Move source files to root dir

dev/testdata/generate_testdata.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"git.defalsify.org/festive/testdata"
+)
+
+func main() {
+	var err error
+	if len(os.Args) > 1 {
+		err = testdata.GenerateTo(os.Args[1])
+	} else {
+		_, err = testdata.Generate()
+	}
+	if err != nil {
+		os.Exit(1)
+	}
+	fmt.Println(testdata.DataDir)
+}