Merge pull request #10 from luizvnasc/v2

correção do major v2

v2/error.go

@@ -0,0 +1,15 @@
+package gonfig
+
+const (
+	// LoadError = "Error loading the configuration"
+	LoadError = GonfigError("Error loading the configuration")
+	// UnsupportedFileError = "Unsupported file extension"
+	UnsupportedFileError = GonfigError("Unsupported file extension")
+)
+
+// GonfigError is an error in the module.
+type GonfigError string
+
+func (g GonfigError) Error() string {
+	return string(g)
+}

v2/examples/env/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/luizvnasc/gonfig/v2"
+)
+
+//Config struct to store the app configuration
+type Config struct {
+	Version     string `env:"VERSION"`
+	Description string `env:"DESCRIPTION"`
+	Redis       struct {
+		Host string `env:"REDIS_HOST"`
+		Port uint   `env:"REDIS_PORT"`
+	}
+}
+
+func main() {
+	var config Config
+	gonfig.Load(&config)
+	fmt.Printf("%v", config)
+}

v2/examples/json/config.json

@@ -0,0 +1,8 @@
+{
+    "version": "1.0.0",
+    "desc": "An example using json",
+    "redis": {
+        "host": "127.0.0.1",
+        "port": 6379
+    }
+}

v2/examples/json/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/luizvnasc/gonfig/v2"
+)
+
+//Config struct to store the app configuration
+type Config struct {
+	Version     string `json:"version"`
+	Description string `json:"desc"`
+	Redis       struct {
+		Host string `json:"host"`
+		Port uint   `json:"port"`
+	} `json:"redis"`
+}
+
+func main() {
+	var config Config
+	gonfig.Load(&config, "config.json")
+	fmt.Printf("%v", config)
+}

v2/examples/toml/config.toml

@@ -0,0 +1,5 @@
+version = "1.0.0"
+desc = "An example using toml"
+[redis]
+  host = "127.0.0.1"
+  port = 6379

v2/examples/toml/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/luizvnasc/gonfig/v2"
+)
+
+//Config struct to store the app configuration
+type Config struct {
+	Version     string `toml:"version"`
+	Description string `toml:"desc"`
+	Redis       struct {
+		Host string `toml:"host"`
+		Port uint   `toml:"port"`
+	} `toml:"redis"`
+}
+
+func main() {
+	var config Config
+	gonfig.Load(&config, "config.toml")
+	fmt.Printf("%v", config)
+}

v2/examples/xml/config.xml

@@ -0,0 +1,5 @@
+<config>
+    <version>1.0.0</version>
+    <description>A xml exemple</description>
+    <redis host="127.0.0.1" port="6379"/>
+</config>

v2/examples/xml/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/luizvnasc/gonfig/v2"
+)
+
+//Config struct to store the app configuration
+type Config struct {
+	Version     string `xml:"version"`
+	Description string `xml:"description"`
+	Redis       struct {
+		Host string `xml:"host,attr"`
+		Port uint   `xml:"port,attr"`
+	} `xml:"redis"`
+}
+
+func main() {
+	var config Config
+	gonfig.Load(&config, "config.xml")
+	fmt.Printf("%v", config)
+}

v2/examples/yaml/config.yaml

@@ -0,0 +1,5 @@
+version: 1.0.0
+desc: An example using yaml
+redis:
+  host: 127.0.0.1
+  port: 6379

v2/examples/yaml/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/luizvnasc/gonfig/v2"
+)
+
+//Config struct to store the app configuration
+type Config struct {
+	Version     string `yaml:"version"`
+	Description string `yaml:"desc"`
+	Redis       struct {
+		Host string `yaml:"host"`
+		Port uint   `yaml:"port"`
+	} `yaml:"redis"`
+}
+
+func main() {
+	var config Config
+	gonfig.Load(&config, "config.yaml")
+	fmt.Printf("%v", config)
+}

v2/go.mod

@@ -0,0 +1,10 @@
+module github.com/luizvnasc/gonfig/v2
+
+go 1.12
+
+require (
+	github.com/luizvnasc/goenv v0.0.0-20191218175301-c19dd8aa8023
+	github.com/pelletier/go-toml v1.6.0
+	gopkg.in/yaml.v2 v2.2.7 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2
+)

v2/go.sum

@@ -0,0 +1,15 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/luizvnasc/goenv v0.0.0-20191218175301-c19dd8aa8023 h1:ObI7S/YvYRFTNWeqWvn9TPsfqu64uo9DjDc4q+7hLVc=
+github.com/luizvnasc/goenv v0.0.0-20191218175301-c19dd8aa8023/go.mod h1:G9RRDiWXzqfsaLdNrhTWG2ceSs3dXQ2AAJuDQ3bR26M=
+github.com/pelletier/go-toml v1.6.0 h1:aetoXYr0Tv7xRU/V4B4IZJ2QcbtMUFoNb3ORp7TzIK4=
+github.com/pelletier/go-toml v1.6.0/go.mod h1:5N711Q9dKgbdkxHL+MEfF31hpT7l0S0s/t2kKREewys=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2 h1:XZx7nhd5GMaZpmDaEHFVafUZC7ya0fuo7cSJ3UCKYmM=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

v2/gonfig.go

@@ -0,0 +1,64 @@
+package gonfig
+
+import (
+	"encoding/json"
+	"encoding/xml"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/luizvnasc/goenv"
+	"github.com/pelletier/go-toml"
+	"gopkg.in/yaml.v3"
+)
+
+type unmarshalerFunc func(data []byte, v interface{}) error
+
+// Load a struct with the configuration from a config file.
+func Load(config interface{}, args ...string) error {
+	if len(args) == 0 {
+		err := goenv.Unmarshal(config)
+		return err
+	}
+	path := args[0]
+	unmarshaler, err := getUnmarshaler(path)
+	if err != nil {
+		return err
+	}
+	content, err := getFileContent(path)
+	if err != nil {
+		return LoadError
+	}
+	err = unmarshaler(content, config)
+	if err != nil {
+		return LoadError
+	}
+	return nil
+}
+
+func getUnmarshaler(path string) (unmarshalerFunc, error) {
+	ext := filepath.Ext(path)
+
+	switch {
+	case ext == ".json":
+		return json.Unmarshal, nil
+	case ext == ".xml":
+		return xml.Unmarshal, nil
+	case ext == ".yaml" || ext == ".yml":
+		return yaml.Unmarshal, nil
+	case ext == ".toml":
+		return toml.Unmarshal, nil
+	default:
+		return nil, UnsupportedFileError
+	}
+}
+
+func getFileContent(path string) (bytes []byte, err error) {
+	configFile, err := os.Open(path)
+	if err != nil {
+		return
+	}
+	defer configFile.Close()
+	bytes, err = ioutil.ReadAll(configFile)
+	return
+}