add command for force-unlock (#223)

tfexec/force_unlock.go

@@ -0,0 +1,50 @@
+package tfexec
+
+import (
+	"context"
+	"os/exec"
+)
+
+type forceUnlockConfig struct {
+	dir string
+}
+
+var defaultForceUnlockOptions = forceUnlockConfig{}
+
+type ForceUnlockOption interface {
+	configureForceUnlock(*forceUnlockConfig)
+}
+
+func (opt *DirOption) configureForceUnlock(conf *forceUnlockConfig) {
+	conf.dir = opt.path
+}
+
+// ForceUnlock represents the `terraform force-unlock` command
+func (tf *Terraform) ForceUnlock(ctx context.Context, lockID string, opts ...ForceUnlockOption) error {
+	unlockCmd := tf.forceUnlockCmd(ctx, lockID, opts...)
+
+	if err := tf.runTerraformCmd(ctx, unlockCmd); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (tf *Terraform) forceUnlockCmd(ctx context.Context, lockID string, opts ...ForceUnlockOption) *exec.Cmd {
+	c := defaultForceUnlockOptions
+
+	for _, o := range opts {
+		o.configureForceUnlock(&c)
+	}
+	args := []string{"force-unlock", "-force"}
+
+	// positional arguments
+	args = append(args, lockID)
+
+	// optional positional arguments
+	if c.dir != "" {
+		args = append(args, c.dir)
+	}
+
+	return tf.buildTerraformCmd(ctx, nil, args...)
+}

tfexec/internal/e2etest/force_unlock_test.go

@@ -0,0 +1,43 @@
+package e2etest
+
+import (
+	"context"
+	"testing"
+
+	"github.com/hashicorp/go-version"
+
+	"github.com/hashicorp/terraform-exec/tfexec"
+)
+
+// LockID set in the test fixture
+const inmemLockID = "2b6a6738-5dd5-50d6-c0ae-f6352977666b"
+
+var forceUnlockDirArgMaxVersion = version.Must(version.NewVersion("0.15.0"))
+
+func TestForceUnlock(t *testing.T) {
+	runTest(t, "inmem-backend-locked", func(t *testing.T, tfv *version.Version, tf *tfexec.Terraform) {
+		err := tf.Init(context.Background())
+		if err != nil {
+			t.Fatalf("error running Init: %v", err)
+		}
+
+		err = tf.ForceUnlock(context.Background(), inmemLockID)
+		if err != nil {
+			t.Fatalf("error running ForceUnlock: %v", err)
+		}
+	})
+	runTest(t, "inmem-backend-locked", func(t *testing.T, tfv *version.Version, tf *tfexec.Terraform) {
+		if tfv.GreaterThanOrEqual(forceUnlockDirArgMaxVersion) {
+			t.Skip("legacy positional path argument deprecated in favor of global -chdir flag")
+		}
+		err := tf.Init(context.Background())
+		if err != nil {
+			t.Fatalf("error running Init: %v", err)
+		}
+
+		err = tf.ForceUnlock(context.Background(), inmemLockID, tfexec.Dir(tf.WorkingDir()))
+		if err != nil {
+			t.Fatalf("error running ForceUnlock: %v", err)
+		}
+	})
+}