Fix "outside repository" error when "git lfs track" in a symlinked dir

commands/command_track.go

@@ -62,8 +62,13 @@ ArgsLoop:
 		absT, relT := absRelPath(t, wd)
 
 		if !filepath.HasPrefix(absT, lfs.LocalWorkingDir) {
-			Print("%s is outside repository", t)
-			os.Exit(128)
+			// check symlinks; LocalWorkingDir has symlinks resolved by rev-parse
+			// have to resolve dir without track pattern
+			actualDirT, err := filepath.EvalSymlinks(filepath.Dir(absT))
+			if err != nil || !filepath.HasPrefix(actualDirT, lfs.LocalWorkingDir) {
+				Print("%s is outside repository", t)
+				os.Exit(128)
+			}
 		}
 
 		for _, k := range knownPaths {

test/test-track.sh

@@ -215,3 +215,20 @@ begin_test "track in gitDir"
   exit 1
 )
 end_test
+
+begin_test "track in symlinked dir"
+(
+  set -e
+
+  git init track-symlinkdst
+  ln -s track-symlinkdst track-symlinksrc
+  cd track-symlinksrc
+
+  git lfs track "*.png"
+  grep "^*.png" .gitattributes || {
+    echo ".gitattributes doesn't contain the expected relative path *.png:"
+    cat .gitattributes
+    exit 1
+  }
+)
+end_test