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paulk pushed a commit to branch GROOVY_5_0_X
in repository https://gitbox.apache.org/repos/asf/groovy.git

commit 6b00ab80bd90107c3f16c1b70999910fddd219bd
Author: Mattias Reichel <[email protected]>
AuthorDate: Tue Jan 13 16:56:59 2026 +0100

    GROOVY-11839: feat(groovysh): entry point with binding injection
---
 .../groovy/org/apache/groovy/groovysh/Main.groovy  | 32 +++++++++++++++++----
 .../groovy/groovysh/ProgrammaticStartTest.groovy   | 33 ++++++++++++++++++++++
 2 files changed, 60 insertions(+), 5 deletions(-)

diff --git 
a/subprojects/groovy-groovysh/src/main/groovy/org/apache/groovy/groovysh/Main.groovy
 
b/subprojects/groovy-groovysh/src/main/groovy/org/apache/groovy/groovysh/Main.groovy
index 1aa8308cc2..0ef1b23eed 100644
--- 
a/subprojects/groovy-groovysh/src/main/groovy/org/apache/groovy/groovysh/Main.groovy
+++ 
b/subprojects/groovy-groovysh/src/main/groovy/org/apache/groovy/groovysh/Main.groovy
@@ -290,7 +290,14 @@ class Main {
         }
     }
 
-    static void main(String[] args) {
+    /**
+     * Programmatic entry point for embedding groovysh.
+     *
+     * @param args CLI-like arguments (same as {@link #main(String[])}).
+     * @param initialBindings binding variables for the GroovyEngine
+     * @return process exit code (0 for success)
+     */
+    static int start(String[] args = new String[0], Map<String, ?> 
initialBindings = Collections.emptyMap()) {
         def cli = new CliBuilderInternal(usage: 'groovysh [options] [...]', 
stopAtNonOption: false,
             header: messages['cli.option.header'])
         cli.with {
@@ -311,18 +318,18 @@ class Main {
         OptionAccessor options = cli.parse(args)
 
         if (options == null) {
-            // CliBuilder prints error, but does not exit
-            System.exit(22) // Invalid Args
+            // CliBuilder prints error
+            return 22 // Invalid Args
         }
 
         if (options.h) {
             cli.usage()
-            System.exit(0)
+            return 0
         }
 
         if (options.V) {
             println render(messages.format('cli.info.version', 
GroovySystem.version))
-            System.exit(0)
+            return 0
         }
         String evaluate = options.e ?: null
 
@@ -359,6 +366,15 @@ class Main {
 
             // ScriptEngine and command registries
             GroovyEngine scriptEngine = new GroovyEngine()
+
+            if (initialBindings) {
+                initialBindings.each { k, v ->
+                    if (k != null) {
+                        scriptEngine.put(k, v)
+                    }
+                }
+            }
+
             scriptEngine.put('ROOT', rootURL.toString())
             if (!scriptEngine.hasVariable('CONSOLE_OPTIONS')) {
                 scriptEngine.put('CONSOLE_OPTIONS', [:])
@@ -506,6 +522,12 @@ class Main {
             }
         } catch (Throwable t) {
             t.printStackTrace()
+            return 1
         }
+        return 0
+    }
+
+    static void main(String[] args) {
+        System.exit(start(args))
     }
 }
diff --git 
a/subprojects/groovy-groovysh/src/test/groovy/org/apache/groovy/groovysh/ProgrammaticStartTest.groovy
 
b/subprojects/groovy-groovysh/src/test/groovy/org/apache/groovy/groovysh/ProgrammaticStartTest.groovy
new file mode 100644
index 0000000000..e2542f0463
--- /dev/null
+++ 
b/subprojects/groovy-groovysh/src/test/groovy/org/apache/groovy/groovysh/ProgrammaticStartTest.groovy
@@ -0,0 +1,33 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package org.apache.groovy.groovysh
+
+import groovy.test.GroovyTestCase
+
+/**
+ * Verifies the programmatic API surface exists and is callable.
+ */
+class ProgrammaticStartTest extends GroovyTestCase {
+
+    void testStartMethodIsPresentAndCallable() {
+        // We just verify it accepts parameters and doesn't throw on trivial 
help/version paths.
+        int rc = Main.start(['--help'] as String[], [foo: 1])
+        assert rc == 0
+    }
+}

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