Add .use_mise to use mise in CI

Author: burmudar

.buildkite/hooks/asdf-pre-command

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# this script is executed by multiple buildkite agents running on one node, so we write the pid to a file
+# if the pidfile exists we know another process is executing so we don't need to install anything
+#
+# A more robust approach would be to use a lock file, but that would require some more work
+set -eu
+pushd "$(dirname "${BASH_SOURCE[0]}")"/../..
+
+WORKDIR=$(pwd)
+PIDFILE=/var/lock/dobackup.pid
+
+remove_pidfile()
+{
+  rm -f "$PIDFILE"
+}
+
+another_instance()
+{
+  echo "There is another instance running, skipping"
+  exit 0
+}
+
+if [ -f "$PIDFILE" ]; then
+  kill -0 "$(cat $PIDFILE)" && another_instance
+fi
+trap remove_pidfile EXIT
+echo $$ > "$PIDFILE"
+
+echo "Installing asdf dependencies as defined in '${WORKDIR}/.tool-versions':"
+asdf install

.buildkite/hooks/pre-command

@@ -1,30 +1,11 @@
 #!/usr/bin/env bash
-# this script is executed by multiple buildkite agents running on one node, so we write the pid to a file
-# if the pidfile exists we know another process is executing so we don't need to install anything
-#
-# A more robust approach would be to use a lock file, but that would require some more work
-set -eu
-pushd "$(dirname "${BASH_SOURCE[0]}")"/../..
-
-WORKDIR=$(pwd)
-PIDFILE=/var/lock/dobackup.pid
-
-remove_pidfile()
-{
-  rm -f "$PIDFILE"
-}
-
-another_instance()
-{
-  echo "There is another instance running, skipping"
+# Skip the rest if this is pipeline upload or empty
+if [[ "${BUILDKITE_COMMAND:-}" =~ "buildkite-agent pipeline upload".* ]]; then
+  exit 0
+elif [[ "${BUILDKITE_COMMAND:-}" = "" ]]; then
   exit 0
-}
-
-if [ -f "$PIDFILE" ]; then
-  kill -0 "$(cat $PIDFILE)" && another_instance
 fi
-trap remove_pidfile EXIT
-echo $$ > "$PIDFILE"
 
-echo "Installing asdf dependencies as defined in '${WORKDIR}/.tool-versions':"
-asdf install
+if [ ! -f .use_mise ]; then
+  source ./asdf-pre-command
+fi

.use_mise

@@ -0,0 +1,6 @@
+Stateless CI agents use the presence of this file to determine whether it should install tools with mise or install them with ASDF.
+Thus if you delete this file, CI will use ASDF to install tools and not mise.
+
+The file is only meant to be here while we transition to using mise completely.
+
+For more information you can reach out to the dev-infra team on #discuss-dev-infra.