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refresh.go
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refresh.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package tfexec
import (
"context"
"fmt"
"io"
"os/exec"
"strconv"
)
type refreshConfig struct {
backup string
dir string
lock bool
lockTimeout string
reattachInfo ReattachInfo
state string
stateOut string
targets []string
vars []string
varFiles []string
}
var defaultRefreshOptions = refreshConfig{
lock: true,
lockTimeout: "0s",
}
// RefreshCmdOption represents options used in the Refresh method.
type RefreshCmdOption interface {
configureRefresh(*refreshConfig)
}
func (opt *BackupOption) configureRefresh(conf *refreshConfig) {
conf.backup = opt.path
}
func (opt *DirOption) configureRefresh(conf *refreshConfig) {
conf.dir = opt.path
}
func (opt *LockOption) configureRefresh(conf *refreshConfig) {
conf.lock = opt.lock
}
func (opt *LockTimeoutOption) configureRefresh(conf *refreshConfig) {
conf.lockTimeout = opt.timeout
}
func (opt *ReattachOption) configureRefresh(conf *refreshConfig) {
conf.reattachInfo = opt.info
}
func (opt *StateOption) configureRefresh(conf *refreshConfig) {
conf.state = opt.path
}
func (opt *StateOutOption) configureRefresh(conf *refreshConfig) {
conf.stateOut = opt.path
}
func (opt *TargetOption) configureRefresh(conf *refreshConfig) {
conf.targets = append(conf.targets, opt.target)
}
func (opt *VarOption) configureRefresh(conf *refreshConfig) {
conf.vars = append(conf.vars, opt.assignment)
}
func (opt *VarFileOption) configureRefresh(conf *refreshConfig) {
conf.varFiles = append(conf.varFiles, opt.path)
}
// Refresh represents the terraform refresh subcommand.
func (tf *Terraform) Refresh(ctx context.Context, opts ...RefreshCmdOption) error {
cmd, err := tf.refreshCmd(ctx, opts...)
if err != nil {
return err
}
return tf.runTerraformCmd(ctx, cmd)
}
// RefreshJSON represents the terraform refresh subcommand with the `-json` flag.
// Using the `-json` flag will result in
// [machine-readable](https://developer.hashicorp.com/terraform/internals/machine-readable-ui)
// JSON being written to the supplied `io.Writer`. RefreshJSON is likely to be
// removed in a future major version in favour of Refresh returning JSON by default.
func (tf *Terraform) RefreshJSON(ctx context.Context, w io.Writer, opts ...RefreshCmdOption) error {
err := tf.compatible(ctx, tf0_15_3, nil)
if err != nil {
return fmt.Errorf("terraform refresh -json was added in 0.15.3: %w", err)
}
tf.SetStdout(w)
cmd, err := tf.refreshJSONCmd(ctx, opts...)
if err != nil {
return err
}
return tf.runTerraformCmd(ctx, cmd)
}
func (tf *Terraform) refreshCmd(ctx context.Context, opts ...RefreshCmdOption) (*exec.Cmd, error) {
c := defaultRefreshOptions
for _, o := range opts {
o.configureRefresh(&c)
}
args := tf.buildRefreshArgs(c)
return tf.buildRefreshCmd(ctx, c, args)
}
func (tf *Terraform) refreshJSONCmd(ctx context.Context, opts ...RefreshCmdOption) (*exec.Cmd, error) {
c := defaultRefreshOptions
for _, o := range opts {
o.configureRefresh(&c)
}
args := tf.buildRefreshArgs(c)
args = append(args, "-json")
return tf.buildRefreshCmd(ctx, c, args)
}
func (tf *Terraform) buildRefreshArgs(c refreshConfig) []string {
args := []string{"refresh", "-no-color", "-input=false"}
// string opts: only pass if set
if c.backup != "" {
args = append(args, "-backup="+c.backup)
}
if c.lockTimeout != "" {
args = append(args, "-lock-timeout="+c.lockTimeout)
}
if c.state != "" {
args = append(args, "-state="+c.state)
}
if c.stateOut != "" {
args = append(args, "-state-out="+c.stateOut)
}
for _, vf := range c.varFiles {
args = append(args, "-var-file="+vf)
}
// boolean and numerical opts: always pass
args = append(args, "-lock="+strconv.FormatBool(c.lock))
// string slice opts: split into separate args
if c.targets != nil {
for _, ta := range c.targets {
args = append(args, "-target="+ta)
}
}
if c.vars != nil {
for _, v := range c.vars {
args = append(args, "-var", v)
}
}
return args
}
func (tf *Terraform) buildRefreshCmd(ctx context.Context, c refreshConfig, args []string) (*exec.Cmd, error) {
// optional positional argument
if c.dir != "" {
args = append(args, c.dir)
}
mergeEnv := map[string]string{}
if c.reattachInfo != nil {
reattachStr, err := c.reattachInfo.marshalString()
if err != nil {
return nil, err
}
mergeEnv[reattachEnvVar] = reattachStr
}
return tf.buildTerraformCmd(ctx, mergeEnv, args...), nil
}