Refactor repoFinder

- Remove io package and move finder to git package
- Move tempDir and writeFile into test package. They are only used for testing purposes anyway.
- Add a way to specify parent folder for tempDir. Useful for testing nested repos.
- Add new test repos with .git/config files

pkg/test/helpers.go

@@ -2,20 +2,26 @@ package test
 
 import (
 	"fmt"
-	"git-get/pkg/io"
 	"git-get/pkg/run"
+	"io/ioutil"
+	"os"
 	"path/filepath"
 	"testing"
 )
 
-func (r *Repo) writeFile(filename string, content string) {
-	path := filepath.Join(r.path, filename)
-	err := io.Write(path, content)
+func (r *Repo) init() {
+	err := run.Git("init", "--quiet", r.path).AndShutUp()
 	checkFatal(r.t, err)
 }
 
-func (r *Repo) init() {
-	err := run.Git("init", "--quiet", r.path).AndShutUp()
+// writeFile writes the content string into a file. If file doesn't exists, it will create it.
+func (r *Repo) writeFile(filename string, content string) {
+	path := filepath.Join(r.path, filename)
+
+	file, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	checkFatal(r.t, err)
+
+	_, err = file.Write([]byte(content))
 	checkFatal(r.t, err)
 }
 
@@ -45,7 +51,7 @@ func (r *Repo) checkout(name string) {
 }
 
 func (r *Repo) clone() *Repo {
-	dir, err := io.TempDir()
+	dir, err := tempDir("")
 	checkFatal(r.t, err)
 
 	url := fmt.Sprintf("file://%s/.git", r.path)
@@ -66,6 +72,14 @@ func (r *Repo) fetch() {
 	checkFatal(r.t, err)
 }
 
+// tempDir creates a temporary directory inside the parent dir.
+// If parent is empty it will use a system default temp dir (usually /tmp).
+func tempDir(parent string) (string, error) {
+	dir, err := ioutil.TempDir(parent, "git-get-repo-")
+
+	return dir, err
+}
+
 func checkFatal(t *testing.T, err error) {
 	if err != nil {
 		t.Fatalf("failed making test repo: %+v", err)