Fix implementation of repo Home func (#2601)

* Fix implementation of repo Home func

* Make fixture changes for testing

models/fixtures/repo_unit.yml

@@ -1,40 +1,40 @@
 -
   id: 1
   repo_id: 1
-  type: 1
-  index: 0
+  type: 4
+  index: 3
   config: "{}"
   created_unix: 946684810
 
 -
   id: 2
   repo_id: 1
-  type: 2
-  index: 1
-  config: "{\"EnableTimetracker\":true,\"AllowOnlyContributorsToTrackTime\":true}"
+  type: 5
+  index: 4
+  config: "{}"
   created_unix: 946684810
 
 -
   id: 3
   repo_id: 1
-  type: 3
-  index: 2
+  type: 1
+  index: 0
   config: "{}"
   created_unix: 946684810
 
 -
   id: 4
   repo_id: 1
-  type: 4
-  index: 3
-  config: "{}"
+  type: 2
+  index: 1
+  config: "{\"EnableTimetracker\":true,\"AllowOnlyContributorsToTrackTime\":true}"
   created_unix: 946684810
 
 -
   id: 5
   repo_id: 1
-  type: 5
-  index: 4
+  type: 3
+  index: 2
   config: "{}"
   created_unix: 946684810
 

models/unit.go

@@ -60,6 +60,14 @@ func (u *Unit) CanDisable() bool {
 	return true
 }
 
+// IsLessThan compares order of two units
+func (u Unit) IsLessThan(unit Unit) bool {
+	if (u.Type == UnitTypeExternalTracker || u.Type == UnitTypeExternalWiki) && unit.Type != UnitTypeExternalTracker && unit.Type != UnitTypeExternalWiki {
+		return false
+	}
+	return u.Idx < unit.Idx
+}
+
 // Enumerate all the units
 var (
 	UnitCode = Unit{

routers/repo/view.go

@@ -264,16 +264,21 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st
 // Home render repository home page
 func Home(ctx *context.Context) {
 	if len(ctx.Repo.Repository.Units) > 0 {
-		tp := ctx.Repo.Repository.Units[0].Type
-		if tp == models.UnitTypeCode {
+		var firstUnit *models.Unit
+		for _, repoUnit := range ctx.Repo.Repository.Units {
+			if repoUnit.Type == models.UnitTypeCode {
 				renderCode(ctx)
 				return
 			}
 
-		unit, ok := models.Units[tp]
-		if ok {
-			ctx.Redirect(setting.AppSubURL + fmt.Sprintf("/%s%s",
-				ctx.Repo.Repository.FullName(), unit.URI))
+			unit, ok := models.Units[repoUnit.Type]
+			if ok && (firstUnit == nil || !firstUnit.IsLessThan(unit)) {
+				firstUnit = &unit
+			}
+		}
+
+		if firstUnit != nil {
+			ctx.Redirect(fmt.Sprintf("%s/%s%s", setting.AppSubURL, ctx.Repo.Repository.FullName(), firstUnit.URI))
 			return
 		}
 	}