Print warning if deprecated --include-python flag is given

packages/safe-chain/src/config/cliArguments.js

@@ -1,3 +1,5 @@
+import { ui } from "../environment/userInteraction.js";
+
 /**
  * @type {{loggingLevel: string | undefined, skipMinimumPackageAge: boolean | undefined, minimumPackageAgeHours: string | undefined}}
  */
@@ -33,7 +35,7 @@ export function initializeCliArguments(args) {
   setLoggingLevel(safeChainArgs);
   setSkipMinimumPackageAge(safeChainArgs);
   setMinimumPackageAgeHours(safeChainArgs);
-
+  checkDeprecatedPythonFlag(args);
   return remainingArgs;
 }
 
@@ -120,3 +122,18 @@ function hasFlagArg(args, flagName) {
   }
   return false;
 }
+
+/**
+ * Emits a deprecation warning for legacy --include-python flag
+ *
+ * @param {string[]} args
+ * @returns {void}
+ */
+export function checkDeprecatedPythonFlag(args) {
+  if (!Array.isArray(args)) return;
+  if (args.includes("--include-python")) {
+    ui.writeWarning(
+      "--include-python is deprecated and ignored. Python tooling is included by default."
+    );
+  }
+}

packages/safe-chain/src/config/cliArguments.spec.js

@@ -6,6 +6,7 @@ import {
   getSkipMinimumPackageAge,
   getMinimumPackageAgeHours,
 } from "./cliArguments.js";
+import { ui } from "../environment/userInteraction.js";
 
 describe("initializeCliArguments", () => {
   it("should return all args when no safe-chain args are present", () => {
@@ -271,4 +272,40 @@ describe("initializeCliArguments", () => {
 
     assert.strictEqual(getMinimumPackageAgeHours(), "-24");
   });
+
+  it("should warn on deprecated --include-python for setup", () => {
+    const warnings = [];
+    const originalWriteWarning = ui.writeWarning;
+    ui.writeWarning = (msg, ...rest) => {
+      warnings.push(String(msg));
+    };
+    try {
+      const argv = ["node", "safe-chain", "setup", "--include-python"];
+      initializeCliArguments(argv);
+      assert.ok(
+        warnings.some((m) => m.includes("--include-python is deprecated")),
+        "Expected a deprecation warning for --include-python in setup"
+      );
+    } finally {
+      ui.writeWarning = originalWriteWarning;
+    }
+  });
+
+  it("should warn on deprecated --include-python for setup-ci", () => {
+    const warnings = [];
+    const originalWriteWarning = ui.writeWarning;
+    ui.writeWarning = (msg, ...rest) => {
+      warnings.push(String(msg));
+    };
+    try {
+      const argv = ["node", "safe-chain", "setup-ci", "--include-python"];
+      initializeCliArguments(argv);
+      assert.ok(
+        warnings.some((m) => m.includes("--include-python is deprecated")),
+        "Expected a deprecation warning for --include-python in setup-ci"
+      );
+    } finally {
+      ui.writeWarning = originalWriteWarning;
+    }
+  });
 });