makepkg: put further restrictions on pkgbase

pkgbase should be subject to the same restrictions as pkgname

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/doc/PKGBUILD.5.txt b/doc/PKGBUILD.5.txt
index bc278f2e..770bd977 100644
--- a/doc/PKGBUILD.5.txt
+++ b/doc/PKGBUILD.5.txt
@@ -407,8 +407,10 @@ An optional global directive is available when building a split package:
 *pkgbase*::
 	The name used to refer to the group of packages in the output of makepkg
 	and in the naming of source-only tarballs. If not specified, the first
-	element in the `pkgname` array is used. The variable is not allowed to
-	begin with a hyphen.
+	element in the `pkgname` array is used. Valid characters for this
+	variable are alphanumerics, and any of the following characters:
+	```@ . _ + -`''. Additionally, the variable is not allowed to start with
+	hyphens or dots.
 
 
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