Automated rollback of commit d2f1971.

*** Reason for rollback ***

This regressed support for non-ASCII characters in paths on systems that don't support C.UTF-8, see b/372094587

*** Original change description ***

Use `C.UTF-8` instead of `en_US.UTF-8` locale for Java compilation

`C.UTF-8` is now the universally accepted standard UTF-8 locale, to the point where some minimal distributions no longer ship with `en_US.UTF-8` (e.g. RHEL 9 with `glibc-minimal`). CentOS 7, the only major distribution that doesn't have the locale, is EOL now.

Note that the locale can't be detected automatically since the action may run on a machine that isn't the host....

***

PiperOrigin-RevId: 683672854
Change-Id: I6c1d4fe43066c068db345987f54388c6fcdd0539

src/main/java/com/google/devtools/build/lib/rules/java/JavaCompileActionBuilder.java

@@ -53,7 +53,7 @@ public final class JavaCompileActionBuilder {
 
   /** Environment variable that sets the UTF-8 charset. */
   static final ImmutableMap<String, String> UTF8_ENVIRONMENT =
-      ImmutableMap.of("LC_CTYPE", "C.UTF-8");
+      ImmutableMap.of("LC_CTYPE", "en_US.UTF-8");
 
   static final String MNEMONIC = "Javac";
 

src/test/java/com/google/devtools/build/lib/rules/java/JavaCompileActionBuilderTest.java

@@ -150,7 +150,8 @@ public void testLocale() throws Exception {
         """);
     JavaCompileAction action =
         (JavaCompileAction) getGeneratingActionForLabel("//java/com/google/test:liba.jar");
-    assertThat(action.getIncompleteEnvironmentForTesting()).containsEntry("LC_CTYPE", "C.UTF-8");
+    assertThat(action.getIncompleteEnvironmentForTesting())
+        .containsEntry("LC_CTYPE", "en_US.UTF-8");
   }
 
   @Test