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
|
package main
import (
"fmt"
"errors"
"io"
"os/exec"
"os"
"log"
"net/http"
"strings"
)
func myexec(w io.Writer, main string, params ...string) error {
cmd := exec.Command(main, params...)
cmd.Stdout = w
cmd.Stderr = w
err := cmd.Run()
if err != nil {
fmt.Fprintf(w, "Failed to run: %s %s\n", main, strings.Join(params, " "))
}
return err
}
func update(w io.Writer) error {
fmt.Fprintf(w, "Start update...\n")
_, err := os.Stat("./.git")
if err != nil {
fmt.Fprintf(w, ".git folder does not exist, creating it...\n")
err := myexec(w, "git", "init")
if err != nil {
return err
}
}
err = myexec(w, "git", "remote", "get-url", "origin")
if err != nil {
repo, exists := os.LookupEnv("WEBPULL_REPO")
if !exists {
fmt.Fprintf(w, "You must define WEBPULL_REPO env variable...\n")
return errors.New("Missing environment variable WEBPULL_REPO")
}
fmt.Fprintf(w, "git remote is not yet set...\n")
err := myexec(w, "git", "remote", "add", "origin", repo)
if err != nil {
return err
}
}
err = myexec(w, "git", "pull", "origin", "master")
if err != nil {
fmt.Fprintf(w, "Failed to pull...\n")
return err
}
_, err = os.Stat("./.webpull")
if err != nil {
fmt.Fprintf(w, "You must create an executable file named '.webpull' at the root of your repository.\nIf you have nothing to run, just create an empty bash script...\n")
return err
}
err = myexec(w, "./.webpull")
if err != nil {
fmt.Fprintf(w, "An error occured during script execution\n")
return err
}
fmt.Fprintf(w, "Success.\n")
return nil
}
func main() {
token, exists := os.LookupEnv("WEBPULL_TOKEN")
if !exists {
log.Fatal("Environment variable 'WEBPULL_TOKEN' must be defined")
}
if update(os.Stdout) != nil {
log.Fatal("Initial 'update' failed")
}
fs := http.FileServer(http.Dir("./static"))
http.HandleFunc("/update", func(w http.ResponseWriter, r *http.Request) {
keys, ok := r.URL.Query()["token"]
if !ok || len(keys[0]) < 1 {
http.Error(w, "Missing 'token' query parameter", 401)
return
}
if keys[0] != token {
http.Error(w, "Wrong token", 401)
return
}
update(w)
})
http.Handle("/", fs)
log.Fatal(http.ListenAndServe(":8080", nil))
}
|
