Generate a filesystem tree from a macro or a YAML tree.
When I write integration tests, I often find myself needing to create temporary files and directories. Therefore, I created this crate which provides both a library to use in a Rust code and a CLI program that generates a filesystem tree according to a YAML structure.
Go to docs.rs for the full API reference.
FileSystemTree::build is faster than MergeableFileSystemTree::build but it does not write over an existing directory and it does not create parent directories when they don't exist.
use build_fs_tree::{FileSystemTree, Build, dir, file};
let tree: FileSystemTree<&str, &str> = dir! {
"index.html" => file!(r#"
<!DOCTYPE html>
<link rel="stylesheet" href="styles/style.css" />
<script src="scripts/main.js"></script>
"#)
"scripts" => dir! {
"main.js" => file!(r#"document.write('Hello World')"#)
}
"styles" => dir! {
"style.css" => file!(r#":root { color: red; }"#)
}
};
tree.build("public").unwrap();Unlike FileSystemTree::build, MergeableFileSystemTree::build can write over an existing directory and create parent directories that were not exist before at the cost of performance.
You can convert a FileSystemTree into a MergeableFileSystemTree via From::from/Into::into and vice versa.
use build_fs_tree::{MergeableFileSystemTree, Build, dir, file};
let tree = MergeableFileSystemTree::<&str, &str>::from(dir! {
"public" => dir! {
"index.html" => file!(r#"
<!DOCTYPE html>
<link rel="stylesheet" href="styles/style.css" />
<script src="scripts/main.js"></script>
"#)
"scripts/main.js" => file!(r#"document.write('Hello World')"#)
"scripts/style.css" => file!(r#":root { color: red; }"#)
}
});
tree.build(".").unwrap();Both FileSystemTree and MergeableFileSystemTree implement serde::Deserialize and serde::Serialize.
The name of the command is build-fs-tree. It has 2 subcommands: create and populate.
This command reads YAML from stdin and creates a new filesystem tree. It is the CLI equivalent of FileSystemTree.
Create two text files in a new directory:
echo '{ foo.txt: HELLO, bar.txt: WORLD }' | build-fs-tree create foo-and-barCreate a text file and its parent directories:
echo '{ text-files: { foo.txt: HELLO } }' | build-fs-tree create filesCreate a new filesystem tree from a YAML file:
build-fs-tree create root < fs-tree.yamlThis command reads YAML from stdin and either creates a new filesystem tree or add files and directories to an already existing directories. It is the CLI equivalent of MergeableFileSystemTree.
Create two text files in the current directory:
echo '{ foo.txt: HELLO, bar.txt: WORLD }' | build-fs-tree populate .Create a text file and its parent directories:
echo '{ files/text-files/foo.txt: HELLO }' | build-fs-tree populate .Populate the current directory with filesystem tree as described in a YAML file:
build-fs-tree populate . < fs-tree.yaml
It has the features I desired: Easy to read and write, multiline strings done right.
According to the UNIX philosophy, you may pipe your cool configuration format to a program that converts it to JSON (YAML is a superset of JSON) and then pipe the JSON output to build-fs-tree.
