Source file src/github.com/golang-migrate/migrate/v4/source/parse.go

Documentation: github.com/golang-migrate/migrate/v4/source

     1  package source
     2  
     3  import (
     4  	"fmt"
     5  	"regexp"
     6  	"strconv"
     7  )
     8  
     9  var (
    10  	ErrParse = fmt.Errorf("no match")
    11  )
    12  
    13  var (
    14  	DefaultParse = Parse
    15  	DefaultRegex = Regex
    16  )
    17  
    18  // Regex matches the following pattern:
    19  //  123_name.up.ext
    20  //  123_name.down.ext
    21  var Regex = regexp.MustCompile(`^([0-9]+)_(.*)\.(` + string(Down) + `|` + string(Up) + `)\.(.*)$`)
    22  
    23  // Parse returns Migration for matching Regex pattern.
    24  func Parse(raw string) (*Migration, error) {
    25  	m := Regex.FindStringSubmatch(raw)
    26  	if len(m) == 5 {
    27  		versionUint64, err := strconv.ParseUint(m[1], 10, 64)
    28  		if err != nil {
    29  			return nil, err
    30  		}
    31  		return &Migration{
    32  			Version:    uint(versionUint64),
    33  			Identifier: m[2],
    34  			Direction:  Direction(m[3]),
    35  			Raw:        raw,
    36  		}, nil
    37  	}
    38  	return nil, ErrParse
    39  }
    40  

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