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Recipes

Recipes are simple YAML files that must adhere to the following format:

name: template
version: "0.2"
url: "hxxps://www.example.com/releases/v0.2.tar.gz"
archive_name_change: # Optional; delete if not needed.
  - v0.2         # search pattern
  - template-0.2 # replace pattern
mussels_version: "0.2"
type: recipe
platforms:
  <platform>:
    <target>:
      build_script:
        configure: |
          <a shell script to configure prior to build>
        make: |
          <a shell script to build the software>
        install: |
          <a shell script to install the software>
      dependencies: []
      install_paths:
        <install location>:
          - <files or directories to be copied to the install location>
          - <files or directories to be copied to the install location>
          - <files or directories to be copied to the install location>
      patches: <patch directory>   # Optional; delete if not needed.
      required_tools:
        - <names of tools required for the build>
        - <names of tools required for the build>
        - <names of tools required for the build>

Recipe Fields, in Detail

name

The name of the library or application this recipe builds.

Tip: Mussels recipe names may not include the following characters: -, =, @, >, <, :. Instead, consider the humble underscore _.

version

The recipe version string is generally expected to follow traditional semantic versioning practices (i.e "<major>.<minor>.<patch>"), though any alpha-numeric version string should be fine. So long as the format is consistent across multiple versions, Mussels should be able to compare version strings for a given recipe.

url

The URL to be used to download a TAR or ZIP archive containing the source code to be built.

In the future, we would like to add support for local paths and Git repositories, but for the moment this must be a URL ending in .tar.gz or .zip.

archive_name_change (optional)

This optional field exists because some software packages are provided in zips or tarballs that have been renamed after creation, meaning that after extraction the resulting director does not have the same prefix as the original archive.

The archive_name_change list field should have 2 items:

  • The "search pattern"
  • The "replace pattern"

When downloaded, an archive will be renamed to replace the "search pattern" with the "replace pattern", thereby reverting the archive to it's true/original name so that when extracted - the resulting directory name will match the archive.

mussels_version

This version string defines which version of Musssels the recipe is written to work with. It is also the key used by Mussels to differentiate Mussels YAML files from any other YAML file.

The value must be "0.1"

type

Recipe type can either be one of:

  • recipe
  • collection

What is the difference between a recipe and a collection? Recipes have the url field, and include the fields build_script, install_paths, patches, and required_tools. Collections don't include any of the above. Collections just provide the dependencies lists.

platforms

The platforms dictionary allows you to define build instructions for different host platforms all in one file.

The <platform> keys under platforms may be one of the following^:

  • Darwin / macOS / OSX
  • Windows
  • Linux
  • Unix ( Darwin, FreeBSD, OpenBSD, SunOS, AIX, HP-UX )
  • Posix ( Unix and Linux )
  • FreeBSD
  • OpenBSD
  • SunOS
  • AIX
  • HP-UX

target

Each platform under platforms is itself also a dictionary and may contain one or more <target> keys.

Each target represents the built target architecture. On Posix systems, Mussels' default target is host and on Windows, it is the current architecture (either x64 or x86).

However, you may define the <target> name to be anything you like, representing the architecture of the machine intended to run the built software.

The target name must be provided by every dependency of your recipes for the given platform.

build_script

The build_script dictionary provides up to three (3) scripts used to build the software. On Posix systems these are each written to a shell script and executed, and on Windows these are written to a batch (.bat) scripts and executed.

These three scripts are each optional, but must be named as follows::

  • configure - Configure the build, only run the first time a build is run. This script is only run the first time you build a package and is skipped in subsequent builds so as to save compile time. If you need to re-run this step, build the recipe with the msl build --rebuild option.

    In many recipes, this step sets the "prefix" to the {install}/{target} directory, so the resulting binaries are automatically copied there when the install step runs make install.

  • make - Build the software.

  • install - Install the software to the .mussels/install/{target} directory

Within the scripts, curly braces are used to identify a few special variables that you may use to reference dependencies or the install path.

Variables available in Mussels 0.1 include:

  • {target} - The name of the build target (i.e. host / x64 / x86 or whatever you named it.)

  • {build}

    The build directory, found under .mussels/cache/work/{target}/<archive prefix>

  • {install}

    The .mussels/install/{target} directory (default), or the directory specified when building with the -i/--install option.

  • {includes}

    Shorthand for the {install}/include directory.

  • {libs}

    Shorthand for the {install}/lib directory.

dependencies

The dependencies list may either be empty ([]), meaning no dependencies, or may be a list of other recipes names with version numbers and even cookbooks specified if so desired.

Some fictional examples:

      dependencies:
        - meepioux
        - blarghus>=1.2.3
        - wheeple@0.2.0
        - pyplo==5.1.0g
        - "scrapbook:sasquatch<2.0.0"
        - "scrapbook:minnow<0.1.12"

install_paths

The install_paths provides lists of files and directories to be copied to a specific path under {install}.

patches (optional)

This optional field provides the name of a directory provided alongside the recipe YAML file that contains a patch set to be applied to the source before any of the build scripts are run.

required_tools

This list of required tools defines which tools much be present on the host platform in order to do the build. Like the dependencies, these lists may include version numbers and cookbook names in the format:

[cookbook:]name[>=,<=,>,<,(==|=|@)version]

Some fictional examples:

      required_tools:
        - "scrapbook:pkgfiend<1.1.1"
        - appmaker

Example Recipe Definition

This recipe, copypasted from the clamav cookbook defines how to build libpcre2.

Several notable things about this recipe...

The recipe provides instructions for 3 platforms: Darwin, Linux, and Windows.

For Windows, it provides build instructions targeting both x64 and x86, but for the others, it simply provides host.

In the configure script, the install "prefix" is set for the package in the Linux and Mac recipes. This is often necessary to configure the software to be used from the install directory.

The Windows instructions omit the install script. All scripts are optional, but the install step is often not requires for Windows. The Darwin and Linux recipes also make use of install_name_tool (provided by Clang), and patchelf (an additional required tool) to set the RPATH for each executable so that dynamic libraries may be found at runtime.

name: pcre2
version: "10.33"
url: https://ftp.pcre.org/pub/pcre/pcre2-10.33.tar.gz
mussels_version: "0.2"
type: recipe
platforms:
  Darwin:
    host:
      build_script:
        configure: |
          ./configure --prefix="{install}/{target}" --disable-dependency-tracking
        make: |
          make
        install: |
          make install
          install_name_tool -add_rpath @executable_path/../lib "{install}/lib/libpcre2-8.dylib"
      dependencies:
        - bzip2
        - zlib
      install_paths:
        license/pcre2:
          - COPYING
      required_tools:
        - make
        - clang
  Linux:
    host:
      build_script:
        configure: |
          chmod +x ./configure ./install-sh
          ./configure --prefix="{install}/{target}" --disable-dependency-tracking
        make: |
          make
        install: |
          make install
          patchelf --set-rpath '$ORIGIN/../lib' "{install}/lib/libpcre2-8.so"
      dependencies:
        - bzip2
        - zlib
      install_paths:
        license/pcre2:
          - COPYING
      required_tools:
        - make
        - gcc
        - patchelf
  Windows:
    x64:
      build_script:
        configure: |
          CALL cmake.exe -G "Visual Studio 15 2017 Win64" \
              -DBUILD_SHARED_LIBS=ON \
              -DZLIB_INCLUDE_DIR="{includes}" \
              -DZLIB_LIBRARY_RELEASE="{libs}/zlibstatic.lib" \
              -DBZIP2_INCLUDE_DIR="{includes}" \
              -DBZIP2_LIBRARY_RELEASE="{libs}/libbz2.lib"
        make: |
          CALL cmake.exe --build . --config Release
      dependencies:
        - bzip2<1.1.0
        - zlib
      install_paths:
        include:
          - pcre2.h
        lib:
          - Release/pcre2-8.dll
          - Release/pcre2-8.lib
        license/openssl:
          - COPYING
      patches: pcre2-10.33-patches
      required_tools:
        - cmake
        - visualstudio>=2017
    x86:
      build_script:
        configure: |
          CALL cmake.exe -G "Visual Studio 15 2017" \
              -DBUILD_SHARED_LIBS=ON \
              -DZLIB_INCLUDE_DIR="{includes}" \
              -DZLIB_LIBRARY_RELEASE="{libs}/zlibstatic.lib" \
              -DBZIP2_INCLUDE_DIR="{includes}" \
              -DBZIP2_LIBRARY_RELEASE="{libs}/libbz2.lib"
        make: |
          CALL cmake.exe --build . --config Release
      dependencies:
        - bzip2<1.1.0
        - zlib
      install_paths:
        include:
          - pcre2.h
        lib:
          - Release/pcre2-8.dll
          - Release/pcre2-8.lib
        license/openssl:
          - COPYING
      patches: pcre2-10.33-patches
      required_tools:
        - cmake
        - visualstudio>=2017