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
|
package main
import (
_ "embed"
"errors"
"html/template"
"log"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/google/go-jsonnet/formatter"
)
var (
//go:embed static/index.tmpl
index string
tmpl = template.Must(template.New("").Parse(index))
)
func Index(repoURL, repoLocation string) http.HandlerFunc {
policyLocation := filepath.Join(repoLocation, "policy.jsonnet")
policyOutLocation := filepath.Join(repoLocation, "policy.hujson")
return func(w http.ResponseWriter, r *http.Request) {
fn := func(w http.ResponseWriter, r *http.Request) error {
repo, err := git.PlainOpen(repoLocation)
if err != nil {
return err
}
switch r.Method {
case http.MethodGet:
policyData, err := os.ReadFile(policyLocation)
if err != nil {
return err
}
content := string(policyData)
return tmpl.Execute(w, map[any]any{
"content": content,
"error": "",
})
case http.MethodPost:
formContent := r.FormValue("content")
formContent, err = formatter.Format("policy.jsonnet", formContent, formatter.DefaultOptions())
if err != nil {
return err
}
out, err := Transpile(strings.NewReader(formContent), repoURL)
if err != nil {
return err
}
if err := os.WriteFile(policyLocation, []byte(formContent), os.ModePerm); err != nil {
return err
}
if err := os.WriteFile(policyOutLocation, []byte(out), os.ModePerm); err != nil {
return err
}
tree, err := repo.Worktree()
if err != nil {
return err
}
if err := tree.AddGlob("policy.*"); err != nil {
return err
}
if _, err := tree.Commit("update policy via tailpolicy", &git.CommitOptions{
Author: &object.Signature{
Name: "tailpolicy",
Email: "tailpolicy@example.com",
When: time.Now(),
},
}); err != nil {
return err
}
if err := repo.Push(&git.PushOptions{}); err != nil {
return err
}
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
return nil
default:
return errors.New("method not allowed")
}
}
if err := fn(w, r); err != nil {
log.Printf("error during processing: %v", err)
tmpl.Execute(w, map[any]any{
"content": "",
"error": err.Error(),
})
}
}
}
|