@@ -982,6 +982,29 @@ function _get_package_dir {

     echo "$pkg_dir"

 }

+# Wrapper for ``apt-get update`` to try multiple times on the update

+# to address bad package mirrors (which happen all the time).

+function apt_get_update {

+    # only do this once per run

+    if [[ "$REPOS_UPDATED" == "True" && "$RETRY_UPDATE" != "True" ]]; then

+        return

+    fi

+

+    # bail if we are offline

+    [[ "$OFFLINE" = "True" ]] && return

+

+    local sudo="sudo"

+    [[ "$(id -u)" = "0" ]] && sudo="env"

+

+    local proxies="http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} no_proxy=${no_proxy:-} "

+    local update_cmd="$sudo $proxies apt-get update"

+    if ! timeout 300 sh -c "while ! $update_cmd; do sleep 30; done"; then

+        die $LINENO "Failed to update apt repos, we're dead now"

+    fi

+

+    REPOS_UPDATED=True

+}

+

 # Wrapper for ``apt-get`` to set cache and proxy environment variables

 # Uses globals ``OFFLINE``, ``*_proxy``

 # apt_get operation package [package ...]

@@ -1148,15 +1171,7 @@ function update_package_repo {

     fi

     if is_ubuntu; then

-        local xtrace=$(set +o | grep xtrace)

-        set +o xtrace

-        if [[ "$REPOS_UPDATED" != "True" || "$RETRY_UPDATE" = "True" ]]; then

-            # if there are transient errors pulling the updates, that's fine.

-            # It may be secondary repositories that we don't really care about.

-            apt_get update  || /bin/true

-            REPOS_UPDATED=True

-        fi

-        $xtrace

+        apt_get_update

     fi

 }