Various corrections

letsencrypt-auto-source/Dockerfile.centos6

@@ -31,9 +31,9 @@ RUN update-ca-trust
 COPY . /home/lea/certbot/letsencrypt-auto-source
 
 # Tweak uname binary for tests on fake 32bits
-COPY uname_wrapper /bin
+COPY uname_wrapper.sh /bin
 RUN mv /bin/uname /bin/uname_orig \
- && mv /bin/uname_wrapper /bin/uname
+ && mv /bin/uname_wrapper.sh /bin/uname
 
 USER lea
 WORKDIR /home/lea

letsencrypt-auto-source/letsencrypt-auto.template

@@ -552,7 +552,7 @@ if [ "$1" = "--le-auto-phase2" ]; then
     # In this situation, we bypass any bootstrap or certbot venv setup.
     error "Your system is not supported by certbot-auto anymore."
 
-    if [ -f "$VENV_BIN/letsencrypt" ]; then
+    if [ -f "$VENV_BIN/letsencrypt" -a "$INSTALL_ONLY" != 1 ]; then
       error "Certbot will no longer receive updates."
       error "Please visit https://certbot.eff.org/ to check for other alternatives."
       "$VENV_BIN/letsencrypt" "$@"
@@ -688,6 +688,8 @@ UNLIKELY_EOF
   fi
 
   if [ "$INSTALL_ONLY" = 1 ]; then
+    # If you're modifying any of the code after this point in this `if` block, you may
+    # need to update the "$DEPRECATED_OS" = 1 case at the beginning of phase 2 as well.
     say "Certbot is installed."
     exit 0
   fi

letsencrypt-auto-source/tests/uname_wrapper.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 uname_output=$(/bin/uname_orig "$@")