Auto-installs pulumi if it's not available on the user's machine (#59)

* Auto-installs pulumi if it's not available on the user's machine

* Install pulumi in keras-remote HOME

Author: JyotinderSingh

keras_remote/cli/constants.py

@@ -12,6 +12,7 @@
   "KERAS_REMOTE_STATE_DIR",
   os.path.expanduser("~/.keras-remote/pulumi"),
 )
+PULUMI_ROOT = os.path.expanduser("~/.keras-remote/pulumi-cli")
 REQUIRED_APIS = [
   "compute.googleapis.com",
   "cloudbuild.googleapis.com",

keras_remote/cli/infra/stack_manager.py

@@ -2,9 +2,14 @@
 
 import os
 
+import click
 import pulumi.automation as auto
 
-from keras_remote.cli.constants import RESOURCE_NAME_PREFIX, STATE_DIR
+from keras_remote.cli.constants import (
+  PULUMI_ROOT,
+  RESOURCE_NAME_PREFIX,
+  STATE_DIR,
+)
 
 
 def get_stack(program_fn, config):
@@ -19,6 +24,13 @@ def get_stack(program_fn, config):
   """
   os.makedirs(STATE_DIR, exist_ok=True)
 
+  # Auto-install the Pulumi CLI if not already present.
+  try:
+    pulumi_cmd = auto.PulumiCommand(root=PULUMI_ROOT)
+  except Exception:  # noqa: BLE001
+    click.echo("Pulumi CLI not found. Installing...")
+    pulumi_cmd = auto.PulumiCommand.install(root=PULUMI_ROOT)
+
   # Use project ID as stack name so each GCP project gets its own stack
   stack_name = config.project
 
@@ -35,6 +47,7 @@ def get_stack(program_fn, config):
     opts=auto.LocalWorkspaceOptions(
       project_settings=project_settings,
       env_vars={"PULUMI_CONFIG_PASSPHRASE": ""},
+      pulumi_command=pulumi_cmd,
     ),
   )
 

keras_remote/cli/prerequisites_check.py

@@ -2,8 +2,7 @@
 
 Delegates common credential checks (gcloud, auth plugin, ADC) to
 :mod:`keras_remote.credentials` and converts ``RuntimeError`` into
-``click.ClickException``.  CLI-only tool checks (Pulumi, kubectl) remain
-here.
+``click.ClickException``.  CLI-only tool checks (kubectl) remain here.
 """
 
 import shutil
@@ -21,14 +20,6 @@ def check_gcloud():
     raise click.ClickException(str(e))  # noqa: B904
 
 
-def check_pulumi():
-  """Verify Pulumi CLI is installed (required by Automation API)."""
-  if not shutil.which("pulumi"):
-    raise click.ClickException(
-      "Pulumi CLI not found. Install from: https://www.pulumi.com/docs/install/"
-    )
-
-
 def check_kubectl():
   """Verify kubectl is installed."""
   if not shutil.which("kubectl"):
@@ -56,7 +47,6 @@ def check_gcloud_auth():
 def check_all():
   """Run all prerequisite checks."""
   check_gcloud()
-  check_pulumi()
   check_kubectl()
   check_gke_auth_plugin()
   check_gcloud_auth()

keras_remote/cli/prerequisites_check_test.py

@@ -3,56 +3,31 @@
 from unittest import mock
 
 import click
-from absl.testing import absltest, parameterized
+from absl.testing import absltest
 
 from keras_remote.cli.prerequisites_check import (
   check_gcloud,
   check_gcloud_auth,
   check_gke_auth_plugin,
   check_kubectl,
-  check_pulumi,
 )
 
 _MODULE = "keras_remote.cli.prerequisites_check"
 
 
-class TestToolChecks(parameterized.TestCase):
-  """Tests for CLI-only tool checks (pulumi, kubectl)."""
-
-  @parameterized.named_parameters(
-    dict(
-      testcase_name="pulumi",
-      check_fn=check_pulumi,
-      error_match="Pulumi CLI not found",
-    ),
-    dict(
-      testcase_name="kubectl",
-      check_fn=check_kubectl,
-      error_match="kubectl not found",
-    ),
-  )
-  def test_present(self, check_fn, error_match):
-    with mock.patch("shutil.which", return_value="/usr/bin/tool"):
-      check_fn()
-
-  @parameterized.named_parameters(
-    dict(
-      testcase_name="pulumi",
-      check_fn=check_pulumi,
-      error_match="Pulumi CLI not found",
-    ),
-    dict(
-      testcase_name="kubectl",
-      check_fn=check_kubectl,
-      error_match="kubectl not found",
-    ),
-  )
-  def test_missing(self, check_fn, error_match):
+class TestToolChecks(absltest.TestCase):
+  """Tests for CLI-only tool checks (kubectl)."""
+
+  def test_kubectl_present(self):
+    with mock.patch("shutil.which", return_value="/usr/bin/kubectl"):
+      check_kubectl()
+
+  def test_kubectl_missing(self):
     with (
       mock.patch("shutil.which", return_value=None),
-      self.assertRaisesRegex(click.ClickException, error_match),
+      self.assertRaisesRegex(click.ClickException, "kubectl not found"),
     ):
-      check_fn()
+      check_kubectl()
 
 
 class TestDelegatedChecks(absltest.TestCase):