/
update-presets.go
148 lines (132 loc) · 3.77 KB
/
update-presets.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
package main
import (
"bufio"
"fmt"
"net/http"
"os"
"regexp"
"sort"
"strings"
"github.com/alecthomas/kong"
"github.com/labstack/gommon/log"
"github.com/letsblockit/letsblockit/data"
"github.com/letsblockit/letsblockit/src/filters"
)
const (
presetFilePattern string = "data/filters/presets/%s/%s.txt"
uodfSourcePrefix string = "https://github.com/quenhus/uBlock-Origin-dev-filter/blob/"
bmrSource string = "https://github.com/rotgruengelb/BlockModReposting/blob/main/list.txt"
githubRawPrefix string = "https://raw.githubusercontent.com"
)
var (
githubPathPattern = regexp.MustCompile(`https://github.com/([-\w]+)/([-\w]+)/blob/(.*)`)
targets = map[string]func(file *filters.Template) error{
"search-results": updateSearchResults,
}
)
type updatePresetsCmd struct{}
func (c *updatePresetsCmd) Run(k *kong.Context) error {
repo, err := filters.Load(data.Templates, data.Presets)
if err != nil {
log.Fatal(err)
}
for name, f := range targets {
k.Printf("Updating presets for %s...", name)
template, err := repo.Get(name)
k.FatalIfErrorf(err, "unknown template %s", name)
k.FatalIfErrorf(f(template), "failed to process %s", name)
}
return nil
}
func updateSearchResults(template *filters.Template) error {
for _, param := range template.Params {
for _, preset := range param.Presets {
switch {
case strings.HasPrefix(preset.Source, uodfSourcePrefix):
values, err := fetchUodf(preset.Source)
if err != nil {
return fmt.Errorf("error fetching %s: %w", preset.Name, err)
}
if err = saveValues(template.Name, preset.Name, values); err != nil {
return err
}
case preset.Source == bmrSource:
values, err := fetchNetworkRules(preset.Source)
if err != nil {
return fmt.Errorf("error fetching %s: %w", preset.Name, err)
}
if err = saveValues(template.Name, preset.Name, values); err != nil {
return err
}
default:
return fmt.Errorf("error fetching %s: %s", preset.Name, "unknown source format")
}
}
}
return nil
}
func fetchUodf(url string) ([]string, error) {
file := buildGithubRawUrl(url)
fmt.Println(" downloading", file)
res, err := http.Get(file)
if err != nil {
return nil, err
}
var values []string
scanner := bufio.NewScanner(res.Body)
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(line, "!") || line == "" {
continue
}
line = strings.TrimPrefix(line, "*://*")
line = strings.TrimPrefix(line, "*://")
line = strings.TrimSuffix(line, "*")
values = append(values, line)
}
sort.Slice(values, func(i, j int) bool {
return strings.Compare(values[i], values[j]) < 0
})
return values, scanner.Err()
}
func fetchNetworkRules(url string) ([]string, error) {
file := buildGithubRawUrl(url)
fmt.Println(" downloading", file)
res, err := http.Get(file)
if err != nil {
return nil, err
}
ruleRe := regexp.MustCompile(`^\|\|(.*)\^\$all$`)
var values []string
scanner := bufio.NewScanner(res.Body)
for scanner.Scan() {
if match := ruleRe.FindStringSubmatch(scanner.Text()); len(match) == 2 {
values = append(values, match[1]+"/")
}
}
sort.Slice(values, func(i, j int) bool {
return strings.Compare(values[i], values[j]) < 0
})
return values, scanner.Err()
}
func buildGithubRawUrl(url string) string {
if parts := githubPathPattern.FindStringSubmatch(url); len(parts) == 4 {
parts[0] = githubRawPrefix
return strings.Join(parts, "/")
}
return url
}
func saveValues(template, preset string, values []string) error {
fileName := fmt.Sprintf(presetFilePattern, template, preset)
file, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return err
}
fmt.Println(" writing", fileName)
for _, v := range values {
if _, err = fmt.Fprintln(file, v); err != nil {
return err
}
}
return nil
}