16306: Add note about dpkg-scanpackages.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>

diff --git a/cmd/arvados-package/cmd.go b/cmd/arvados-package/cmd.go
index b0c0e9e3c723918489f4ae0ecce889d102605123..16d1fe89be2906e13aa953517c00567085e2c252 100644 (file)
--- a/cmd/arvados-package/cmd.go
+++ b/cmd/arvados-package/cmd.go
@@ -105,6 +105,11 @@ Automation/integration notes:
        image, and be prepared to rebuild that VM image when package-building
        slows down (this will happen when new dependencies are introduced).
 
+       The "build" subcommand, if successful, also runs
+       dpkg-scanpackages to create/replace Packages.gz in the package
+       dir. This enables the "testinstall" subcommand to list the
+       package dir as a source in /etc/apt/sources.*.
+
 Options:
 `)
                flags.PrintDefaults()