// ReplaceEnv replaces environemt variables prefixed with '$' in given string.
func ReplaceEnv(s string) string {
return reEnv.ReplaceAllStringFunc(s, func(t string) string {
name := t[1:]
v := os.Getenv(name)
if len(v) == 0 {
log.Error("$%s is undefined", name)
}
return v
})
}
func (it *filterIter) Next() (bool, error) {
if it.closed {
return false, nil
}
// support limit
if it.limit > 0 && it.count >= it.limit {
it.close()
return false, nil
}
var k []byte
var v []byte
if !it.initialized {
it.initialized = true
tk, tv, err := it.init()
if err != nil {
return false, err
}
k, v = tk, tv
} else {
k, v = it.cursor.Next()
}
if k == nil {
it.close()
return false, nil
}
var err = it.filter(&k, &v)
if err != nil {
log.Error("filter failed: %v", err)
return false, err
}
if k == nil {
it.close()
return false, nil
}
it.k = k
it.v = v
return true, nil
}
func (it *filterIter) filter(k, v *[]byte) error {
if it.hasFilter {
for *k != nil {
var d map[string]interface{}
var err = json.Unmarshal(*v, &d)
if err != nil {
log.Error("json.Unmarshal failed: %v", err)
return err
}
if it.filterFn(string(*k), d) {
break
}
tk, tv := it.cursor.Next()
*k = tk
*v = tv
}
}
if *k != nil {
it.count++
}
return nil
}