From 703d3020fbd28e233c94cb690fdd81a8626b8dc1 Mon Sep 17 00:00:00 2001
From: Carlos Alexandro Becker <caarlos0@gmail.com>
Date: Wed, 28 Dec 2016 23:39:31 -0200
Subject: [PATCH] fix tag

---
 git/tag.go | 11 ++++-------
 main.go    |  2 +-
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/git/tag.go b/git/tag.go
index 03ebc9632..823c8b6ed 100644
--- a/git/tag.go
+++ b/git/tag.go
@@ -3,18 +3,15 @@ package git
 import (
 	"os/exec"
 	"strings"
+	"errors"
 )
 
 func CurrentTag() (tag string, err error) {
 	return getTag("master")
 }
 
-func PreviousTag() (tag string, err error) {
-	current, err := CurrentTag()
-	if err != nil {
-		return tag, err
-	}
-	return getTag(current + "^")
+func PreviousTag(base string) (tag string, err error) {
+	return getTag(base + "^")
 }
 
 func getTag(ref string) (tag string, err error) {
@@ -28,7 +25,7 @@ func getTag(ref string) (tag string, err error) {
 	)
 	bts, err := cmd.CombinedOutput()
 	if err != nil {
-		return tag, err
+		return tag, errors.New(err.Error() + ": " + string(bts))
 	}
 	return strings.Split(string(bts), "\n")[0], err
 }
diff --git a/main.go b/main.go
index 9f23cb08c..dab6b2492 100644
--- a/main.go
+++ b/main.go
@@ -31,7 +31,7 @@ func main() {
 	if err != nil {
 		log.Fatalln("Failed to create archives", err.Error())
 	}
-	previousTag, err := git.PreviousTag()
+	previousTag, err := git.PreviousTag(tag)
 	if err != nil {
 		log.Fatalln("Failed to get previous tag name", err.Error())
 	}