86 lines
2.6 KiB
Go
86 lines
2.6 KiB
Go
package filestate
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import (
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"context"
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"encoding/json"
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"os"
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"github.com/pulumi/pulumi/sdk/go/common/diag"
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"github.com/pulumi/pulumi/sdk/go/common/util/cmdutil"
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"golang.org/x/oauth2/google"
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"gocloud.dev/blob/gcsblob"
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"cloud.google.com/go/storage"
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"github.com/pkg/errors"
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"gocloud.dev/blob"
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"gocloud.dev/gcp"
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)
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type GoogleCredentials struct {
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PrivateKeyID string `json:"private_key_id"`
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PrivateKey string `json:"private_key"`
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ClientEmail string `json:"client_email"`
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ClientID string `json:"client_id"`
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}
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func googleCredentials(ctx context.Context) (*google.Credentials, error) {
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// GOOGLE_CREDENTIALS aren't part of the gcloud standard authorization variables
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// but the GCP terraform provider uses this variable to allow users to authenticate
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// with the contents of a credentials.json file instead of just a file path.
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// https://www.terraform.io/docs/backends/types/gcs.html
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if creds := os.Getenv("GOOGLE_CREDENTIALS"); creds != "" {
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// We try $GOOGLE_CREDENTIALS before gcp.DefaultCredentials
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// so that users can override the default creds
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credentials, err := google.CredentialsFromJSON(ctx, []byte(creds), storage.ScopeReadWrite)
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if err != nil {
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return nil, errors.Wrap(err, "unable to parse credentials from $GOOGLE_CREDENTIALS")
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}
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return credentials, nil
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}
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// DefaultCredentials will attempt to load creds in the following order:
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// 1. a file located at $GOOGLE_APPLICATION_CREDENTIALS
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// 2. application_default_credentials.json file in ~/.config/gcloud or $APPDATA\gcloud
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credentials, err := gcp.DefaultCredentials(ctx)
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if err != nil {
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return nil, errors.Wrap(err, "unable to find gcp credentials")
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}
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return credentials, nil
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}
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func GoogleCredentialsMux(ctx context.Context) (*blob.URLMux, error) {
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credentials, err := googleCredentials(ctx)
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if err != nil {
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return nil, errors.New("missing google credentials")
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}
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client, err := gcp.NewHTTPClient(gcp.DefaultTransport(), credentials.TokenSource)
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if err != nil {
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return nil, err
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}
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options := gcsblob.Options{}
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account := GoogleCredentials{}
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err = json.Unmarshal(credentials.JSON, &account)
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if err == nil && account.ClientEmail != "" && account.PrivateKey != "" {
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options.GoogleAccessID = account.ClientEmail
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options.PrivateKey = []byte(account.PrivateKey)
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} else {
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cmdutil.Diag().Warningf(diag.Message("",
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"Pulumi will not be able to print a statefile permalink using these credentials. "+
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"Neither a GoogleAccessID or PrivateKey are available. "+
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"Try using a GCP Service Account."))
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}
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blobmux := &blob.URLMux{}
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blobmux.RegisterBucket(gcsblob.Scheme, &gcsblob.URLOpener{
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Client: client,
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Options: options,
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})
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return blobmux, nil
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}
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