examples: review, testing and documentation (#176)

* examples reviews, testing and documentation

* including the execution on travis, and fix readme

* fix example link

* including the execution on travis

1 files changed, 12 insertions, 29 deletions

diff --git a/examples/storage/main.go b/examples/storage/main.go
index d85f8e9..b047e43 100644
--- a/examples/storage/main.go
+++ b/examples/storage/main.go
@@ -6,29 +6,29 @@ import (
 	"strings"
 
 	"gopkg.in/src-d/go-git.v4"
+	. "gopkg.in/src-d/go-git.v4/examples"
 	"gopkg.in/src-d/go-git.v4/examples/storage/aerospike"
 
 	driver "github.com/aerospike/aerospike-client-go"
-	"github.com/fatih/color"
 )
 
 func main() {
-	checkArgs()
+	CheckArgs("<clone|log>", "<url>")
 	action := os.Args[1]
 	url := os.Args[2]
 
 	// Aerospike client to be used by the custom storage
 	client, err := driver.NewClient("127.0.0.1", 3000)
-	checkIfError(err)
+	CheckIfError(err)
 
 	// New instance of the custom aerospike storage, all the objects,
 	// references and configuration is saved to aerospike
 	s, err := aerospike.NewStorage(client, "test", url)
-	checkIfError(err)
+	CheckIfError(err)
 
 	// A new repository instance using as storage the custom implementation
 	r, err := git.NewRepository(s)
-	checkIfError(err)
+	CheckIfError(err)
 
 	switch action {
 	case "clone":
@@ -43,24 +43,23 @@ func main() {
 func clone(r *git.Repository, url string) {
 	// Clone the given repository, all the objects, references and
 	// configuration sush as remotes, are save into the Aerospike database.
-	// > git clone <url>
-	color.Blue("git clone %s", url)
+	Info("git clone %s", url)
+
 	err := r.Clone(&git.CloneOptions{URL: url})
-	checkIfError(err)
+	CheckIfError(err)
 }
 
 func log(r *git.Repository) {
 	// Prints the history of the repository starting in the current HEAD, the
 	// objects are retrieved from Aerospike database.
-	// > git log --oneline
-	color.Blue("git log --oneline")
+	Info("git log --oneline")
 
 	ref, err := r.Head()
-	checkIfError(err)
+	CheckIfError(err)
 	commit, err := r.Commit(ref.Hash())
-	checkIfError(err)
+	CheckIfError(err)
 	commits, err := commit.History()
-	checkIfError(err)
+	CheckIfError(err)
 
 	for _, c := range commits {
 		hash := c.Hash.String()
@@ -68,19 +67,3 @@ func log(r *git.Repository) {
 		fmt.Println(hash[:7], line[0])
 	}
 }
-
-func checkIfError(err error) {
-	if err == nil {
-		return
-	}
-
-	color.Red("error: %s", err)
-	os.Exit(1)
-}
-
-func checkArgs() {
-	if len(os.Args) < 3 {
-		color.Cyan("Usage: %s <clone|log> <url>", os.Args[0])
-		os.Exit(1)
-	}
-}