From: W. Trevor King <wking@tremily.us>
Date: Thu, 31 Jul 2014 03:15:23 +0000 (-0700)
Subject: trim.sh: Remove build-only dependencies with --depclean
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=50da07cd71e77f15d60e558786537c281fdb99e0;p=dockerfile.git

trim.sh: Remove build-only dependencies with --depclean

Use '--with-bdeps=n' to tell Portage to ignore build-time dependencies
(e.g. an ebuild's DEPEND).  Only the runtime dependencies (an ebuild's
RDEPEND and PDEPEND) are taken into acount when selecting packages
required by @world.  That lets us keep what we need to run the target
application, but remove all the build tooling (including GCC), leaving
a functional, lightweight image.
---

diff --git a/trim.sh b/trim.sh
index 1091a69..3a68a54 100755
--- a/trim.sh
+++ b/trim.sh
@@ -49,14 +49,12 @@ trim()
 	#sys-apps/openrc     (/sbin/rc)
 	#sys-apps/net-tools  (/bin/hostname)
 	#sys-devel/gettext   (/usr/bin/envsubst)
-	# unmerge GCC to break the GCC <-> libc dependency loop
 	docker run -t --name "${CONTAINER}" \
 		-v "${PWD}/empty-system.py:/tmp/empty-system.py" \
 		"${IMAGE}" /bin/bash -c "
 			/tmp/empty-system.py &&
 			emerge --noreplace app-shells/bash sys-apps/net-tools sys-apps/openrc sys-devel/gettext &&
-			emerge --unmerge sys-devel/gcc &&
-			emerge -v --depclean &&
+			emerge -v --with-bdeps=n --depclean &&
 			rm -rf /usr/portage" ||
 		die "failed to create ${CONTAINER}"
 	docker export "${CONTAINER}" | docker import - "${IMG}" ||