woodpecker/store/datastore/utils.go
2017-02-11 12:12:34 -08:00

75 lines
1.7 KiB
Go

package datastore
import (
"strconv"
"strings"
"github.com/drone/drone/model"
"github.com/russross/meddler"
)
// rebind is a helper function that changes the sql
// bind type from ? to $ for postgres queries.
func rebind(query string) string {
if meddler.Default != meddler.PostgreSQL {
return query
}
qb := []byte(query)
// Add space enough for 5 params before we have to allocate
rqb := make([]byte, 0, len(qb)+5)
j := 1
for _, b := range qb {
switch b {
case '?':
rqb = append(rqb, '$')
for _, b := range strconv.Itoa(j) {
rqb = append(rqb, byte(b))
}
j++
case '`':
rqb = append(rqb, ' ')
default:
rqb = append(rqb, b)
}
}
return string(rqb)
}
// helper function that converts a simple repsitory list
// to a sql IN statment.
func toList(listof []*model.RepoLite) (string, []interface{}) {
var size = len(listof)
switch {
case meddler.Default == meddler.SQLite && size > 999:
size = 999
listof = listof[:999]
case size > 15000:
size = 15000
listof = listof[:15000]
}
var qs = make([]string, size, size)
var in = make([]interface{}, size, size)
for i, repo := range listof {
qs[i] = "?"
in[i] = repo.FullName
}
return strings.Join(qs, ","), in
}
// helper function that converts a simple repository list
// to a sql IN statement compatible with postgres.
func toListPostgres(listof []*model.RepoLite) (string, []interface{}) {
var size = len(listof)
if size > 15000 {
size = 15000
listof = listof[:15000]
}
var qs = make([]string, size, size)
var in = make([]interface{}, size, size)
for i, repo := range listof {
qs[i] = "$" + strconv.Itoa(i+1)
in[i] = repo.FullName
}
return strings.Join(qs, ","), in
}