//! Opening the repo a command acts on, and the tree lookups commands share.

module cli

import os
import src.history
import src.snapshot
import src.storage

pub fn repo_root() !string {
	root := storage.find_root(os.getwd()) or {
		return error('not inside a koh repo — run "koh init" here, or "koh steal <name>"')
	}
	return root
}

pub fn open_store() !storage.Store {
	root := repo_root()!
	return storage.open(root)!
}

// tree_of builds the tree a save records, for diffing.
pub fn tree_of(store &storage.Store, save_id string) !snapshot.Tree {
	return snapshot.Tree{
		files: history.files_of(store, save_id)!
	}
}

pub fn working_tree(store &storage.Store) !snapshot.Tree {
	return snapshot.Tree{
		root:  store.root
		files: snapshot.walk(store, store.root, snapshot.load(store.root))!
	}
}

pub fn label(store &storage.Store, id string) string {
	save := history.by_id(store, id) or { return id }
	return '${save.id} ${save.message}'
}