Merge pull request #43 from coveo/hash-source

Hash source to allow long directory names

config.go

@@ -75,6 +75,7 @@ type TGFConfigBuild struct {
 
 func (cb TGFConfigBuild) hash() string {
 	h := md5.New()
+	io.WriteString(h, filepath.Base(filepath.Dir(cb.source)))
 	io.WriteString(h, cb.Instructions)
 	if cb.Folder != "" {
 		filepath.Walk(cb.Dir(), func(path string, info os.FileInfo, err error) error {
@@ -106,7 +107,7 @@ func (cb TGFConfigBuild) GetTag() string {
 	if cb.Tag != "" {
 		return cb.Tag
 	}
-	return fmt.Sprintf("%s-%s", filepath.Base(filepath.Dir(cb.source)), cb.hash())
+	return cb.hash()
 }
 
 // InitConfig returns a properly initialized TGF configuration struct

config_test.go

@@ -110,7 +110,7 @@ func TestSetConfigDefaultValues(t *testing.T) {
 	assert.Equal(t, "RUN ls test", config.imageBuildConfigs[1].Instructions)
 	assert.Equal(t, "/abspath/my-folder", config.imageBuildConfigs[1].Folder)
 	assert.Equal(t, "/abspath/my-folder", config.imageBuildConfigs[1].Dir())
-	assert.Equal(t, "AWS-"+getHash(config.imageBuildConfigs[1].Instructions), config.imageBuildConfigs[1].GetTag())
+	assert.Equal(t, getHash([]string{"AWS", config.imageBuildConfigs[1].Instructions}), config.imageBuildConfigs[1].GetTag())
 
 	assert.Equal(t, "coveo/stuff", config.Image)
 	assert.Equal(t, "test", *config.ImageTag)
@@ -194,8 +194,10 @@ func randInt() int {
 	return random.Int()
 }
 
-func getHash(value string) string {
+func getHash(values []string) string {
 	h := md5.New()
-	io.WriteString(h, value)
+	for _, value := range values {
+		io.WriteString(h, value)
+	}
 	return fmt.Sprintf("%x", h.Sum(nil))
 }