1package parser
 2
 3import (
 4	"strconv"
 5	"strings"
 6	"time"
 7)
 8
 9type (
10	// https://wiki.alpinelinux.org/wiki/Apk_spec
11	Entry struct {
12		Checksum         string     // C
13		Version          string     // V
14		Name             string     // P
15		Architecture     *string    // A
16		PackageSize      int        // S
17		InstalledSize    int        // I
18		Description      string     // T
19		Url              string     // U
20		License          string     // L
21		Origin           *string    // o
22		Maintainer       *string    // m
23		BuildTime        *time.Time // t
24		Commit           *string    // c
25		ProviderPriority *int       // k
26		Dependencies     []string   // D
27		Provides         []string   // p
28		InstallIf        []string   // i
29	}
30)
31
32func ptr[T any](v T) *T {
33	return &v
34}
35
36func split(line string) (string, string) {
37	parts := strings.SplitN(line, ":", 2)
38	return parts[0], parts[1]
39}
40
41func toInt(v string) int {
42	i, _ := strconv.Atoi(v)
43	return i
44}
45
46func Parse(lines []string) *Entry {
47	entry := &Entry{}
48	for _, line := range lines {
49		r, c := split(line)
50		switch r {
51		case "C":
52			entry.Checksum = c
53		case "V":
54			entry.Version = c
55		case "P":
56			entry.Name = c
57		case "A":
58			entry.Architecture = &c
59		case "S":
60			entry.PackageSize = toInt(c)
61		case "I":
62			entry.InstalledSize = toInt(c)
63		case "T":
64			entry.Description = c
65		case "U":
66			entry.Url = c
67		case "L":
68			entry.License = c
69		case "o":
70			entry.Origin = &c
71		case "m":
72			entry.Maintainer = &c
73		case "t":
74			entry.BuildTime = ptr(time.Unix(int64(toInt(c)), 0))
75		case "c":
76			entry.Commit = &c
77		case "k":
78			entry.ProviderPriority = ptr(toInt(c))
79		case "D":
80			entry.Dependencies = strings.Split(c, " ")
81		case "p":
82			entry.Dependencies = strings.Split(c, " ")
83		case "i":
84			entry.Dependencies = strings.Split(c, " ")
85		}
86	}
87	return entry
88}