_dir=$(dirname $("$(dirname $0)/readlink.py" $0))
 dev_constraints="$tools_dir/dev_constraints.txt"
 merge_reqs="$tools_dir/merge_requirements.py"
+requirements=""
 test_constraints=$(mktemp)
 trap "rm -f $test_constraints" EXIT
 
 if [ "$CERTBOT_OLDEST" = 1 ]; then
+    if [ "$1" != "-e" -o "$#" -ne "2" ]; then
+        echo "When CERTBOT_OLDEST is set, this script must be run with a single -e <path> argument."
+        exit 1
+    fi
     cp "$tools_dir/oldest_constraints.txt" "$test_constraints"
+    requirements="-r$2/local-oldest-requirements.txt"
 else
     repo_root=$(dirname "$tools_dir")
     certbot_requirements="$repo_root/letsencrypt-auto-source/pieces/dependency-requirements.txt"
@@ -23,4 +29,4 @@ fi
 set -x
 
 # install the requested packages using the pinned requirements as constraints
-pip install -q --constraint <("$merge_reqs" "$dev_constraints" "$test_constraints") "$@"
+pip install -q --constraint <("$merge_reqs" "$dev_constraints" "$test_constraints") $requirements "$@"