ppa:zealdocs is shorthand for the team's default PPA, ppa:zealdocs/ppa. Launchpad builds the binaries from the uploaded source package, once per series and architecture.

Files

debian/ is the Debian source package (Qt 6). rules is a thin dh wrapper, since CMake installs the binary, .desktop, metainfo, and icons under /usr.
zeal.recipe is the Launchpad recipe for nightly builds.

Target series

The series live in the SERIES variable at the top of publish-ppa.yaml. The floor is 24.04 (noble); 22.04's Qt 6.2 is too old (Zeal needs Qt >= 6.4.2). Launchpad rejects EOL or unknown series, so a stale entry only fails its own upload. Nightly series are set in the recipe on Launchpad.

Release uploads (`publish-ppa.yaml`)

On a release (or manual run with a version), the workflow builds a GPG-signed source package per series and dputs it to ppa:zealdocs/ppa, versioned 1:<version>-0ubuntu1~ubuntu<series>.1. The 1: epoch is required: the official archive package carries it (1:0.7.x), so without it a PPA build would sort below the archive and never reach users. The ~ubuntu<series> suffix orders correctly across series upgrades.

One-time setup (releases)

Create a passphrase-less ed25519 signing key with an encryption subkey. Launchpad confirms ownership via an encrypted email, so a sign-only key can't be registered:
```
gpg --quick-generate-key "Zeal Release <release@zealdocs.org>" ed25519 sign never
gpg --quick-add-key <keyid> cv25519 encr never
```
Publish the public key and register it on Launchpad. The account must have signed the Ubuntu CoC and have upload rights to ppa:zealdocs, and the key's UID email must be verified on that account:
```
gpg --keyserver keyserver.ubuntu.com --send-keys <keyid>
```
Add the fingerprint at https://launchpad.net/~/+editpgpkeys and confirm the email Launchpad sends. keyserver.ubuntu.com is append-only, so put only role addresses on the key, never a personal one.
Add the secret RELEASE_GPG_PRIVATE_KEY (armored key from gpg --armor --export-secret-keys <keyid>). Set RELEASE_GPG_PASSPHRASE only if the key has one (not recommended).

Nightly builds (Launchpad recipe)

Launchpad rebuilds nightlies from main itself, when main changes. No GitHub cron or signing secret, since the buildds sign internally.

One-time setup (nightly)

Create ppa:zealdocs/nightly.
Import the GitHub repo into Launchpad (Code -> Import) so lp:zeal is available.
Create a recipe (https://launchpad.net/~zealdocs/+recipes) from zeal.recipe. It nests pkg/ppa/debian into debian/ and versions via 1:{debupstream}-0~{revtime}, keeping each nightly below the next release and above the archive.
Set it to build into nightly, pick the series, and tick Build daily.
Request an initial build to confirm it works.

Local testing

Build a source package as the workflow does, then build the binary in a clean chroot:

VERSION=$(git describe --tags --abbrev=0 | sed 's/^v//')
ZEAL=~/zeal   # your checkout

# debuild looks for the .orig tarball in the parent directory.
git -C "$ZEAL" archive --prefix="zeal-${VERSION}/" "v${VERSION}" | gzip -9 \
    > "/tmp/zeal_${VERSION}.orig.tar.gz"
cd /tmp && tar xf "zeal_${VERSION}.orig.tar.gz" && cd "zeal-${VERSION}"
cp -r "$ZEAL/pkg/ppa/debian" debian

# Overwrite the seed changelog with a target-series entry, as the workflow does.
cat > debian/changelog <<EOF
zeal (1:${VERSION}-0ubuntu1~ubuntu24.04.1) noble; urgency=medium

  * Local test build.

 -- Zeal Release <release@zealdocs.org>  $(date -R)
EOF

debuild -S -us -uc                 # unsigned source package
sudo pbuilder build ../zeal_*.dsc  # binary against noble

README.md

Ubuntu PPA packaging