1 files changed, 277 insertions, 0 deletions
diff --git a/vendor/github.com/go-pg/pg/v10/options.go b/vendor/github.com/go-pg/pg/v10/options.go
new file mode 100644
index 000000000..efd634fd2
--- /dev/null
+++ b/vendor/github.com/go-pg/pg/v10/options.go
@@ -0,0 +1,277 @@
+package pg
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/go-pg/pg/v10/internal/pool"
+)
+
+// Options contains database connection options.
+type Options struct {
+	// Network type, either tcp or unix.
+	// Default is tcp.
+	Network string
+	// TCP host:port or Unix socket depending on Network.
+	Addr string
+
+	// Dialer creates new network connection and has priority over
+	// Network and Addr options.
+	Dialer func(ctx context.Context, network, addr string) (net.Conn, error)
+
+	// Hook that is called after new connection is established
+	// and user is authenticated.
+	OnConnect func(ctx context.Context, cn *Conn) error
+
+	User     string
+	Password string
+	Database string
+
+	// ApplicationName is the application name. Used in logs on Pg side.
+	// Only available from pg-9.0.
+	ApplicationName string
+
+	// TLS config for secure connections.
+	TLSConfig *tls.Config
+
+	// Dial timeout for establishing new connections.
+	// Default is 5 seconds.
+	DialTimeout time.Duration
+
+	// Timeout for socket reads. If reached, commands will fail
+	// with a timeout instead of blocking.
+	ReadTimeout time.Duration
+	// Timeout for socket writes. If reached, commands will fail
+	// with a timeout instead of blocking.
+	WriteTimeout time.Duration
+
+	// Maximum number of retries before giving up.
+	// Default is to not retry failed queries.
+	MaxRetries int
+	// Whether to retry queries cancelled because of statement_timeout.
+	RetryStatementTimeout bool
+	// Minimum backoff between each retry.
+	// Default is 250 milliseconds; -1 disables backoff.
+	MinRetryBackoff time.Duration
+	// Maximum backoff between each retry.
+	// Default is 4 seconds; -1 disables backoff.
+	MaxRetryBackoff time.Duration
+
+	// Maximum number of socket connections.
+	// Default is 10 connections per every CPU as reported by runtime.NumCPU.
+	PoolSize int
+	// Minimum number of idle connections which is useful when establishing
+	// new connection is slow.
+	MinIdleConns int
+	// Connection age at which client retires (closes) the connection.
+	// It is useful with proxies like PgBouncer and HAProxy.
+	// Default is to not close aged connections.
+	MaxConnAge time.Duration
+	// Time for which client waits for free connection if all
+	// connections are busy before returning an error.
+	// Default is 30 seconds if ReadTimeOut is not defined, otherwise,
+	// ReadTimeout + 1 second.
+	PoolTimeout time.Duration
+	// Amount of time after which client closes idle connections.
+	// Should be less than server's timeout.
+	// Default is 5 minutes. -1 disables idle timeout check.
+	IdleTimeout time.Duration
+	// Frequency of idle checks made by idle connections reaper.
+	// Default is 1 minute. -1 disables idle connections reaper,
+	// but idle connections are still discarded by the client
+	// if IdleTimeout is set.
+	IdleCheckFrequency time.Duration
+}
+
+func (opt *Options) init() {
+	if opt.Network == "" {
+		opt.Network = "tcp"
+	}
+
+	if opt.Addr == "" {
+		switch opt.Network {
+		case "tcp":
+			host := env("PGHOST", "localhost")
+			port := env("PGPORT", "5432")
+			opt.Addr = fmt.Sprintf("%s:%s", host, port)
+		case "unix":
+			opt.Addr = "/var/run/postgresql/.s.PGSQL.5432"
+		}
+	}
+
+	if opt.DialTimeout == 0 {
+		opt.DialTimeout = 5 * time.Second
+	}
+	if opt.Dialer == nil {
+		opt.Dialer = func(ctx context.Context, network, addr string) (net.Conn, error) {
+			netDialer := &net.Dialer{
+				Timeout:   opt.DialTimeout,
+				KeepAlive: 5 * time.Minute,
+			}
+			return netDialer.DialContext(ctx, network, addr)
+		}
+	}
+
+	if opt.User == "" {
+		opt.User = env("PGUSER", "postgres")
+	}
+
+	if opt.Database == "" {
+		opt.Database = env("PGDATABASE", "postgres")
+	}
+
+	if opt.PoolSize == 0 {
+		opt.PoolSize = 10 * runtime.NumCPU()
+	}
+
+	if opt.PoolTimeout == 0 {
+		if opt.ReadTimeout != 0 {
+			opt.PoolTimeout = opt.ReadTimeout + time.Second
+		} else {
+			opt.PoolTimeout = 30 * time.Second
+		}
+	}
+
+	if opt.IdleTimeout == 0 {
+		opt.IdleTimeout = 5 * time.Minute
+	}
+	if opt.IdleCheckFrequency == 0 {
+		opt.IdleCheckFrequency = time.Minute
+	}
+
+	switch opt.MinRetryBackoff {
+	case -1:
+		opt.MinRetryBackoff = 0
+	case 0:
+		opt.MinRetryBackoff = 250 * time.Millisecond
+	}
+	switch opt.MaxRetryBackoff {
+	case -1:
+		opt.MaxRetryBackoff = 0
+	case 0:
+		opt.MaxRetryBackoff = 4 * time.Second
+	}
+}
+
+func env(key, defValue string) string {
+	envValue := os.Getenv(key)
+	if envValue != "" {
+		return envValue
+	}
+	return defValue
+}
+
+// ParseURL parses an URL into options that can be used to connect to PostgreSQL.
+func ParseURL(sURL string) (*Options, error) {
+	parsedURL, err := url.Parse(sURL)
+	if err != nil {
+		return nil, err
+	}
+
+	// scheme
+	if parsedURL.Scheme != "postgres" && parsedURL.Scheme != "postgresql" {
+		return nil, errors.New("pg: invalid scheme: " + parsedURL.Scheme)
+	}
+
+	// host and port
+	options := &Options{
+		Addr: parsedURL.Host,
+	}
+	if !strings.Contains(options.Addr, ":") {
+		options.Addr += ":5432"
+	}
+
+	// username and password
+	if parsedURL.User != nil {
+		options.User = parsedURL.User.Username()
+
+		if password, ok := parsedURL.User.Password(); ok {
+			options.Password = password
+		}
+	}
+
+	if options.User == "" {
+		options.User = "postgres"
+	}
+
+	// database
+	if len(strings.Trim(parsedURL.Path, "/")) > 0 {
+		options.Database = parsedURL.Path[1:]
+	} else {
+		return nil, errors.New("pg: database name not provided")
+	}
+
+	// ssl mode
+	query, err := url.ParseQuery(parsedURL.RawQuery)
+	if err != nil {
+		return nil, err
+	}
+
+	if sslMode, ok := query["sslmode"]; ok && len(sslMode) > 0 {
+		switch sslMode[0] {
+		case "verify-ca", "verify-full":
+			options.TLSConfig = &tls.Config{}
+		case "allow", "prefer", "require":
+			options.TLSConfig = &tls.Config{InsecureSkipVerify: true} //nolint
+		case "disable":
+			options.TLSConfig = nil
+		default:
+			return nil, fmt.Errorf("pg: sslmode '%v' is not supported", sslMode[0])
+		}
+	} else {
+		options.TLSConfig = &tls.Config{InsecureSkipVerify: true} //nolint
+	}
+
+	delete(query, "sslmode")
+
+	if appName, ok := query["application_name"]; ok && len(appName) > 0 {
+		options.ApplicationName = appName[0]
+	}
+
+	delete(query, "application_name")
+
+	if connTimeout, ok := query["connect_timeout"]; ok && len(connTimeout) > 0 {
+		ct, err := strconv.Atoi(connTimeout[0])
+		if err != nil {
+			return nil, fmt.Errorf("pg: cannot parse connect_timeout option as int")
+		}
+		options.DialTimeout = time.Second * time.Duration(ct)
+	}
+
+	delete(query, "connect_timeout")
+
+	if len(query) > 0 {
+		return nil, errors.New("pg: options other than 'sslmode', 'application_name' and 'connect_timeout' are not supported")
+	}
+
+	return options, nil
+}
+
+func (opt *Options) getDialer() func(context.Context) (net.Conn, error) {
+	return func(ctx context.Context) (net.Conn, error) {
+		return opt.Dialer(ctx, opt.Network, opt.Addr)
+	}
+}
+
+func newConnPool(opt *Options) *pool.ConnPool {
+	return pool.NewConnPool(&pool.Options{
+		Dialer:  opt.getDialer(),
+		OnClose: terminateConn,
+
+		PoolSize:           opt.PoolSize,
+		MinIdleConns:       opt.MinIdleConns,
+		MaxConnAge:         opt.MaxConnAge,
+		PoolTimeout:        opt.PoolTimeout,
+		IdleTimeout:        opt.IdleTimeout,
+		IdleCheckFrequency: opt.IdleCheckFrequency,
+	})
+}