detector.go RawHistoryFolder

1package backup
2
3import (
4	"strings"
5
6	"github.com/bnema/gordon/internal/domain"
7)
8
9// detectDatabaseFromAttachment maps a container attachment to DB metadata.
10func detectDatabaseFromAttachment(domainName string, a domain.Attachment) (domain.DBInfo, bool) {
11	image := strings.ToLower(a.Image)
12	name := strings.ToLower(a.Name)
13
14	switch {
15	case strings.Contains(image, "postgres"), strings.Contains(name, "postgres"):
16		port := 5432
17		hasPostgresPort := false
18		firstPositive := 0
19		for _, p := range a.Ports {
20			if p == 5432 {
21				port = 5432
22				hasPostgresPort = true
23				break
24			}
25			if p > 0 && firstPositive == 0 {
26				firstPositive = p
27			}
28		}
29		if !hasPostgresPort && firstPositive > 0 {
30			port = firstPositive
31		}
32		return domain.DBInfo{
33			Type:        domain.DBTypePostgreSQL,
34			Version:     postgresVersionFromImage(a.Image),
35			Domain:      domainName,
36			Name:        a.Name,
37			Host:        a.Name,
38			Port:        port,
39			ContainerID: a.ContainerID,
40			ImageName:   a.Image,
41		}, true
42	default:
43		return domain.DBInfo{}, false
44	}
45}
46
47func postgresVersionFromImage(image string) string {
48	lastColon := strings.LastIndex(image, ":")
49	if lastColon == -1 {
50		return ""
51	}
52	tag := strings.TrimSpace(image[lastColon+1:])
53	if tag == "" {
54		return ""
55	}
56
57	for i := 0; i < len(tag); i++ {
58		if tag[i] < '0' || tag[i] > '9' {
59			if i == 0 {
60				return ""
61			}
62			return tag[:i]
63		}
64	}
65
66	return tag
67}