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HCL/TOMLศར
@linyows / Fukuoka.go
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@linyows / Tomohisa Oda
GMO pepabo, incٕज़ج൫νʔϜ
SCRAPTURE
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͓Βͤ
དྷि༵ʹ
5SBWJT.FFUVQJOԬɹ͕͋Γ·͢
5SBWJT$*ͷ)JSP"TBSJ͞Μ͕དྷʢདྷʣ͞ΕΔͷͰɺ͓Λ
ͬͨΓ࣭ͨ͠Γ͢ΔձͰ͢ɻ-5ืूதͰ͢ʂʂʂ
IUUQLJCBOEPPSLFFQFSKQFWFOUT
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ઃఆϑΝΠϧͲ͏ͯ͠Δʁ
JSON / YAML / GO…
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JSON
{
"foo": {
"bar": "hello",
"baz": {
"key": 7,
"hoge": true,
"values": [0, 1, 2]
}
}
}
• なんか冗長すぎる
• コメントが書けない
• Structにtag書くの面倒
• 記述に迷う事はない
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YAML
foo:
bar: hello
baz:
key: 7
hoge: off
on: 'true'
# comment~
values: [0, 1, 2]
fuga: !str 123
"999": ~
• シンプルに書ける（コンパクト）
• 色々な表現が出来る Anchor/Alias 型宣言
• 逆に敷居が高いのかも… キーにハイフンとか
• でもまあ、yamlで良い気がするけど
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͡Ό͋ GoͰ…
func MyConfig() *Config {
return &Config{
Bar: "hello",
Baz: BazConfig{
Key: 7,
Hoge: true,
Values: []int{1, 2, 3},
},
}
}
• ださい…し、Goの知識がない人はつらい
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HCL !?
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HCLͱ
HashiCorp Configuration Languageͷུ
Vagrant, Serf…ͱ͔ͷHashCorp
JSONޓ…
JSONYAMLΛผͳݴޠʹஔ͖͑ΔͷͰͳ͍ผͷϨΠϠʔ
JSONΛϑϨϯυϦʔʹͨ͠ͷ
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Grammar
hclData := `
a = "Easy!"
b {
c = 2
// comment~
d = [3, 4]
e = true
}
`
variable "foo" {
default = "bar"
description = "bar"
}
variable "amis" {
default = {
east = "foo"
}
}
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Decode
type Config struct {
A string
B struct {
C int
D []int
E bool
}
}
hclObject, _ := hcl.Parse(hclData)
fmt.Println(hclObject)
// &{ 7 [0x2081f0240 0x2081f0390 0x2081f0480 0x2081f0600 0x2081f0690]
}
fmt.Println(hclObject.Get("b", false).Get("e", false).Value)
// true
var c Config
hcl.DecodeObject(&c, hclObject)
fmt.Println(c)
// {Easy! {2 [3 4] true} false}
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TOML !?
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TOMLͱ
Tom's Obvious, Minimal Languageͷུ
Github Cofounderͷ Tom Preston-Werner (@mojombo)
ϑϨϯυϦʔͳಡΈॻ͖
ύʔαΛॻ͘ͷ͕؆୯Β͍͠
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Grammar
hclData := `
A = "Easy!"
!
[B]
C = 2
D = [3, 4]
E = true
`
title = "TOML Example"
!
[owner]
name = "Tom Preston-Werner"
organization = "GitHub"
bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
dob = 1979-05-27T07:32:00Z # First class dates? Why not?
!
[database]
server = "192.168.1.1"
ports = [ 8001, 8001, 8002 ]
connection_max = 5000
enabled = true
[servers]
!
# comment
[servers.alpha]
ip = "10.0.0.1"
dc = "eqdc10"
!
[servers.beta]
ip = "10.0.0.2"
dc = "eqdc10"
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Decode
type Config struct {
A string
B struct {
C int
D []int
E bool
}
}
var c Config
meta, _ := toml.Decode(tomlData, &config)
fmt.Println(config)
// {Easy! {2 [3 4] true}}
fmt.Println(meta)
// {map[A:Easy! B:map[D:[3 4] E:true C:2]] map[A:String B:Hash
B.C:Integer B.D:Array B.E:Bool] [[A] [B] [B C] [B D] [B E]]
map[B.C:true B.D:true B.E:true A:true B:true] []}
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͋Γ͕ͱ͏͍͟͝·ͨ͠