280 lines
7.2 KiB
Go
280 lines
7.2 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"sync"
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"gopkg.in/ini.v1"
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)
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// GetConfig fetch configuration
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func (config *Config) GetConfig() error {
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var configfile string
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var globalconfig GlobalConfig
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var githubconfig GitHubConfig
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var gogsconfig GogsConfig
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flag.Usage = Usage
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flag.StringVar(&configfile, "configfile", "github-to-gogs.ini", "config file to use with github-to-gogs section")
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flag.Parse()
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cfg, err := ini.Load(configfile)
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if err != nil {
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return err
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}
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globalsection := cfg.Section("global")
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githubsection := cfg.Section("github")
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gogssection := cfg.Section("gogs")
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globalconfig.UserAgent = globalsection.Key("user_agent").String()
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globalconfig.RequestTimeout, err = globalsection.Key("request_timeout").Duration()
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if err != nil {
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return err
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}
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globalconfig.Threads, err = globalsection.Key("threads").Int()
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if err != nil {
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return err
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}
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githubconfig.StarsPages = githubsection.Key("stars_pages").String()
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githubconfig.PageNum, err = githubsection.Key("page_num").Int()
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if err != nil {
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return err
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}
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githubconfig.MaxPerPage, err = githubsection.Key("max_per_page").Int()
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if err != nil {
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return err
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}
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githubconfig.AuthUsername = githubsection.Key("auth_username").String()
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githubconfig.AuthPassword = githubsection.Key("auth_password").String()
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githubconfig.ContentType = githubsection.Key("content_type").String()
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gogsconfig.Username = gogssection.Key("username").String()
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gogsconfig.DestUsername = gogssection.Key("dest_username").String()
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gogsconfig.RepoURLTmpl = gogssection.Key("repo_url_tmpl").String()
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gogsconfig.OrgsURLTmpl = gogssection.Key("orgs_url_tmpl").String()
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gogsconfig.MigrateURL = gogssection.Key("migrate_url").String()
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gogsconfig.AuthToken = gogssection.Key("auth_token").String()
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gogsconfig.ContentType = gogssection.Key("content_type").String()
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gogsconfig.Mirror, err = gogssection.Key("mirror").Bool()
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if err != nil {
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return err
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}
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*config = Config{globalconfig: globalconfig,
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githubconfig: githubconfig,
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gogsconfig: gogsconfig}
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return nil
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}
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// GetReposFromGitHub get starred repositories from github
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func GetReposFromGitHub(config *Config) ([]GitHubRepo, error) {
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var repolist []GitHubRepo
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var repo []GitHubRepo
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fmt.Println("Getting GitHub starred repos")
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for num := 1; num <= config.githubconfig.PageNum; num++ {
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url := fmt.Sprintf(config.githubconfig.StarsPages, config.githubconfig.AuthUsername, config.githubconfig.MaxPerPage, num)
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resp, err := InvokeGitHub(config, url)
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if err != nil {
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return nil, err
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}
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respbody, err := GetResponseBody(resp)
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if err != nil {
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return nil, err
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}
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err = json.Unmarshal(*respbody, &repo)
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if err != nil {
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return nil, err
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}
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for _, elem := range repo {
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repolist = append(repolist, elem)
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}
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}
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fmt.Println(fmt.Sprintf("%d repositories from Github fetched", len(repolist)))
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return repolist, nil
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}
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// InvokeGitHub ...
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func InvokeGitHub(config *Config, url string) (*http.Response, error) {
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, err
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}
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req.Header.Add("Content-Type", config.githubconfig.ContentType)
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req.Header.Set("User-Agent", config.globalconfig.UserAgent)
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req.SetBasicAuth(config.githubconfig.AuthUsername, config.githubconfig.AuthPassword)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetResponseBody converts http responses bodies as bytes slice
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func GetResponseBody(resp *http.Response) (*[]byte, error) {
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bodyBytes, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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return &bodyBytes, nil
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}
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// CheckGogsExistingRepo checks if there's an existing repository in gogs
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func CheckGogsExistingRepo(config *Config, repo GitHubRepo) (bool, error) {
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var isexists bool
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gogsrepourl := fmt.Sprintf(config.gogsconfig.RepoURLTmpl, config.gogsconfig.DestUsername, repo.Name)
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req, err := http.NewRequest("GET", gogsrepourl, nil)
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req.Header.Set("Authorization", config.gogsconfig.AuthToken)
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req.Header.Set("User-Agent", config.globalconfig.UserAgent)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil {
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return false, err
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}
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if resp.StatusCode == 200 {
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isexists = true
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} else if resp.StatusCode == 404 {
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isexists = false
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} else {
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err = fmt.Errorf("Can't determine error, cancelling, error %d in gogs webservice", resp.StatusCode)
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return false, err
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}
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return isexists, nil
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}
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// GetGogsUserUID get the logued user identifier
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func (config *Config) GetGogsUserUID() error {
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var gogsorg GogsOrg
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gogsrepourl := fmt.Sprintf(config.gogsconfig.OrgsURLTmpl, config.gogsconfig.DestUsername)
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req, err := http.NewRequest("GET", gogsrepourl, nil)
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if err != nil {
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return err
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}
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req.Header.Set("Authorization", config.gogsconfig.AuthToken)
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req.Header.Set("User-Agent", config.globalconfig.UserAgent)
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil {
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return err
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}
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if resp.StatusCode != 200 {
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err = errors.New("Error invoking gogs webservice")
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return err
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}
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respbody, err := GetResponseBody(resp)
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err = json.Unmarshal(*respbody, &gogsorg)
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if err != nil {
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err = errors.New("Failed to parse user ID from gogs webservice, check auth")
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return err
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}
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config.gogsconfig.UID = gogsorg.ID
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return nil
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}
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// RunMigration run threads for migration
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func RunMigration(config *Config, repolist []GitHubRepo) {
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repochan := make(chan GitHubRepo)
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done := make(chan bool)
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var wg sync.WaitGroup
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for thr := range make([]int, config.globalconfig.Threads) {
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go MigrateReposToGogs(config, &wg, repochan, done, thr)
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}
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for _, repo := range repolist {
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repochan <- repo
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}
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close(repochan)
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<-done
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wg.Wait()
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}
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// MigrateReposToGogs migrates input repositories to gogs
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func MigrateReposToGogs(config *Config, wg *sync.WaitGroup, jobs chan GitHubRepo, done chan bool, thr int) error {
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wg.Add(1)
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for {
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elem, more := <-jobs
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if more {
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client := &http.Client{}
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var resp *http.Response
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existingrepo, err := CheckGogsExistingRepo(config, elem)
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if err != nil {
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return err
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}
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if !existingrepo {
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jsondata := fmt.Sprintf(`{"uid" : %d, "repo_name" : "%s" , "mirror" : %v, "clone_addr" : "%s"}`, config.gogsconfig.UID, elem.Name, true, elem.CloneURL)
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req, err := http.NewRequest("POST", config.gogsconfig.MigrateURL, bytes.NewBufferString(jsondata))
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if err != nil {
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return err
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}
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req.Header.Add("Content-Type", config.gogsconfig.ContentType)
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req.Header.Set("User-Agent", config.globalconfig.UserAgent)
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req.Header.Set("Authorization", config.gogsconfig.AuthToken)
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client.Timeout = config.globalconfig.RequestTimeout
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fmt.Println(fmt.Sprintf("Migrating repo %s to gogs rest api", elem.Name))
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resp, err = client.Do(req)
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if err != nil {
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return err
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}
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if resp.StatusCode != 201 {
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err = fmt.Errorf("Error when migrating repo %s to gogs with status code %d on gogs webservice", elem.Name, resp.StatusCode)
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log.Println(err)
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}
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} else {
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fmt.Println(fmt.Sprintf("Not migrating, %s exists in gogs", elem.Name))
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}
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} else {
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fmt.Println(fmt.Sprintf("All repo migrated on thread num %d", thr))
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wg.Done()
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done <- true
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return nil
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}
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}
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}
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// Usage displays possible arguments
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func Usage() {
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flag.PrintDefaults()
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os.Exit(1)
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}
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