From 50863a9b7636ad68d4cae6b79522e430a7a38fad Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Thu, 17 Oct 2019 14:24:47 -0400
Subject: [PATCH] fix: detect correct python binary to use

Ideally python usage goes away - the dokku-installer should become a mandatory cli command, and the plugin is rewritten in golang - but for now, we need to use the correct binary when running dokku.

Closes #3714
---
 debian/postinst                                  |  6 ++++++
 plugins/scheduler-docker-local/scheduler-inspect | 10 +++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/debian/postinst b/debian/postinst
index de453d037..94257e24c 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -92,6 +92,12 @@ setup-dokku-installer() {
   NGINX_ROOT="/etc/nginx"
   [[ -x /usr/bin/openresty ]] && NGINX_ROOT="/usr/local/openresty/nginx/conf"
 
+  if command -v "python3" &>/dev/null; then
+    sed -i '1 s/^.*$/#!\/usr\/bin\/env python3/' /usr/share/dokku/contrib/dokku-installer.py
+  elif command -v "python2.7" &>/dev/null; then
+    sed -i '1 s/^.*$/#!\/usr\/bin\/env python2.7/' /usr/share/dokku/contrib/dokku-installer.py
+  fi
+
   if [[ -f "$NGINX_ROOT/conf.d/dokku-installer.conf" ]]; then
     echo "Setting up dokku-installer"
     /usr/share/dokku/contrib/dokku-installer.py onboot
diff --git a/plugins/scheduler-docker-local/scheduler-inspect b/plugins/scheduler-docker-local/scheduler-inspect
index c6ef49d06..bb79895ef 100755
--- a/plugins/scheduler-docker-local/scheduler-inspect
+++ b/plugins/scheduler-docker-local/scheduler-inspect
@@ -48,7 +48,15 @@ EOF
   for CONTAINER_FILE in $CONTAINER_FILES; do
     CIDS+="$(<"$DOKKU_ROOT/$APP/$CONTAINER_FILE")"
   done
-  "$DOCKER_BIN" container inspect "${CIDS[@]}" | python2.7 "$TMP_INSPECT_CMD"
+
+  local PYTHON_BIN=python
+  if command -v "python3" &>/dev/null; then
+    PYTHON_BIN=python3
+  elif command -v "python2.7" &>/dev/null; then
+    PYTHON_BIN=python2.7
+  fi
+
+  "$DOCKER_BIN" container inspect "${CIDS[@]}" | "$PYTHON_BIN" "$TMP_INSPECT_CMD"
 
 }