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source.go
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source.go
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package sqlmigrate
import (
"strings"
"text/template"
"github.com/rubenv/sql-migrate"
)
type TemplateMigrationSource struct {
OriginSource migrate.MigrationSource
Data interface{}
}
func (s TemplateMigrationSource) FindMigrations() (migrations []*migrate.Migration, err error) {
migrations, err = s.OriginSource.FindMigrations()
if err != nil {
return
}
for _, migration := range migrations {
var ups []string
var downs []string
for _, up := range migration.Up {
var out string
out, err = s.ExecuteTemplate(up)
if err != nil {
return
}
ups = append(ups, out)
}
for _, down := range migration.Down {
var out string
out, err = s.ExecuteTemplate(down)
if err != nil {
return
}
downs = append(downs, out)
}
migration.Up = ups
migration.Down = downs
}
return
}
func (s TemplateMigrationSource) ExecuteTemplate(input string) (out string, err error) {
tmpl, err := template.New("sql").Parse(input)
if err != nil {
return
}
buf := strings.Builder{}
err = tmpl.Execute(&buf, s.Data)
if err != nil {
return
}
out = buf.String()
return
}