pkgctl build: support worker slots for none tty builds

Allow overriding the worker slot with a dedicated option. Furthermore
detect if the current tty is no pts and fall back to choosing a random
worker slot between 1 and number of available processing units.

Fixes #137

Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/doc/man/pkgctl-build.1.asciidoc b/doc/man/pkgctl-build.1.asciidoc
index 489926e..f68e7cf 100644
--- a/doc/man/pkgctl-build.1.asciidoc
+++ b/doc/man/pkgctl-build.1.asciidoc
@@ -38,6 +38,12 @@ Build Options
 *-I, --install* 'FILE'::
 	Install a package into the working copy of the chroot
 
+*-w, --worker* 'SLOT'::
+	Name of the worker slot, useful for concurrent builds. By default the slot
+	is automatically assigned to the current tty pts number. In case the caller
+	is not a tty, choose a random slot between 1 and number of available
+	processing units.
+
 *--nocheck*::
 	Do not run the check() function in the PKGBUILD