DEVPL-461: add 'text file busy' as a retryable error (#19)

* style: run 'gofumpt -w .' and configure VSCode to maintain
* fix: set up retryable errors, including 'text file busy' case

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+  "gopls": {
+    "formatting.gofumpt": true
+  }
+}

providers.go

@@ -166,7 +166,7 @@ func DownloadProviderVersionE(version string, sourceAddress string, providerName
 	// Create ~/.terraform.d/plugin-cache directory if it doesn't exist
 	// https://gist.github.com/ivanzoid/5040166bb3f0c82575b52c2ca5f5a60c
 	if _, err := os.Stat(binaryPath); os.IsNotExist(err) {
-		os.MkdirAll(binaryPath, os.ModeDir|0755)
+		os.MkdirAll(binaryPath, os.ModeDir|0o755)
 	}
 	var binaryUrl string
 	binaryUrl, err = GetBinaryUrl(version, providerName)
@@ -212,7 +212,7 @@ func DownloadProviderVersionE(version string, sourceAddress string, providerName
 	}()
 	defer os.Remove(out.Name())
 	zipExtractPath := binaryDownloadDirectory + "/bin_" + version
-	os.MkdirAll(zipExtractPath, 0755)
+	os.MkdirAll(zipExtractPath, 0o755)
 
 	// Cleanup zip files
 	defer os.RemoveAll(zipExtractPath)

terraform.go

@@ -151,7 +151,7 @@ func UpdateModuleSourceAndVersionE(srcDir, module, src, ver string) error {
 		}
 
 		if hasChanges {
-			if err := os.WriteFile(filename, f.Bytes(), 0666); err != nil {
+			if err := os.WriteFile(filename, f.Bytes(), 0o666); err != nil {
 				return err
 			}
 		}
@@ -291,7 +291,7 @@ func UpdateProviderVersionE(dir, provider, version string, providerSource string
 		}
 
 		if hasChanges {
-			if err := ioutil.WriteFile(filename, f.Bytes(), 0666); err != nil {
+			if err := ioutil.WriteFile(filename, f.Bytes(), 0o666); err != nil {
 				return err
 			}
 
@@ -323,7 +323,6 @@ func UpdateProviderVersion(t *testing.T, dir, provider, version string, provider
 // Usage:
 // * version is the version of Terraform to download.
 func GetTerraformBinaryUrlE(version string) (string, error) {
-
 	var binaryUrl string
 	operatingSystem := runtime.GOOS
 	architecture := runtime.GOARCH
@@ -362,7 +361,6 @@ func GetTerraformBinaryUrlE(version string) (string, error) {
 	} else {
 		return "", errors.New("Unable to find an appropriate Terraform binary download URL for the underlying OS and architecture")
 	}
-
 }
 
 // Closure to address file descriptors issue with all the deferred .Close() methods
@@ -412,7 +410,6 @@ func extractAndWriteFile(dst string, f *zip.File) error {
 // Usage:
 // * version is the version of Terraform to download.
 func DownloadTerraformVersionE(version string) (binaryPath string, err error) {
-
 	// Initialise all path variables
 	homeDirectory, _ := os.UserHomeDir()
 	binaryDownloadDirectory := filepath.Join(homeDirectory, ".terraform.versions")
@@ -424,7 +421,7 @@ func DownloadTerraformVersionE(version string) (binaryPath string, err error) {
 		// Create ~/.terraform.versions directory if it doesn't exist
 		// https://gist.github.com/ivanzoid/5040166bb3f0c82575b52c2ca5f5a60c
 		if _, err := os.Stat(binaryDownloadDirectory); os.IsNotExist(err) {
-			os.Mkdir(binaryDownloadDirectory, os.ModeDir|0755)
+			os.Mkdir(binaryDownloadDirectory, os.ModeDir|0o755)
 		}
 
 		var binaryUrl string
@@ -473,7 +470,7 @@ func DownloadTerraformVersionE(version string) (binaryPath string, err error) {
 		defer os.Remove(out.Name())
 
 		zipExtractPath := binaryDownloadDirectory + "/bin_" + version
-		os.MkdirAll(zipExtractPath, 0755)
+		os.MkdirAll(zipExtractPath, 0o755)
 
 		// Cleanup zip files
 		defer os.RemoveAll(zipExtractPath)

terraform_modules.go

@@ -48,14 +48,13 @@ func UpdateModuleSourcesToLocalPaths(t *testing.T, dst string) {
 		}
 
 		if hasChanges {
-			if err := os.WriteFile(filename, f.Bytes(), 0666); err != nil {
+			if err := os.WriteFile(filename, f.Bytes(), 0o666); err != nil {
 				return err
 			}
 		}
 
 		return nil
 	})
-
 	if err != nil {
 		t.Fatalf("An error occurred when attempting to resolve all module sources to local paths: %s", err.Error())
 	}

terraform_versions.go

@@ -7,6 +7,7 @@ import (
 	"regexp"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/gruntwork-io/terratest/modules/terraform"
 	teststructure "github.com/gruntwork-io/terratest/modules/test-structure"
@@ -78,13 +79,30 @@ func GetTerraformVersionConstraint(t *testing.T, srcDir string) string {
 	return constraint
 }
 
+func newTerraformOptions(t *testing.T) *terraform.Options {
+	t.Helper()
+
+	// Start with default retryable errors as a baseline.
+	opts := terraform.WithDefaultRetryableErrors(t, &terraform.Options{})
+
+	// Add a pattern to cover off this corner case.
+	opts.RetryableTerraformErrors[".*text file busy.*"] = "os: StartProcess ETXTBSY race on Unix systems - " +
+		"https://github.com/golang/go/issues/22315"
+
+	// Set some additional options to govern the retry behaviour.
+	opts.MaxRetries = 3
+	opts.TimeBetweenRetries = time.Second * 5
+
+	return opts
+}
+
 func TerraformVersionsTest(t *testing.T, srcDir string, variables map[string]interface{}, environment_variables map[string]string) {
 	constraint := GetTerraformVersionConstraint(t, srcDir)
 	available := GetAvailableVersions(t, "terraform")
 	versions := GetMatchingVersions(t, constraint, available)
 
 	for _, version := range versions {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables
@@ -112,7 +130,7 @@ func AwsProviderVersionsTest(t *testing.T, srcDir string, variables map[string]i
 	versions := GetMatchingVersions(t, constraint, available)
 
 	for _, version := range versions {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables
@@ -140,7 +158,7 @@ func CloudflareProviderVersionsTest(t *testing.T, srcDir string, variables map[s
 	testVers := GetMatchingVersions(t, constraint, available)
 
 	for _, version := range testVers {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables
@@ -167,7 +185,7 @@ func DatadogProviderVersionsTest(t *testing.T, srcDir string, variables map[stri
 	testVers := GetMatchingVersions(t, constraint, available)
 
 	for _, version := range testVers {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables
@@ -193,7 +211,7 @@ func OpsgenieProviderVersionsTest(t *testing.T, srcDir string, variables map[str
 	testVers := []string{"0.6.10", "0.6.11", "0.6.14", "0.6.15", "0.6.16", "0.6.17", "0.6.18", "0.6.19", "0.6.20"} // testing for specific versions as https://api.releases.hashicorp.com/v1/releases/terraform-provider-opsgenie is not showing anything newer than 0.6.11 currently
 
 	for _, version := range testVers {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables
@@ -220,7 +238,7 @@ func GcpProviderVersionsTest(t *testing.T, srcDir string, variables map[string]i
 	testVers := GetMatchingVersions(t, constraint, available)
 
 	for _, version := range testVers {
-		var tfOptions = &terraform.Options{}
+		tfOptions := newTerraformOptions(t)
 
 		if len(variables) > 0 {
 			tfOptions.Vars = variables