Workaround OAuth woes by allowing user specified Oauth credentials.

gdrive.go

@@ -45,6 +45,11 @@ func main() {
 			Patterns:    []string{"--service-account"},
 			Description: "Oauth service account filename, used for server to server communication without user interaction (filename path is relative to config dir)",
 		},
+		cli.StringFlag{
+			Name:        "oauthCredentials",
+			Patterns:    []string{"--oauth-credentials"},
+			Description: "Oauth Credentials file as downloaded from https://console.cloud.google.com/apis/credentials",
+		},
 	}
 
 	handlers := []*cli.Handler{

go.mod

@@ -0,0 +1,11 @@
+module github.com/prasmussen/gdrive
+
+go 1.13
+
+require (
+	github.com/sabhiram/go-git-ignore v0.0.0-20180611051255-d3107576ba94
+	github.com/soniakeys/graph v0.0.0
+	golang.org/x/net v0.0.0-20191118183410-d06c31c94cae
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
+	google.golang.org/api v0.14.0
+)

go.sum

@@ -0,0 +1,99 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
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handlers_drive.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -17,6 +18,7 @@ import (
 const ClientId = "367116221053-7n0vf5akeru7on6o2fjinrecpdoe99eg.apps.googleusercontent.com"
 const ClientSecret = "1qsNodXNaWq1mQuBjUjmvhoO"
 const TokenFilename = "token_v2.json"
+const OauthCredentialsFilename = "oauthClient.json"
 const DefaultCacheFileName = "file_cache.json"
 
 func listHandler(ctx cli.Context) {
@@ -340,21 +342,53 @@ func aboutExportHandler(ctx cli.Context) {
 	checkErr(err)
 }
 
+func getOauthAppCredentials(credsPath string) (clientId, clientSecret string, err error) {
+	clientId = ClientId
+	clientSecret = ClientSecret
+	if _, err := os.Stat(credsPath); os.IsNotExist(err) {
+		return "", "", err
+	}
+	var oauthCredentials struct {
+		Installed struct {
+			ClientId     string `json:"client_id"`
+			ClientSecret string `json:"client_secret"`
+		} `json:"installed"`
+	}
+	content, err := ioutil.ReadFile(credsPath)
+	if err != nil {
+		return "", "", err
+	}
+	json.Unmarshal(content, &oauthCredentials)
+	clientId = oauthCredentials.Installed.ClientId
+	clientSecret = oauthCredentials.Installed.ClientSecret
+
+	return clientId, clientSecret, nil
+}
+
 func getOauthClient(args cli.Arguments) (*http.Client, error) {
+	configDir := getConfigDir(args)
+
+	credsPath := ConfigFilePath(configDir, OauthCredentialsFilename)
+	if args.String("oauthCredentials") != "" {
+		credsPath = args.String("oauthCrendentials")
+	}
+	clientId, clientSecret, err := getOauthAppCredentials(credsPath)
+	if err != nil {
+		ExitF("Failed to load oauth app credentials:")
+	}
+
 	if args.String("refreshToken") != "" && args.String("accessToken") != "" {
 		ExitF("Access token not needed when refresh token is provided")
 	}
 
 	if args.String("refreshToken") != "" {
-		return auth.NewRefreshTokenClient(ClientId, ClientSecret, args.String("refreshToken")), nil
+		return auth.NewRefreshTokenClient(clientId, clientSecret, args.String("refreshToken")), nil
 	}
 
 	if args.String("accessToken") != "" {
-		return auth.NewAccessTokenClient(ClientId, ClientSecret, args.String("accessToken")), nil
+		return auth.NewAccessTokenClient(clientId, clientSecret, args.String("accessToken")), nil
 	}
 
-	configDir := getConfigDir(args)
-
 	if args.String("serviceAccount") != "" {
 		serviceAccountPath := ConfigFilePath(configDir, args.String("serviceAccount"))
 		serviceAccountClient, err := auth.NewServiceAccountClient(serviceAccountPath)
@@ -365,7 +399,7 @@ func getOauthClient(args cli.Arguments) (*http.Client, error) {
 	}
 
 	tokenPath := ConfigFilePath(configDir, TokenFilename)
-	return auth.NewFileSourceClient(ClientId, ClientSecret, tokenPath, authCodePrompt)
+	return auth.NewFileSourceClient(clientId, clientSecret, tokenPath, authCodePrompt)
 }
 
 func getConfigDir(args cli.Arguments) string {