Introduce tfexec.Get() for downloading modules (#176)
diff --git a/tfexec/get.go b/tfexec/get.go
new file mode 100644
index 0000000..5bac9b1
--- /dev/null
+++ b/tfexec/get.go
@@ -0,0 +1,52 @@
+package tfexec
+
+import (
+ "context"
+ "fmt"
+ "os/exec"
+)
+
+type getCmdConfig struct {
+ dir string
+ update bool
+}
+
+// GetCmdOption represents options used in the Get method.
+type GetCmdOption interface {
+ configureGet(*getCmdConfig)
+}
+
+func (opt *DirOption) configureGet(conf *getCmdConfig) {
+ conf.dir = opt.path
+}
+
+func (opt *UpdateOption) configureGet(conf *getCmdConfig) {
+ conf.update = opt.update
+}
+
+// Get represents the terraform get subcommand.
+func (tf *Terraform) Get(ctx context.Context, opts ...GetCmdOption) error {
+ cmd, err := tf.getCmd(ctx, opts...)
+ if err != nil {
+ return err
+ }
+ return tf.runTerraformCmd(ctx, cmd)
+}
+
+func (tf *Terraform) getCmd(ctx context.Context, opts ...GetCmdOption) (*exec.Cmd, error) {
+ c := getCmdConfig{}
+
+ for _, o := range opts {
+ o.configureGet(&c)
+ }
+
+ args := []string{"get", "-no-color"}
+
+ args = append(args, "-update="+fmt.Sprint(c.update))
+
+ if c.dir != "" {
+ args = append(args, c.dir)
+ }
+
+ return tf.buildTerraformCmd(ctx, nil, args...), nil
+}
diff --git a/tfexec/get_test.go b/tfexec/get_test.go
new file mode 100644
index 0000000..5254e96
--- /dev/null
+++ b/tfexec/get_test.go
@@ -0,0 +1,33 @@
+package tfexec
+
+import (
+ "context"
+ "testing"
+
+ "github.com/hashicorp/terraform-exec/tfexec/internal/testutil"
+)
+
+func TestGetCmd(t *testing.T) {
+ td := testTempDir(t)
+
+ tf, err := NewTerraform(td, tfVersion(t, testutil.Latest012))
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ // empty env, to avoid environ mismatch in testing
+ tf.SetEnv(map[string]string{})
+
+ t.Run("basic", func(t *testing.T) {
+ getCmd, err := tf.getCmd(context.Background())
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ assertCmd(t, []string{
+ "get",
+ "-no-color",
+ "-update=false",
+ }, nil, getCmd)
+ })
+}
diff --git a/tfexec/options.go b/tfexec/options.go
index 2f1a3db..d789010 100644
--- a/tfexec/options.go
+++ b/tfexec/options.go
@@ -290,6 +290,14 @@
return &TargetOption{resource}
}
+type UpdateOption struct {
+ update bool
+}
+
+func Update(update bool) *UpdateOption {
+ return &UpdateOption{update}
+}
+
type UpgradeOption struct {
upgrade bool
}
