appvm/dot-desktop-fuse/main.go

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package main
import (
"bytes"
"context"
"io/ioutil"
"log"
"os"
"os/signal"
"path/filepath"
"regexp"
"syscall"
"github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse"
)
type ddf struct {
Path string
fs.Inode
}
func (r *ddf) OnAdd(ctx context.Context) {
files, err := ioutil.ReadDir(r.Path)
if err != nil {
log.Fatal(err)
}
for _, file := range files {
b, err := ioutil.ReadFile(filepath.Join(r.Path, file.Name()))
if err != nil {
log.Fatal(err)
}
b = bytes.ReplaceAll(b, []byte("Actions="), []byte("Actions=appvm;"))
raw := string(regexp.MustCompile("Exec=[a-zA-Z0-9]*").Find(b))
var app string
if len(raw) > 5 {
app = string(raw)[5:]
} else {
log.Println("Can't find Exec entry for", file.Name())
continue
}
b = append(b, []byte("\n[Desktop Action appvm]\n")...)
b = append(b, []byte("Name=Open in appvm\n")...)
b = append(b, []byte("Exec=appvm start "+app+"\n")...)
ch := r.NewPersistentInode(
ctx, &fs.MemRegularFile{
Data: b,
Attr: fuse.Attr{Mode: 0444},
}, fs.StableAttr{})
r.AddChild(file.Name(), ch, false)
}
}
var _ = (fs.NodeOnAdder)((*ddf)(nil))
func setupSigintHandler(server *fuse.Server) {
c := make(chan os.Signal)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
go func() {
<-c
server.Unmount()
os.Exit(1)
}()
}
func main() {
const from = "/var/run/current-system/sw/share/applications/"
to := filepath.Join(os.Getenv("HOME"), "/.local/share/applications")
os.MkdirAll(to, 0755)
server, err := fs.Mount(to, &ddf{Path: from}, nil)
if err != nil {
log.Fatal(err)
}
setupSigintHandler(server)
server.Wait()
}