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11_replace_builds_abort_hijack_urls_with_guid_and_endpoint.go
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11_replace_builds_abort_hijack_urls_with_guid_and_endpoint.go
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package migrations
import (
"database/sql"
"net/url"
"strings"
"github.com/concourse/atc/db/migration"
)
func ReplaceBuildsAbortHijackURLsWithGuidAndEndpoint(tx migration.LimitedTx) error {
_, err := tx.Exec(`ALTER TABLE builds ADD COLUMN guid varchar(36)`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds ADD COLUMN endpoint varchar(128)`)
if err != nil {
return err
}
cursor := 0
for {
var id int
var abortURLStr sql.NullString
err := tx.QueryRow(`
SELECT id, abort_url
FROM builds
WHERE id > $1
LIMIT 1
`, cursor).Scan(&id, &abortURLStr)
if err != nil {
if err == sql.ErrNoRows {
break
}
return err
}
cursor = id
if !abortURLStr.Valid {
continue
}
// determine guid + endpoint from abort url
//
// format should be http://foo.com:5050/builds/some-guid/abort
//
// best-effort; skip if not possible, not a big deal
abortURL, err := url.Parse(abortURLStr.String)
if err != nil {
continue
}
pathSegments := strings.Split(abortURL.Path, "/")
if len(pathSegments) != 4 {
continue
}
guid := pathSegments[2]
endpoint := abortURL.Scheme + "://" + abortURL.Host
_, err = tx.Exec(`
UPDATE builds
SET guid = $1, endpoint = $2
WHERE id = $3
`, guid, endpoint, id)
if err != nil {
continue
}
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN abort_url`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN hijack_url`)
if err != nil {
return err
}
return nil
}