feat(config): add config file

pkg/config/config.go

@@ -0,0 +1,55 @@
+// Package config provides defimition of .release.yml and read method
+package config
+
+import (
+	"io/ioutil"
+
+	log "github.com/sirupsen/logrus"
+	"gopkg.in/yaml.v2"
+)
+
+// ChangelogConfig struct
+type ChangelogConfig struct {
+	Print        string `yaml:"print,omitempty"`
+	Template     string `yaml:"template,omitempty"`
+	TemplatePath string `yaml:"templatePath,omitempty"`
+}
+
+// GithubConfig struct
+type GithubConfig struct {
+	URL string `yaml:"url"`
+}
+
+// GitlabConfig struct
+type GitlabConfig struct {
+	URL string `yaml:"url"`
+}
+
+// ReleaseConfig struct
+type ReleaseConfig struct {
+	CommitFormat string            `yaml:"commitFormat"`
+	Branch       map[string]string `yaml:"branch"`
+	Changelog    ChangelogConfig   `yaml:"changelog,omitempty"`
+	Release      string            `yaml:"release,omitempty"`
+	Github       map[string]string `yaml:"github"`
+	Gitlab       map[string]string `yaml:"gitlab"`
+}
+
+// Read ReleaseConfig
+func Read(configPath string) (*ReleaseConfig, error) {
+
+	content, err := ioutil.ReadFile(configPath)
+	if err != nil {
+		return &ReleaseConfig{}, err
+	}
+
+	var releaseConfig ReleaseConfig
+	err = yaml.Unmarshal(content, &releaseConfig)
+	if err != nil {
+		return &ReleaseConfig{}, err
+	}
+
+	log.Debugf("Found config %+v", releaseConfig)
+
+	return &releaseConfig, nil
+}