From e36d67e753a72c529ff7e5519927a95c809d17fd Mon Sep 17 00:00:00 2001
From: Josh Padnick <josh.padnick@gmail.com>
Date: Thu, 28 Apr 2016 17:03:38 -0700
Subject: [PATCH] Fix issue where fetch did not download commits or branches
 from private repos.

---
 file.go      | 21 ++++++++++-----------
 file_test.go |  2 ++
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/file.go b/file.go
index 613a8a8..ae79c20 100644
--- a/file.go
+++ b/file.go
@@ -37,19 +37,16 @@ func downloadGithubZipFile(gitHubCommit GitHubCommit, gitHubToken string) (strin
 	if err != nil {
 		return zipFilePath, wrapError(err)
 	}
-
-	// Load the resp.Body into a buffer so we can convert it to a string or []bytes as necessary
-	respBodyBuffer := new(bytes.Buffer)
-	respBodyBuffer.ReadFrom(resp.Body)
-
 	if resp.StatusCode != 200 {
-		return zipFilePath, newError(FAILED_TO_DOWNLOAD_FILE, fmt.Sprintf("Failed to download file at the url %s. Received HTTP Response %d. Body: %s", req.URL.String(), resp.StatusCode, respBodyBuffer.String()))
+		return zipFilePath, newError(FAILED_TO_DOWNLOAD_FILE, fmt.Sprintf("Failed to download file at the url %s. Received HTTP Response %d.", req.URL.String(), resp.StatusCode))
 	}
 	if resp.Header.Get("Content-Type") != "application/zip" {
 		return zipFilePath, newError(FAILED_TO_DOWNLOAD_FILE, fmt.Sprintf("Failed to download file at the url %s. Expected HTTP Response's \"Content-Type\" header to be \"application/zip\", but was \"%s\"", req.URL.String(), resp.Header.Get("Content-Type")))
 	}
 
 	// Copy the contents of the downloaded file to our empty file
+	respBodyBuffer := new(bytes.Buffer)
+	respBodyBuffer.ReadFrom(resp.Body)
 	err = ioutil.WriteFile(filepath.Join(tempDir, "repo.zip"), respBodyBuffer.Bytes(), 0644)
 	if err != nil {
 		return zipFilePath, wrapError(err)
@@ -120,18 +117,20 @@ func extractFiles(zipFilePath, filesToExtractFromZipPath, localPath string) erro
 func MakeGitHubZipFileRequest(gitHubCommit GitHubCommit, gitHubToken string) (*http.Request, error) {
 	var request *http.Request
 
-	var url string
-
+	// This represents either a commit, branch, or git tag
+	var gitRef string
 	if gitHubCommit.CommitSha != "" {
-		url = fmt.Sprintf("https://github.com/%s/%s/archive/%s.zip", gitHubCommit.Repo.Owner, gitHubCommit.Repo.Name, gitHubCommit.CommitSha)
+		gitRef = gitHubCommit.CommitSha
 	} else if gitHubCommit.BranchName != "" {
-		url = fmt.Sprintf("https://github.com/%s/%s/archive/%s.zip", gitHubCommit.Repo.Owner, gitHubCommit.Repo.Name, gitHubCommit.BranchName)
+		gitRef = gitHubCommit.BranchName
 	} else if gitHubCommit.GitTag != "" {
-		url = fmt.Sprintf("https://api.github.com/repos/%s/%s/zipball/%s", gitHubCommit.Repo.Owner, gitHubCommit.Repo.Name, gitHubCommit.GitTag)
+		gitRef = gitHubCommit.GitTag
 	} else {
 		return request, fmt.Errorf("Neither a GitCommitSha nor a GitTag nor a BranchName were specified so impossible to identify a specific commit to download.")
 	}
 
+	url := fmt.Sprintf("https://api.github.com/repos/%s/%s/zipball/%s", gitHubCommit.Repo.Owner, gitHubCommit.Repo.Name, gitRef)
+
 	request, err := http.NewRequest("GET", url, nil)
 	if err != nil {
 		return request, wrapError(err)
diff --git a/file_test.go b/file_test.go
index 3ef7e75..8faf9d3 100644
--- a/file_test.go
+++ b/file_test.go
@@ -62,6 +62,7 @@ func TestDownloadGitBranchZipFile(t *testing.T) {
 		githubToken string
 	}{
 		{"gruntwork-io", "fetch-test-public", "sample-branch", ""},
+		{"gruntwork-io", "fetch-test-private", "sample-branch", os.Getenv("GITHUB_OAUTH_TOKEN")},
 	}
 
 	for _, tc := range cases {
@@ -126,6 +127,7 @@ func TestDownloadGitCommitFile(t *testing.T) {
 		{"gruntwork-io", "fetch-test-public", "d2de34edb4c6564e0674b3f390b3b1fb0468183a", ""},
 		{"gruntwork-io", "fetch-test-public", "57752e7f1df0acbd3c1e61545d5c4d0e87699d84", ""},
 		{"gruntwork-io", "fetch-test-public", "f32a08313e30f116a1f5617b8b68c11f1c1dbb61", ""},
+		{"gruntwork-io", "fetch-test-private", "676cfb92b54d33538c756c7a9479bfc3f6b44de2", os.Getenv("GITHUB_OAUTH_TOKEN")},
 	}
 
 	for _, tc := range cases {