devtool: stop asking for user confirmation on container pull

Whenever devtool notices that its container is not cached locally, it
requests user input to confirm the new devctr version should indeed be
downloaded. In practice, I do not remember ever saying "no" here. On the
other hand, forgetting to explicitly disable these confirmations in
buildkite pipelines has lead to a myriad of "stuck pipeline" issues.
Thus, remove this confirmation step altogether, as it does more harm
than good.

To avoid having to fix all pipelines that do pass `-y` today, simply
treat the `-y` parameter as a no-op (suggested by Pablo, thanks!).

We cannot remove get_user_confirmation altogether, as its also used by
some of the release scripts, and there it seems like a valid usecase
(but these scripts we never run in buildkite).

Signed-off-by: Patrick Roy <[email protected]>

tools/devtool

@@ -127,10 +127,6 @@ PRIV_KEY_PATH=/root/.ssh/id_rsa
 # Path to the linux kernel directory, as bind-mounted in the container.
 CTR_KERNEL_DIR="${CTR_FC_ROOT_DIR}/.kernel"
 
-# Global options received by $0
-# These options are not command-specific, so we store them as global vars
-OPT_UNATTENDED=false
-
 # Get the target prefix to avoid repeated calls to uname -m
 TARGET_PREFIX="$(uname -m)-unknown-linux-"
 
@@ -195,7 +191,6 @@ ensure_devctr() {
     # download it, if we don't.
     [[ $(docker images -q "$DEVCTR_IMAGE" | wc -l) -gt 0 ]] || {
         say "About to pull docker image $DEVCTR_IMAGE"
-        get_user_confirmation || die "Aborted."
 
         # Run docker pull 5 times in case it fails - sleep 3 seconds
         # between attempts
@@ -1235,7 +1230,8 @@ main() {
     while [ $# -gt 0 ]; do
         case "$1" in
             -h|--help)              { cmd_help; exit 1;     } ;;
-            -y|--unattended)        { OPT_UNATTENDED=true;  } ;;
+            -y|--unattended)        # purposefully ignored
+                ;;
             -*)
                 die "Unknown arg: $1. Please use \`$0 help\` for help."
             ;;

tools/functions

@@ -71,12 +71,7 @@ function SGR {
 #   exit code 0 for successful confirmation
 #   exit code != 0 if the user declined
 #
-OPT_UNATTENDED=false
 get_user_confirmation() {
-
-    # Pass if running unattended
-    [[ "$OPT_UNATTENDED" = true ]] && return 0
-
     # Fail if STDIN is not a terminal (there's no user to confirm anything)
     [[ -t 0 ]] || return 1