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apply.go
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apply.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 applyConfig struct {
allowDeferral bool
backup string
destroy bool
dirOrPlan string
lock bool
// LockTimeout must be a string with time unit, e.g. '10s'
lockTimeout string
parallelism int
reattachInfo ReattachInfo
refresh bool
refreshOnly bool
replaceAddrs []string
state string
stateOut string
targets []string
// Vars: each var must be supplied as a single string, e.g. 'foo=bar'
vars []string
varFiles []string
}
var defaultApplyOptions = applyConfig{
destroy: false,
lock: true,
parallelism: 10,
refresh: true,
}
// ApplyOption represents options used in the Apply method.
type ApplyOption interface {
configureApply(*applyConfig)
}
func (opt *ParallelismOption) configureApply(conf *applyConfig) {
conf.parallelism = opt.parallelism
}
func (opt *BackupOption) configureApply(conf *applyConfig) {
conf.backup = opt.path
}
func (opt *TargetOption) configureApply(conf *applyConfig) {
conf.targets = append(conf.targets, opt.target)
}
func (opt *LockTimeoutOption) configureApply(conf *applyConfig) {
conf.lockTimeout = opt.timeout
}
func (opt *StateOption) configureApply(conf *applyConfig) {
conf.state = opt.path
}
func (opt *StateOutOption) configureApply(conf *applyConfig) {
conf.stateOut = opt.path
}
func (opt *VarFileOption) configureApply(conf *applyConfig) {
conf.varFiles = append(conf.varFiles, opt.path)
}
func (opt *LockOption) configureApply(conf *applyConfig) {
conf.lock = opt.lock
}
func (opt *RefreshOption) configureApply(conf *applyConfig) {
conf.refresh = opt.refresh
}
func (opt *RefreshOnlyOption) configureApply(conf *applyConfig) {
conf.refreshOnly = opt.refreshOnly
}
func (opt *ReplaceOption) configureApply(conf *applyConfig) {
conf.replaceAddrs = append(conf.replaceAddrs, opt.address)
}
func (opt *VarOption) configureApply(conf *applyConfig) {
conf.vars = append(conf.vars, opt.assignment)
}
func (opt *DirOrPlanOption) configureApply(conf *applyConfig) {
conf.dirOrPlan = opt.path
}
func (opt *ReattachOption) configureApply(conf *applyConfig) {
conf.reattachInfo = opt.info
}
func (opt *DestroyFlagOption) configureApply(conf *applyConfig) {
conf.destroy = opt.destroy
}
func (opt *AllowDeferralOption) configureApply(conf *applyConfig) {
conf.allowDeferral = opt.allowDeferral
}
// Apply represents the terraform apply subcommand.
func (tf *Terraform) Apply(ctx context.Context, opts ...ApplyOption) error {
cmd, err := tf.applyCmd(ctx, opts...)
if err != nil {
return err
}
return tf.runTerraformCmd(ctx, cmd)
}
// ApplyJSON represents the terraform apply 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`. ApplyJSON is likely to be
// removed in a future major version in favour of Apply returning JSON by default.
func (tf *Terraform) ApplyJSON(ctx context.Context, w io.Writer, opts ...ApplyOption) error {
err := tf.compatible(ctx, tf0_15_3, nil)
if err != nil {
return fmt.Errorf("terraform apply -json was added in 0.15.3: %w", err)
}
tf.SetStdout(w)
cmd, err := tf.applyJSONCmd(ctx, opts...)
if err != nil {
return err
}
return tf.runTerraformCmd(ctx, cmd)
}
func (tf *Terraform) applyCmd(ctx context.Context, opts ...ApplyOption) (*exec.Cmd, error) {
c := defaultApplyOptions
for _, o := range opts {
o.configureApply(&c)
}
args, err := tf.buildApplyArgs(ctx, c)
if err != nil {
return nil, err
}
return tf.buildApplyCmd(ctx, c, args)
}
func (tf *Terraform) applyJSONCmd(ctx context.Context, opts ...ApplyOption) (*exec.Cmd, error) {
c := defaultApplyOptions
for _, o := range opts {
o.configureApply(&c)
}
args, err := tf.buildApplyArgs(ctx, c)
if err != nil {
return nil, err
}
args = append(args, "-json")
return tf.buildApplyCmd(ctx, c, args)
}
func (tf *Terraform) buildApplyArgs(ctx context.Context, c applyConfig) ([]string, error) {
args := []string{"apply", "-no-color", "-auto-approve", "-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))
args = append(args, "-parallelism="+fmt.Sprint(c.parallelism))
args = append(args, "-refresh="+strconv.FormatBool(c.refresh))
if c.refreshOnly {
err := tf.compatible(ctx, tf0_15_4, nil)
if err != nil {
return nil, fmt.Errorf("refresh-only option was introduced in Terraform 0.15.4: %w", err)
}
if !c.refresh {
return nil, fmt.Errorf("you cannot use refresh=false in refresh-only planning mode")
}
args = append(args, "-refresh-only")
}
// string slice opts: split into separate args
if c.replaceAddrs != nil {
err := tf.compatible(ctx, tf0_15_2, nil)
if err != nil {
return nil, fmt.Errorf("replace option was introduced in Terraform 0.15.2: %w", err)
}
for _, addr := range c.replaceAddrs {
args = append(args, "-replace="+addr)
}
}
if c.destroy {
err := tf.compatible(ctx, tf0_15_2, nil)
if err != nil {
return nil, fmt.Errorf("-destroy option was introduced in Terraform 0.15.2: %w", err)
}
args = append(args, "-destroy")
}
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)
}
}
if c.allowDeferral {
// Ensure the version is later than 1.9.0
err := tf.compatible(ctx, tf1_9_0, nil)
if err != nil {
return nil, fmt.Errorf("-allow-deferral is an experimental option introduced in Terraform 1.9.0: %w", err)
}
// Ensure the version has experiments enabled (alpha or dev builds)
err = tf.experimentsEnabled(ctx)
if err != nil {
return nil, fmt.Errorf("-allow-deferral is only available in experimental Terraform builds: %w", err)
}
args = append(args, "-allow-deferral")
}
return args, nil
}
func (tf *Terraform) buildApplyCmd(ctx context.Context, c applyConfig, args []string) (*exec.Cmd, error) {
// string argument: pass if set
if c.dirOrPlan != "" {
args = append(args, c.dirOrPlan)
}
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
}