chore: allow install smoke previous override

scripts/docker/install-sh-smoke/run.sh

@@ -2,10 +2,15 @@
 set -euo pipefail
 
 INSTALL_URL="${CLAWDBOT_INSTALL_URL:-https://clawd.bot/install.sh}"
+SMOKE_PREVIOUS_VERSION="${CLAWDBOT_INSTALL_SMOKE_PREVIOUS:-}"
+SKIP_PREVIOUS="${CLAWDBOT_INSTALL_SMOKE_SKIP_PREVIOUS:-0}"
 
 echo "==> Resolve npm versions"
 LATEST_VERSION="$(npm view clawdbot version)"
-PREVIOUS_VERSION="$(node - <<'NODE'
+if [[ -n "$SMOKE_PREVIOUS_VERSION" ]]; then
+  PREVIOUS_VERSION="$SMOKE_PREVIOUS_VERSION"
+else
+  PREVIOUS_VERSION="$(node - <<'NODE'
 const { execSync } = require("node:child_process");
 
 const versions = JSON.parse(execSync("npm view clawdbot versions --json", { encoding: "utf8" }));
@@ -16,11 +21,16 @@ const previous = versions.length >= 2 ? versions[versions.length - 2] : versions
 process.stdout.write(previous);
 NODE
 )"
+fi
 
 echo "latest=$LATEST_VERSION previous=$PREVIOUS_VERSION"
 
-echo "==> Preinstall previous (forces installer upgrade path)"
-npm install -g "clawdbot@${PREVIOUS_VERSION}"
+if [[ "$SKIP_PREVIOUS" == "1" ]]; then
+  echo "==> Skip preinstall previous (CLAWDBOT_INSTALL_SMOKE_SKIP_PREVIOUS=1)"
+else
+  echo "==> Preinstall previous (forces installer upgrade path)"
+  npm install -g "clawdbot@${PREVIOUS_VERSION}"
+fi
 
 echo "==> Run official installer one-liner"
 curl -fsSL "$INSTALL_URL" | bash

scripts/test-install-sh-docker.sh

@@ -16,6 +16,8 @@ docker build \
 echo "==> Run installer smoke test (root): $INSTALL_URL"
 docker run --rm -t \
   -e CLAWDBOT_INSTALL_URL="$INSTALL_URL" \
+  -e CLAWDBOT_INSTALL_SMOKE_PREVIOUS="${CLAWDBOT_INSTALL_SMOKE_PREVIOUS:-}" \
+  -e CLAWDBOT_INSTALL_SMOKE_SKIP_PREVIOUS="${CLAWDBOT_INSTALL_SMOKE_SKIP_PREVIOUS:-0}" \
   -e CLAWDBOT_NO_ONBOARD=1 \
   -e DEBIAN_FRONTEND=noninteractive \
   "$SMOKE_IMAGE"