Disallow undefined configs by default.

This brings it in line with other flags, where a malformed value is an error.

RELNOTES(INC): --config=foo will error if no 'foo' config exists.

PiperOrigin-RevId: 191910781

2 files changed, 39 insertions, 7 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/CommonCommandOptions.java b/src/main/java/com/google/devtools/build/lib/runtime/CommonCommandOptions.java
index 4c37fab659..8d520e90cf 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/CommonCommandOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/CommonCommandOptions.java
@@ -107,7 +107,7 @@ public class CommonCommandOptions extends OptionsBase {
 
   @Option(
     name = "allow_undefined_configs",
-    defaultValue = "true",
+    defaultValue = "false",
     documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
     effectTags = {OptionEffectTag.EAGERNESS_TO_EXIT},
     help = "Do not throw an error when the config is not defined."
diff --git a/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java b/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java
index 567499ca7d..d9454bcbbd 100644
--- a/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java
+++ b/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java
@@ -450,15 +450,47 @@ public class BlazeOptionHandlerTest {
   public void testExpandConfigOptions_withConfigForUnapplicableCommand_fixedPoint()
       throws Exception {
     makeFixedPointExpandingConfigOptionHandler();
+    try {
     testExpandConfigOptions_withConfigForUnapplicableCommand();
+      fail();
+    } catch (OptionsParsingException e) {
+      assertThat(e)
+          .hasMessageThat()
+          .contains("Config values are not defined in any .rc file: other");
+    }
+  }
+
+  @Test
+  public void testExpandConfigOptions_withConfigForUnapplicableCommand_inPlace() throws Exception {
+    makeInPlaceExpandingConfigOptionHandler();
+    try {
+      testExpandConfigOptions_withConfigForUnapplicableCommand();
+      fail();
+    } catch (OptionsParsingException e) {
+      assertThat(e).hasMessageThat().contains("Config value other is not defined in any .rc file");
+    }
+  }
+
+  private void testExpandConfigOptions_withConfigForUnapplicableCommand_allowUndefined()
+      throws Exception {
+    parser.parse("--config=other", "--allow_undefined_configs");
+    optionHandler.expandConfigOptions(eventHandler, structuredArgsFrom2SimpleRcsWithOnlyResidue());
+  }
+
+  @Test
+  public void testExpandConfigOptions_withConfigForUnapplicableCommand_allowUndefined_fixedPoint()
+      throws Exception {
+    makeFixedPointExpandingConfigOptionHandler();
+    testExpandConfigOptions_withConfigForUnapplicableCommand_allowUndefined();
     assertThat(eventHandler.getEvents())
         .contains(Event.warn("Config values are not defined in any .rc file: other"));
   }
 
   @Test
-  public void testExpandConfigOptions_withConfigForUnapplicableCommand_inPlace() throws Exception {
+  public void testExpandConfigOptions_withConfigForUnapplicableCommand_allowUndefined_inPlace()
+      throws Exception {
     makeInPlaceExpandingConfigOptionHandler();
-    testExpandConfigOptions_withConfigForUnapplicableCommand();
+    testExpandConfigOptions_withConfigForUnapplicableCommand_allowUndefined();
     assertThat(eventHandler.getEvents())
         .contains(Event.warn("Config value other is not defined in any .rc file"));
   }
@@ -486,8 +518,8 @@ public class BlazeOptionHandlerTest {
         .contains(Event.warn("Config value invalid is not defined in any .rc file"));
   }
 
-  private void testNoAllowUndefinedConfig() throws OptionsParsingException {
-    parser.parse("--config=invalid", "--noallow_undefined_configs");
+  private void testUndefinedConfig() throws OptionsParsingException {
+    parser.parse("--config=invalid");
     optionHandler.expandConfigOptions(eventHandler, ArrayListMultimap.create());
   }
 
@@ -495,7 +527,7 @@ public class BlazeOptionHandlerTest {
   public void testNoAllowUndefinedConfig_fixedPoint() {
     makeFixedPointExpandingConfigOptionHandler();
     try {
-      testNoAllowUndefinedConfig();
+      testUndefinedConfig();
       fail();
     } catch (OptionsParsingException e) {
       assertThat(e)
@@ -508,7 +540,7 @@ public class BlazeOptionHandlerTest {
   public void testNoAllowUndefinedConfig_inPlace() {
     makeInPlaceExpandingConfigOptionHandler();
     try {
-      testNoAllowUndefinedConfig();
+      testUndefinedConfig();
       fail();
     } catch (OptionsParsingException e) {
       assertThat(e)