英文:
Parse yaml files with "---" in it
问题
我正在使用https://github.com/go-yaml/yaml来解析yaml文件：
type TestConfig struct {
Test string `yaml:"test"`
}
yaml文件内容如下：
test: 123
---
test: 456
但是yaml.Unmarshal()只解析了第一个部分，我该如何解析剩余的部分呢？
英文:
I'm using https://github.com/go-yaml/yaml to parse yaml files:
type TestConfig struct {
Test string `yaml:"test"`
}
yaml file:
test: 123
---
test: 456
But yaml.Unmarshal() only parses the first segment, how can I parse the rest of it?
答案1
得分: 4
yaml.Unmarshal()只解析第一个片段，那么我如何解析其余部分呢？
yaml.Unmarshal的文档中提到（重点在于）：
Unmarshal解码输入字节切片中找到的第一个文档，并将解码后的值赋给输出值。
如果你想解码一系列的文档，请在数据流上调用yaml.NewDecoder()，然后多次调用解码器的.Decode(...)方法。使用io.EOF来标识记录的结束。
通常我会使用一个无限的for循环，并设置一个break条件：
decoder := yaml.NewDecoder(bytes.NewBufferString(data))
for {
var d Doc
if err := decoder.Decode(&d); err != nil {
if err == io.EOF {
break
}
panic(fmt.Errorf("Document decode failed: %w", err))
}
fmt.Printf("%+v\n", d)
}
fmt.Printf("All documents decoded")
(https://go.dev/play/p/01xdzDN0qB7)
英文:
> But yaml.Unmarshal() only parses the first segment, how can I parse the rest of it?
yaml.Unmarshal's doc says (emphasis mine):
> Unmarshal decodes the first document found within the in byte slice and assigns decoded values into the out value.
If you want to decode a series of documents, call yaml.NewDecoder() on a stream of your data and then call your decoder's .Decode(...) multiple times. Use io.EOF to identify the end of records.
I usually use an infinite for loop with a break condition for this:
decoder := yaml.NewDecoder(bytes.NewBufferString(data))
for {
var d Doc
if err := decoder.Decode(&d); err != nil {
if err == io.EOF {
break
}
panic(fmt.Errorf("Document decode failed: %w", err))
}
fmt.Printf("%+v\n", d)
}
fmt.Printf("All documents decoded")
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