Compare package files using different modes. See also:
pkgctl. More information: https://manned.org/pkgctl-diff.1.
pkgctl diff --list path/to/file|pkgname
pkgctl diff --diffoscope path/to/file|pkgname
.PKGINFO different mode:pkgctl diff --pkginfo path/to/file|pkgname
.BUILDINFO different mode:pkgctl diff --buildinfo path/to/file|pkgname