Add .use_mise to use mise in CI

Author: burmudar

.buildkite/hooks/asdf-pre-command

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -eu
+pushd "$(dirname "${BASH_SOURCE[0]}")"/../..
+
+TOOL_VERSION_FILES=()
+mapfile -d $'\0' TOOL_VERSION_FILES < <(fd .tool-versions --hidden --absolute-path --print0)
+
+for file in "${TOOL_VERSION_FILES[@]}"; do
+	echo "Installing asdf dependencies as defined in ${file}:"
+	parent=$(dirname "${file}")
+	pushd "${parent}"
+
+	asdf install
+
+	popd
+done
+
+popd

.buildkite/hooks/pre-command

@@ -1,19 +1,11 @@
 #!/usr/bin/env bash
-
-set -eu
-pushd "$(dirname "${BASH_SOURCE[0]}")"/../..
-
-TOOL_VERSION_FILES=()
-mapfile -d $'\0' TOOL_VERSION_FILES < <(fd .tool-versions --hidden --absolute-path --print0)
-
-for file in "${TOOL_VERSION_FILES[@]}"; do
-	echo "Installing asdf dependencies as defined in ${file}:"
-	parent=$(dirname "${file}")
-	pushd "${parent}"
-
-	asdf install
-
-	popd
-done
-
-popd
+# 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
+fi
+
+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.