winpgbuild

A repo containing Github actions for building PostgreSQL and it's dependencies on Windows. A number of build tools are also included to enable reproducable builds, though these are generally downloaded as pre-built utilities.

Automation

We really need to automate the builds, as Github will only retain the artefacts for 90 days so we need to ensure they're kept fresh. Yes, we could upload them to S3 or something, but whatever...

Automating the build of all components is, tricky. Github has a limit of 20 workflows that can be called in a single workflow dispatch; and we use 2 per component, one to get the version, and one to run the build.

We could put everything into a single workflow (or maybe two or three), but that would become extremely difficult to navigate and maintain.

We could also dispatch workflow runs using the Github API, however, that doesn't give us an ID when we run a workflow so we can't poll for it's completion (and even if we did, we'd likely hit the API call quota quickly).

So for now, we're just running all workflows daily, at times determined by their "dependency group". We allow an hour for each group, and hope everything builds in time. If not, we may end up using the previous build of a dependency.

Version Information

Versions for each artifact are specified in manifest.json

Currently supported versions of PostgreSQL should work. All dependencies should automatically be included in the build, except for MIT Kerberos (the gssapi configuration option). See https://www.postgresql.org/message-id/CA%2BOCxoxwsgi8QdzN8A0OPGuGfu_1vEW3ufVBnbwd3gfawVpsXw%40mail.gmail.com for more information.

Adding a package.

• in manifest.json add an element to the array for the package. The elements are more or less in alphabetical order (libiconv being the exception)

Currently we only use name and version in workflows. source and license are informational.

{
    "name": "diffutils",
    "version": "2.8.7-1",
    "source": "https://downloads.sourceforge.net/project/gnuwin32/diffutils/2.8.7-1/diffutils-2.8.7-1-bin.zip",
    "licence": "https://git.savannah.gnu.org/cgit/diffutils.git/tree/COPYING"
},

then in the workflow file manifest.yml add an output in the outputs section.

DIFFUTILS_VERSION:
    description: "diffutils version"
    value: ${{ jobs.set_versions.outputs.output18 }}

A new output will need to be defined for the jobs.

    output18: ${{ steps.step1.outputs.DIFFUTILS_VERSION }}

after which a github output variable will be created named uppercase($name)_VERSION=$version and can be used in subsequent workflows.

Using this workflow from another workflow

All of the workflows can be called from another workflow, however you will have to provide your own version of manifest.json.

TODO

The following dependencies are yet to be completed:

• Perl
• Python
• TCL

The following dependencies haven't been supported on Windows but potentially could be in the future under Meson.

• Bonjour
• LLVM
• Readline (or libedit, as it's not GPL)