fix: Respect leading @ when apply fine grained filtering

Author: honnix

MODULE.bazel.lock

@@ -1,9 +1,9 @@
 package com.bazel_diff.bazel
 
 import com.bazel_diff.log.Logger
+import java.util.Calendar
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
-import java.util.Calendar
 
 class BazelClient(
     private val useCquery: Boolean,

cli/src/main/kotlin/com/bazel_diff/bazel/BazelClient.kt

@@ -67,20 +67,15 @@ class SourceFileHasherImpl : KoinComponent, SourceFileHasher {
             val filenameSubstring = name.substring(index)
             Paths.get(filenameSubstring.removePrefix(":").replace(':', '/'))
           } else if (name.startsWith("@")) {
-            val parts =
-                if (name.startsWith("@@")) {
-                  name.substring(2).split("//")
-                } else {
-                  name.substring(1).split("//")
-                }
+            val parts = name.substring(1).split("//")
             if (parts.size != 2) {
               logger.w { "Invalid source label $name" }
               return@sha256
             }
-            val repoName = parts[0]
-            if (repoName !in fineGrainedHashExternalRepos) {
+            if (parts[0] !in fineGrainedHashExternalRepos) {
               return@sha256
             }
+            val repoName = parts[0].removePrefix("@")
             val relativePath = Paths.get(parts[1].removePrefix(":").replace(':', '/'))
             val externalRepoRoot = externalRepoResolver.resolveExternalRepoRoot(repoName)
             externalRepoRoot.resolve(relativePath)