add support for downloading packages from bitbucket.org through tag and branch

README.md

@@ -29,7 +29,7 @@ This application still in experiment, any change could happen, but it doesn't af
 
 ## Todo
 
-- Add support for downloading by tag and branch for packages in bitbucket.org, git.oschina.net, gitcafe.com.
+- Add support for downloading by tag and branch for packages in git.oschina.net, gitcafe.com.
 - Add template projects for testing commands.
 - Add gpm working principle design.
 - Add support for downloading tarballs from user sources.

doc/bitbucket.go

@@ -8,6 +8,7 @@ import (
 	"archive/tar"
 	"bytes"
 	"compress/gzip"
+	"errors"
 	"io"
 	"net/http"
 	"os"
@@ -40,8 +41,9 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 	// but does not need to download dependencies.
 	isCheckImport := len(node.Value) == 0
 
-	// Check if download with specific revision.
-	if isCheckImport || len(node.Value) == 1 {
+	switch {
+	case isCheckImport || len(node.Value) == 1:
+		// Get up-to-date version.
 		tags := make(map[string]string)
 		for _, nodeType := range []string{"branches", "tags"} {
 			var nodes map[string]struct {
@@ -61,10 +63,17 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 		if err != nil {
 			return nil, err
 		}
+
 		node.Type = "commit"
 		node.Value = match["commit"]
-	} else {
-		match["commit"] = node.Value
+	case !isCheckImport: // Bundle or snapshot.
+		// Check downlaod type.
+		switch node.Type {
+		case "tag", "commit", "branch":
+			match["commit"] = node.Value
+		default:
+			return nil, errors.New("Unknown node type: " + node.Type)
+		}
 	}
 
 	// We use .tar.gz here.

doc/github.go

@@ -76,6 +76,7 @@ func GetGithubDoc(client *http.Client, match map[string]string, installGOPATH st
 		}
 
 		node.Type = "commit"
+		node.Value = match["sha"]
 	case !isCheckImport: // Bundle or snapshot.
 		// Check downlaod type.
 		switch node.Type {
@@ -96,11 +97,6 @@ func GetGithubDoc(client *http.Client, match map[string]string, installGOPATH st
 		return nil, err
 	}
 
-	r, err := zip.NewReader(bytes.NewReader(p), int64(len(p)))
-	if err != nil {
-		return nil, err
-	}
-
 	shaName := expand("{repo}-{sha}", match)
 	if node.Type == "tag" {
 		shaName = strings.Replace(shaName, "-v", "-", 1)
@@ -115,6 +111,11 @@ func GetGithubDoc(client *http.Client, match map[string]string, installGOPATH st
 	// Create destination directory.
 	os.MkdirAll(installPath+"/", os.ModePerm)
 
+	r, err := zip.NewReader(bytes.NewReader(p), int64(len(p)))
+	if err != nil {
+		return nil, err
+	}
+
 	dirs := make([]string, 0, 5)
 	// Need to add root path because we cannot get from tarball.
 	dirs = append(dirs, installPath+"/")
@@ -154,10 +155,6 @@ func GetGithubDoc(client *http.Client, match map[string]string, installGOPATH st
 		}
 	}
 
-	if node.Type == "commit" {
-		node.Value = match["sha"]
-	}
-
 	var imports []string
 
 	// Check if need to check imports.

install.go

@@ -194,7 +194,7 @@ func downloadPackages(nodes []*doc.Node) {
 				for _, bn := range bnodes {
 					fmt.Printf("[%s] -> %s: %s.\n", bn.ImportPath, bn.Type, bn.Value)
 				}
-				fmt.Printf(fmt.Sprintf("%s", promptMsg["ContinueDownload"]))
+				fmt.Printf(fmt.Sprintf("%s\n", promptMsg["ContinueDownload"]))
 				var option string
 				fmt.Fscan(os.Stdin, &option)
 				if strings.ToLower(option) != "y" {

repo/bundles/test_bundle.json

@@ -44,8 +44,8 @@
 		},
 		{
 			"import_path": "bitbucket.org/zombiezen/gopdf/pdf",
-			"type": "commit",
-			"value": "",
+			"type": "branch",
+			"value": "default",
 			"deps": null
 		},
 		{