build: allow release options only in combination with --release

It leads to weird expectations when using --db-update or --message
without --release. Make the behavior more user friendly, by aborting the
operation and explaining that release options only work in conjunction
with the release option.

Fixes #131

Signed-off-by: Christian Heusel <christian@heusel.eu>

1 files changed, 3 insertions, 1 deletions

diff --git a/doc/man/pkgctl-build.1.asciidoc b/doc/man/pkgctl-build.1.asciidoc
index 6ae3872..489926e 100644
--- a/doc/man/pkgctl-build.1.asciidoc
+++ b/doc/man/pkgctl-build.1.asciidoc
@@ -60,7 +60,9 @@ Release Options
 ---------------
 
 *-r, --release*::
-	Automatically commit, tag and release after building
+	Automatically commit, tag and release after building +
+	Specifying this option is required when using any of the following options
+	in this section
 
 *-m, --message* 'MSG'::
 	Use the given <msg> as the commit message