1 files changed, 48 insertions, 0 deletions
diff --git a/datadir/datadir.go b/datadir/datadir.go
new file mode 100644
index 0000000..9019e5d
--- /dev/null
+++ b/datadir/datadir.go
@@ -0,0 +1,48 @@
+// data directory
+package datadir
+
+import (
+  "errors"
+  "io/fs"
+  "os"
+  "path/filepath"
+)
+
+// Get data directory path.
+func DataDir() (string, error) {
+  var dir string
+
+  // check environment
+  if val, ok := os.LookupEnv("CVEZ_DATA_DIR"); ok {
+    return val, nil
+  }
+
+  // get config dir
+  configDir, err := os.UserConfigDir()
+  if err != nil {
+    return dir, err
+  }
+
+  // build path to data directory in config dir
+  dir = filepath.Join(configDir, "cvez")
+  if _, err = os.Stat(dir); err != nil {
+    if errors.Is(err, fs.ErrNotExist) {
+      // create data directory
+      return dir, os.MkdirAll(dir, 0700)
+    } else {
+      // return error
+      return "", err
+    }
+  } else {
+    return dir, nil
+  }
+}
+
+// Build path to file in cvez data directory.
+func Join(args ...string) (string, error) {
+  if dir, err := DataDir(); err != nil {
+    return "", err
+  } else {
+    return filepath.Join(dir, filepath.Join(args...)), nil
+  }
+}