diff --git a/functions.go b/functions.go
index 842c1be..1d36deb 100644
--- a/functions.go
+++ b/functions.go
@@ -14,12 +14,19 @@ import (
 )
 
 // GetConfig fetch configuration
-func GetConfig(configfile string, config *Config, globalconfig *GlobalConfig, githubconfig *GitHubConfig, gogsconfig *GogsConfig) {
+func GetConfig(config *Config) {
+	var configfile string
+
+	var globalconfig GlobalConfig
+	var githubconfig GitHubConfig
+	var gogsconfig GogsConfig
+
 	flag.Usage = Usage
+	flag.StringVar(&configfile, "configfile", "github-to-gogs.ini", "config file to use with github-to-gogs section")
 	flag.Parse()
 
 	cfg, err := ini.Load(configfile)
-	HandleError(err)
+	HandleFatalError(err)
 
 	globalsection := cfg.Section("global")
 	githubsection := cfg.Section("github")
@@ -48,96 +55,22 @@ func GetConfig(configfile string, config *Config, globalconfig *GlobalConfig, gi
 	gogsconfig.Mirror, err = gogssection.Key("mirror").Bool()
 	HandleError(err)
 
-	*config = Config{globalconfig: *globalconfig,
-		githubconfig: *githubconfig,
-		gogsconfig:   *gogsconfig}
+	*config = Config{globalconfig: globalconfig,
+		githubconfig: githubconfig,
+		gogsconfig:   gogsconfig}
 }
 
-// CheckGogsIsExistingRepo ...
-func CheckGogsIsExistingRepo(repo GitHubRepo) bool {
-	var isExists bool
-
-	client = &http.Client{}
-	resp = &http.Response{}
-
-	gogsrepourl := fmt.Sprintf(gogsconfig.RepoURLTmpl, gogsconfig.DestUsername, repo.Name)
-
-	req, err := http.NewRequest("GET", gogsrepourl, nil)
-	req.Header.Set("Authorization", gogsconfig.AuthToken)
-	req.Header.Set("User-Agent", globalconfig.UserAgent)
-
-	resp, err = client.Do(req)
-	HandleError(err)
-
-	if resp.StatusCode == 200 {
-		isExists = true
-	} else {
-		isExists = false
-	}
-
-	return isExists
-}
-
-// GetGogsUserUID ...
-func GetGogsUserUID(config *Config) {
-	var gogsorg GogsOrg
-	client = &http.Client{}
-	resp = &http.Response{}
-
-	gogsrepourl := fmt.Sprintf(config.gogsconfig.OrgsURLTmpl, config.gogsconfig.DestUsername)
-
-	req, err := http.NewRequest("GET", gogsrepourl, nil)
-	req.Header.Set("Authorization", config.gogsconfig.AuthToken)
-	req.Header.Set("User-Agent", config.globalconfig.UserAgent)
-
-	resp, err = client.Do(req)
-	HandleError(err)
-
-	err = json.Unmarshal(*GetResponseBody(resp), &gogsorg)
-	HandleError(err)
-
-	gogsconfig.UID = gogsorg.ID
-}
-
-// MigrateReposToGogs ...
-func MigrateReposToGogs(repolist []GitHubRepo) {
-	fmt.Println("Migrate repos to Gogs...")
-
-	client = &http.Client{}
-	resp = &http.Response{}
-
-	for _, elem := range repolist {
-		if !CheckGogsIsExistingRepo(elem) {
-			jsondata := fmt.Sprintf(`{"uid" : %d, "repo_name" : "%s" , "mirror" : %v, "clone_addr" : "%s"}`, gogsconfig.UID, elem.Name, true, elem.CloneURL)
-			fmt.Println(fmt.Sprintf("OK : Send migrating instruction for %s to gogs webservice", elem.Name))
-
-			req, err := http.NewRequest("POST", gogsconfig.MigrateURL, bytes.NewBufferString(jsondata))
-			HandleError(err)
-
-			req.Header.Add("Content-Type", gogsconfig.ContentType)
-			req.Header.Set("User-Agent", globalconfig.UserAgent)
-			req.Header.Set("Authorization", gogsconfig.AuthToken)
-
-			client.Timeout = globalconfig.RequestTimeout
-
-			resp, err = client.Do(req)
-			HandleError(err)
-		} else {
-			fmt.Println(fmt.Sprintf("KO : Not migrating, %s exists ", elem.Name))
-		}
-	}
-}
-
-// GetReposFromGitHub ...
-func GetReposFromGitHub() []GitHubRepo {
+// GetReposFromGitHub get starred repositories from github
+func GetReposFromGitHub(config *Config) []GitHubRepo {
 	var repolist []GitHubRepo
 	var repo []GitHubRepo
-	for num := 1; num <= githubconfig.MaxPagesNumber; num++ {
-		url := fmt.Sprintf(githubconfig.StarsPages, githubconfig.AuthUsername, num)
 
-		InvokeGitHub(url)
+	for num := 1; num <= config.githubconfig.MaxPagesNumber; num++ {
+		url := fmt.Sprintf(config.githubconfig.StarsPages, config.githubconfig.AuthUsername, num)
 
-		err = json.Unmarshal(*GetResponseBody(resp), &repo)
+		resp := InvokeGitHub(config, url)
+
+		err := json.Unmarshal(*GetResponseBody(resp), &repo)
 		HandleError(err)
 
 		for _, elem := range repo {
@@ -149,28 +82,101 @@ func GetReposFromGitHub() []GitHubRepo {
 }
 
 // InvokeGitHub ...
-func InvokeGitHub(url string) {
-	client = &http.Client{}
-	resp = &http.Response{}
-
+func InvokeGitHub(config *Config, url string) *http.Response {
 	req, err := http.NewRequest("GET", url, nil)
 	HandleError(err)
 
-	req.Header.Add("Content-Type", githubconfig.ContentType)
-	req.Header.Set("User-Agent", globalconfig.UserAgent)
-	req.SetBasicAuth(githubconfig.AuthUsername, githubconfig.AuthPassword)
+	req.Header.Add("Content-Type", config.githubconfig.ContentType)
+	req.Header.Set("User-Agent", config.globalconfig.UserAgent)
+	req.SetBasicAuth(config.githubconfig.AuthUsername, config.githubconfig.AuthPassword)
 
-	resp, err = client.Do(req)
+	client := &http.Client{}
+	resp, err := client.Do(req)
 	HandleError(err)
+
+	return resp
 }
 
-// GetResponseBody ...
+// GetResponseBody converts http responses bodies as bytes slice
 func GetResponseBody(resp *http.Response) *[]byte {
 	bodyBytes, err := ioutil.ReadAll(resp.Body)
 	HandleError(err)
 	return &bodyBytes
 }
 
+// CheckGogsExistingRepo checks if there's an existing repository in gogs
+func CheckGogsExistingRepo(config *Config, repo GitHubRepo) bool {
+	var isExists bool
+
+	gogsrepourl := fmt.Sprintf(config.gogsconfig.RepoURLTmpl, config.gogsconfig.DestUsername, repo.Name)
+
+	req, err := http.NewRequest("GET", gogsrepourl, nil)
+	req.Header.Set("Authorization", config.gogsconfig.AuthToken)
+	req.Header.Set("User-Agent", config.globalconfig.UserAgent)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	HandleError(err)
+
+	if resp.StatusCode == 200 {
+		isExists = true
+	} else {
+		isExists = false
+	}
+
+	return isExists
+}
+
+// GetGogsUserUID get the logued user identifier
+func GetGogsUserUID(config *Config) {
+	var gogsorg GogsOrg
+
+	gogsrepourl := fmt.Sprintf(config.gogsconfig.OrgsURLTmpl, config.gogsconfig.DestUsername)
+
+	req, err := http.NewRequest("GET", gogsrepourl, nil)
+	req.Header.Set("Authorization", config.gogsconfig.AuthToken)
+	req.Header.Set("User-Agent", config.globalconfig.UserAgent)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	HandleError(err)
+
+	err = json.Unmarshal(*GetResponseBody(resp), &gogsorg)
+	HandleError(err)
+
+	config.gogsconfig.UID = gogsorg.ID
+}
+
+// MigrateReposToGogs migrates input repositories to gogs
+func MigrateReposToGogs(config *Config, repolist []GitHubRepo) {
+	fmt.Println("Migrate repos to Gogs...")
+
+	client := &http.Client{}
+
+	for _, elem := range repolist {
+		if !CheckGogsExistingRepo(config, elem) {
+			jsondata := fmt.Sprintf(`{"uid" : %d, "repo_name" : "%s" , "mirror" : %v, "clone_addr" : "%s"}`, config.gogsconfig.UID, elem.Name, true, elem.CloneURL)
+			fmt.Println(fmt.Sprintf("Migrating repo %s to gogs rest api", elem.Name))
+
+			req, err := http.NewRequest("POST", config.gogsconfig.MigrateURL, bytes.NewBufferString(jsondata))
+			HandleError(err)
+
+			req.Header.Add("Content-Type", config.gogsconfig.ContentType)
+			req.Header.Set("User-Agent", config.globalconfig.UserAgent)
+			req.Header.Set("Authorization", config.gogsconfig.AuthToken)
+
+			client.Timeout = config.globalconfig.RequestTimeout
+
+			resp, err := client.Do(req)
+			HandleError(err)
+
+			fmt.Println(resp.StatusCode)
+		} else {
+			fmt.Println(fmt.Sprintf("Not migrating, %s exists in gogs", elem.Name))
+		}
+	}
+}
+
 // HandleError handles errors to return err
 func HandleError(err error) error {
 	if err != nil {
diff --git a/github-to-gogs.go b/github-to-gogs.go
index bb7b7ec..578d1d7 100644
--- a/github-to-gogs.go
+++ b/github-to-gogs.go
@@ -1,25 +1,9 @@
 package main
 
-import (
-	"flag"
-	"net/http"
-)
-
-var config Config
-var globalconfig GlobalConfig
-var githubconfig GitHubConfig
-var gogsconfig GogsConfig
-
-var err error
-var client *http.Client
-var resp *http.Response
-var configpath string
-
 func main() {
-	flag.StringVar(&configpath, "configfile", "github_to_gogs.ini", "config file to use with github_to_gogs section")
-	flag.Parse()
-	GetConfig(configpath, &config, &globalconfig, &githubconfig, &gogsconfig)
+	var config Config
+	GetConfig(&config)
 	GetGogsUserUID(&config)
-	repolist := GetReposFromGitHub()
-	MigrateReposToGogs(repolist)
+	repolist := GetReposFromGitHub(&config)
+	MigrateReposToGogs(&config, repolist)
 }