Fixed ISO8601 format issue; Updated doucmentation and Makefile

Author: Barry Lagerweij

Makefile

@@ -3,3 +3,24 @@ build:
 
 run:
 	./dist/aws-sso-fetcher_darwin_amd64/aws-sso-fetcher hpydev_dev
+
+VERSION := $(shell cat ./VERSION)
+
+all: install
+
+
+install:
+	go install -v
+
+test:
+	go test ./... -v
+
+fmt:
+	go fmt ./... -v
+
+release:
+	git tag -a $(VERSION) -m "Release" || true
+	git push origin $(VERSION)
+	goreleaser --rm-dist
+
+.PHONY: install test fmt release

README.md

@@ -20,7 +20,10 @@ sso_account_id = 0123456789
 sso_role_name = AWSAdministratorAccess
 region = us-east-2
 output = json
+```
 
+And in your `~/.aws/credentials`, you'll need something like this:
+```ini
 [profile wrap_acme_dev]
 credential_process = /Users/alice/bin/aws-sso-fetcher acme_dev
 region = us-west-1
@@ -31,8 +34,7 @@ output = json
 Once you get SSO credentials with:
 
 ```bash
-export AWS_PROFILE=acme_dev
-aws sso login
+aws sso login --profile=acme_dev
 ```
 
 You can then start using software with the other wrapper profile:

main.go

@@ -32,7 +32,7 @@ type CredentialProcessJson struct {
 	AccessKeyID string `json:"AccessKeyId"`
 	SecretAccessKey string `json:"SecretAccessKey"`
 	SessionToken string `json:"SessionToken"`
-	Expiration time.Time `json:"Expiration"`
+	Expiration AWSTime `json:"Expiration"`
 }
 
 type Profile struct {
@@ -46,16 +46,20 @@ type AWSTime struct {
 	time.Time
 }
 
-func (t *AWSTime) UnmarshalJSON(buf []byte) error {
-
-	tt, err := time.Parse(time.RFC3339, strings.Trim(strings.Replace(string(buf), "UTC", "Z", 1), `"`))
-	if err != nil {
-		return err
+func (it *AWSTime) UnmarshalJSON(data []byte) error {
+	t, err := time.Parse("2006-01-02T15:04:05Z07:00", strings.Trim(strings.Replace(string(data), "UTC", "Z", 1), `"`))
+	if err == nil {
+		*it = AWSTime{t}
 	}
-	t.Time = tt
-	return nil
+
+	return err
+}
+
+func (it AWSTime) MarshalJSON() ([]byte, error) {
+	return []byte(fmt.Sprintf("\"%sZ\"", it.Time.UTC().Format("2006-01-02T15:04:05"))), nil
 }
 
+
 func main(){
 	zerolog.SetGlobalLevel(zerolog.InfoLevel)
 	_, ok := os.LookupEnv("DEBUG")
@@ -152,7 +156,7 @@ func getCachedFile(awsSsoCachePath, awsSSOProfileName string) (*CredentialProces
 	if err != nil {
 		return nil, err
 	}
-	if time.Now().After(credentialProcessJson.Expiration) {
+	if time.Now().After(credentialProcessJson.Expiration.Time) {
 		log.Debug().Str("expire", credentialProcessJson.Expiration.String()).Msg("credentials expired")
 		return nil, nil
 	}
@@ -197,7 +201,7 @@ func getSsoRoleCredentials(profile Profile, awsSSOCredential AWSSSOCredential) (
 		AccessKeyID:     *resp.RoleCredentials.AccessKeyId,
 		SecretAccessKey: *resp.RoleCredentials.SecretAccessKey,
 		SessionToken:    *resp.RoleCredentials.SessionToken,
-		Expiration:      aws.MillisecondsTimeValue(resp.RoleCredentials.Expiration),
+		Expiration:      AWSTime{aws.MillisecondsTimeValue(resp.RoleCredentials.Expiration)},
 	}, nil
 }