feat(ci): check if running on a ci, else skip release

internal/ci/ci.go

@@ -0,0 +1,44 @@
+package ci
+
+import (
+	"fmt"
+	"github.com/Nightapes/go-semantic-release/internal/gitutil"
+	log "github.com/sirupsen/logrus"
+)
+
+//ProviderConfig struct
+type ProviderConfig struct {
+	IsPR     bool
+	PR       string
+	PRBranch string
+	Branch   string
+	Tag      string
+	Commit   string
+	BuildURL string
+	Service  string
+	Name     string
+}
+
+//Service interface
+type Service interface {
+	Detect() (*ProviderConfig, error)
+}
+
+//GetCIProvider get provider
+func GetCIProvider(gitUtil *gitutil.GitUtil) (*ProviderConfig, error) {
+
+	services := []Service{
+		Travis{},
+		Git{gitUtil: gitUtil}, // GIt must be the last option to check
+	}
+
+	for _, service := range services {
+		config, err := service.Detect()
+		if err == nil {
+			log.Infof("Found CI: %s", config.Name)
+			return config, nil
+		}
+		log.Debugf("%s", err.Error())
+	}
+	return nil, fmt.Errorf("could not find any CI, if running locally set env CI=true")
+}