Add AUR (Arch Linux User Repository) packaging and auto-publish workflow

[mekwall]

Summary

Adds packaging support for the Arch Linux User Repository (AUR), alongside the existing deb/rpm/snap/chocolatey/homebrew packaging.

The package is published as bitbucket-cli-bin — a -bin variant that ships pre-built binaries from GitHub releases.

What's included

File	Purpose
packaging/aur/PKGBUILD	Package definition with real SHA256 checksums, LICENSE installation, optdepends for Secret Service backend, and shell completions (bash, zsh, fish)
packaging/aur/.SRCINFO	Machine-readable package metadata
.github/workflows/publish-aur.yml	GitHub Action — auto-publishes to AUR on release. Uses updpkgsums with manual fallback, pinned action commit SHA for supply chain security
README.md	Added Arch Linux installation section

Setup instructions (one-time, for the maintainer)

The GitHub Action can only update an existing AUR package. The initial submission must be done manually.

1. Create an AUR account

Register at https://aur.archlinux.org/register

2. Generate an SSH key for CI

ssh-keygen -t ed25519 -C "github-actions@bitbucket-cli"

3. Add the public key to your AUR account

Go to https://aur.archlinux.org → Account → SSH Keys → paste the public key

4. Add GitHub repository secrets

In this repo's Settings → Secrets and variables → Actions, add:

Secret	Value
AUR_SSH_PRIVATE_KEY	The ed25519 private key (full contents)
AUR_USERNAME	Your AUR username
AUR_EMAIL	Your AUR email

5. Create the initial AUR package (one-time, manual)

git clone ssh://aur@aur.archlinux.org/bitbucket-cli-bin.git
cd bitbucket-cli-bin
cp /path/to/bitbucket-cli/packaging/aur/PKGBUILD .
cp /path/to/bitbucket-cli/packaging/aur/.SRCINFO .
sed -i "s/^pkgver=.*/pkgver=0.18.0/" PKGBUILD
updpkgsums
makepkg --printsrcinfo > .SRCINFO
git add PKGBUILD .SRCINFO
git commit -m "Initial upload: bitbucket-cli-bin 0.18.0"
git push

After this, every new GitHub release will automatically update the AUR package via the workflow.

Notes

• Runtime dependency: gnome-keyring (optdepends) — provides the Secret Service daemon needed by go-keyring for credential storage. libsecret alone is a client library without a running daemon.
• License: MIT — automatically installed to /usr/share/licenses/bitbucket-cli-bin/LICENSE
• Dual architecture: x86_64 and aarch64
• Shell completions: bash, zsh, fish
• Supply chain security: The AUR publish action is pinned to commit da03e160 (v4.1.3) rather than a mutable tag

[Copilot]

Pull request overview

Adds Arch Linux AUR packaging support for the existing bb release distribution flow, including package metadata, an automated publish workflow, and README installation guidance.

Changes:

• Adds AUR PKGBUILD and .SRCINFO for bitbucket-cli-bin.
• Adds a GitHub Actions workflow to publish release updates to AUR.
• Documents Arch Linux installation via AUR helpers.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

File	Description
README.md	Adds Arch Linux AUR install instructions.
packaging/aur/PKGBUILD	Defines the AUR binary package and shell completion installation.
packaging/aur/.SRCINFO	Adds machine-readable AUR metadata.
.github/workflows/publish-aur.yml	Adds release-triggered AUR publishing workflow.

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