Added dependencies for issues (#2196) (#2531)

models/action.go

@@ -477,6 +477,10 @@ func UpdateIssuesCommit(doer *User, repo *Repository, commits []*PushCommit) err
 			}
 
 			if err = issue.ChangeStatus(doer, repo, true); err != nil {
+				// Don't return an error when dependencies are open as this would let the push fail
+				if IsErrDependenciesLeft(err) {
+					return nil
+				}
 				return err
 			}
 		}

models/error.go

@@ -1259,3 +1259,88 @@ func IsErrU2FRegistrationNotExist(err error) bool {
 	_, ok := err.(ErrU2FRegistrationNotExist)
 	return ok
 }
+
+// .___                            ________                                   .___                   .__
+// |   | ______ ________ __   ____ \______ \   ____ ______   ____   ____    __| _/____   ____   ____ |__| ____   ______
+// |   |/  ___//  ___/  |  \_/ __ \ |    |  \_/ __ \\____ \_/ __ \ /    \  / __ |/ __ \ /    \_/ ___\|  |/ __ \ /  ___/
+// |   |\___ \ \___ \|  |  /\  ___/ |    `   \  ___/|  |_> >  ___/|   |  \/ /_/ \  ___/|   |  \  \___|  \  ___/ \___ \
+// |___/____  >____  >____/  \___  >_______  /\___  >   __/ \___  >___|  /\____ |\___  >___|  /\___  >__|\___  >____  >
+//          \/     \/            \/        \/     \/|__|        \/     \/      \/    \/     \/     \/        \/     \/
+
+// ErrDependencyExists represents a "DependencyAlreadyExists" kind of error.
+type ErrDependencyExists struct {
+	IssueID      int64
+	DependencyID int64
+}
+
+// IsErrDependencyExists checks if an error is a ErrDependencyExists.
+func IsErrDependencyExists(err error) bool {
+	_, ok := err.(ErrDependencyExists)
+	return ok
+}
+
+func (err ErrDependencyExists) Error() string {
+	return fmt.Sprintf("issue dependency does already exist [issue id: %d, dependency id: %d]", err.IssueID, err.DependencyID)
+}
+
+// ErrDependencyNotExists represents a "DependencyAlreadyExists" kind of error.
+type ErrDependencyNotExists struct {
+	IssueID      int64
+	DependencyID int64
+}
+
+// IsErrDependencyNotExists checks if an error is a ErrDependencyExists.
+func IsErrDependencyNotExists(err error) bool {
+	_, ok := err.(ErrDependencyNotExists)
+	return ok
+}
+
+func (err ErrDependencyNotExists) Error() string {
+	return fmt.Sprintf("issue dependency does not exist [issue id: %d, dependency id: %d]", err.IssueID, err.DependencyID)
+}
+
+// ErrCircularDependency represents a "DependencyCircular" kind of error.
+type ErrCircularDependency struct {
+	IssueID      int64
+	DependencyID int64
+}
+
+// IsErrCircularDependency checks if an error is a ErrCircularDependency.
+func IsErrCircularDependency(err error) bool {
+	_, ok := err.(ErrCircularDependency)
+	return ok
+}
+
+func (err ErrCircularDependency) Error() string {
+	return fmt.Sprintf("circular dependencies exists (two issues blocking each other) [issue id: %d, dependency id: %d]", err.IssueID, err.DependencyID)
+}
+
+// ErrDependenciesLeft represents an error where the issue you're trying to close still has dependencies left.
+type ErrDependenciesLeft struct {
+	IssueID int64
+}
+
+// IsErrDependenciesLeft checks if an error is a ErrDependenciesLeft.
+func IsErrDependenciesLeft(err error) bool {
+	_, ok := err.(ErrDependenciesLeft)
+	return ok
+}
+
+func (err ErrDependenciesLeft) Error() string {
+	return fmt.Sprintf("issue has open dependencies [issue id: %d]", err.IssueID)
+}
+
+// ErrUnknownDependencyType represents an error where an unknown dependency type was passed
+type ErrUnknownDependencyType struct {
+	Type DependencyType
+}
+
+// IsErrUnknownDependencyType checks if an error is ErrUnknownDependencyType
+func IsErrUnknownDependencyType(err error) bool {
+	_, ok := err.(ErrUnknownDependencyType)
+	return ok
+}
+
+func (err ErrUnknownDependencyType) Error() string {
+	return fmt.Sprintf("unknown dependency type [type: %d]", err.Type)
+}

models/issue.go

@@ -649,6 +649,20 @@ func (issue *Issue) changeStatus(e *xorm.Session, doer *User, repo *Repository,
 	if issue.IsClosed == isClosed {
 		return nil
 	}
+
+	// Check for open dependencies
+	if isClosed && issue.Repo.IsDependenciesEnabled() {
+		// only check if dependencies are enabled and we're about to close an issue, otherwise reopening an issue would fail when there are unsatisfied dependencies
+		noDeps, err := IssueNoDependenciesLeft(issue)
+		if err != nil {
+			return err
+		}
+
+		if !noDeps {
+			return ErrDependenciesLeft{issue.ID}
+		}
+	}
+
 	issue.IsClosed = isClosed
 	if isClosed {
 		issue.ClosedUnix = util.TimeStampNow()
@@ -1598,3 +1612,33 @@ func UpdateIssueDeadline(issue *Issue, deadlineUnix util.TimeStamp, doer *User)
 
 	return sess.Commit()
 }
+
+// Get Blocked By Dependencies, aka all issues this issue is blocked by.
+func (issue *Issue) getBlockedByDependencies(e Engine) (issueDeps []*Issue, err error) {
+	return issueDeps, e.
+		Table("issue_dependency").
+		Select("issue.*").
+		Join("INNER", "issue", "issue.id = issue_dependency.dependency_id").
+		Where("issue_id = ?", issue.ID).
+		Find(&issueDeps)
+}
+
+// Get Blocking Dependencies, aka all issues this issue blocks.
+func (issue *Issue) getBlockingDependencies(e Engine) (issueDeps []*Issue, err error) {
+	return issueDeps, e.
+		Table("issue_dependency").
+		Select("issue.*").
+		Join("INNER", "issue", "issue.id = issue_dependency.issue_id").
+		Where("dependency_id = ?", issue.ID).
+		Find(&issueDeps)
+}
+
+// BlockedByDependencies finds all Dependencies an issue is blocked by
+func (issue *Issue) BlockedByDependencies() ([]*Issue, error) {
+	return issue.getBlockedByDependencies(x)
+}
+
+// BlockingDependencies returns all blocking dependencies, aka all other issues a given issue blocks
+func (issue *Issue) BlockingDependencies() ([]*Issue, error) {
+	return issue.getBlockingDependencies(x)
+}

models/issue_comment.go

@@ -66,6 +66,10 @@ const (
 	CommentTypeModifiedDeadline
 	// Removed a due date
 	CommentTypeRemovedDeadline
+	// Dependency added
+	CommentTypeAddDependency
+	//Dependency removed
+	CommentTypeRemoveDependency
 )
 
 // CommentTag defines comment tag type
@@ -81,23 +85,25 @@ const (
 
 // Comment represents a comment in commit and issue page.
 type Comment struct {
-	ID              int64 `xorm:"pk autoincr"`
-	Type            CommentType
-	PosterID        int64  `xorm:"INDEX"`
-	Poster          *User  `xorm:"-"`
-	IssueID         int64  `xorm:"INDEX"`
-	Issue           *Issue `xorm:"-"`
-	LabelID         int64
-	Label           *Label `xorm:"-"`
-	OldMilestoneID  int64
-	MilestoneID     int64
-	OldMilestone    *Milestone `xorm:"-"`
-	Milestone       *Milestone `xorm:"-"`
-	AssigneeID      int64
-	RemovedAssignee bool
-	Assignee        *User `xorm:"-"`
-	OldTitle        string
-	NewTitle        string
+	ID               int64 `xorm:"pk autoincr"`
+	Type             CommentType
+	PosterID         int64  `xorm:"INDEX"`
+	Poster           *User  `xorm:"-"`
+	IssueID          int64  `xorm:"INDEX"`
+	Issue            *Issue `xorm:"-"`
+	LabelID          int64
+	Label            *Label `xorm:"-"`
+	OldMilestoneID   int64
+	MilestoneID      int64
+	OldMilestone     *Milestone `xorm:"-"`
+	Milestone        *Milestone `xorm:"-"`
+	AssigneeID       int64
+	RemovedAssignee  bool
+	Assignee         *User `xorm:"-"`
+	OldTitle         string
+	NewTitle         string
+	DependentIssueID int64
+	DependentIssue   *Issue `xorm:"-"`
 
 	CommitID        int64
 	Line            int64
@@ -281,6 +287,15 @@ func (c *Comment) LoadAssigneeUser() error {
 	return nil
 }
 
+// LoadDepIssueDetails loads Dependent Issue Details
+func (c *Comment) LoadDepIssueDetails() (err error) {
+	if c.DependentIssueID <= 0 || c.DependentIssue != nil {
+		return nil
+	}
+	c.DependentIssue, err = getIssueByID(x, c.DependentIssueID)
+	return err
+}
+
 // MailParticipants sends new comment emails to repository watchers
 // and mentioned people.
 func (c *Comment) MailParticipants(e Engine, opType ActionType, issue *Issue) (err error) {
@@ -332,22 +347,24 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 	if opts.Label != nil {
 		LabelID = opts.Label.ID
 	}
+
 	comment := &Comment{
-		Type:            opts.Type,
-		PosterID:        opts.Doer.ID,
-		Poster:          opts.Doer,
-		IssueID:         opts.Issue.ID,
-		LabelID:         LabelID,
-		OldMilestoneID:  opts.OldMilestoneID,
-		MilestoneID:     opts.MilestoneID,
-		RemovedAssignee: opts.RemovedAssignee,
-		AssigneeID:      opts.AssigneeID,
-		CommitID:        opts.CommitID,
-		CommitSHA:       opts.CommitSHA,
-		Line:            opts.LineNum,
-		Content:         opts.Content,
-		OldTitle:        opts.OldTitle,
-		NewTitle:        opts.NewTitle,
+		Type:             opts.Type,
+		PosterID:         opts.Doer.ID,
+		Poster:           opts.Doer,
+		IssueID:          opts.Issue.ID,
+		LabelID:          LabelID,
+		OldMilestoneID:   opts.OldMilestoneID,
+		MilestoneID:      opts.MilestoneID,
+		RemovedAssignee:  opts.RemovedAssignee,
+		AssigneeID:       opts.AssigneeID,
+		CommitID:         opts.CommitID,
+		CommitSHA:        opts.CommitSHA,
+		Line:             opts.LineNum,
+		Content:          opts.Content,
+		OldTitle:         opts.OldTitle,
+		NewTitle:         opts.NewTitle,
+		DependentIssueID: opts.DependentIssueID,
 	}
 	if _, err = e.Insert(comment); err != nil {
 		return nil, err
@@ -549,6 +566,39 @@ func createDeleteBranchComment(e *xorm.Session, doer *User, repo *Repository, is
 	})
 }
 
+// Creates issue dependency comment
+func createIssueDependencyComment(e *xorm.Session, doer *User, issue *Issue, dependentIssue *Issue, add bool) (err error) {
+	cType := CommentTypeAddDependency
+	if !add {
+		cType = CommentTypeRemoveDependency
+	}
+
+	// Make two comments, one in each issue
+	_, err = createComment(e, &CreateCommentOptions{
+		Type:             cType,
+		Doer:             doer,
+		Repo:             issue.Repo,
+		Issue:            issue,
+		DependentIssueID: dependentIssue.ID,
+	})
+	if err != nil {
+		return
+	}
+
+	_, err = createComment(e, &CreateCommentOptions{
+		Type:             cType,
+		Doer:             doer,
+		Repo:             issue.Repo,
+		Issue:            dependentIssue,
+		DependentIssueID: issue.ID,
+	})
+	if err != nil {
+		return
+	}
+
+	return
+}
+
 // CreateCommentOptions defines options for creating comment
 type CreateCommentOptions struct {
 	Type  CommentType
@@ -557,17 +607,18 @@ type CreateCommentOptions struct {
 	Issue *Issue
 	Label *Label
 
-	OldMilestoneID  int64
-	MilestoneID     int64
-	AssigneeID      int64
-	RemovedAssignee bool
-	OldTitle        string
-	NewTitle        string
-	CommitID        int64
-	CommitSHA       string
-	LineNum         int64
-	Content         string
-	Attachments     []string // UUIDs of attachments
+	DependentIssueID int64
+	OldMilestoneID   int64
+	MilestoneID      int64
+	AssigneeID       int64
+	RemovedAssignee  bool
+	OldTitle         string
+	NewTitle         string
+	CommitID         int64
+	CommitSHA        string
+	LineNum          int64
+	Content          string
+	Attachments      []string // UUIDs of attachments
 }
 
 // CreateComment creates comment of issue or commit.

models/issue_dependency.go

@@ -0,0 +1,137 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+)
+
+// IssueDependency represents an issue dependency
+type IssueDependency struct {
+	ID           int64          `xorm:"pk autoincr"`
+	UserID       int64          `xorm:"NOT NULL"`
+	IssueID      int64          `xorm:"UNIQUE(issue_dependency) NOT NULL"`
+	DependencyID int64          `xorm:"UNIQUE(issue_dependency) NOT NULL"`
+	CreatedUnix  util.TimeStamp `xorm:"created"`
+	UpdatedUnix  util.TimeStamp `xorm:"updated"`
+}
+
+// DependencyType Defines Dependency Type Constants
+type DependencyType int
+
+// Define Dependency Types
+const (
+	DependencyTypeBlockedBy DependencyType = iota
+	DependencyTypeBlocking
+)
+
+// CreateIssueDependency creates a new dependency for an issue
+func CreateIssueDependency(user *User, issue, dep *Issue) error {
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	// Check if it aleready exists
+	exists, err := issueDepExists(sess, issue.ID, dep.ID)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return ErrDependencyExists{issue.ID, dep.ID}
+	}
+	// And if it would be circular
+	circular, err := issueDepExists(sess, dep.ID, issue.ID)
+	if err != nil {
+		return err
+	}
+	if circular {
+		return ErrCircularDependency{issue.ID, dep.ID}
+	}
+
+	if _, err := sess.Insert(&IssueDependency{
+		UserID:       user.ID,
+		IssueID:      issue.ID,
+		DependencyID: dep.ID,
+	}); err != nil {
+		return err
+	}
+
+	// Add comment referencing the new dependency
+	if err = createIssueDependencyComment(sess, user, issue, dep, true); err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}
+
+// RemoveIssueDependency removes a dependency from an issue
+func RemoveIssueDependency(user *User, issue *Issue, dep *Issue, depType DependencyType) (err error) {
+	sess := x.NewSession()
+	defer sess.Close()
+	if err = sess.Begin(); err != nil {
+		return err
+	}
+
+	var issueDepToDelete IssueDependency
+
+	switch depType {
+	case DependencyTypeBlockedBy:
+		issueDepToDelete = IssueDependency{IssueID: issue.ID, DependencyID: dep.ID}
+	case DependencyTypeBlocking:
+		issueDepToDelete = IssueDependency{IssueID: dep.ID, DependencyID: issue.ID}
+	default:
+		return ErrUnknownDependencyType{depType}
+	}
+
+	affected, err := sess.Delete(&issueDepToDelete)
+	if err != nil {
+		return err
+	}
+
+	// If we deleted nothing, the dependency did not exist
+	if affected <= 0 {
+		return ErrDependencyNotExists{issue.ID, dep.ID}
+	}
+
+	// Add comment referencing the removed dependency
+	if err = createIssueDependencyComment(sess, user, issue, dep, false); err != nil {
+		return err
+	}
+	return sess.Commit()
+}
+
+// Check if the dependency already exists
+func issueDepExists(e Engine, issueID int64, depID int64) (bool, error) {
+	return e.Where("(issue_id = ? AND dependency_id = ?)", issueID, depID).Exist(&IssueDependency{})
+}
+
+// IssueNoDependenciesLeft checks if issue can be closed
+func IssueNoDependenciesLeft(issue *Issue) (bool, error) {
+
+	exists, err := x.
+		Table("issue_dependency").
+		Select("issue.*").
+		Join("INNER", "issue", "issue.id = issue_dependency.dependency_id").
+		Where("issue_dependency.issue_id = ?", issue.ID).
+		And("issue.is_closed = ?", "0").
+		Exist(&Issue{})
+
+	return !exists, err
+}
+
+// IsDependenciesEnabled returns if dependecies are enabled and returns the default setting if not set.
+func (repo *Repository) IsDependenciesEnabled() bool {
+	var u *RepoUnit
+	var err error
+	if u, err = repo.GetUnit(UnitTypeIssues); err != nil {
+		log.Trace("%s", err)
+		return setting.Service.DefaultEnableDependencies
+	}
+	return u.IssuesConfig().EnableDependencies
+}

models/issue_dependency_test.go

@@ -0,0 +1,57 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateIssueDependency(t *testing.T) {
+	// Prepare
+	assert.NoError(t, PrepareTestDatabase())
+
+	user1, err := GetUserByID(1)
+	assert.NoError(t, err)
+
+	issue1, err := GetIssueByID(1)
+	assert.NoError(t, err)
+	issue2, err := GetIssueByID(2)
+	assert.NoError(t, err)
+
+	// Create a dependency and check if it was successful
+	err = CreateIssueDependency(user1, issue1, issue2)
+	assert.NoError(t, err)
+
+	// Do it again to see if it will check if the dependency already exists
+	err = CreateIssueDependency(user1, issue1, issue2)
+	assert.Error(t, err)
+	assert.True(t, IsErrDependencyExists(err))
+
+	// Check for circular dependencies
+	err = CreateIssueDependency(user1, issue2, issue1)
+	assert.Error(t, err)
+	assert.True(t, IsErrCircularDependency(err))
+
+	_ = AssertExistsAndLoadBean(t, &Comment{Type: CommentTypeAddDependency, PosterID: user1.ID, IssueID: issue1.ID})
+
+	// Check if dependencies left is correct
+	left, err := IssueNoDependenciesLeft(issue1)
+	assert.NoError(t, err)
+	assert.False(t, left)
+
+	// Close #2 and check again
+	err = issue2.ChangeStatus(user1, issue2.Repo, true)
+	assert.NoError(t, err)
+
+	left, err = IssueNoDependenciesLeft(issue1)
+	assert.NoError(t, err)
+	assert.True(t, left)
+
+	// Test removing the dependency
+	err = RemoveIssueDependency(user1, issue1, issue2, DependencyTypeBlockedBy)
+	assert.NoError(t, err)
+}

models/migrations/migrations.go

@@ -192,6 +192,8 @@ var migrations = []Migration{
 	NewMigration("Reformat and remove incorrect topics", reformatAndRemoveIncorrectTopics),
 	// v69 -> v70
 	NewMigration("move team units to team_unit table", moveTeamUnitsToTeamUnitTable),
+	// v70 -> v71
+	NewMigration("add issue_dependencies", addIssueDependencies),
 }
 
 // Migrate database to current version

models/migrations/v70.go

@@ -0,0 +1,100 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/go-xorm/xorm"
+)
+
+func addIssueDependencies(x *xorm.Engine) (err error) {
+
+	type IssueDependency struct {
+		ID           int64     `xorm:"pk autoincr"`
+		UserID       int64     `xorm:"NOT NULL"`
+		IssueID      int64     `xorm:"NOT NULL"`
+		DependencyID int64     `xorm:"NOT NULL"`
+		Created      time.Time `xorm:"-"`
+		CreatedUnix  int64     `xorm:"created"`
+		Updated      time.Time `xorm:"-"`
+		UpdatedUnix  int64     `xorm:"updated"`
+	}
+
+	if err = x.Sync(new(IssueDependency)); err != nil {
+		return fmt.Errorf("Error creating issue_dependency_table column definition: %v", err)
+	}
+
+	// Update Comment definition
+	// This (copied) struct does only contain fields used by xorm as the only use here is to update the database
+
+	// CommentType defines the comment type
+	type CommentType int
+
+	// TimeStamp defines a timestamp
+	type TimeStamp int64
+
+	type Comment struct {
+		ID               int64 `xorm:"pk autoincr"`
+		Type             CommentType
+		PosterID         int64 `xorm:"INDEX"`
+		IssueID          int64 `xorm:"INDEX"`
+		LabelID          int64
+		OldMilestoneID   int64
+		MilestoneID      int64
+		OldAssigneeID    int64
+		AssigneeID       int64
+		OldTitle         string
+		NewTitle         string
+		DependentIssueID int64
+
+		CommitID int64
+		Line     int64
+		Content  string `xorm:"TEXT"`
+
+		CreatedUnix TimeStamp `xorm:"INDEX created"`
+		UpdatedUnix TimeStamp `xorm:"INDEX updated"`
+
+		// Reference issue in commit message
+		CommitSHA string `xorm:"VARCHAR(40)"`
+	}
+
+	if err = x.Sync(new(Comment)); err != nil {
+		return fmt.Errorf("Error updating issue_comment table column definition: %v", err)
+	}
+
+	// RepoUnit describes all units of a repository
+	type RepoUnit struct {
+		ID          int64
+		RepoID      int64                  `xorm:"INDEX(s)"`
+		Type        int                    `xorm:"INDEX(s)"`
+		Config      map[string]interface{} `xorm:"JSON"`
+		CreatedUnix int64                  `xorm:"INDEX CREATED"`
+		Created     time.Time              `xorm:"-"`
+	}
+
+	//Updating existing issue units
+	units := make([]*RepoUnit, 0, 100)
+	err = x.Where("`type` = ?", V16UnitTypeIssues).Find(&units)
+	if err != nil {
+		return fmt.Errorf("Query repo units: %v", err)
+	}
+	for _, unit := range units {
+		if unit.Config == nil {
+			unit.Config = make(map[string]interface{})
+		}
+		if _, ok := unit.Config["EnableDependencies"]; !ok {
+			unit.Config["EnableDependencies"] = setting.Service.DefaultEnableDependencies
+		}
+		if _, err := x.ID(unit.ID).Cols("config").Update(unit); err != nil {
+			return err
+		}
+	}
+
+	return err
+}

models/models.go

@@ -118,6 +118,7 @@ func init() {
 		new(TrackedTime),
 		new(DeletedBranch),
 		new(RepoIndexerStatus),
+		new(IssueDependency),
 		new(LFSLock),
 		new(Reaction),
 		new(IssueAssignees),

models/repo.go

@@ -1345,7 +1345,11 @@ func createRepository(e *xorm.Session, doer, u *User, repo *Repository) (err err
 			units = append(units, RepoUnit{
 				RepoID: repo.ID,
 				Type:   tp,
-				Config: &IssuesConfig{EnableTimetracker: setting.Service.DefaultEnableTimetracking, AllowOnlyContributorsToTrackTime: setting.Service.DefaultAllowOnlyContributorsToTrackTime},
+				Config: &IssuesConfig{
+					EnableTimetracker:                setting.Service.DefaultEnableTimetracking,
+					AllowOnlyContributorsToTrackTime: setting.Service.DefaultAllowOnlyContributorsToTrackTime,
+					EnableDependencies:               setting.Service.DefaultEnableDependencies,
+				},
 			})
 		} else if tp == UnitTypePullRequests {
 			units = append(units, RepoUnit{

models/repo_unit.go

@@ -73,6 +73,7 @@ func (cfg *ExternalTrackerConfig) ToDB() ([]byte, error) {
 type IssuesConfig struct {
 	EnableTimetracker                bool
 	AllowOnlyContributorsToTrackTime bool
+	EnableDependencies               bool
 }
 
 // FromDB fills up a IssuesConfig from serialized format.
@@ -165,7 +166,6 @@ func (r *RepoUnit) IssuesConfig() *IssuesConfig {
 func (r *RepoUnit) ExternalTrackerConfig() *ExternalTrackerConfig {
 	return r.Config.(*ExternalTrackerConfig)
 }
-
 func getUnitsByRepoID(e Engine, repoID int64) (units []*RepoUnit, err error) {
 	return units, e.Where("repo_id = ?", repoID).Find(&units)
 }