Properly add challenge.yml for templates into the poetry built package (#139)

* Have poetry run a preprocess script which replaces the challenge.yml symlinks with the actual file contents

Author: ColdHeat

preprocess.py

@@ -0,0 +1,9 @@
+import os
+
+
+def replace_symlinks():
+    os.system("""find . -type l -exec sh -c 'target=$(readlink -f "$0"); rm "$0" && cp "$target" "$0"' {} \;""")
+
+
+if __name__ == "__main__":
+    replace_symlinks()

pyproject.toml

@@ -8,6 +8,11 @@ readme = "README.md"
 [tool.poetry.scripts]
 ctf = "ctfcli.__main__:main"
 
+[tool.poetry.build]
+# I don't understand why poetry doesn't seem to be following symlinks. 
+# This script resolves the symlinks in the templates to the example challenge spec
+script = "preprocess.py"
+
 [tool.poetry.dependencies]
 python = "^3.8"
 python-frontmatter = "^1.0.0"