Display original author and URL information when showing migrated issues/comments (#7352)

* Store original author info for migrated issues and comments

Keep original author name for displaying in Gitea interface and also
store original author user ID for potential future use in linking
accounts from old location.

* Add original_url for repo

Store the original URL for a migrated repo

Clean up migrations/tests

* fix migration

* fix golangci-lint

* make 'make revive' happy also

* Modify templates to use OriginalAuthor if set

Use the original author name in templates if it is set rather than the
user who migrated/currently owns the issues

* formatting fixes

* make generate-swagger

* Use default avatar for imported comments

* Remove no longer used IgnoreIssueAuthor option

* Add OriginalAuthorID to swagger also

models/issue.go

@@ -25,27 +25,29 @@ import (
 
 // Issue represents an issue or pull request of repository.
 type Issue struct {
-	ID              int64       `xorm:"pk autoincr"`
-	RepoID          int64       `xorm:"INDEX UNIQUE(repo_index)"`
-	Repo            *Repository `xorm:"-"`
-	Index           int64       `xorm:"UNIQUE(repo_index)"` // Index in one repository.
-	PosterID        int64       `xorm:"INDEX"`
-	Poster          *User       `xorm:"-"`
-	Title           string      `xorm:"name"`
-	Content         string      `xorm:"TEXT"`
-	RenderedContent string      `xorm:"-"`
-	Labels          []*Label    `xorm:"-"`
-	MilestoneID     int64       `xorm:"INDEX"`
-	Milestone       *Milestone  `xorm:"-"`
-	Priority        int
-	AssigneeID      int64        `xorm:"-"`
-	Assignee        *User        `xorm:"-"`
-	IsClosed        bool         `xorm:"INDEX"`
-	IsRead          bool         `xorm:"-"`
-	IsPull          bool         `xorm:"INDEX"` // Indicates whether is a pull request or not.
-	PullRequest     *PullRequest `xorm:"-"`
-	NumComments     int
-	Ref             string
+	ID               int64       `xorm:"pk autoincr"`
+	RepoID           int64       `xorm:"INDEX UNIQUE(repo_index)"`
+	Repo             *Repository `xorm:"-"`
+	Index            int64       `xorm:"UNIQUE(repo_index)"` // Index in one repository.
+	PosterID         int64       `xorm:"INDEX"`
+	Poster           *User       `xorm:"-"`
+	OriginalAuthor   string
+	OriginalAuthorID int64
+	Title            string     `xorm:"name"`
+	Content          string     `xorm:"TEXT"`
+	RenderedContent  string     `xorm:"-"`
+	Labels           []*Label   `xorm:"-"`
+	MilestoneID      int64      `xorm:"INDEX"`
+	Milestone        *Milestone `xorm:"-"`
+	Priority         int
+	AssigneeID       int64        `xorm:"-"`
+	Assignee         *User        `xorm:"-"`
+	IsClosed         bool         `xorm:"INDEX"`
+	IsRead           bool         `xorm:"-"`
+	IsPull           bool         `xorm:"INDEX"` // Indicates whether is a pull request or not.
+	PullRequest      *PullRequest `xorm:"-"`
+	NumComments      int
+	Ref              string
 
 	DeadlineUnix util.TimeStamp `xorm:"INDEX"`