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bin+lib amble

First class, scalable rust project generator with batteries included

37 releases

0.1.60 Nov 16, 2023
0.1.59 Oct 28, 2023

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CI Build Status Release Tag Build Status License Docs Latest Version rustc 1.70+

First class, scalable rust project generator with batteries included. Amble is https://github.com/refcell/amble/labels/stable

Install | User Docs | Crate Docs | Reference | Contributing | License

What is amble?

amble is a cli application for generating rust projects with batteries included. By using a workspace and sub-crates, amble scales to any number of crates.

You can think of amble as an extension of cargo init. Cargo provides convenience methods for generating new project structures, the two primary types being a library or a binary project. Below is an example of the directory structure generated by cargo init --lib. (A binary project would only differ in having a main.rs file instead of lib.rs).

├─ Cargo.toml
└─ src
   └─ lib.rs

amble provides a more extensive cli command for generating project directory structures with workspaces. Library sub-crates are nested inside the cannonical crates/ directory, while binary crates are nested inside the bin/ directory. A top-level Cargo.toml file defines a workspace including the binaries and libraries as well as shared package metadata and dependencies, minimizing inconsistencies across the sub-crates. amble also exposes the --lib and --bin flags which fallback to cargo init and create the default cargo init file structure with all amble batteries included and available through cli flags.

Below is an example waterfall directory structure output for when amble is run with the argument project as the project name.

├─ Cargo.toml
├─ bin
│  └─ example
│     ├─ Cargo.toml
│     └─ src
│        └─ main.rs
└─ crates
   └─ common
      ├─ Cargo.toml
      └─ src
         └─ lib.rs

As detailed in Usage below, this output is generated by running amble project --dry-run.


Install amble using cargo.

cargo install amble

Alternatively, amble can be built from source.

git clone git@github.com:refcell/amble.git && cd amble
cargo build --release

To run amble, it is recommended to first run it in dry mode which will print a waterfall directory structure for the files that would be created when run without dry mode. Simply run amble <project_name> --dry-run, where <project_name> is the name of the project/directory you want to create.

By default, amble uses the current directory for the project name, so it is perfectly acceptable to run amble --dry-run, which will just use . as the project path. Note, amble will exit if it finds cargo artifacts in the directory you chose to execute in.

To run amble out of dry mode, just run amble!

A pre-defined github action ci workflow can be automatically generated by passing in the --with-ci flag to amble. This would generate a directory structure as follows (amble --dry-run --with-ci).

├─ Cargo.toml
├─ bin
│  └─ example
│     ├─ Cargo.toml
│     └─ src
│        └─ main.rs
├─ crates
│  └─ common
│     ├─ Cargo.toml
│     └─ src
│        └─ lib.rs
└─ .github
   └─ workflows
      └─ ci.yml

Amble also provides fallthrough methods for generating cargo init library and binary projects with batteries such as a templated readme, github action ci workflows, and licensing. The flags to pass through to cargo init operations are injective, meaning amble --bin will pass through to cargo init --bin and amble --lib will pass through to cargo init --lib. As usual, any other valid amble flag can be provided along with the --lib and --bin flags.

CLI Flags

Below is an inexhaustive list of the main cli flags. These are subject to change and new ones can be added. To view a more up-to-date list, run the amble --help command locally.

First class, scalable rust project generator with batteries included.

Usage: amble [OPTIONS] [PROJECT_DIR]

  [PROJECT_DIR]  The path to the project directory. By default, the current working directory is used. If any rust artifacts are detected in the specified or unspecified directory, an error will be thrown [default: .]

  -v, --v...                         Verbosity level (0-4)
      --dry-run                      Dry run mode. If this flag is provided, the cli will not execute commands, printing the directories and files that would be created instead
      --overwrite                    Overwrite existing files. If this flag is provided, the cli will overwrite existing files
      --bare                         Bare mode. Only for `--bin` and `--lib` flags. If specified, generated files will be the basic `cargo init` files
  -n, --name <NAME>                  The project name. This will be used for the binary application name [default: example]
  -w, --with-ci                      Add github actions ci workflow
  -c, --ci-yml <CI_YML>              Copy the specified ci workflow file to the project's `.github/workflows/` directory
  -a, --authors <AUTHORS>            Override the project authors
  -b, --bin                          Builds a cargo binary project
  -l, --lib                          Builds a cargo library project
      --without-readme               Prevents a readme from being generated
      --full                         Full generates a full project structure including license, ci, gitignore, etc
      --etc                          Adds an `etc/` directory to the project. This _Et Cetera_ directory is used for storing miscellaneous files
      --assets                       Adds template assets to the `etc/` directory of the generate project. Will be run automatically if the `--full` flag is provided
      --license                      Adds an MIT License to the project. The MIT License type can be overridden with the `--with-license` flag
      --gitignore                    Adds a Gitignore file to the project
  -d, --description <DESCRIPTION>    Specifies the description of the project in the top-level `Cargo.toml` workspace
      --dependencies <DEPENDENCIES>  Adds these dependencies to the top-level `Cargo.toml` workspace alongside the default dependencies
      --list                         Lists the default dependencies
      --with-license <WITH_LICENSE>  License Override. This will override the default MIT License. The license type must be a valid SPDX license identifier
  -h, --help                         Print help
  -V, --version                      Print version

You can generate this output by running amble --help.


All contributions are welcome! Experimentation is highly encouraged and new issues are welcome.

Troubleshooting & Bug Reports

Please check existing issues for similar bugs or open an issue if no relevant issue already exists.


This project is licensed under the MIT License. Free and open-source, forever. All our rust are belong to you.


~594K SLoC