commit d8b80c33dcddf50bcd155c7362c068bf18bcb1d4
author Laurent Le Brun <laurentlb@google.com> Fri Jun 03 14:38:19 2016 +0000
committer Yun Peng <pcloudy@google.com> Mon Jun 06 08:01:16 2016 +0000
tree 65c62b3afed09606cec7ddfb6621978568af02a7
parent 55d55239add4a70e1a549090c4667212007c2110

Make a 'did you mean' suggestion when referencing a non-existent label.

It works for both labels on the command-line and labels in BUILD files.

--
MOS_MIGRATED_REVID=123967347

src/main/java/com/google/devtools/build/lib/packages/Package.java

diff --git a/src/main/java/com/google/devtools/build/lib/packages/Package.java b/src/main/java/com/google/devtools/build/lib/packages/Package.java
index 8a666b0..cbfeb5b 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/Package.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/Package.java
@@ -34,6 +34,7 @@
 import com.google.devtools.build.lib.packages.AttributeMap.AcceptsLabelAttribute;
 import com.google.devtools.build.lib.packages.License.DistributionType;
 import com.google.devtools.build.lib.util.Preconditions;
+import com.google.devtools.build.lib.util.SpellChecker;
 import com.google.devtools.build.lib.vfs.Canonicalizer;
 import com.google.devtools.build.lib.vfs.Path;
 import com.google.devtools.build.lib.vfs.PathFragment;
@@ -528,7 +529,12 @@
       suffix = "; however, a source file of this name exists.  (Perhaps add "
           + "'exports_files([\"" + targetName + "\"])' to " + name + "/BUILD?)";
     } else {
-      suffix = "";
+      String suggestion = SpellChecker.suggest(targetName, targets.keySet());
+      if (suggestion != null) {
+        suffix = " (did you mean '" + suggestion + "'?)";
+      } else {
+        suffix = "";
+      }
     }
 
     throw makeNoSuchTargetException(targetName, suffix);