X-Git-Url: https://ruderich.org/simon/gitweb/?p=nsscash%2Fnsscash.git;a=blobdiff_plain;f=config.go;fp=config.go;h=8e9a6308124a4d74adb7f8e2dde1ad82f16b84bf;hp=0000000000000000000000000000000000000000;hb=92afde4e875a96e1ab865e29b9f0d11b08d7db1c;hpb=748846b9a65726fd19d43b45a4db68ef4c2e77f4

diff --git a/config.go b/config.go
new file mode 100644
index 0000000..8e9a630
--- /dev/null
+++ b/config.go
@@ -0,0 +1,87 @@
+// Configuration file parsing and validation
+
+// Copyright (C) 2019  Simon Ruderich
+//
+// This program 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.
+//
+// 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/BurntSushi/toml"
+)
+
+type Config struct {
+	StatePath string
+	Files     []File `toml:"file"`
+}
+
+type File struct {
+	Type FileType
+	Url  string
+	Path string
+
+	body []byte // internally used by handleFiles()
+}
+
+//go:generate stringer -type=FileType
+type FileType int
+
+const (
+	FileTypePlain FileType = iota
+	FileTypePasswd
+)
+
+func (t *FileType) UnmarshalText(text []byte) error {
+	switch string(text) {
+	case "plain":
+		*t = FileTypePlain
+	case "passwd":
+		*t = FileTypePasswd
+	default:
+		return fmt.Errorf("invalid file type %q", text)
+	}
+	return nil
+}
+
+func LoadConfig(path string) (*Config, error) {
+	var cfg Config
+
+	md, err := toml.DecodeFile(path, &cfg)
+	if err != nil {
+		return nil, err
+	}
+	undecoded := md.Undecoded()
+	if len(undecoded) != 0 {
+		return nil, fmt.Errorf("invalid fields used: %q", undecoded)
+	}
+
+	if cfg.StatePath == "" {
+		return nil, fmt.Errorf("statepath must not be empty")
+	}
+
+	for i, f := range cfg.Files {
+		if f.Url == "" {
+			return nil, fmt.Errorf(
+				"file[%d].url must not be empty", i)
+		}
+		if f.Path == "" {
+			return nil, fmt.Errorf(
+				"file[%d].path must not be empty", i)
+		}
+	}
+
+	return &cfg, nil
+}