Repository avatars (#6986)

* Repository avatars

- first variant of code from old work for gogs
- add migration 87
- add new option in app.ini
- add en-US locale string
- add new class in repository.less

* Add changed index.css, remove unused template name

* Update en-us doc about configuration options

* Add comments to new functions, add new option to docker app.ini

* Add comment for lint

* Remove variable, not needed

* Fix formatting

* Update swagger api template

* Check if avatar exists

* Fix avatar link/path checks

* Typo

* TEXT column can't have a default value

* Fixes:

- remove old avatar file on upload
- use ID in name of avatar file - users may upload same files
- add simple tests

* Fix fmt check

* Generate PNG instead of "static" GIF

* More informative comment

* Fix error message

* Update avatar upload checks:

- add file size check
- add new option
- update config docs
- add new string to en-us locale

* Fixes:

- use FileHEader field for check file size
- add new test - upload big image

* Fix formatting

* Update comments

* Update log message

* Removed wrong style - not needed

* Use Sync2 to migrate

* Update repos list view

- bigger avatar
- fix html blocks alignment

* A little adjust avatar size

* Use small icons for explore/repo list

* Use new cool avatar preparation func by @lafriks

* Missing changes for new function

* Remove unused import, move imports

* Missed new option definition in app.ini

Add file size check in user/profile avatar upload

* Use smaller field length for Avatar

* Use session to update repo DB data, update DeleteAvatar - use session too

* Fix err variable definition

* As suggested @lafriks - return as soon as possible, code readability

2 files changed, 20 insertions, 0 deletions

diff --git a/models/migrations/migrations.go b/models/migrations/migrations.go
index f3a090e41c..b95a74c362 100644
--- a/models/migrations/migrations.go
+++ b/models/migrations/migrations.go
@@ -227,6 +227,8 @@ var migrations = []Migration{
 	NewMigration("hash application token", hashAppToken),
 	// v86 -> v87
 	NewMigration("add http method to webhook", addHTTPMethodToWebhook),
+	// v87 -> v88
+	NewMigration("add avatar field to repository", addAvatarFieldToRepository),
 }
 
 // Migrate database to current version
diff --git a/models/migrations/v87.go b/models/migrations/v87.go
new file mode 100644
index 0000000000..94711ac669
--- /dev/null
+++ b/models/migrations/v87.go
@@ -0,0 +1,18 @@
+// Copyright 2019 Gitea. 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 (
+	"github.com/go-xorm/xorm"
+)
+
+func addAvatarFieldToRepository(x *xorm.Engine) error {
+	type Repository struct {
+		// ID(10-20)-md5(32) - must fit into 64 symbols
+		Avatar string `xorm:"VARCHAR(64)"`
+	}
+
+	return x.Sync2(new(Repository))
+}