repo-add: allow signing of the package database

In order to be fully secure, we can't only sign packages. We also need
to sign our repository metadata to prevent database falsification,
dependency injection, etc. Add an '-s/--sign' option that allows this
functionality, and will generate a .sig file side-by-side with the
package database.

While at it, fix the issue where a signature file would never be found
because of 'cd' madness (this needs fixing in another commit).

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/repo-add.8.txt b/doc/repo-add.8.txt
index 75f49ef5..26009f67 100644
--- a/doc/repo-add.8.txt
+++ b/doc/repo-add.8.txt
@@ -43,6 +43,13 @@ Options
 	Force this program to keep quiet and run silent except for warning and
 	error messages.
 
+*-s, \--sign*::
+	Generate a PGP signature file using GnuPG. This will execute `gpg
+	--detach-sign --use-agent` on the generated database to generate a detached
+	signature file, using the GPG agent if it is available. The signature file
+	will be the entire filename of the database with a ``.sig'' extension.
+
+
 See Also
 --------
 linkman:makepkg[8], linkman:pacman[8]