Adding new projects to wrap

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The wrap provider service is a simple web service that makes it easy to download build definitions for projects. It works in much the same way as Debian: we take the unaltered upstream source package and add a new build system to it as a patch. These build systems are stored as Git repositories on GitHub. They only contain build definition files. You may also think of them as an overlay to upstream source.

Creator script

The WrapDB repository has a helper script to generate new repositories, verify them and update them. The documentation below roughly explains what it does to create a new wrap repository using plain shell commands.

Choosing the repository name

Wrapped subprojects are used much like external dependencies. Thus they should have the same name as the upstream projects. If the project provides a pkg-config file, then the repository name should be the same as the pkg-config name. Usually this is the name of the project, such as libpng. Sometimes it is slightly different, however. As an example the libogg project's chosen pkg-config name is ogg instead of libogg, which is the reason why the repository is named plain ogg.

Adding new project to the Wrap provider service

Each project gets its own repo. It is initialized like this:

git init
git add readme.txt
git add
git commit -a -m 'Create project foobar'
git remote add origin <repo url>
git push -u origin master

Note that this is the only commit that will ever be made to master branch. All other commits are done to branches.

Repo names must fully match this regexp: [a-z0-9._]+.

Adding a new branch to an existing project

Create a new branch whose name matches the upstream release number.

git checkout master
git checkout -b 1.0.0
git push origin 1.0.0
(or from GitHub web page, remember to branch from master)

Branch names must fully match this regexp: [a-z0-9._]+.

Adding a new release to an existing branch

Here is where the magic happens. Whenever a new commit is pushed into GitHub's project branch, a new wrap is generated with an incremented version number. All the old releases remain unaltered. New commits are always done via GitHub merge requests and must be reviewed by someone other than the submitter.

Note that your Git repo must not contain the subdirectory of the source release. That gets added automatically by the service. You also must not commit any source code from the original tarball into the wrap repository.

First you need to fork the repository to your own page. Then you can create the first Wrap commit that usually looks something like this.

tar xzf libfoo_1.0.0.tar.gz
git clone -b 1.0.0 tmpdir
mv tmpdir/.git libfoo-1.0.0
rm -rf tmpdir
cd libfoo-1.0.0
git reset --hard
emacs upstream.wrap
<verify that your project builds and runs>
git add upstream.wrap
git commit -a -m 'Created wrap files for libfoo-1.0.0.'
git push origin 1.0.0

Now you can file a merge request. Remember to file it against branch 1.0.0 rather than master. GitHub should do this automatically.

Changes to original source

The point of a wrap is to provide the upstream project with as few changes as possible. Most projects should not contain anything more than a few Meson definition files. Sometimes it may be necessary to add a template header file or something similar. These should be held at a minimum.

It should especially be noted that there must not be any patches to functionality. All such changes must be submitted to upstream. You may also host your own Git repo with the changes if you wish. The Wrap system has native support for Git subprojects.

Reviewing wraps

See Wrap review guidelines.

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