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gcloud.go
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gcloud.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package gcloud
import (
"bytes"
"context"
"encoding/json"
"os"
"os/exec"
"path/filepath"
"time"
"github.com/natefinch/atomic"
"namespacelabs.dev/foundation/internal/artifacts/oci"
"namespacelabs.dev/foundation/internal/compute"
"namespacelabs.dev/foundation/internal/console"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/localexec"
"namespacelabs.dev/foundation/internal/runtime/docker"
"namespacelabs.dev/foundation/internal/runtime/rtypes"
"namespacelabs.dev/foundation/internal/workspace/dirs"
"namespacelabs.dev/foundation/schema"
"namespacelabs.dev/foundation/std/tasks"
"namespacelabs.dev/foundation/std/tasks/idtypes"
)
var UseHostGCloudBinary = false
func Run(ctx context.Context, io rtypes.IO, args ...string) error {
if UseHostGCloudBinary {
cmd := exec.CommandContext(ctx, "gcloud", args...)
cmd.Stdin = io.Stdin
cmd.Stdout = io.Stdout
cmd.Stderr = io.Stderr
return localexec.RunAndPropagateCancelation(ctx, "gcloud", cmd)
}
dir, err := os.UserHomeDir()
if err != nil {
return fnerrors.InternalError("failed to determine home")
}
gcloudDir := filepath.Join(dir, ".config/gcloud")
if err := os.MkdirAll(gcloudDir, 0755); err != nil {
return fnerrors.InternalError("failed to create %q: %w", gcloudDir, err)
}
hostPlatform := docker.HostPlatform()
const imageName = "gcr.io/google.com/cloudsdktool/google-cloud-cli:412.0.0-alpine"
imageRef := oci.ImageP(imageName, &hostPlatform, oci.RegistryAccess{PublicImage: true})
image, err := compute.GetValue(ctx, imageRef)
if err != nil {
return err
}
var opts rtypes.RunToolOpts
opts.Image = image
opts.ImageName = imageName
opts.IO = io
opts.Command = []string{"gcloud"}
opts.Args = args
opts.RunAsUser = true
opts.WorkingDir = "/"
opts.Env = append(opts.Env, &schema.BinaryConfig_EnvEntry{
Name: "CLOUDSDK_CONFIG",
Value: &schema.Resolvable{Value: "/gcloudconfig"},
})
opts.Mounts = append(opts.Mounts, &rtypes.LocalMapping{
HostPath: gcloudDir,
ContainerPath: "/gcloudconfig",
})
return docker.Runtime().Run(ctx, opts)
}
type credential struct {
AccessToken string `json:"access_token"`
IDToken string `json:"id_token"`
TokenExpiry time.Time `json:"token_expiry"`
}
type ConfigHelper struct {
Credential credential `json:"credential"`
}
func Credentials(ctx context.Context) (*credential, error) {
return tasks.Return(ctx, tasks.Action("gcloud.fetch-access-token"), func(ctx context.Context) (*credential, error) {
cacheDir, err := dirs.Ensure(cacheDir())
if err != nil {
return nil, err
}
cacheFile := filepath.Join(cacheDir, "access_token.json")
contents, err := os.ReadFile(cacheFile)
if err == nil {
var cred credential
if json.Unmarshal(contents, &cred) == nil {
if !expired(&cred) {
return &cred, nil
}
}
}
h, err := Helper(ctx)
if err != nil {
return nil, err
}
var b bytes.Buffer
if json.NewEncoder(&b).Encode(h.Credential) == nil {
if err := atomic.WriteFile(cacheFile, bytes.NewReader(b.Bytes())); err != nil {
return nil, err
}
}
return &h.Credential, nil
})
}
func cacheDir() (string, error) {
c, err := dirs.Config()
if err == nil {
return filepath.Join(c, "gcloud-credcache"), nil
}
return c, err
}
func Helper(ctx context.Context) (*ConfigHelper, error) {
return tasks.Return(ctx, tasks.Action("gcloud.slow-fetch-access-token"), func(ctx context.Context) (*ConfigHelper, error) {
var out bytes.Buffer
stderr := console.TypedOutput(ctx, "gcloud", idtypes.CatOutputTool)
if err := Run(ctx, rtypes.IO{Stdout: &out, Stderr: stderr}, "config", "config-helper", "--format=json"); err != nil {
return nil, err
}
var h ConfigHelper
if err := json.Unmarshal(out.Bytes(), &h); err != nil {
return nil, fnerrors.InternalError("failed to decode gcloud output: %w", err)
}
return &h, nil
})
}