Move database settings from models to setting (#7806)

* move database settings from models to setting

* update docs

* fix checkout pr

* fix tests

* fix lint

* remove unsupported tidb options

* correct wrong variable name

* remove tidb totally

modules/setting/database_test.go

@@ -0,0 +1,94 @@
+// Copyright 2019 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 setting
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_parsePostgreSQLHostPort(t *testing.T) {
+	tests := []struct {
+		HostPort string
+		Host     string
+		Port     string
+	}{
+		{
+			HostPort: "127.0.0.1:1234",
+			Host:     "127.0.0.1",
+			Port:     "1234",
+		},
+		{
+			HostPort: "127.0.0.1",
+			Host:     "127.0.0.1",
+			Port:     "5432",
+		},
+		{
+			HostPort: "[::1]:1234",
+			Host:     "[::1]",
+			Port:     "1234",
+		},
+		{
+			HostPort: "[::1]",
+			Host:     "[::1]",
+			Port:     "5432",
+		},
+		{
+			HostPort: "/tmp/pg.sock:1234",
+			Host:     "/tmp/pg.sock",
+			Port:     "1234",
+		},
+		{
+			HostPort: "/tmp/pg.sock",
+			Host:     "/tmp/pg.sock",
+			Port:     "5432",
+		},
+	}
+	for _, test := range tests {
+		host, port := parsePostgreSQLHostPort(test.HostPort)
+		assert.Equal(t, test.Host, host)
+		assert.Equal(t, test.Port, port)
+	}
+}
+
+func Test_getPostgreSQLConnectionString(t *testing.T) {
+	tests := []struct {
+		Host    string
+		Port    string
+		User    string
+		Passwd  string
+		Name    string
+		Param   string
+		SSLMode string
+		Output  string
+	}{
+		{
+			Host:    "/tmp/pg.sock",
+			Port:    "4321",
+			User:    "testuser",
+			Passwd:  "space space !#$%^^%^```-=?=",
+			Name:    "gitea",
+			Param:   "",
+			SSLMode: "false",
+			Output:  "postgres://testuser:space%20space%20%21%23$%25%5E%5E%25%5E%60%60%60-=%3F=@:5432/giteasslmode=false&host=/tmp/pg.sock",
+		},
+		{
+			Host:    "localhost",
+			Port:    "1234",
+			User:    "pgsqlusername",
+			Passwd:  "I love Gitea!",
+			Name:    "gitea",
+			Param:   "",
+			SSLMode: "true",
+			Output:  "postgres://pgsqlusername:I%20love%20Gitea%21@localhost:5432/giteasslmode=true",
+		},
+	}
+
+	for _, test := range tests {
+		connStr := getPostgreSQLConnectionString(test.Host, test.User, test.Passwd, test.Name, test.Param, test.SSLMode)
+		assert.Equal(t, test.Output, connStr)
+	}
+}