96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
/*
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Copyright 2022 GitHub Inc.
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See https://github.com/github/gh-ost/blob/master/LICENSE
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*/
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package base
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import (
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"fmt"
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"os"
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"regexp"
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"strings"
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"time"
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gosql "database/sql"
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"github.com/github/gh-ost/go/mysql"
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)
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var (
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prettifyDurationRegexp = regexp.MustCompile("([.][0-9]+)")
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)
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func PrettifyDurationOutput(d time.Duration) string {
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if d < time.Second {
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return "0s"
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}
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return prettifyDurationRegexp.ReplaceAllString(d.String(), "")
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}
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func FileExists(fileName string) bool {
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if _, err := os.Stat(fileName); err == nil {
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return true
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}
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return false
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}
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func TouchFile(fileName string) error {
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f, err := os.OpenFile(fileName, os.O_APPEND|os.O_CREATE, 0755)
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if err != nil {
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return err
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}
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return f.Close()
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}
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// StringContainsAll returns true if `s` contains all non empty given `substrings`
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// The function returns `false` if no non-empty arguments are given.
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func StringContainsAll(s string, substrings ...string) bool {
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nonEmptyStringsFound := false
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for _, substring := range substrings {
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if substring == "" {
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continue
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}
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if strings.Contains(s, substring) {
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nonEmptyStringsFound = true
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} else {
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// Immediate failure
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return false
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}
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}
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return nonEmptyStringsFound
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}
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func ValidateConnection(db *gosql.DB, connectionConfig *mysql.ConnectionConfig, migrationContext *MigrationContext, name string) (string, error) {
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versionQuery := `select @@global.version`
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var port, extraPort int
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var version string
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if err := db.QueryRow(versionQuery).Scan(&version); err != nil {
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return "", err
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}
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extraPortQuery := `select @@global.extra_port`
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if err := db.QueryRow(extraPortQuery).Scan(&extraPort); err != nil { // nolint:staticcheck
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// swallow this error. not all servers support extra_port
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}
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// AliyunRDS set users port to "NULL", replace it by gh-ost param
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// GCP set users port to "NULL", replace it by gh-ost param
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// Azure MySQL set users port to a different value by design, replace it by gh-ost para
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if migrationContext.AliyunRDS || migrationContext.GoogleCloudPlatform || migrationContext.AzureMySQL {
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port = connectionConfig.Key.Port
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} else {
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portQuery := `select @@global.port`
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if err := db.QueryRow(portQuery).Scan(&port); err != nil {
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return "", err
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}
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}
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if connectionConfig.Key.Port == port || (extraPort > 0 && connectionConfig.Key.Port == extraPort) {
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migrationContext.Log.Infof("%s connection validated on %+v", name, connectionConfig.Key)
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return version, nil
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} else if extraPort == 0 {
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return "", fmt.Errorf("Unexpected database port reported: %+v", port)
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} else {
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return "", fmt.Errorf("Unexpected database port reported: %+v / extra_port: %+v", port, extraPort)
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}
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}
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