feat: Add config parsing

1 files changed, 84 insertions, 0 deletions

diff --git a/pkg/config/config.go b/pkg/config/config.go
new file mode 100644
index 0000000..ba1614f
--- /dev/null
+++ b/pkg/config/config.go
@@ -0,0 +1,84 @@
+package config
+
+import (
+	"fmt"
+	"io"
+	"strconv"
+
+	"git.sr.ht/~emersion/go-scfg"
+)
+
+type (
+	Scan struct {
+		Path   string
+		Public bool
+	}
+
+	Configuration struct {
+		Scan *Scan
+	}
+)
+
+func Parse(r io.Reader) (*Configuration, error) {
+	block, err := scfg.Read(r)
+	if err != nil {
+		return nil, err
+	}
+
+	config := defaultConfiguration()
+
+	err = setScan(block, config.Scan)
+	if err != nil {
+		return nil, err
+	}
+
+	return config, nil
+}
+
+func defaultConfiguration() *Configuration {
+	return &Configuration{
+		Scan: &Scan{
+			Public: true,
+			Path:   "",
+		},
+	}
+}
+
+func setScan(block scfg.Block, scan *Scan) error {
+	scanDir := block.Get("scan")
+	err := setString(scanDir, &scan.Path)
+	if err != nil {
+		return err
+	}
+
+	public := scanDir.Children.Get("public")
+	return setBool(public, &scan.Public)
+}
+
+func setBool(dir *scfg.Directive, field *bool) error {
+
+	if dir != nil {
+		p1 := first(dir.Params)
+		v, err := strconv.ParseBool(p1)
+		if err != nil {
+			return fmt.Errorf("Error parsing bool param of %s: %w", dir.Name, err)
+		}
+		*field = v
+	}
+	return nil
+}
+
+func setString(dir *scfg.Directive, field *string) error {
+	if dir != nil {
+		*field = first(dir.Params)
+	}
+	return nil
+}
+
+func first[T any](v []T) T {
+	if len(v) == 0 {
+		var zero T
+		return zero
+	}
+	return v[0]
+}