[buildout] Don't wait for user confirmation on the CI

buildout_pull_images.sh

@@ -30,13 +30,25 @@ if [ ${#MISSING_IMAGES[@]} -gt 0 ]; then
     done
     echo
 
-    read -p "Do you want to install them now? (yes/no) " -n 1 -r
-    echo
+    MUST_PULL=0
+
+    if [ -z "$CI_SERVER" ]; then
+        read -p "Do you want to install them now? (yes/no) " -n 1 -r
+        echo
+
+        if [[ $REPLY =~ ^[Yy]$ ]]; then
+            MUST_PULL=1
+        fi
+    else
+        MUST_PULL=1
+    fi
 
-    if [[ $REPLY =~ ^[Yy]$ ]]; then
+    if [ $MUST_PULL -eq 1 ]; then
         # Log in the registry if needed
-        if ! grep -q "docker.idiap.ch" ~/.docker/config.json ; then
-            docker login docker.idiap.ch
+        if [ -z "$CI_SERVER" ]; then
+            if ! grep -q "docker.idiap.ch" ~/.docker/config.json ; then
+                docker login docker.idiap.ch
+            fi
         fi
 
         # Pull the images