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config: support loading config from yaml file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| package config | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "gopkg.in/yaml.v3" | ||
| ) | ||
|
|
||
| func Load(path string, conf interface{}) error { | ||
| buf, err := os.ReadFile(path) | ||
| if err != nil { | ||
| return fmt.Errorf("read file: %s: %w", path, err) | ||
| } | ||
|
|
||
| dec := yaml.NewDecoder(bytes.NewReader(buf)) | ||
| dec.KnownFields(true) | ||
|
|
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| if err := dec.Decode(conf); err != nil { | ||
| return fmt.Errorf("parse config: %s: %w", path, err) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package config | ||
|
|
||
| import ( | ||
| "os" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| type fakeConfig struct { | ||
| Foo string `yaml:"foo"` | ||
| Bar string `yaml:"bar"` | ||
| Sub fakeSubConfig `yaml:"sub"` | ||
| } | ||
|
|
||
| type fakeSubConfig struct { | ||
| Car int `yaml:"car"` | ||
| } | ||
|
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| func TestLoad(t *testing.T) { | ||
| t.Run("ok", func(t *testing.T) { | ||
| f, err := os.CreateTemp("", "pico") | ||
| assert.NoError(t, err) | ||
|
|
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| _, err = f.WriteString(`foo: val1 | ||
| bar: val2 | ||
| sub: | ||
| car: 5`) | ||
| assert.NoError(t, err) | ||
|
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| var conf fakeConfig | ||
| assert.NoError(t, Load(f.Name(), &conf)) | ||
|
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| assert.Equal(t, "val1", conf.Foo) | ||
| assert.Equal(t, "val2", conf.Bar) | ||
| assert.Equal(t, 5, conf.Sub.Car) | ||
| }) | ||
|
|
||
| t.Run("invalid yaml", func(t *testing.T) { | ||
| f, err := os.CreateTemp("", "pico") | ||
| assert.NoError(t, err) | ||
|
|
||
| _, err = f.WriteString(`invalid yaml...`) | ||
| assert.NoError(t, err) | ||
|
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| var conf fakeConfig | ||
| assert.Error(t, Load(f.Name(), &conf)) | ||
| }) | ||
|
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| t.Run("not found", func(t *testing.T) { | ||
| var conf fakeConfig | ||
| assert.Error(t, Load("notfound", &conf)) | ||
| }) | ||
| } |
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