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main.go
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main.go
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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"sort"
"github.com/kelda/blimp/pkg/hash"
"github.com/kelda/blimp/pkg/syncthing"
)
func main() {
folders := syncthing.ArgsToMap(os.Args[1:])
err := syncthing.MakeMarkers(folders)
if err != nil {
panic(err)
}
if _, err := os.Stat("/pv/syncthing-config"); os.IsNotExist(err) {
err := os.MkdirAll("/pv/syncthing-config", 0644)
if err != nil {
panic(err)
}
}
homePath := fmt.Sprintf("/pv/syncthing-config/%s", configHash(folders))
if _, err := os.Stat(homePath); os.IsNotExist(err) {
// This homePath is new, so create it. Copy from /var/syncthing/config/
// to get certs.
cmd := exec.Command("cp", "-R", "/var/syncthing/config", homePath)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
fmt.Println(cmd)
err := cmd.Run()
if err != nil {
panic(err)
}
configFile := syncthing.MakeServer(folders)
configPath := filepath.Join(homePath, "config.xml")
err = ioutil.WriteFile(configPath, []byte(configFile), 0655)
if err != nil {
panic(err)
}
}
cmd := exec.Command("/bin/syncthing", "-verbose", "-home", homePath)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
panic(err)
}
}
func configHash(folders map[string]string) string {
type kv struct{Key, Value string}
slice := []kv{}
for k, v := range folders {
slice = append(slice, kv{k, v})
}
sort.Slice(slice, func(i, j int) bool {
return slice[i].Key < slice[j].Key
})
jsonBytes, err := json.Marshal(slice)
if err != nil {
panic(err)
}
return hash.Bytes(jsonBytes)
}