Refactor gitlab to generic remotes

internal/remotes/projects/projects_net.go

@@ -0,0 +1,78 @@
+package projects
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"time"
+
+	giturl "github.com/whilp/git-urls"
+)
+
+const defNetDialTimeoutSecs = 5
+
+type GitlabProto int
+
+const (
+	GitlabProtoSSH GitlabProto = iota
+	GitlabProtoHTTP
+)
+
+var (
+	ErrUnknownHost error = errors.New("No addresses found for host")
+)
+
+func (p *Project) CheckHost(proto GitlabProto) error {
+	switch proto {
+	case GitlabProtoHTTP:
+		return p.checkHTTPRemote()
+	case GitlabProtoSSH:
+		return p.checkSSHRemote()
+	}
+	return errors.New("Unknown git protocol")
+}
+
+func (p *Project) checkHTTPRemote() error {
+	u, err := giturl.Parse(p.HTTPURLToRepo)
+	if err == nil {
+		err = p.checkHost(u)
+	}
+	return err
+}
+
+func (p *Project) checkSSHRemote() error {
+	u, err := giturl.Parse(p.SSHURLToRepo)
+	if err == nil {
+		err = p.checkHost(u)
+	}
+	return err
+}
+
+func (p *Project) checkHost(u *url.URL) error {
+	var port int
+	if u.Port() == "" {
+		switch u.Scheme {
+		case "http":
+			port = 80
+		case "ssh":
+			port = 22
+		case "https":
+			port = 443
+		}
+	} else {
+		port, _ = strconv.Atoi(u.Port())
+	}
+
+	d, err := net.DialTimeout("tcp",
+		fmt.Sprintf("%s:%d", u.Hostname(), port),
+		defNetDialTimeoutSecs*time.Second)
+
+	if err == nil {
+		_, err = d.Write([]byte("ok"))
+		d.Close()
+	}
+
+	return err
+}