From 3f08711ea477461a832285b26bfb017770185825 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@open-infrastructure.net>
Date: Thu, 26 May 2016 10:56:10 +0200
Subject: Guessing default container script from
 /usr/share/container-tools/scripts/default symlink (if existing).

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>
---
 lib/container/create             | 31 +++++++++++++++++++++++++++----
 share/man/container-create.1.txt |  4 +++-
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/lib/container/create b/lib/container/create
index 0b0aa3a..dea1e76 100755
--- a/lib/container/create
+++ b/lib/container/create
@@ -103,11 +103,34 @@ then
 	exit 1
 fi
 
-SCRIPT="${SCRIPT:-debian}"
-
-if [ ! -e "/usr/share/container-tools/scripts/${SCRIPT}" ]
+if [ -z "${SCRIPT}" ]
 then
-	echo "'${SCRIPT}': no such script" >&2
+	if [ -e /usr/share/container-tools/scripts/default ]
+	then
+		TARGET="$(basename $(readlink /usr/share/container-tools/scripts/default))"
+
+		case "${TARGET}" in
+			container-tools_script)
+				TARGET="$(basename $(readlink /etc/alternatives/container-tools_script))"
+				;;
+		esac
+
+		if [ -e "/usr/share/container-tools/scripts/${TARGET}" ]
+		then
+			SCRIPT="${TARGET}"
+		else
+			echo "default -> '${TARGET}': no such script" >&2
+			exit 1
+		fi
+	else
+		SCRIPT="debian"
+	fi
+else
+	if [ ! -e "/usr/share/container-tools/scripts/${SCRIPT}" ]
+	then
+		echo "'${SCRIPT}': no such script" >&2
+		exit 1
+	fi
 fi
 
 CNT_AUTO="${CNT_AUTO:-$(hostname -f)}"
diff --git a/share/man/container-create.1.txt b/share/man/container-create.1.txt
index 2aeffc6..2553569 100644
--- a/share/man/container-create.1.txt
+++ b/share/man/container-create.1.txt
@@ -67,6 +67,9 @@ The following container scripts are available:
 *debconf*::
 	Advanced script to automatically create Debian based container, see container-create-debconf(1).
 
+*default*::
+	Symlink (if existing) to a container script which is used if no script was specified. On Debian based system this can be managed through update-alternatives(1), i.e. 'sudo update-alternatives --config container-tools_script'.
+
 
 EXAMPLES
 --------
@@ -76,7 +79,6 @@ EXAMPLES
 *Create example.net container using debconf script:*::
 	sudo container create -n example.net -s debconf
 
-
 SEE ALSO
 --------
 container-tools(7),
-- 
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