From 7cd52a3c8be66090a25dd0feb4db5661a3ba2cb2 Mon Sep 17 00:00:00 2001
From: Jeremy Nimmer <jeremy.nimmer@tri.global>
Date: Mon, 27 Apr 2026 14:39:46 -0700
Subject: [PATCH] bazelisk.py supports bazeliskVersion

Also add missing regression test of the Go implementation.
---
 bazelisk.py      |  4 ++++
 bazelisk_test.sh | 20 +++++++++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/bazelisk.py b/bazelisk.py
index e182c643..d510f3a0 100755
--- a/bazelisk.py
+++ b/bazelisk.py
@@ -523,6 +523,10 @@ def main(argv=None):
     if argv is None:
         argv = sys.argv
 
+    if argv[1:] == ["bazeliskVersion"]:
+        print("Bazelisk version: Python")
+        return 0
+
     bazel_path = get_bazel_path()
 
     argv = argv[1:]
diff --git a/bazelisk_test.sh b/bazelisk_test.sh
index d5c9458e..d9ea9ba9 100755
--- a/bazelisk_test.sh
+++ b/bazelisk_test.sh
@@ -36,7 +36,7 @@ else
 fi
 # --- end runfiles.bash initialization ---
 
-BAZELISK_VERSION=$1
+BAZELISK_TEST_LANG=$1  # One of "GO", "PY", or "PY3".
 shift 1
 
 # TODO: only the Python version reads bazelbuild-releases.json since it uses
@@ -65,7 +65,7 @@ function setup() {
 
 function bazelisk() {
   if [[ -n $(rlocation _main/bazelisk.py) ]]; then
-    if [[ $BAZELISK_VERSION == "PY3" ]]; then
+    if [[ $BAZELISK_TEST_LANG == "PY3" ]]; then
       echo "Running Bazelisk with $(python3 -V)..."
       python3 "$(rlocation _main/bazelisk.py)" "$@"
     else
@@ -95,6 +95,16 @@ function bazelisk() {
   fi
 }
 
+function test_bazelisk_version() {
+  setup
+
+  BAZELISK_HOME="$BAZELISK_HOME" \
+      bazelisk bazeliskVersion 2>&1 | tee log
+
+  grep "Bazelisk version: " log || \
+      (echo "FAIL: Expected to find 'Bazelisk version' in the output of 'bazelisk bazeliskVersion'"; exit 1)
+}
+
 function test_bazel_version_py() {
   setup
 
@@ -517,6 +527,10 @@ function test_bazel_prepend_binary_directory_to_path_py() {
       (echo "FAIL: Expected PATH to contains bazel binary directory."; exit 1)
 }
 
+echo "# test_bazelisk_version"
+test_bazelisk_version
+echo
+
 echo "# test_bazel_version_from_environment"
 test_bazel_version_from_environment
 echo
@@ -541,7 +555,7 @@ echo "# test_BAZELISK_NOJDK"
 test_BAZELISK_NOJDK
 echo
 
-if [[ $BAZELISK_VERSION == "GO" ]]; then
+if [[ $BAZELISK_TEST_LANG == "GO" ]]; then
   echo "# test_bazel_version_go"
   test_bazel_version_go
   echo