/
helpers.go
67 lines (58 loc) · 1.61 KB
/
helpers.go
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package main
import (
"flag"
"fmt"
"io/ioutil"
"golang.org/x/net/context"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/cloud"
)
func getFlags() (bool, bool) {
var useAppDefault bool
var verbose bool
flag.BoolVar(
&useAppDefault, "use-app-default", false,
"Boolean to determine if app. default credentials should be used")
flag.BoolVar(
&verbose, "verbose", false,
"Boolean to determine if verbosity level should be increased")
flag.Parse()
return useAppDefault, verbose
}
func getAppDefaultClientArgs() (*context.Context, *cloud.ClientOption, error) {
ctx := oauth2.NoContext
tokenSrc, err := google.DefaultTokenSource(ctx, ScopeCloudPlatform)
if err != nil {
return nil, nil, err
}
clientOption := cloud.WithTokenSource(tokenSrc)
return &ctx, &clientOption, nil
}
func getServiceAccountClientArgs(jwtScope string) (*context.Context, *cloud.ClientOption, error) {
jsonKey, err := ioutil.ReadFile(KeyFile)
if err != nil {
return nil, nil, err
}
config, err := google.JWTConfigFromJSON(jsonKey, jwtScope)
if err != nil {
return nil, nil, err
}
ctx := cloud.NewContext(ProjectID, config.Client(oauth2.NoContext))
clientOption := cloud.WithTokenSource(config.TokenSource(ctx))
return &ctx, &clientOption, nil
}
func getClientArgs(jwtScope string) (*context.Context, *cloud.ClientOption, error) {
useAppDefault, verbose := getFlags()
if useAppDefault {
if verbose {
fmt.Println("Using App. Default Credentials.")
}
return getAppDefaultClientArgs()
} else {
if verbose {
fmt.Println("Using Service Account.")
}
return getServiceAccountClientArgs(jwtScope)
}
}