Enables mssql support (#383)

* Enables mssql support

Port of dlobs work in gogs.
Enables options in index.js
Enables MSSQL as a database option in go.
Sets ID to 0 on initial migration. Required for
MSSQL insert statements.

Signed-off-by: Beau Trepp <beautrepp@gmail.com>

* Vendors in denisenkom/go-mssqldb

Includes golang.org/x/crypto/md4
as this is required by go-msssqldb

Signed-off-by: Beau Trepp <beautrepp@gmail.com>

Author: btrepp

Diff for: models/migrations/migrations.go

@@ -93,6 +93,7 @@ func Migrate(x *xorm.Engine) error {
 	} else if !has {
 		// If the version record does not exist we think
 		// it is a fresh installation and we can skip all migrations.
+		currentVersion.ID = 0
 		currentVersion.Version = int64(minDBVersion + len(migrations))
 
 		if _, err = x.InsertOne(currentVersion); err != nil {

Diff for: models/models.go

@@ -21,6 +21,9 @@ import (
 	// Needed for the Postgresql driver
 	_ "github.com/lib/pq"
 
+	// Needed for the MSSSQL driver
+	_ "github.com/denisenkom/go-mssqldb"
+
 	"code.gitea.io/gitea/models/migrations"
 	"code.gitea.io/gitea/modules/setting"
 )
@@ -97,6 +100,8 @@ func LoadConfigs() {
 		setting.UsePostgreSQL = true
 	case "tidb":
 		setting.UseTiDB = true
+	case "mssql":
+		setting.UseMSSQL = true
 	}
 	DbCfg.Host = sec.Key("HOST").String()
 	DbCfg.Name = sec.Key("NAME").String()
@@ -123,6 +128,20 @@ func parsePostgreSQLHostPort(info string) (string, string) {
 	return host, port
 }
 
+func parseMSSQLHostPort(info string) (string, string) {
+	host, port := "127.0.0.1", "1433"
+		if strings.Contains(info, ":") {
+			host = strings.Split(info, ":")[0]
+				port = strings.Split(info, ":")[1]
+		} else if strings.Contains(info, ",") {
+			host = strings.Split(info, ",")[0]
+				port = strings.TrimSpace(strings.Split(info, ",")[1])
+		} else if len(info) > 0 {
+			host = info
+		}
+	return host, port
+}
+
 func getEngine() (*xorm.Engine, error) {
 	connStr := ""
 	var Param = "?"
@@ -147,6 +166,9 @@ func getEngine() (*xorm.Engine, error) {
 			connStr = fmt.Sprintf("postgres://%s:%s@%s:%s/%s%ssslmode=%s",
 				url.QueryEscape(DbCfg.User), url.QueryEscape(DbCfg.Passwd), host, port, DbCfg.Name, Param, DbCfg.SSLMode)
 		}
+	case "mssql":
+		host, port := parseMSSQLHostPort(DbCfg.Host)
+		connStr = fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;", host, port, DbCfg.Name, DbCfg.User, DbCfg.Passwd)
 	case "sqlite3":
 		if !EnableSQLite3 {
 			return nil, errors.New("this binary version does not build support for SQLite3")

Diff for: modules/setting/setting.go

@@ -100,6 +100,7 @@ var (
 	// Database settings
 	UseSQLite3    bool
 	UseMySQL      bool
+	UseMSSQL      bool
 	UsePostgreSQL bool
 	UseTiDB       bool
 

Diff for: public/js/index.js

@@ -228,22 +228,22 @@ function initInstall() {
             return;
         }
 
-        var mysqlDefault = '127.0.0.1:3306';
-        var postgresDefault = '127.0.0.1:5432';
+        var dbDefaults = {
+            "MySQL": "127.0.0.1:3306",
+            "PostgreSQL": "127.0.0.1:5432",
+            "MSSQL": "127.0.0.1:1433"
+        };
 
         $('#sqlite_settings').hide();
         $('#sql_settings').show();
-        if (dbType === "PostgreSQL") {
-            $('#pgsql_settings').show();
-            if ($('#db_host').val() == mysqlDefault) {
-                $('#db_host').val(postgresDefault);
-            }
-        } else {
-            $('#pgsql_settings').hide();
-            if ($('#db_host').val() == postgresDefault) {
-                $('#db_host').val(mysqlDefault);
+
+        $('#pgsql_settings').toggle(dbType === "PostgreSQL");
+        $.each(dbDefaults, function(type, defaultHost) {
+            if ($('#db_host').val() == defaultHost) {
+                $('#db_host').val(dbDefaults[dbType]);
+                return false;
             }
-        }
+        });
     });
 
     // TODO: better handling of exclusive relations.

Diff for: routers/install.go

@@ -40,7 +40,7 @@ func InstallInit(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("install.install")
 	ctx.Data["PageIsInstall"] = true
 
-	dbOpts := []string{"MySQL", "PostgreSQL"}
+	dbOpts := []string{"MySQL", "PostgreSQL","MSSQL"}
 	if models.EnableSQLite3 {
 		dbOpts = append(dbOpts, "SQLite3")
 	}
@@ -64,6 +64,8 @@ func Install(ctx *context.Context) {
 	switch models.DbCfg.Type {
 	case "postgres":
 		ctx.Data["CurDbOption"] = "PostgreSQL"
+	case "mssql":
+		ctx.Data["CurDbOption"] = "MSSQL"
 	case "sqlite3":
 		if models.EnableSQLite3 {
 			ctx.Data["CurDbOption"] = "SQLite3"
@@ -139,7 +141,7 @@ func InstallPost(ctx *context.Context, form auth.InstallForm) {
 
 	// Pass basic check, now test configuration.
 	// Test database setting.
-	dbTypes := map[string]string{"MySQL": "mysql", "PostgreSQL": "postgres", "SQLite3": "sqlite3", "TiDB": "tidb"}
+	dbTypes := map[string]string{"MySQL": "mysql", "PostgreSQL": "postgres", "MSSQL": "mssql", "SQLite3": "sqlite3", "TiDB": "tidb"}
 	models.DbCfg.Type = dbTypes[form.DbType]
 	models.DbCfg.Host = form.DbHost
 	models.DbCfg.User = form.DbUser