First working version

[safcm/safcm.git] / cmd / safcm / config / packages.go

diff --git a/cmd/safcm/config/packages.go b/cmd/safcm/config/packages.go
new file mode 100644 (file)
index 0000000..60ddc87
--- /dev/null
+++ b/cmd/safcm/config/packages.go
@@ -0,0 +1,55 @@
+// Config: parse packages.yaml
+
+// Copyright (C) 2021  Simon Ruderich
+//
+// 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 (
+       "fmt"
+       "os"
+       "path/filepath"
+       "strings"
+
+       "gopkg.in/yaml.v2"
+)
+
+func LoadPackages(group string) ([]string, error) {
+       path := filepath.Join(group, "packages.yaml")
+
+       var res []string
+       x, err := os.ReadFile(path)
+       if err != nil {
+               if os.IsNotExist(err) {
+                       return nil, nil
+               }
+               return nil, err
+       }
+       err = yaml.UnmarshalStrict(x, &res)
+       if err != nil {
+               return nil, fmt.Errorf("%s: failed to load: %v", path, err)
+       }
+
+       // Sanity checks
+       for _, x := range res {
+               if len(strings.Fields(x)) != 1 {
+                       return nil, fmt.Errorf(
+                               "%s: package name %q must not contain whitespace",
+                               path, x)
+               }
+       }
+
+       return res, nil
+}