Merge remote-tracking branch 'giteaofficial/main'

* giteaofficial/main:
  Fix typo (go-gitea#21695)
  Remove template previewer (go-gitea#21701)
  Revert "[skip ci] Updated translations via Crowdin" (go-gitea#21689)
  [skip ci] Updated translations via Crowdin
  Fix docs relref (go-gitea#21685)
  Add "Copy" button to file view of raw text (go-gitea#21629)
  Improve valid user name check (go-gitea#20136)

Author: zjjhot

docs/content/doc/installation/from-source.fr-fr.md

@@ -53,7 +53,7 @@ git checkout pr-xyz
 
 ## Compilation
 
-Comme nous regroupons déjà toutes les bibliothèques requises pour compiler Gitea, vous pouvez continuer avec le processus de compilation lui-même. Nous fournissons diverses [tâches Make](https://github.com/go-gitea/gitea/blob/master/Makefile) pour rendre le processus de construction aussi simple que possible. [Voyez ici comment obtenir Make]({{< relref "doc/developers/hacking-on-gitea.fr-fr.md" >}}#installing-make). Selon vos besoins, vous pourrez éventuellement ajouter diverses options de compilation, vous pouvez choisir entre ces options :
+Comme nous regroupons déjà toutes les bibliothèques requises pour compiler Gitea, vous pouvez continuer avec le processus de compilation lui-même. Nous fournissons diverses [tâches Make](https://github.com/go-gitea/gitea/blob/master/Makefile) pour rendre le processus de construction aussi simple que possible. [Voyez ici comment obtenir Make](/fr-fr/hacking-on-gitea/). Selon vos besoins, vous pourrez éventuellement ajouter diverses options de compilation, vous pouvez choisir entre ces options :
 
 * `bindata`: Intègre toutes les ressources nécessaires à l'exécution d'une instance de Gitea, ce qui rend un déploiement facile car il n'est pas nécessaire de se préoccuper des fichiers supplémentaires.
 * `sqlite sqlite_unlock_notify`: Active la prise en charge d'une base de données [SQLite3](https://sqlite.org/), ceci n'est recommandé que pour les petites installations de Gitea.

docs/content/doc/installation/from-source.zh-cn.md

@@ -54,7 +54,7 @@ git checkout v{{< version >}}
 
 - `go` {{< min-go-version >}} 或以上版本, 详见[这里](https://golang.google.cn/doc/install)
 - `node` {{< min-node-version >}} 或以上版本，并且安装 `npm`, 详见[这里](https://nodejs.org/zh-cn/download/)
-- `make`, 详见[这里]({{< relref "doc/developers/hacking-on-gitea.zh-cn.md" >}})</a>
+- `make`, 详见[这里](/zh-cn/hacking-on-gitea/)
 
 各种可用的 [make 任务](https://github.com/go-gitea/gitea/blob/main/Makefile)
 可以用来使编译过程更方便。

models/user/user.go

@@ -29,6 +29,7 @@ import (
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/validation"
 
 	"golang.org/x/crypto/argon2"
 	"golang.org/x/crypto/bcrypt"
@@ -621,7 +622,7 @@ var (
 // IsUsableUsername returns an error when a username is reserved
 func IsUsableUsername(name string) error {
 	// Validate username make sure it satisfies requirement.
-	if db.AlphaDashDotPattern.MatchString(name) {
+	if !validation.IsValidUsername(name) {
 		// Note: usually this error is normally caught up earlier in the UI
 		return db.ErrNameCharsNotAllowed{Name: name}
 	}

modules/structs/admin_user.go

@@ -10,7 +10,7 @@ type CreateUserOption struct {
 	SourceID  int64  `json:"source_id"`
 	LoginName string `json:"login_name"`
 	// required: true
-	Username string `json:"username" binding:"Required;AlphaDashDot;MaxSize(40)"`
+	Username string `json:"username" binding:"Required;Username;MaxSize(40)"`
 	FullName string `json:"full_name" binding:"MaxSize(100)"`
 	// required: true
 	// swagger:strfmt email

modules/validation/binding.go

@@ -24,6 +24,9 @@ const (
 
 	// ErrRegexPattern is returned when a regex pattern is invalid
 	ErrRegexPattern = "RegexPattern"
+
+	// ErrUsername is username error
+	ErrUsername = "UsernameError"
 )
 
 // AddBindingRules adds additional binding rules
@@ -34,6 +37,7 @@ func AddBindingRules() {
 	addGlobPatternRule()
 	addRegexPatternRule()
 	addGlobOrRegexPatternRule()
+	addUsernamePatternRule()
 }
 
 func addGitRefNameBindingRule() {
@@ -148,6 +152,22 @@ func addGlobOrRegexPatternRule() {
 	})
 }
 
+func addUsernamePatternRule() {
+	binding.AddRule(&binding.Rule{
+		IsMatch: func(rule string) bool {
+			return rule == "Username"
+		},
+		IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
+			str := fmt.Sprintf("%v", val)
+			if !IsValidUsername(str) {
+				errs.Add([]string{name}, ErrUsername, "invalid username")
+				return false, errs
+			}
+			return true, errs
+		},
+	})
+}
+
 func portOnly(hostport string) string {
 	colon := strings.IndexByte(hostport, ':')
 	if colon == -1 {

modules/validation/helpers.go

@@ -91,3 +91,15 @@ func IsValidExternalTrackerURLFormat(uri string) bool {
 
 	return true
 }
+
+var (
+	validUsernamePattern   = regexp.MustCompile(`^[\da-zA-Z][-.\w]*$`)
+	invalidUsernamePattern = regexp.MustCompile(`[-._]{2,}|[-._]$`) // No consecutive or trailing non-alphanumeric chars
+)
+
+// IsValidUsername checks if username is valid
+func IsValidUsername(name string) bool {
+	// It is difficult to find a single pattern that is both readable and effective,
+	// but it's easier to use positive and negative checks.
+	return validUsernamePattern.MatchString(name) && !invalidUsernamePattern.MatchString(name)
+}

modules/validation/helpers_test.go

@@ -155,3 +155,34 @@ func Test_IsValidExternalTrackerURLFormat(t *testing.T) {
 		})
 	}
 }
+
+func TestIsValidUsername(t *testing.T) {
+	tests := []struct {
+		arg  string
+		want bool
+	}{
+		{arg: "a", want: true},
+		{arg: "abc", want: true},
+		{arg: "0.b-c", want: true},
+		{arg: "a.b-c_d", want: true},
+		{arg: "", want: false},
+		{arg: ".abc", want: false},
+		{arg: "abc.", want: false},
+		{arg: "a..bc", want: false},
+		{arg: "a...bc", want: false},
+		{arg: "a.-bc", want: false},
+		{arg: "a._bc", want: false},
+		{arg: "a_-bc", want: false},
+		{arg: "a/bc", want: false},
+		{arg: "☁️", want: false},
+		{arg: "-", want: false},
+		{arg: "--diff", want: false},
+		{arg: "-im-here", want: false},
+		{arg: "a space", want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.arg, func(t *testing.T) {
+			assert.Equalf(t, tt.want, IsValidUsername(tt.arg), "IsValidUsername(%v)", tt.arg)
+		})
+	}
+}

modules/web/middleware/binding.go

@@ -135,6 +135,8 @@ func Validate(errs binding.Errors, data map[string]interface{}, f Form, l transl
 				data["ErrorMsg"] = trName + l.Tr("form.glob_pattern_error", errs[0].Message)
 			case validation.ErrRegexPattern:
 				data["ErrorMsg"] = trName + l.Tr("form.regex_pattern_error", errs[0].Message)
+			case validation.ErrUsername:
+				data["ErrorMsg"] = trName + l.Tr("form.username_error")
 			default:
 				msg := errs[0].Classification
 				if msg != "" && errs[0].Message != "" {

options/locale/locale_en-US.ini

@@ -88,6 +88,7 @@ edit = Edit
 
 copy = Copy
 copy_url = Copy URL
+copy_content = Copy content
 copy_branch = Copy branch name
 copy_success = Copied!
 copy_error = Copy failed
@@ -463,6 +464,7 @@ url_error = `'%s' is not a valid URL.`
 include_error = ` must contain substring '%s'.`
 glob_pattern_error = ` glob pattern is invalid: %s.`
 regex_pattern_error = ` regex pattern is invalid: %s.`
+username_error = ` can only contain alphanumeric chars ('0-9','a-z','A-Z'), dash ('-'), underscore ('_') and dot ('.'). It cannot begin or end with non-alphanumeric chars, and consecutive non-alphanumeric chars are also forbidden.`
 unknown_error = Unknown error:
 captcha_incorrect = The CAPTCHA code is incorrect.
 password_not_match = The passwords do not match.
@@ -1089,6 +1091,7 @@ editor.cannot_edit_non_text_files = Binary files cannot be edited in the web int
 editor.edit_this_file = Edit File
 editor.this_file_locked = File is locked
 editor.must_be_on_a_branch = You must be on a branch to make or propose changes to this file.
+editor.only_copy_raw = You may only copy raw text files.
 editor.fork_before_edit = You must fork this repository to make or propose changes to this file.
 editor.delete_this_file = Delete File
 editor.must_have_write_access = You must have write access to make or propose changes to this file.