Adds a configuration layer for use rollup.yml which may be preferred over CLI flags.

internal/config/config.go

@@ -0,0 +1,45 @@
+package config
+
+import (
+	"fmt"
+	"os"
+
+	"gopkg.in/yaml.v2"
+)
+
+type Config struct {
+	FileTypes     []string     `yaml:"file_types"`
+	Ignore        []string     `yaml:"ignore"`
+	CodeGenerated []string     `yaml:"code_generated"`
+	Scrape        ScrapeConfig `yaml:"scrape"`
+}
+
+type ScrapeConfig struct {
+	URL        string `yaml:"url"`
+	CSSLocator string `yaml:"css_locator"`
+}
+
+func Load(configPath string) (*Config, error) {
+	data, err := os.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("error reading config file: %v", err)
+	}
+
+	var config Config
+	err = yaml.Unmarshal(data, &config)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing config file: %v", err)
+	}
+
+	return &config, nil
+}
+
+func DefaultConfigPath() string {
+	return "rollup.yml"
+}
+
+func FileExists(filename string) bool {
+	_, err := os.Stat(filename)
+	return err == nil
+}
+