diff --git a/src/main/java/com/google/devtools/build/lib/cmdline/Label.java b/src/main/java/com/google/devtools/build/lib/cmdline/Label.java
index 3f72641..454dfe8 100644
--- a/src/main/java/com/google/devtools/build/lib/cmdline/Label.java
+++ b/src/main/java/com/google/devtools/build/lib/cmdline/Label.java
@@ -447,6 +447,18 @@
         + name;
   }
 
+  /** Return the name of the repository label refers to without the leading `at` symbol. */
+  @SkylarkCallable(
+      name = "workspace_name",
+      structField = true,
+      doc =
+          "The repository part of this label. For isntance, "
+              + "<pre class=language-python>Label(\"@foo//bar:baz\").workspace_name"
+              + " == \"foo\"</pre>")
+  public String getWorkspaceName() {
+    return packageIdentifier.getRepository().strippedName();
+  }
+
   /**
    * Renders this label in canonical form, except with labels in the main and default repositories
    * conflated.
diff --git a/src/test/java/com/google/devtools/build/lib/cmdline/LabelTest.java b/src/test/java/com/google/devtools/build/lib/cmdline/LabelTest.java
index 6ea333f..ea74305 100644
--- a/src/test/java/com/google/devtools/build/lib/cmdline/LabelTest.java
+++ b/src/test/java/com/google/devtools/build/lib/cmdline/LabelTest.java
@@ -481,4 +481,12 @@
     assertThat(Label.getContainingDirectory(Label.parseAbsoluteUnchecked("//a/b/c")))
         .isEqualTo(PathFragment.create("a/b/c"));
   }
+
+  @Test
+  public void testWorkspaceName() throws Exception {
+    assertThat(Label.parseAbsolute("@foo//bar:baz", ImmutableMap.of()).getWorkspaceName())
+        .isEqualTo("foo");
+    assertThat(Label.parseAbsolute("//bar:baz", ImmutableMap.of()).getWorkspaceName()).isEmpty();
+    assertThat(Label.parseAbsolute("@//bar:baz", ImmutableMap.of()).getWorkspaceName()).isEmpty();
+  }
 }