Fixed #58 : Add an option to set environment variables before spawining a process

src/main/java/rife/bld/operations/AbstractProcessOperation.java

@@ -11,7 +11,9 @@ import rife.tools.exceptions.FileUtilsErrorException;
 
 import java.io.*;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.function.Function;
 
 /**
@@ -24,6 +26,7 @@ public abstract class AbstractProcessOperation<T extends AbstractProcessOperatio
     public static final String DEFAULT_JAVA_TOOL = "java";
 
     protected File workDirectory_ = new File(System.getProperty("user.dir"));
+    protected final Map<String, String> environment_ = new HashMap<>();
     protected String javaTool_ = DEFAULT_JAVA_TOOL;
     protected final JavaOptions javaOptions_ = new JavaOptions();
     protected final List<String> classpath_ = new ArrayList<>();
@@ -87,6 +90,10 @@ public abstract class AbstractProcessOperation<T extends AbstractProcessOperatio
         var builder = new ProcessBuilder(executeConstructProcessCommandList());
         builder.directory(workDirectory());
 
+        if (!environment_.isEmpty()) {
+            builder.environment().putAll(environment_);
+        }
+
         builder.redirectInput(ProcessBuilder.Redirect.INHERIT);
 
         final var output_processor = outputProcessor();
@@ -163,6 +170,18 @@ public abstract class AbstractProcessOperation<T extends AbstractProcessOperatio
         return (T) this;
     }
 
+    /**
+     * Provides environment variable entries to use for the operation.
+     *
+     * @param environment environment entries for the operation
+     * @return this operation instance
+     * @since 2.2.1
+     */
+    public T environment(Map<String, String> environment) {
+        environment_.putAll(environment);
+        return (T) this;
+    }
+
     /**
      * Provides the name of the tool to use for {@code java} execution.
      * <p>
@@ -303,6 +322,18 @@ public abstract class AbstractProcessOperation<T extends AbstractProcessOperatio
         return workDirectory_;
     }
 
+    /**
+     * Retrieves the environment to use for the operation.
+     * <p>
+     * This is a modifiable map that can be retrieved and changed.
+     *
+     * @return the operation's environment
+     * @since 2.2.1
+     */
+    public Map<String, String> environment() {
+        return environment_;
+    }
+
     /**
      * retrieves the name of the tool to use for {@code java} execution.
      *

src/test/java/rife/bld/operations/TestRunOperation.java

@@ -11,6 +11,7 @@ import rife.tools.FileUtils;
 import java.io.File;
 import java.nio.file.Files;
 import java.util.List;
+import java.util.Map;
 import java.util.function.Function;
 import java.util.jar.Attributes;
 
@@ -24,6 +25,7 @@ public class TestRunOperation {
         assertTrue(operation.workDirectory().exists());
         assertTrue(operation.workDirectory().isDirectory());
         assertTrue(operation.workDirectory().canWrite());
+        assertTrue(operation.environment().isEmpty());
         assertEquals("java", operation.javaTool());
         assertTrue(operation.javaOptions().isEmpty());
         assertTrue(operation.classpath().isEmpty());
@@ -38,6 +40,7 @@ public class TestRunOperation {
     @Test
     void testPopulation()
     throws Exception {
+        var environment = Map.of("env1", "val1", "env2", "val2", "env3", "val3");
         var work_directory = Files.createTempDirectory("test").toFile();
         try {
             var java_tool = "javatool";
@@ -55,6 +58,7 @@ public class TestRunOperation {
             var operation1 = new RunOperation();
             operation1
                 .workDirectory(work_directory)
+                .environment(environment)
                 .javaTool(java_tool)
                 .javaOptions(List.of(run_java_option1, run_java_option2))
                 .classpath(List.of(run_classpath1, run_classpath2))
@@ -65,6 +69,7 @@ public class TestRunOperation {
                 .errorProcessor(run_error_consumer);
 
             assertEquals(work_directory, operation1.workDirectory());
+            assertEquals(environment, operation1.environment());
             assertEquals(java_tool, operation1.javaTool());
             assertTrue(operation1.javaOptions().contains(run_java_option1));
             assertTrue(operation1.javaOptions().contains(run_java_option2));
@@ -79,6 +84,7 @@ public class TestRunOperation {
 
             var operation2 = new RunOperation();
             operation2.workDirectory(work_directory);
+            operation2.environment(environment);
             operation2.javaTool(java_tool);
             operation2.javaOptions().add(run_java_option1);
             operation2.javaOptions().add(run_java_option2);
@@ -92,6 +98,7 @@ public class TestRunOperation {
             operation2.errorProcessor(run_error_consumer);
 
             assertEquals(work_directory, operation2.workDirectory());
+            assertEquals(environment, operation2.environment());
             assertEquals(java_tool, operation2.javaTool());
             assertTrue(operation2.javaOptions().contains(run_java_option1));
             assertTrue(operation2.javaOptions().contains(run_java_option2));
@@ -129,7 +136,7 @@ public class TestRunOperation {
                 public class Source1 {
                     public final String name_;
                     public Source1() {
-                        name_ = "source1";
+                        name_ = System.getenv("execute_name");
                     }
                     
                     public static void main(String[] arguments)
@@ -149,6 +156,7 @@ public class TestRunOperation {
 
             var output = new StringBuilder();
             var run_operation = new RunOperation()
+                .environment(Map.of("execute_name", "source1"))
                 .mainClass("Source1")
                 .classpath(List.of(build_main.getAbsolutePath()))
                 .outputProcessor(s -> {