Add option for loading multiple env files from folder(s)

.gitignore

@@ -1 +1,5 @@
 .DS_Store
+.idea
+
+try
+go.mod

godotenv.go

@@ -20,6 +20,7 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"regexp"
 	"sort"
 	"strings"
@@ -37,16 +38,32 @@ const doubleQuoteSpecialChars = "\\\n\r\"!$`"
 //
 //		godotenv.Load("fileone", "filetwo")
 //
+// Also, you can tell it a folder name, and it would crawl the folder tree and load all the env files
+//
+//      godotenv.Load("fixtures")
+//
 // It's important to note that it WILL NOT OVERRIDE an env variable that already exists - consider the .env file to set dev vars or sensible defaults
 func Load(filenames ...string) (err error) {
 	filenames = filenamesOrDefault(filenames)
+	paths := make([]string, 0)
 
 	for _, filename := range filenames {
-		err = loadFile(filename, false)
-		if err != nil {
-			return // return early on a spazout
+		if _, err = os.Stat(filename); !os.IsNotExist(err) {
+			paths, err = folders(filenames)
+			for _, p := range paths {
+				err = loadFile(p, false)
+				if err != nil {
+					return
+				}
+			}
+		}else{
+			err = loadFile(filename, false)
+			if err != nil {
+				return // return early on a spazout
+			}
 		}
 	}
+
 	return
 }
 
@@ -60,14 +77,30 @@ func Load(filenames ...string) (err error) {
 //
 //		godotenv.Overload("fileone", "filetwo")
 //
+// Also, you can tell it a folder name, and it would crawl the folder tree and load all the env files
+//
+//      godotenv.Overload("fixtures")
+//
+//
 // It's important to note this WILL OVERRIDE an env variable that already exists - consider the .env file to forcefilly set all vars.
 func Overload(filenames ...string) (err error) {
 	filenames = filenamesOrDefault(filenames)
+	paths := make([]string, 0)
 
 	for _, filename := range filenames {
-		err = loadFile(filename, true)
-		if err != nil {
-			return // return early on a spazout
+		if _, err = os.Stat(filename); !os.IsNotExist(err) {
+			paths, err = folders(filenames)
+			for _, p := range paths {
+				err = loadFile(p, true)
+				if err != nil {
+					return
+				}
+			}
+		}else{
+			err = loadFile(filename, true)
+			if err != nil {
+				return // return early on a spazout
+			}
 		}
 	}
 	return
@@ -182,6 +215,28 @@ func filenamesOrDefault(filenames []string) []string {
 	return filenames
 }
 
+func folders(folders []string) ([]string, error) {
+	paths := make([]string, 0)
+
+	for _, folder := range folders {
+		err := filepath.Walk(folder, func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+
+			if ext := filepath.Ext(path); ext == ".env" {
+				paths = append(paths, path)
+			}
+			return nil
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return paths, nil
+}
+
 func loadFile(filename string, overload bool) error {
 	envMap, err := readFile(filename)
 	if err != nil {

godotenv_test.go

@@ -40,6 +40,18 @@ func loadEnvAndCompareValues(t *testing.T, loader func(files ...string) error, e
 	}
 }
 
+func compareTotal(t *testing.T, loader func(files []string) ([]string, error), envFolderName []string,  expectedNum int) {
+	values, err := loader(envFolderName)
+	if err != nil {
+		t.Fatalf("Error loading %v", envFolderName)
+	}
+
+	if len(values) != expectedNum {
+		t.Errorf("wrong number of files fetched: expected, %v got %v", len(values), expectedNum)
+	}
+
+}
+
 func TestLoadWithNoArgsLoadsDotEnv(t *testing.T) {
 	err := Load()
 	pathError := err.(*os.PathError)
@@ -416,6 +428,13 @@ func TestErrorReadDirectory(t *testing.T) {
 	}
 }
 
+func TestLoadMultipleEnvFiles(t *testing.T) {
+	folderName := []string{"fixtures"}
+	expectedFilesNum := 6
+
+	compareTotal(t, folders, folderName, expectedFilesNum)
+}
+
 func TestErrorParsing(t *testing.T) {
 	envFileName := "fixtures/invalid1.env"
 	envMap, err := Read(envFileName)