Initial commit

internal/config/config.go

@@ -0,0 +1,79 @@
+/*
+ * LURE - Linux User REpository
+ * Copyright (C) 2023 Elara Musayelyan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package config
+
+import (
+	"context"
+	"os"
+	"sync"
+
+	"github.com/pelletier/go-toml/v2"
+	"lure.sh/lure/internal/types"
+	"lure.sh/lure/pkg/loggerctx"
+)
+
+var defaultConfig = &types.Config{
+	RootCmd:          "sudo",
+	PagerStyle:       "native",
+	IgnorePkgUpdates: []string{},
+	Repos: []types.Repo{
+		{
+			Name: "default",
+			URL:  "https://github.com/lure-sh/lure-repo.git",
+		},
+	},
+}
+
+var (
+	configMtx sync.Mutex
+	config    *types.Config
+)
+
+// Config returns a LURE configuration struct.
+// The first time it's called, it'll load the config from a file.
+// Subsequent calls will just return the same value.
+func Config(ctx context.Context) *types.Config {
+	configMtx.Lock()
+	defer configMtx.Unlock()
+	log := loggerctx.From(ctx)
+
+	if config == nil {
+		cfgFl, err := os.Open(GetPaths(ctx).ConfigPath)
+		if err != nil {
+			log.Warn("Error opening config file, using defaults").Err(err).Send()
+			return defaultConfig
+		}
+		defer cfgFl.Close()
+
+		// Copy the default configuration into config
+		defCopy := *defaultConfig
+		config = &defCopy
+		config.Repos = nil
+
+		err = toml.NewDecoder(cfgFl).Decode(config)
+		if err != nil {
+			log.Warn("Error decoding config file, using defaults").Err(err).Send()
+			// Set config back to nil so that we try again next time
+			config = nil
+			return defaultConfig
+		}
+	}
+
+	return config
+}