From 0d6181521e12822159220de4e2fe51c07732535f Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Thu, 10 Apr 2014 14:25:17 +0200
Subject: [PATCH] versions for file type detectors + usage of them for file
 type index

---
 .../com/intellij/openapi/fileTypes/FileTypeRegistry.java    | 2 ++
 .../src/com/intellij/psi/search/FileTypeIndex.java          | 6 ++++++
 .../plugins/groovy/GroovyHashBangFileTypeDetector.java      | 5 +++++
 python/src/com/jetbrains/python/PyFileTypeDetector.java     | 5 +++++
 4 files changed, 18 insertions(+)

diff --git a/platform/core-api/src/com/intellij/openapi/fileTypes/FileTypeRegistry.java b/platform/core-api/src/com/intellij/openapi/fileTypes/FileTypeRegistry.java
index e1a52796e1e9..2fd9e8b1a5e1 100644
--- a/platform/core-api/src/com/intellij/openapi/fileTypes/FileTypeRegistry.java
+++ b/platform/core-api/src/com/intellij/openapi/fileTypes/FileTypeRegistry.java
@@ -102,5 +102,7 @@ public abstract class FileTypeRegistry {
      */
     @Nullable
     FileType detect(@NotNull VirtualFile file, @NotNull ByteSequence firstBytes, @Nullable CharSequence firstCharsIfText);
+
+    int getVersion();
   }
 }
diff --git a/platform/indexing-impl/src/com/intellij/psi/search/FileTypeIndex.java b/platform/indexing-impl/src/com/intellij/psi/search/FileTypeIndex.java
index 94388d0d2558..850fc5a119c7 100644
--- a/platform/indexing-impl/src/com/intellij/psi/search/FileTypeIndex.java
+++ b/platform/indexing-impl/src/com/intellij/psi/search/FileTypeIndex.java
@@ -15,6 +15,7 @@
  */
 package com.intellij.psi.search;
 
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.fileTypes.FileTypeRegistry;
 import com.intellij.openapi.util.Comparing;
@@ -87,6 +88,11 @@ public class FileTypeIndex extends ScalarIndexExtension<FileType>
     for (FileType type : types) {
       version += type.getName().hashCode();
     }
+
+    version *= 31;
+    for (FileTypeRegistry.FileTypeDetector detector : Extensions.getExtensions(FileTypeRegistry.FileTypeDetector.EP_NAME)) {
+      version += detector.getVersion();
+    }
     return version;
   }
 
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/GroovyHashBangFileTypeDetector.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/GroovyHashBangFileTypeDetector.java
index 66dc63d6e1ff..e641ffc1cda6 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/GroovyHashBangFileTypeDetector.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/GroovyHashBangFileTypeDetector.java
@@ -36,4 +36,9 @@ public class GroovyHashBangFileTypeDetector implements FileTypeRegistry.FileType
 
     return null;
   }
+
+  @Override
+  public int getVersion() {
+    return 1;
+  }
 }
diff --git a/python/src/com/jetbrains/python/PyFileTypeDetector.java b/python/src/com/jetbrains/python/PyFileTypeDetector.java
index 9eaaf7ae7c5a..13506afe2f32 100644
--- a/python/src/com/jetbrains/python/PyFileTypeDetector.java
+++ b/python/src/com/jetbrains/python/PyFileTypeDetector.java
@@ -31,4 +31,9 @@ public class PyFileTypeDetector implements FileTypeRegistry.FileTypeDetector {
   public FileType detect(@NotNull VirtualFile file, @NotNull ByteSequence firstBytes, @Nullable CharSequence firstCharsIfText) {
     return FileUtil.isHashBangLine(firstCharsIfText, "python") ? PythonFileType.INSTANCE : null;
   }
+
+  @Override
+  public int getVersion() {
+    return 1;
+  }
 }