rattler_build_script 0.1.0

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# rattler-build: a fast conda-package builder

The `rattler-build` tooling and library creates cross-platform relocatable
binaries / packages from a simple recipe format. The recipe format is heavily
inspired by `conda-build` and `boa`, and the output of a regular `rattler-build`
run is a package that can be installed using [`pixi`](https://github.com/prefix-dev/pixi), [`mamba`](https://github.com/mamba-org/mamba), or [`conda`](https://conda.org).

`rattler-build` is a standalone binary written from scratch in Rust, and does not have any dependencies on `conda-build` or Python.

![](https://github.com/prefix-dev/rattler-build/assets/885054/98377399-aae4-45a5-a4e9-982a3c7b2d50)

### Installation

You can grab a prerelease version of `rattler-build` from the [Github
Releases](https://github.com/prefix-dev/rattler-build/releases/).

It is (of course) also available from conda-forge:

```bash
pixi global install rattler-build
# or with micromamba
micromamba install rattler-build -c conda-forge
```

### Distro Packages

[![Packaging status](https://repology.org/badge/vertical-allrepos/rattler-build.svg)](https://repology.org/project/rattler-build/versions)

#### Homebrew

You can install `rattler-build` via Homebrew:

```
brew install rattler-build
```

#### Arch Linux

`rattler-build` is available on Arch Linux in the [extra repository](https://archlinux.org/packages/extra/x86_64/rattler-build/):

```
pacman -S rattler-build
```

#### Alpine Linux

`rattler-build` is available for [Alpine Edge](https://pkgs.alpinelinux.org/packages?name=rattler-build&branch=edge). It can be installed via [apk](https://wiki.alpinelinux.org/wiki/Alpine_Package_Keeper) after enabling the [testing repository](https://wiki.alpinelinux.org/wiki/Repositories).

```shell
apk add rattler-build
```

#### Dependencies

Currently `rattler-build` needs some dependencies on the host system which are
executed as subprocess. We plan to reduce the number of external dependencies
over time by writing what we need in Rust to make `rattler-build` fully
self-contained.

* `install_name_tool` is necessary on macOS to rewrite the `rpath` of shared
  libraries and executables to make it relative
* `patchelf` is required on Linux to rewrite the `rpath` and `runpath` of shared
  libraries and executables
* `git` is required to checkout Git repositories.
* `msvc` on Windows because we cannot ship the MSVC compiler on conda-forge
  (needs to be installed on the host machine)

### Documentation

We have extensive documentation for `rattler-build`. You can find the [book
here](https://prefix-dev.github.io/rattler-build).

### GitHub Action

There is a GitHub Action for `rattler-build`. It can be used to install `rattler-build` in CI/CD workflows and run a build command. Please check out the [GitHub Action documentation](https://github.com/prefix-dev/rattler-build-action) for more information.

### Usage

`rattler-build` comes with two commands: `build` and `test`.

The `build` command takes a `--recipe recipe.yaml` as input and produces a
package as output. The `test` subcommand can be used to test existing packages
(tests are shipped with the package).

There is also a [terminal user interface (TUI)](https://prefix-dev.github.io/rattler-build/latest/tui/) that can help with building multiple packages and easily viewing logs.

### Playground

Want to try `rattler-build` recipes without installing anything? The [online playground](https://playground.rattler.build/) lets you edit recipes, tweak variant configurations, and see evaluated output — all in the browser.

### The recipe format

> **Note** You can find all examples below in the [`examples`](https://github.com/prefix-dev/rattler-build/tree/main/examples)
> folder and run them with `rattler-build`.

A simple example recipe for the `xtensor` header-only C++ library:

```yaml
context:
  name: xtensor
  version: 0.24.6

package:
  name: ${{ name|lower }}
  version: ${{ version }}

source:
  url: https://github.com/xtensor-stack/xtensor/archive/${{ version }}.tar.gz
  sha256: f87259b51aabafdd1183947747edfff4cff75d55375334f2e81cee6dc68ef655

build:
  number: 0
  script:
    - if: win
      then: |
        cmake -G "Ninja" -D BUILD_TESTS=OFF -D CMAKE_INSTALL_PREFIX=%LIBRARY_PREFIX% %SRC_DIR%
        ninja install
      else: |
        cmake ${CMAKE_ARGS} -G "Ninja" -DBUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$PREFIX $SRC_DIR -DCMAKE_INSTALL_LIBDIR=lib
        ninja install

requirements:
  build:
    - ${{ compiler('cxx') }}
    - cmake
    - ninja
  host:
    - xtl >=0.7,<0.8
  run:
    - xtl >=0.7,<0.8
  run_constraints:
    - xsimd >=8.0.3,<10

tests:
  - script:
    - if: unix or emscripten
      then:
        - test -d ${PREFIX}/include/xtensor
        - test -f ${PREFIX}/include/xtensor/xarray.hpp
        - test -f ${PREFIX}/share/cmake/xtensor/xtensorConfig.cmake
        - test -f ${PREFIX}/share/cmake/xtensor/xtensorConfigVersion.cmake
    - if: win
      then:
        - if not exist %LIBRARY_PREFIX%\include\xtensor\xarray.hpp (exit 1)
        - if not exist %LIBRARY_PREFIX%\share\cmake\xtensor\xtensorConfig.cmake (exit 1)
        - if not exist %LIBRARY_PREFIX%\share\cmake\xtensor\xtensorConfigVersion.cmake (exit 1)

about:
  homepage: https://github.com/xtensor-stack/xtensor
  license: BSD-3-Clause
  license_file: LICENSE
  summary: The C++ tensor algebra library
  description: Multi dimensional arrays with broadcasting and lazy computing
  documentation: https://xtensor.readthedocs.io
  repository: https://github.com/xtensor-stack/xtensor

extra:
  recipe-maintainers:
    - some-maintainer
```

<details>
  <summary>
    A recipe for the `rich` Python package (using `noarch`)
  </summary>

```yaml
context:
  version: "13.4.2"

package:
  name: "rich"
  version: ${{ version }}

source:
  - url: https://pypi.io/packages/source/r/rich/rich-${{ version }}.tar.gz
    sha256: d653d6bccede5844304c605d5aac802c7cf9621efd700b46c7ec2b51ea914898

build:
  # Thanks to `noarch: python` this package works on all platforms
  noarch: python
  script:
    - python -m pip install . -vv

requirements:
  host:
    - pip
    - poetry-core >=1.0.0
    - python 3.10.*
  run:
    # sync with normalized deps from poetry-generated setup.py
    - markdown-it-py >=2.2.0
    - pygments >=2.13.0,<3.0.0
    - python 3.10.*
    - typing_extensions >=4.0.0,<5.0.0

tests:
  - python:
      imports:
        - rich
      pip_check: true

about:
  homepage: https://github.com/Textualize/rich
  license: MIT
  license_file: LICENSE
  summary: Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal
  description: |
    Rich is a Python library for rich text and beautiful formatting in the terminal.

    The Rich API makes it easy to add color and style to terminal output. Rich
    can also render pretty tables, progress bars, markdown, syntax highlighted
    source code, tracebacks, and more — out of the box.
  documentation: https://rich.readthedocs.io
  repository: https://github.com/Textualize/rich
```
</details>

<details>
<summary>A recipe for the `curl` library</summary>

```yaml
context:
  version: "8.0.1"

package:
  name: curl
  version: ${{ version }}

source:
  url: http://curl.haxx.se/download/curl-${{ version }}.tar.bz2
  sha256: 9b6b1e96b748d04b968786b6bdf407aa5c75ab53a3d37c1c8c81cdb736555ccf

build:
  number: 0

requirements:
  build:
    - ${{ compiler('c') }}
    - if: win
      then:
        - cmake
        - ninja
    - if: unix
      then:
        - make
        - perl
        - pkg-config
        - libtool
  host:
    - if: linux
      then:
        - openssl

about:
  homepage: http://curl.haxx.se/
  license: MIT/X derivate (http://curl.haxx.se/docs/copyright.html)
  license_file: COPYING
  summary: tool and library for transferring data with URL syntax
  description: |
    Curl is an open source command line tool and library for transferring data
    with URL syntax. It is used in command lines or scripts to transfer data.
  documentation: https://curl.haxx.se/docs/
  repository: https://github.com/curl/curl
```

For this recipe, two additional script files (`build.sh` and `build.bat`) are
needed.

**`build.sh`**

```bash
#!/bin/bash

# Get an updated config.sub and config.guess
cp $BUILD_PREFIX/share/libtool/build-aux/config.* .

if [[ $target_platform =~ linux.* ]]; then
    USESSL="--with-openssl=${PREFIX}"
else
    USESSL="--with-secure-transport"
fi;

./configure \
    --prefix=${PREFIX} \
    --host=${HOST} \
    ${USESSL} \
    --with-ca-bundle=${PREFIX}/ssl/cacert.pem \
    --disable-static --enable-shared

make -j${CPU_COUNT} ${VERBOSE_AT}
make install

# Includes man pages and other miscellaneous.
rm -rf "${PREFIX}/share"
```

**`build.bat`**

```cmd
mkdir build

cmake -GNinja ^
      -DCMAKE_BUILD_TYPE=Release ^
      -DBUILD_SHARED_LIBS=ON ^
      -DCMAKE_INSTALL_PREFIX=%LIBRARY_PREFIX% ^
      -DCMAKE_PREFIX_PATH=%LIBRARY_PREFIX% ^
      -DCURL_USE_SCHANNEL=ON ^
      -DCURL_USE_LIBSSH2=OFF ^
      -DUSE_ZLIB=ON ^
      -DENABLE_UNICODE=ON ^
      %SRC_DIR%

IF %ERRORLEVEL% NEQ 0 exit 1

ninja install --verbose
```

</details>