Initial Commit

internal/index/index.go

@@ -0,0 +1,60 @@
+/*
+ * distrohop - A utility for correlating and identifying equivalent software
+ * packages across different Linux distributions
+ *
+ * Copyright (C) 2025 Elara Ivy <elara@elara.ws>
+ *
+ * This file is part of distrohop.
+ *
+ * distrohop is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * distrohop is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with distrohop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package index
+
+import (
+	"fmt"
+	"io"
+)
+
+// Record represents a data record for a single package
+type Record struct {
+	Name  string
+	Tags  []string
+	Error error
+}
+
+type Importer interface {
+	// Name returns the name of the importer
+	Name() string
+	// IndexURL generates a list of possible index URLs to try
+	IndexURL(baseURL, version, repo, arch string) ([]string, error)
+	// ReadPkgData reads data from an index file and sends it on out
+	ReadPkgData(r io.Reader, out chan Record)
+}
+
+var importers = []Importer{
+	APT{},
+	DNF{},
+	Pacman{},
+}
+
+// GetImporter gets an importer by its name
+func GetImporter(name string) (Importer, error) {
+	for _, importer := range importers {
+		if importer.Name() == name {
+			return importer, nil
+		}
+	}
+	return nil, fmt.Errorf("no such importer: %q", name)
+}