Re-enabling passing -sourcepath via javacopts.

This is needed until java_common.compile will be strong enough to replace
java_library, exposing all its features.

PiperOrigin-RevId: 155773169

src/java_tools/buildjar/java/com/google/devtools/build/buildjar/OptionsParser.java

@@ -27,6 +27,7 @@
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -110,6 +111,7 @@ private void processCommandlineArgs(Deque<String> argQueue) throws InvalidComman
           // otherwise we have to do something like adding a "--"
           // terminator to the passed arguments.
           collectFlagArguments(javacOpts, argQueue, "--");
+          sourcePathFromJavacOpts();
           break;
         case "--direct_dependency":
           {
@@ -220,6 +222,18 @@ private void processCommandlineArgs(Deque<String> argQueue) throws InvalidComman
     }
   }
 
+  private void sourcePathFromJavacOpts() {
+    Iterator<String> it = javacOpts.iterator();
+    while (it.hasNext()) {
+      String curr = it.next();
+      if (curr.equals("-sourcepath") && it.hasNext()) {
+        it.remove();
+        sourcePath = it.next();
+        it.remove();
+      }
+    }
+  }
+
   private JarOwner parseJarOwner(String line) {
     List<String> ownerStringParts = SPACE_SPLITTER.splitToList(line);
     JarOwner owner;

src/test/shell/bazel/bazel_java_test.sh

@@ -105,6 +105,42 @@ function test_build_hello_world() {
   bazel build //java/main:main &> $TEST_log || fail "build failed"
 }
 
+function test_build_with_sourcepath() {
+  mkdir -p g
+  cat >g/A.java <<'EOF'
+package g;
+public class A {
+   public A() {
+      new B();
+   }
+}
+EOF
+
+  cat >g/B.java <<'EOF'
+package g;
+public class B {
+   public B() {
+   }
+}
+EOF
+
+  cat >g/BUILD <<'EOF'
+genrule(
+  name = "stub",
+  srcs = ["B.java"],
+  outs = ["B.jar"],
+  cmd = "zip $@ $(SRCS)",
+)
+java_library(
+  name = "test",
+  srcs = ["A.java"],
+  javacopts = ["-sourcepath $(GENDIR)/$(location :stub)", "-implicit:none"],
+  deps = [":stub"]
+)
+EOF
+  bazel build //g:test >$TEST_log || fail "Failed to build //g:test"
+}
+
  function test_java_common_compile_sourcepath() {
    # TODO(bazel-team): Enable this for Java 7 when VanillaJavaBuilder supports --sourcepath.
    JAVA_VERSION="1.$(bazel query  --output=build '@bazel_tools//tools/jdk:toolchain' | grep source_version | cut -d '"' -f 2)"