func (de *DebExplorer) fetchPackage(pack string) error {
//make sure that we always end up in curDir
defer os.Chdir(de.curDir)
var err error
var absPath string
//check if this a local file
if filepath.Ext(pack) != ".deb" {
if err = os.Chdir(de.tmpDir); err != nil {
return err
}
cmd := exec.Command("apt-get","download","-q",pack)
out, err := cmd.Output();
if err != nil {
return err
}
reg, err := regex.Compile("Get:[0-9]+ " + pack + " ([\S]+)")
if err != nil {
return err
}
m, err := reg.FindStringSubmatch(out)
if err != nil {
return err
}
name = pack+ "_" + m[1] + "_" + de.architecture + ".deb"
absPath = filepath.join(de.tmpDir,name)
} else {
if absPath, err = filepath.Abs(pack); err != nil {
return err
}
}
cmd := exec.Command("dpkg","-x",absPath,de.tmpDir)
if err = cmd.Run(); err != nil {
return err
}
return nil
}
func T(name string) *template.Template {
cachedMutex.Lock()
defer cachedMutex.unlock()
//this is a two value assignment test for existence of a key
//this returns a template and true or false, then, if true return t
//see http://blog.golang.org/go-maps-in-action - also has a good note on the use of "_"
if t, ok := cachedTemplates[name]; ok {
return t
}
t := template.New("_base.html").Funcs(funcs)
t = template.Must(t.ParseFiles(
"templates/_base.html",
filepath.join("templates", name),
))
}