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targets.go
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targets.go
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package rc
import (
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"github.com/concourse/atc"
"gopkg.in/yaml.v2"
)
var ErrNoTargetSpecified = errors.New("no target specified")
type UnknownTargetError struct {
TargetName TargetName
}
func (err UnknownTargetError) Error() string {
return fmt.Sprintf("unknown target: %s", err.TargetName)
}
type TargetProps struct {
API string `yaml:"api"`
TeamName string `yaml:"team"`
Insecure bool `yaml:"insecure,omitempty"`
Token *TargetToken `yaml:"token,omitempty"`
CACert string `yaml:"ca_cert,omitempty"`
}
type TargetToken struct {
Type string `yaml:"type"`
Value string `yaml:"value"`
}
type targetDetailsYAML struct {
Targets map[TargetName]TargetProps
}
func SaveTarget(
targetName TargetName,
api string,
insecure bool,
teamName string,
token *TargetToken,
caCert string,
) error {
flyTargets, err := LoadTargets()
if err != nil {
return err
}
flyrc := filepath.Join(userHomeDir(), ".flyrc")
newInfo := flyTargets.Targets[targetName]
newInfo.API = api
newInfo.Insecure = insecure
newInfo.Token = token
newInfo.TeamName = teamName
newInfo.CACert = caCert
flyTargets.Targets[targetName] = newInfo
return writeTargets(flyrc, flyTargets)
}
func selectTarget(selectedTarget TargetName) (TargetProps, error) {
if selectedTarget == "" {
return TargetProps{}, ErrNoTargetSpecified
}
flyTargets, err := LoadTargets()
if err != nil {
return TargetProps{}, err
}
target, ok := flyTargets.Targets[selectedTarget]
if !ok {
return TargetProps{}, UnknownTargetError{selectedTarget}
}
return target, nil
}
func userHomeDir() string {
if runtime.GOOS == "windows" {
home := os.Getenv("USERPROFILE")
if home == "" {
home = os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
}
if home == "" {
panic("could not detect home directory for .flyrc")
}
return home
}
return os.Getenv("HOME")
}
func LoadTargets() (*targetDetailsYAML, error) {
var flyTargets *targetDetailsYAML
flyrc := filepath.Join(userHomeDir(), ".flyrc")
if _, err := os.Stat(flyrc); err == nil {
flyTargetsBytes, err := ioutil.ReadFile(flyrc)
if err != nil {
return nil, fmt.Errorf("could not read %s", flyrc)
}
err = yaml.Unmarshal(flyTargetsBytes, &flyTargets)
if err != nil {
return nil, fmt.Errorf("could not unmarshal %s", flyrc)
}
}
if flyTargets == nil {
return &targetDetailsYAML{Targets: map[TargetName]TargetProps{}}, nil
}
for name, targetProps := range flyTargets.Targets {
if targetProps.TeamName == "" {
targetProps.TeamName = atc.DefaultTeamName
flyTargets.Targets[name] = targetProps
}
}
return flyTargets, nil
}
func writeTargets(configFileLocation string, targetsToWrite *targetDetailsYAML) error {
yamlBytes, err := yaml.Marshal(targetsToWrite)
if err != nil {
return fmt.Errorf("could not marshal %s", configFileLocation)
}
err = ioutil.WriteFile(configFileLocation, yamlBytes, os.ModePerm)
if err != nil {
return fmt.Errorf("could not write %s", configFileLocation)
}
return nil
}