Gemini Datareduction Framework
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Affiliated Package Template Instructions

This package provides a template for packages that are affiliated with the Astropy project. This package design mirrors the layout of the main Astropy repository, as well as reusing much of the helper code used to organize Astropy. The instructions below describe how to take this template and adjust it for your particular affiliated package.

Everywhere below that the text yourpkg is shown, replace it with the name of your particular package.

Note: The instructions below assume you are using git for version control, as is used by the Astropy repository. If this is not the case, hopefully it will be clear from context what to do with your particular VCS.

  • Make sure Astropy is installed, as the template depends in part on Astropy to do its setup.

  • You may have already done this if you are looking at this file locally, but if not, you will need to obtain a copy of the package template. Assuming you have git installed, just do:

    git clone git:// yourpkg

    This will download the latest version of the template from github and place it in a directory named yourpkg.

  • Go into the directory you just created, and open the file with your favorite text editor. Follow the steps below to update it for your new package.

    1. Change the PACKAGENAME variable to whatever you decide your package should be named (for examples' sake, we will call it yourpkg). By tradition/very strong suggestion, python package names should be all lower-case.
    2. Change the DESCRIPTION variable to a short (one or few sentence) description of your package.
    3. Define a longer description as a string in the LONG_DESCRIPTION variable. You may want this to be the docstring of your package itself as Astropy does. In this case, simple add import yourpkg somewhere above, and set LONG_DESCRIPTION = yourpkg.__doc__. Alternatively, you may omit the description by deleting the variable and deleting the line where it is used in the setup() function further down.
    4. Add your name and email address by changing the AUTHOR and AUTHOR_EMAIL variables.
    5. If your affiliated package has a website, change URL to point to that site. Otherwise, you can leave it pointing to Astropy or just delete it.
    6. Exit out of your text editor
  • Now tell git to remember the changes you just made:

    git add
    git commit -m "adjusted for new project yourpkg"
  • Decide what license you want to use to release your source code. If you don't care and/or are fine with the Astropy license, just edit the file licenses/LICENSE.rst with your name (or your collaboration's name) at the top as the licensees. Otherwise, make sure to replace that file with whatever license you prefer, and update the LICENSE variable in to reflect your choice of license. You also may need to update the comment at the top of packagename/ to reflect your choice of license. Again, tell git about your changes:

    git add licenses/LICENSE.rst
    git add  # if you changed the license and modified
    git commit -m "updated license for new project yourpkg"
  • Take a moment to look over the packagename/, packagename/tests/, scripts/script_example, and packagename/example_c.pyx files, as well as the packagename/example_subpkg directory. These are examples of a pure-python module, a test script, an example command-line script, a Cython module, and a sub-package, respectively. (Cython is a way to compile python-like code to C to make it run faster - see the project's web site for details). These are provided as examples of standard way to lay these out. Once you understand these, though, you'll want to delete them (and later replace with your own):

    git rm packagename/
    git rm scripts/script_example
    git rm packagename/example_c.pyx
    git rm packagename/tests/
    git rm -r packagename/example_subpkg
    git commit -m "removed examples from package template"
  • Now rename the source code directory to match your project's name:

    git mv packagename yourpkg
    git commit -m "renamed template package source to new project yourpkg"
  • Adjust the information in the documentation to match your new project by editing the docs/ file.

    1. Change the project variable to your project's name (note that this does not need to be exactly the same as the package name, but that's a common convention).

    2. Update the author variable with your name or the name of your collaboration.

    3. Update the copyright variable for the current year.

    4. Change the following lines:

      import packagename
      # The short X.Y version.
      version = packagename.__version__.split('-', 1)[0]
      # The full version, including alpha/beta/rc tags.
      release = packagename.__version__


      import yourpkg
      # The short X.Y version.
      version = yourpkg.__version__.split('-', 1)[0]
      # The full version, including alpha/beta/rc tags.
      release = yourpkg.__version__

      where yourpkg is the name of your package.

    5. (optional) If you're hosting your source code on github, you can enable a sphinx extension that will link documentation pages directly to github's web site. To do this, uncomment the code in the "edit_on_github" section at the bottom of docs/, and replace packagename and reponame in that section with the name of your package and github repository.

  • Pass these changes on to git:

    git add docs/
    git commit -m "updated documentation for new project yourpkg"
  • Update the names of the documentation files to match your package's name. First open docs/index.rst in a text editor and change the text "packagename/index.rst" to e.g., "yourpkg/index.rst". Then do:

    git add docs/index.rst
    git mv docs/packagename docs/yourpkg
    git commit -m "Updated docs to reflect new project yourpkg"
  • Adjust the file to reflect your package's name by changing the line 4 from recursive-include packagename *.pyx *.c to recursive-include yourpkg *.pyx *.c and pass this onto git:

    ... edit as described above...
    git add
    git commit -m "updated for new project yourpkg"
  • Edit this file (README.rst) and delete all of this content, and replace it with a short description of your affiliated package. Inform git:

    git add README.rst
    git commit -m "replaced README for new project yourpkg"
  • (This step assumes your affiliated package is hosted as part of the astropy organization on Github. If it's instead hosted somewhere else, just adjust the URL in the instructions below to match wherever your repository lives) Now you will want to tell git that it should be pushing and pulling updates to the repository of your project, rather than the package template:

    git remote rename origin template
    git remote add upstream

    Now that it is pointing to the correct master, you should push everything up to your project and make sure that your local master is tied to your project rather than the template. You'll only be able to do this if your github repository is empty (if not, add the -f option to the push command - that will overwrite whatever is there):

    git push upstream master
    git branch master --set-upstream upstream/master
  • (optional) If you are adopting the standard workflow used by Astropy with github, you will also want to set up a fork of the repo on your own account, by going to the Github page and clicking the "fork" button on the upper right. Then run the following commands:

    git remote add origin
    git branch master --set-upstream origin/master

    Now you can push, pull, and branch whatever you want in your local fork without affecting the official version, but when you want to push something up to the main repository, just switch to the appropriate branch and do git push upstream master.

  • You're now ready to start doing actual work on your affiliated package. You will probably want to read over the developer guidelines of the Astropy documentation, and if you are hosting your code in GitHub, you might also want to read the Github help to ensure you know how to push your code to GitHub and some recommended workflows that work for the core Astropy project.

  • Once you have started work on the affiliated package, you should register your package with the Astropy affiliated package registry. Instructions for doing this will be provided on the Astropy website.

  • Good luck with your code and your science!