go: Split code into internal modules

This way I'll be able to reuse this code more easily.

Author: vHanda

src/gitjournal.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	git "github.com/gitjournal/go-git-dart/internal/git"
+	keygen "github.com/gitjournal/go-git-dart/internal/keygen"
 
 	/*
 	   #include <stdlib.h>
@@ -11,7 +13,7 @@ import (
 
 //export GitClone
 func GitClone(url *C.char, directory *C.char, privateKey *C.char, privateKeyLen C.int, password *C.char) *C.char {
-	err := gitClone(C.GoString(url), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
+	err := git.Clone(C.GoString(url), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
 	if err != nil {
 		return C.CString(err.Error())
 	}
@@ -21,7 +23,7 @@ func GitClone(url *C.char, directory *C.char, privateKey *C.char, privateKeyLen
 
 //export GitFetch
 func GitFetch(remote *C.char, directory *C.char, privateKey *C.char, privateKeyLen C.int, password *C.char) *C.char {
-	err := gitFetch(C.GoString(remote), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
+	err := git.Fetch(C.GoString(remote), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
 	if err != nil {
 		return C.CString(err.Error())
 	}
@@ -31,7 +33,7 @@ func GitFetch(remote *C.char, directory *C.char, privateKey *C.char, privateKeyL
 
 //export GitPush
 func GitPush(remote *C.char, directory *C.char, privateKey *C.char, privateKeyLen C.int, password *C.char) *C.char {
-	err := gitPush(C.GoString(remote), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
+	err := git.Push(C.GoString(remote), C.GoString(directory), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
 	if err != nil {
 		return C.CString(err.Error())
 	}
@@ -41,7 +43,7 @@ func GitPush(remote *C.char, directory *C.char, privateKey *C.char, privateKeyLe
 
 //export GitDefaultBranch
 func GitDefaultBranch(remoteUrl *C.char, privateKey *C.char, privateKeyLen C.int, password *C.char, outputBranchName **C.char) *C.char {
-	val, err := gitDefaultBranch(C.GoString(remoteUrl), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
+	val, err := git.DefaultBranch(C.GoString(remoteUrl), C.GoBytes(unsafe.Pointer(privateKey), privateKeyLen), C.GoString(password))
 	if err != nil {
 		return C.CString(err.Error())
 	}
@@ -52,7 +54,7 @@ func GitDefaultBranch(remoteUrl *C.char, privateKey *C.char, privateKeyLen C.int
 
 //export GJGenerateRSAKeys
 func GJGenerateRSAKeys(publicKey **C.char, privateKey **C.char) *C.char {
-	publicKeyVal, privateKeyVal, err := generateRSAKeys()
+	publicKeyVal, privateKeyVal, err := keygen.GenerateRSAKeys()
 	if err != nil {
 		return C.CString(err.Error())
 	}

src/git.go renamed to src/internal/git/git.go

@@ -1,4 +1,4 @@
-package main
+package git
 
 import (
 	"fmt"
@@ -27,7 +27,7 @@ func buildAuth(url string, privateKey []byte, password string) (transport.AuthMe
 	return publicKeys, nil
 }
 
-func gitClone(url string, directory string, privateKey []byte, password string) error {
+func Clone(url string, directory string, privateKey []byte, password string) error {
 	auth, err := buildAuth(url, privateKey, password)
 	if err != nil {
 		return err
@@ -67,7 +67,7 @@ func buildAuthForRemote(repo *git.Repository, remoteName string, privateKey []by
 	return buildAuth(urls[0], privateKey, password)
 }
 
-func gitFetch(remote string, directory string, privateKey []byte, password string) error {
+func Fetch(remote string, directory string, privateKey []byte, password string) error {
 	r, err := git.PlainOpen(directory)
 	if err != nil {
 		return err
@@ -90,7 +90,7 @@ func gitFetch(remote string, directory string, privateKey []byte, password strin
 	return nil
 }
 
-func gitPush(remote string, directory string, privateKey []byte, password string) error {
+func Push(remote string, directory string, privateKey []byte, password string) error {
 	r, err := git.PlainOpen(directory)
 	if err != nil {
 		return err
@@ -113,7 +113,7 @@ func gitPush(remote string, directory string, privateKey []byte, password string
 	return nil
 }
 
-func gitDefaultBranch(remoteUrl string, privateKey []byte, password string) (string, error) {
+func DefaultBranch(remoteUrl string, privateKey []byte, password string) (string, error) {
 	auth, err := buildAuth(remoteUrl, privateKey, password)
 	if err != nil {
 		return "", err

src/keygen.go renamed to src/internal/keygen/keygen.go

@@ -1,4 +1,4 @@
-package main
+package keygen
 
 import (
 	"crypto/rand"
@@ -15,7 +15,7 @@ import (
 
 // generateRSAKeys generates an RSA public/private key pair
 // and returns them as PEM encoded strings.
-func generateRSAKeys() (string, string, error) {
+func GenerateRSAKeys() (string, string, error) {
 	// Generate the private key
 	privateKey, err := rsa.GenerateKey(rand.Reader, 2048*2)
 	if err != nil {
@@ -47,7 +47,7 @@ func generateRSAKeys() (string, string, error) {
 		Bytes: publicKeyDER,
 	}
 	publicKeyPEM := string(pem.EncodeToMemory(publicKeyBlock))
-	publicKeyOpenSSH, err := PublicPEMtoOpenSSH([]byte(publicKeyPEM))
+	publicKeyOpenSSH, err := publicPEMtoOpenSSH([]byte(publicKeyPEM))
 	if err != nil {
 		return "", "", err
 	}
@@ -57,7 +57,7 @@ func generateRSAKeys() (string, string, error) {
 
 // Converts PEM public key to OpenSSH format to be used in authorized_keys file
 // Similar to: "ssh-keygen", "-i", "-m", "pkcs8", "-f", auth_keys_new_path
-func PublicPEMtoOpenSSH(pemBytes []byte) (string, error) {
+func publicPEMtoOpenSSH(pemBytes []byte) (string, error) {
 	// Decode and get the first block in the PEM file.
 	// In our case it should be the Public key block.
 	pemBlock, rest := pem.Decode(pemBytes)