Handle .editorconfig parse error

src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala

@@ -318,7 +318,7 @@ trait RepositoryViewerControllerBase extends ControllerBase {
         getPathObjectId(git, path, revCommit).map {
           objectId =>
             val paths = path.split("/")
-            val props = EditorConfigUtil.readProperties(git, branch, path)
+            val info = EditorConfigUtil.getEditorConfigInfo(git, branch, path)
 
             html.editor(
               branch = branch,
@@ -328,9 +328,9 @@ trait RepositoryViewerControllerBase extends ControllerBase {
               content = JGitUtil.getContentInfo(git, path, objectId),
               protectedBranch = protectedBranch,
               commit = revCommit.getName,
-              newLineMode = EditorConfigUtil.getNewLineMode(props),
-              useSoftTabs = EditorConfigUtil.getUseSoftTabs(props),
-              tabSize = EditorConfigUtil.getTabWidth(props)
+              newLineMode = info.newLineMode,
+              useSoftTabs = info.useSoftTabs,
+              tabSize = info.tabSize
             )
         } getOrElse NotFound()
     }
@@ -442,8 +442,7 @@ trait RepositoryViewerControllerBase extends ControllerBase {
               // Download (This route is left for backword compatibility)
               responseRawFile(git, objectId, path, repository)
             } else {
-              val props = EditorConfigUtil.readProperties(git, id, path)
-              val tabSize = EditorConfigUtil.getTabWidth(props)
+              val info = EditorConfigUtil.getEditorConfigInfo(git, id, path)
               html.blob(
                 branch = id,
                 repository = repository,
@@ -453,7 +452,7 @@ trait RepositoryViewerControllerBase extends ControllerBase {
                 hasWritePermission = hasDeveloperRole(repository.owner, repository.name, context.loginAccount),
                 isBlame = request.paths(2) == "blame",
                 isLfsFile = isLfsFile(git, objectId),
-                tabSize = tabSize
+                tabSize = info.tabSize
               )
             }
         } getOrElse NotFound()

src/main/scala/gitbucket/core/util/EditorConfigUtil.scala

@@ -1,17 +1,27 @@
 package gitbucket.core.util
 
-import java.nio.charset.StandardCharsets
+import java.io.IOException
 
 import editorconfig.{JGitResource, JGitResourcePath}
 import org.ec4j.core.model.PropertyType.{EndOfLineValue, IndentStyleValue}
 import org.ec4j.core.model.{PropertyType, Version}
+import org.ec4j.core.parser.ParseException
 import org.ec4j.core.{EditorConfigConstants, EditorConfigLoader, ResourceProperties, ResourcePropertiesService}
 import org.eclipse.jgit.api.Git
 
-import collection.JavaConverters._
-
 object EditorConfigUtil {
-  def readProperties(git: Git, rev: String, path: String): ResourceProperties = {
+  val TabSizeDefault: Int = 8
+  val NewLineModeDefault: String = "auto"
+  val UseSoftTabsDefault = false
+
+  case class EditorConfigInfo(
+    tabSize: Int,
+    newLineMode: String,
+    useSoftTabs: Boolean
+  )
+
+  def getEditorConfigInfo(git: Git, rev: String, path: String): EditorConfigInfo = {
+    try {
       val resourcePropertiesService = ResourcePropertiesService
         .builder()
         .configFileName(EditorConfigConstants.EDITORCONFIG)
@@ -20,27 +30,24 @@ object EditorConfigUtil {
         .keepUnset(true)
         .build()
 
-    resourcePropertiesService.queryProperties(new JGitResource(git, rev, path))
-  }
-
-  def getTabWidth(props: ResourceProperties): Int = {
-    props.getValue[Integer](PropertyType.tab_width, 8, false)
-  }
-
-  def getNewLineMode(props: ResourceProperties): String = {
-    props.getValue[EndOfLineValue](PropertyType.end_of_line, null, false) match {
+      val props = resourcePropertiesService.queryProperties(new JGitResource(git, rev, path))
+      EditorConfigInfo(
+        tabSize = props.getValue[Integer](PropertyType.tab_width, TabSizeDefault, false),
+        newLineMode = props.getValue[EndOfLineValue](PropertyType.end_of_line, null, false) match {
           case EndOfLineValue.cr   => "cr"
           case EndOfLineValue.lf   => "lf"
           case EndOfLineValue.crlf => "crlf"
           case _                   => "auto"
-    }
-  }
-
-  def getUseSoftTabs(props: ResourceProperties): Boolean = {
-    props.getValue[IndentStyleValue](PropertyType.indent_style, IndentStyleValue.tab, false) match {
+        },
+        props.getValue[IndentStyleValue](PropertyType.indent_style, null, false) match {
           case IndentStyleValue.space => true
           case IndentStyleValue.tab   => false
           case _                      => false
         }
+      )
+    } catch {
+      case e: ParseException => EditorConfigInfo(TabSizeDefault, NewLineModeDefault, UseSoftTabsDefault)
+      case e: IOException    => EditorConfigInfo(TabSizeDefault, NewLineModeDefault, UseSoftTabsDefault)
+    }
   }
 }

src/test/scala/gitbucket/core/util/EditorConfigUtilSpec.scala

@@ -12,15 +12,15 @@ class EditorConfigUtilSpec extends FunSuite {
   test("no EditorConfig file") {
     withTestRepository { git =>
       createFile(git, "master", "README.md", "body", message = "commit1")
-      val props = EditorConfigUtil.readProperties(git, "master", "test.txt")
-      assert(EditorConfigUtil.getTabWidth(props) == 8)
-      assert(EditorConfigUtil.getUseSoftTabs(props) == false)
-      assert(EditorConfigUtil.getNewLineMode(props) == "auto")
+      val info = EditorConfigUtil.getEditorConfigInfo(git, "master", "test.txt")
+      assert(info.tabSize == 8)
+      assert(info.useSoftTabs == false)
+      assert(info.newLineMode == "auto")
 
-      val subdirProps = EditorConfigUtil.readProperties(git, "master", "dir1/dir2/dir3/dir4/test.txt")
-      assert(EditorConfigUtil.getTabWidth(subdirProps) == 8)
-      assert(EditorConfigUtil.getUseSoftTabs(subdirProps) == false)
-      assert(EditorConfigUtil.getNewLineMode(subdirProps) == "auto")
+      val subdirInfo = EditorConfigUtil.getEditorConfigInfo(git, "master", "dir1/dir2/dir3/dir4/test.txt")
+      assert(subdirInfo.tabSize == 8)
+      assert(subdirInfo.useSoftTabs == false)
+      assert(subdirInfo.newLineMode == "auto")
     }
   }
 
@@ -28,11 +28,22 @@ class EditorConfigUtilSpec extends FunSuite {
     withTestRepository { git =>
       createFile(git, "master", ".editorconfig", simpleConfig, message = "commit1")
 
-      val props = EditorConfigUtil.readProperties(git, "master", "test.txt")
-      assert(EditorConfigUtil.getTabWidth(props) == 4)
+      val info = EditorConfigUtil.getEditorConfigInfo(git, "master", "test.txt")
+      assert(info.tabSize == 4)
 
-      val subdirProps = EditorConfigUtil.readProperties(git, "master", "dir1/dir2/dir3/dir4/test.txt")
-      assert(EditorConfigUtil.getTabWidth(subdirProps) == 4)
+      val subdirInfo = EditorConfigUtil.getEditorConfigInfo(git, "master", "dir1/dir2/dir3/dir4/test.txt")
+      assert(subdirInfo.tabSize == 4)
+    }
+  }
+
+  test(".editorconfig parse error") {
+    withTestRepository { git =>
+      createFile(git, "master", ".editorconfig", "equal_missing", message = "commit1")
+
+      val info = EditorConfigUtil.getEditorConfigInfo(git, "master", "test.txt")
+      assert(info.tabSize == 8)
+      assert(info.useSoftTabs == false)
+      assert(info.newLineMode == "auto")
     }
   }
 }