vendor: update buildkit to master@31c870e82a48

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/aws/aws-sdk-go-v2/internal/shareddefaults/shared_config.go

@@ -0,0 +1,47 @@
+package shareddefaults
+
+import (
+	"os"
+	"os/user"
+	"path/filepath"
+)
+
+// SharedCredentialsFilename returns the SDK's default file path
+// for the shared credentials file.
+//
+// Builds the shared config file path based on the OS's platform.
+//
+//   - Linux/Unix: $HOME/.aws/credentials
+//   - Windows: %USERPROFILE%\.aws\credentials
+func SharedCredentialsFilename() string {
+	return filepath.Join(UserHomeDir(), ".aws", "credentials")
+}
+
+// SharedConfigFilename returns the SDK's default file path for
+// the shared config file.
+//
+// Builds the shared config file path based on the OS's platform.
+//
+//   - Linux/Unix: $HOME/.aws/config
+//   - Windows: %USERPROFILE%\.aws\config
+func SharedConfigFilename() string {
+	return filepath.Join(UserHomeDir(), ".aws", "config")
+}
+
+// UserHomeDir returns the home directory for the user the process is
+// running under.
+func UserHomeDir() string {
+	// Ignore errors since we only care about Windows and *nix.
+	home, _ := os.UserHomeDir()
+
+	if len(home) > 0 {
+		return home
+	}
+
+	currUser, _ := user.Current()
+	if currUser != nil {
+		home = currUser.HomeDir
+	}
+
+	return home
+}