chore: improved erorr reporting

Author: denis256

pkg/config/config.go

@@ -1388,7 +1388,10 @@ func ParseConfig(
 	}
 
 	if terragruntConfigFile == nil {
-		return nil, errors.New(CouldNotResolveTerragruntConfigInFileError(file.ConfigPath))
+		// Surface the eval / decode errors accumulated above alongside the wrapper
+		// so callers see the actual cause and not just "Could not find ...".
+		errs = errs.Append(errors.New(CouldNotResolveTerragruntConfigInFileError(file.ConfigPath)))
+		return nil, errs.ErrorOrNil()
 	}
 
 	config, err := convertToTerragruntConfig(ctx, pctx, file.ConfigPath, terragruntConfigFile)

pkg/config/config_helpers.go

@@ -1032,6 +1032,16 @@ func ParseTerragruntConfig(ctx context.Context, pctx *ParsingContext, l log.Logg
 	// Track that this file was read during parsing
 	trackFileRead(pctx.FilesRead, path)
 
+	l.Debugf("read_terragrunt_config target=%s caller=%s original=%s workingDir=%s skipOutput=%t skipOutputsResolution=%t decodedDeps=%t",
+		targetConfig,
+		pctx.TerragruntConfigPath,
+		pctx.OriginalTerragruntConfigPath,
+		pctx.WorkingDir,
+		pctx.SkipOutput,
+		pctx.SkipOutputsResolution,
+		pctx.DecodedDependencies != nil,
+	)
+
 	// We update the ctx of terragruntOptions to the config being read in.
 	l, pctx, err := pctx.WithConfigPath(l, targetConfig)
 	if err != nil {