/
completer.go
290 lines (249 loc) · 7.52 KB
/
completer.go
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package aws_config_client
import (
"fmt"
"regexp"
"strings"
"github.com/AlecAivazis/survey/v2"
"github.com/AlecAivazis/survey/v2/terminal"
server "github.com/chanzuckerberg/aws-oidc/pkg/aws_config_server"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"gopkg.in/ini.v1"
)
const DefaultAWSRegion = "us-west-2"
type completer struct {
awsConfig *server.AWSConfig
prompt Prompt
defaultRegion string
defaultRoleName string
}
func NewCompleter(
prompt Prompt,
awsConfig *server.AWSConfig,
defaultRegion string,
defaultRoleName string,
) *completer {
return &completer{
awsConfig: awsConfig,
prompt: prompt,
defaultRegion: defaultRegion,
defaultRoleName: defaultRoleName,
}
}
func (c *completer) getAccountOptions(accounts []server.AWSAccount) []string {
accountOptions := []string{}
for _, account := range accounts {
accountOptions = append(
accountOptions,
fmt.Sprintf("%s (%s)", account.GetAliasOrName(), account.ID))
}
return accountOptions
}
func (c *completer) getRoleOptions(profiles []server.AWSProfile) []string {
roleOptions := []string{}
for _, profile := range profiles {
roleOptions = append(roleOptions, profile.RoleName)
}
return roleOptions
}
// Validates that the inputted aws profile name is a valid one
func (c *completer) awsProfileNameValidator(input interface{}) error {
inputString, ok := input.(string)
if !ok {
return errors.New("input not a string")
}
valid := regexp.MustCompile("^[a-zA-Z0-9_-]+$")
ok = valid.MatchString(inputString)
if !ok {
return errors.Errorf("Input (%s) not a valid AWS profile name", inputString)
}
return nil
}
func (c *completer) calculateDefaultProfileName(account server.AWSAccount) string {
invalid := regexp.MustCompile("[^a-zA-Z0-9_-]")
replaced := invalid.ReplaceAllString(account.GetAliasOrName(), "-")
return strings.ToLower(replaced)
}
func (c *completer) SurveyRegion() (string, error) {
if c.defaultRegion != "" {
return c.defaultRegion, nil
}
return c.prompt.Input(
"Please input your default AWS region:",
DefaultAWSRegion,
)
}
// SurveyProfile will ask a user to configure an aws profile
func (c *completer) SurveyProfile() (*AWSNamedProfile, error) {
// first prompt for account
accounts := c.awsConfig.GetAccounts()
accountIdx, err := c.prompt.Select(
"Select the AWS account you would like to configure for this profile:",
c.getAccountOptions(accounts),
)
if err != nil {
return nil, err
}
account := accounts[accountIdx]
// now ask for a role in that account
profiles := c.awsConfig.GetProfilesForAccount(account)
profileIdx, err := c.prompt.Select(
"Select the AWS role you would like to configure for this profile:",
c.getRoleOptions(profiles),
)
if err != nil {
return nil, err
}
profile := profiles[profileIdx]
// now attempt to name the profile
profileName, err := c.prompt.Input(
"What would you like to name this profile:",
c.calculateDefaultProfileName(account),
survey.WithValidator(c.awsProfileNameValidator),
)
if err != nil {
return nil, err
}
namedProfile := &AWSNamedProfile{
Name: profileName,
AWSProfile: profile,
}
return namedProfile, nil
}
// SurveyRole will ask a user to configure a default role
func (c *completer) SurveyRoles() ([]*AWSNamedProfile, error) {
// first prompt for roles
roles := c.awsConfig.GetRoleNames()
accounts := c.awsConfig.GetAccounts()
var targetRole string
if c.defaultRoleName == "" {
roleIdx, err := c.prompt.Select(
"Select the AWS role you would like to make default:",
roles,
)
if err != nil {
return nil, err
}
targetRole = roles[roleIdx]
} else {
targetRole = c.defaultRoleName
}
configuredProfiles := []*AWSNamedProfile{}
for _, account := range accounts {
profileName := c.calculateDefaultProfileName(account)
// get the roles associated with this account
profiles := c.awsConfig.GetProfilesForAccount(account)
for _, profile := range profiles {
// Initialize a new AWSNamedProfile
currentProfile := AWSNamedProfile{
AWSProfile: server.AWSProfile{
ClientID: profile.ClientID,
AWSAccount: profile.AWSAccount,
RoleARN: profile.RoleARN,
IssuerURL: profile.IssuerURL,
},
}
currentProfile.Name = fmt.Sprintf("%s-%s", profileName, profile.RoleName)
configuredProfiles = append(configuredProfiles, ¤tProfile)
if profile.RoleName == targetRole {
defaultProfile := AWSNamedProfile{
Name: profileName,
AWSProfile: server.AWSProfile{
ClientID: profile.ClientID,
AWSAccount: profile.AWSAccount,
RoleARN: profile.RoleARN,
IssuerURL: profile.IssuerURL,
},
}
configuredProfiles = append(configuredProfiles, &defaultProfile)
}
}
}
return configuredProfiles, nil
}
func (c *completer) SurveyProfiles() ([]*AWSNamedProfile, error) {
collectedProfiles := []*AWSNamedProfile{}
for {
currentProfile, err := c.SurveyProfile()
if err == terminal.InterruptErr {
logrus.Info("Process Interrupted.")
break
}
if err != nil {
return nil, err
}
collectedProfiles = append(collectedProfiles, currentProfile)
cnt, err := c.Continue()
if err != nil {
return nil, err
}
if !cnt {
break
}
}
return collectedProfiles, nil
}
func (c *completer) Survey() ([]*AWSNamedProfile, error) {
if c.defaultRoleName != "" {
return c.SurveyRoles()
}
configureOptions := []string{
"Automatically configure the same role for each account? (recommended)",
"Configure one role at a time? (advanced)"}
configureFuncs := []func() ([]*AWSNamedProfile, error){c.SurveyRoles, c.SurveyProfiles}
configureIdx, err := c.prompt.Select("How would you like to configure your AWS config?", configureOptions)
if err != nil {
return nil, err
}
return configureFuncs[configureIdx]()
}
func (c *completer) Continue() (bool, error) {
return c.prompt.Confirm("Would you like to configure another profile?", true)
}
func (c *completer) assembleAWSConfig(region string, profiles []*AWSNamedProfile) (*ini.File, error) {
out := ini.Empty()
for _, profile := range profiles {
profileSection := fmt.Sprintf("profile %s", profile.Name)
credsProcessValue := fmt.Sprintf(
"aws-oidc creds-process --issuer-url=%s --client-id=%s --aws-role-arn=%s",
profile.AWSProfile.IssuerURL,
profile.AWSProfile.ClientID,
profile.AWSProfile.RoleARN,
)
// First delete sections with this name so old configuration doesn't persist
out.DeleteSection(profileSection)
section, err := out.NewSection(profileSection)
if err != nil {
return nil, errors.Wrapf(err, "Unable to create %s section in AWS Config", profileSection)
}
section.Key(AWSConfigSectionOutput).SetValue("json")
section.Key(AWSConfigSectionCredentialProcess).SetValue(credsProcessValue)
section.Key(AWSConfigSectionRegion).SetValue(region)
}
return out, nil
}
func (c *completer) Complete(base *ini.File, awsConfigWriter AWSConfigWriter) error {
if len(c.awsConfig.Profiles) == 0 {
return errors.Errorf("You are not authorized for any AWS roles. Please contact your AWS administrator if this is a mistake")
}
// ask for a region, assume all profiles configured with this region
region, err := c.SurveyRegion()
if err != nil {
return err
}
// figure out the profiles
profiles, err := c.Survey()
if err != nil {
return err
}
newAWSProfiles, err := c.assembleAWSConfig(region, profiles)
if err != nil {
return err
}
mergedConfig, err := awsConfigWriter.MergeAWSConfigs(newAWSProfiles, base)
if err != nil {
return err
}
_, err = mergedConfig.WriteTo(awsConfigWriter)
return errors.Wrapf(err, "Could not write new aws config")
}