adding rust, fixing python/php, adding ability to detect rusts src/main.rs file

fn/langs/base.go

@@ -2,8 +2,8 @@ package langs
 
 import (
 	"errors"
-	"os"
 	"fmt"
+	"os"
 )
 
 var (
@@ -20,7 +20,7 @@ func GetLangHelper(lang string) LangHelper {
 	case "ruby":
 		return &RubyLangHelper{}
 	case "python":
-		return &PythonHelper{}
+		return &PythonLangHelper{}
 	case "php":
 		return &PhpLangHelper{}
 	case "rust":
@@ -54,8 +54,8 @@ type LangHelper interface {
 type BaseHelper struct {
 }
 
-func (h *BaseHelper) Cmd() string { return "" }
-func (h *BaseHelper) HasBoilerplate() bool { return false }
+func (h *BaseHelper) Cmd() string                { return "" }
+func (h *BaseHelper) HasBoilerplate() bool       { return false }
 func (h *BaseHelper) GenerateBoilerplate() error { return nil }
 
 func exists(name string) bool {
@@ -69,4 +69,4 @@ func exists(name string) bool {
 
 func dockerBuildError(err error) error {
 	return fmt.Errorf("error running docker build: %v", err)
-}
+}

fn/langs/python.go

@@ -7,20 +7,20 @@ import (
 	"strings"
 )
 
-type PythonHelper struct {
+type PythonLangHelper struct {
 	BaseHelper
 }
 
-func (lh *PythonHelper) Entrypoint() string {
+func (lh *PythonLangHelper) Entrypoint() string {
 	return "python2 func.py"
 }
 
-func (lh *PythonHelper) HasPreBuild() bool {
+func (lh *PythonLangHelper) HasPreBuild() bool {
 	return true
 }
 
 // PreBuild for Go builds the binary so the final image can be as small as possible
-func (lh *PythonHelper) PreBuild() error {
+func (lh *PythonLangHelper) PreBuild() error {
 	wd, err := os.Getwd()
 	if err != nil {
 		return err
@@ -40,6 +40,6 @@ func (lh *PythonHelper) PreBuild() error {
 	return nil
 }
 
-func (lh *PythonHelper) AfterBuild() error {
+func (lh *PythonLangHelper) AfterBuild() error {
 	return nil
 }