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dump.go
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dump.go
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package main
import (
"database/sql"
"fmt"
"log"
"os"
"path"
"strings"
"text/template"
"time"
_ "github.com/go-sql-driver/mysql"
)
// Table ...
type Table struct {
Name string
SQL string
Values string
}
// Dump ...
type Dump struct {
Title string
Date time.Time
Tables []*Table
}
const createTableTemplate = `
-- -----------------------
-- Dump for: {{ .Title }}
-- Date: {{ .Date | dateExec }}
-- Execution time: {{ .Date | execTime }}
-- -----------------------
{{ range .Tables }}
--
-- Table structure for table "{{ .Name }}"
--
DROP TABLE IF EXISTS {{ .Name }};
{{.SQL}};
{{end}}
`
const insertTableTemplate = `
-- -----------------------
-- Dump for: {{ .Title }}
-- Date: {{ .Date | dateExec }}
-- Execution time: {{ .Date | execTime }}
-- -----------------------
{{ range .Tables }}
--
-- Dumping data for table {{ .Name }}
--
LOCK TABLES {{ .Name }} WRITE;
/*!40000 ALTER TABLE {{ .Name }} DISABLE KEYS */;
{{ if .Values }}
INSERT INTO {{ .Name }} VALUES {{ .Values }};
{{ end }}
/*!40000 ALTER TABLE {{ .Name }} ENABLE KEYS */;
UNLOCK TABLES;
{{ end }}
`
var reportCreate = template.Must(template.New("create").
Funcs(template.FuncMap{"execTime": execTime, "dateExec": dateExec}).
Parse(createTableTemplate))
var reportInsert = template.Must(template.New("insert").
Funcs(template.FuncMap{"execTime": execTime, "dateExec": dateExec}).
Parse(insertTableTemplate))
// Funcs(template.FuncMap{"dayAgo": daysAgo}).
// GetDump - make dump
func GetDump() *Dump {
// Open connection to database
db, err := sql.Open("mysql", connectionString())
checkErr(err, "Connection error")
defer db.Close()
tables, err := getTables(db)
checkErr(err, "Not found tables")
data := Dump{
Title: env["TITLE"],
Date: time.Now(),
Tables: make([]*Table, 0),
}
ignoreTables := make(map[string]bool)
if env["IGNORE_TABLES"] != "" {
ignoreTablesStrings := strings.Split(string(env["IGNORE_TABLES"]), "|")
for _, table := range ignoreTablesStrings {
ignoreTables[table] = true
}
}
for _, tableName := range tables {
if ignoreTables[tableName] {
continue
}
table, err := createTable(db, tableName)
checkErr(err, "Can't create `"+tableName+"`")
data.Tables = append(data.Tables, table)
}
// fmt.Println(data.Tables[0].SQL)
return &data
}
// MakeDumpFiles ...
func MakeDumpFiles(data *Dump, isInsert bool) {
// file
var fileName string
if isInsert {
fileName = "insert.sql"
} else {
fileName = "create.sql"
}
if env["DEBUG"] != "true" {
fileName = data.Date.Format("2006-01-02_15:04") + "_" + fileName
}
p := path.Join(env["DUMP_SUB_DIR"], fileName)
file, err := os.Create(p)
checkErr(err, "Can't crate file "+fileName)
defer file.Close()
// template
var report *template.Template
if isInsert {
report = reportInsert
} else {
report = reportCreate
}
if err := report.Execute(file, data); err != nil {
log.Fatal(err)
}
stat, err := file.Stat()
checkErr(err, "Can't get stat of file "+fileName)
size := stat.Size()
fmt.Println("📃 Created:", p)
fmt.Printf(" Size: %s \n", SizeToString(size))
}
func execTime(start time.Time) string {
elapsed := time.Since(start)
return fmt.Sprintf("%s", elapsed)
}
func dateExec(start time.Time) string {
return start.Format("2006-01-02 15:04")
}