From 1fd2824832f5ec21977679631699689fff3f96ae Mon Sep 17 00:00:00 2001
From: Jessica Frazelle <princess@docker.com>
Date: Fri, 5 Jun 2015 18:18:27 -0700
Subject: [PATCH] update kernel install script

Signed-off-by: Jessica Frazelle <princess@docker.com>
---
 kernel-builder/Dockerfile     | 15 +--------------
 kernel-builder/install_kernel | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 14 deletions(-)
 create mode 100755 kernel-builder/install_kernel

diff --git a/kernel-builder/Dockerfile b/kernel-builder/Dockerfile
index 8a5b3df..f40f91e 100644
--- a/kernel-builder/Dockerfile
+++ b/kernel-builder/Dockerfile
@@ -14,19 +14,6 @@ WORKDIR $HOME
 
 ENV JOBS 4
 
-# add install_kernel helper func
-RUN { \
-		echo '\ninstall_kernel(){'; \
-		echo '\tlocal VERSION=$1'; \
-		echo '\n\tif [[ -z $VERSION ]]; then'; \
-		echo '\t\techo "Please specify a kernel version."'; \
-		echo '\t\treturn 1'; \
-		echo '\tfi\n'; \
-		echo '\tlocal MAJOR_VERSION=${VERSION:0:1}'; \
-		echo '\n\t[ -d /usr/src/linux-${VERSION} ] || curl -sSL https://www.kernel.org/pub/linux/kernel/v${MAJOR_VERSION}.x/linux-${VERSION}.tar.xz | tar -v -C /usr/src -xJ'; \
-		echo '\n\tcd /usr/src/linux-${VERSION}'; \
-		echo '\n\tnice -19 make -j$JOBS KDEB_PKGVERSION=$PKGVERSION INSTALL_MOD_STRIP=1 deb-pkg'; \
-		echo '}'; \
-	} >> ~/.bashrc
+COPY install_kernel /usr/local/bin/install_kernel
 
 CMD [ "bash" ]
diff --git a/kernel-builder/install_kernel b/kernel-builder/install_kernel
new file mode 100755
index 0000000..891e9f5
--- /dev/null
+++ b/kernel-builder/install_kernel
@@ -0,0 +1,25 @@
+#!/bin/bash
+set -e
+
+install_kernel(){
+	local VERSION=$1
+
+	if [[ -z $VERSION ]]; then
+		echo "Please specify a kernel version."
+		exit 1
+	fi
+
+	local MAJOR_VERSION=${VERSION:0:1}
+	
+	if [[ "$VERSION" == *-rc* ]]; then
+		[ -d /usr/src/linux-${VERSION} ] || curl -sSL https://kernel.org/pub/linux/kernel/v${MAJOR_VERSION}.x/testing/linux-${VERSION}.tar.xz | tar -v -C /usr/src -xJ
+	else
+		[ -d /usr/src/linux-${VERSION} ] || curl -sSL https://www.kernel.org/pub/linux/kernel/v${MAJOR_VERSION}.x/linux-${VERSION}.tar.xz | tar -v -C /usr/src -xJ
+	fi
+
+	cd /usr/src/linux-${VERSION}
+
+	nice -19 make -j$JOBS KDEB_PKGVERSION=$PKGVERSION INSTALL_MOD_STRIP=1 deb-pkg
+}
+
+install_kernel $@