func buildParser()

in internal/config/config.go [1171:1238]
58 lines of code
23 McCabe index (conditional complexity)

func buildParser(name string, tbl *ast.Table) (parsers.Parser, error) {
	c := &parsers.Config{}

	if node, ok := tbl.Fields["data_format"]; ok {
		if kv, ok := node.(*ast.KeyValue); ok {
			if str, ok := kv.Value.(*ast.String); ok {
				c.DataFormat = str.Value
			}
		}
	}

	// Legacy support, exec plugin originally parsed JSON by default.
	if name == "exec" && c.DataFormat == "" {
		c.DataFormat = "json"
	} else if c.DataFormat == "" {
		c.DataFormat = "influx"
	}

	if node, ok := tbl.Fields["separator"]; ok {
		if kv, ok := node.(*ast.KeyValue); ok {
			if str, ok := kv.Value.(*ast.String); ok {
				c.Separator = str.Value
			}
		}
	}

	if node, ok := tbl.Fields["templates"]; ok {
		if kv, ok := node.(*ast.KeyValue); ok {
			if ary, ok := kv.Value.(*ast.Array); ok {
				for _, elem := range ary.Value {
					if str, ok := elem.(*ast.String); ok {
						c.Templates = append(c.Templates, str.Value)
					}
				}
			}
		}
	}

	if node, ok := tbl.Fields["tag_keys"]; ok {
		if kv, ok := node.(*ast.KeyValue); ok {
			if ary, ok := kv.Value.(*ast.Array); ok {
				for _, elem := range ary.Value {
					if str, ok := elem.(*ast.String); ok {
						c.TagKeys = append(c.TagKeys, str.Value)
					}
				}
			}
		}
	}

	if node, ok := tbl.Fields["data_type"]; ok {
		if kv, ok := node.(*ast.KeyValue); ok {
			if str, ok := kv.Value.(*ast.String); ok {
				c.DataType = str.Value
			}
		}
	}

	c.MetricName = name

	delete(tbl.Fields, "data_format")
	delete(tbl.Fields, "separator")
	delete(tbl.Fields, "templates")
	delete(tbl.Fields, "tag_keys")
	delete(tbl.Fields, "data_type")

	return parsers.NewParser(c)
}