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main.go
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main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"os"
"runtime"
)
const (
exitOK int = iota
exitError
)
type (
Project struct {
VCS string `json:"vcs"`
User string `json:"user"`
Repository string `json:"repository"`
}
Environment struct {
Name string `json:"name"`
Value string `json:"value"`
}
ProjectEnvironment struct {
Project Project `json:"project"`
Environments []Environment `json:"environments"`
}
Action struct {
Environment Environment
WillBe string
MessageFormat string
}
)
func load(enFile string) ([]ProjectEnvironment, error) {
raw, err := ioutil.ReadFile(enFile)
if err != nil {
return nil, err
}
var projectEnvironments []ProjectEnvironment
json.Unmarshal(raw, &projectEnvironments)
result, err := json.MarshalIndent(projectEnvironments, "", " ")
if err != nil {
return nil, err
}
if string(result) == "null" {
return nil, fmt.Errorf(fmt.Sprintf("Tried to parse %s. Got 'null' string as a result.", enFile))
}
drawLineWithMessage(fmt.Sprintf("Loaded %s", enFile))
fmt.Println(string(result))
return projectEnvironments, nil
}
func apply(localProjectEnvs []ProjectEnvironment, dryRun bool) error {
for _, localProjectEnv := range localProjectEnvs {
drawLineWithMessage(fmt.Sprintf("%s/%s", localProjectEnv.Project.User, localProjectEnv.Project.Repository))
remoteProjectEnv, err := getProjectEnvironment(localProjectEnv.Project)
if err != nil {
if err.Error() == "404 Not Found" {
fmt.Println("Coundn't access project. Check your config or token.")
continue
} else {
return err
}
}
actions := decideAction(localProjectEnv.Environments, remoteProjectEnv.Environments)
if len(actions) == 0 {
fmt.Println("No environment variables found in local json and Circle CI.")
}
for _, v := range actions {
if dryRun {
dryRunMessageFormat := fmt.Sprintf("\x1b[34mDryRun\x1b[0m: %s", v.MessageFormat)
fmt.Println(fmt.Sprintf(dryRunMessageFormat, v.WillBe, v.Environment.Name, v.Environment.Value))
} else {
switch v.WillBe {
case "created", "updated":
if err := addEnvironment(localProjectEnv.Project, v.Environment); err != nil {
return err
}
case "deleted":
if err := deleteEnvironment(localProjectEnv.Project, v.Environment.Name); err != nil {
return err
}
}
fmt.Println(fmt.Sprintf(v.MessageFormat, v.WillBe, v.Environment.Name, v.Environment.Value))
}
}
}
return nil
}
func export() error {
var projectEnvironments []ProjectEnvironment
projects, err := getProjects()
if err != nil {
return err
}
done := make(chan bool)
for _, project := range projects {
go func(project Project) {
projectEnvironment, err := getProjectEnvironment(project)
if err != nil {
fmt.Println(err)
return
}
projectEnvironments = append(projectEnvironments, projectEnvironment)
done <- true
}(project)
}
for n := 0; n < len(projects); n++ {
<-done
}
result, err := json.MarshalIndent(projectEnvironments, "", " ")
if err != nil {
return err
}
fmt.Println(string(result))
return nil
}
var token string // global
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
var (
enFile string
flagDryRun bool
flagApply bool
flagExport bool
flagVersion bool
flagHelp bool
)
flag.StringVar(&token, "token", "", "Circle CI API token.")
flag.StringVar(&enFile, "file", "en.json", "The path to the environment variabls file.")
flag.BoolVar(&flagDryRun, "dry-run", false, "The dry-run flag. This will be effected only with --apply.")
flag.BoolVar(&flagApply, "apply", false, "Apply environment variables to Circle CI from local variables file(en.json)")
flag.BoolVar(&flagExport, "export", false, "Export Circle CI environment variables in all of the projects that you have privilege.")
flag.BoolVar(&flagVersion, "version", false, "Print varsion.")
flag.BoolVar(&flagHelp, "help", false, "Show this usage.")
flag.Usage = func() {
fmt.Fprintln(os.Stderr, "Usage of en:")
flag.PrintDefaults()
}
flag.Parse()
exitWithPrintUsage := func(code int) {
flag.Usage()
os.Exit(code)
}
exitWithMessage := func(code int, message string) {
fmt.Println(message)
os.Exit(code)
}
setTokenFromOSEnvIfNotTokenOption := func() {
if token == "" {
token = os.Getenv("CIRCLE_TOKEN")
if token == "" {
exitWithMessage(exitError, "You need to set CIRCLE_TOKEN environment variables or -token option. Run 'en -help' to see usage.")
}
}
}
switch {
case flagHelp:
exitWithPrintUsage(exitOK)
case flagVersion:
exitWithMessage(exitOK, fmt.Sprintf("en version %s", version))
case flagExport:
setTokenFromOSEnvIfNotTokenOption()
if err := export(); err != nil {
exitWithMessage(exitError, err.Error())
}
case flagApply, flagDryRun:
setTokenFromOSEnvIfNotTokenOption()
if _, err := os.Stat(enFile); err != nil {
exitWithMessage(exitError, err.Error())
}
projectEnvs, err := load(enFile)
if err != nil {
exitWithMessage(exitError, err.Error())
}
if err := apply(projectEnvs, flagDryRun); err != nil {
exitWithMessage(exitError, err.Error())
}
default:
exitWithPrintUsage(exitOK)
}
}