Adding debconf support for image selection in curl container create script (FIXME).

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>

3 files changed, 163 insertions, 1 deletions

diff --git a/share/scripts/curl b/share/scripts/curl
index 49d7f71..a7d506c 100755
--- a/share/scripts/curl
+++ b/share/scripts/curl
@@ -100,6 +100,47 @@ Usage ()
 	exit 1
 }
 
+Debconf ()
+{
+	# Configure local debconf
+	mkdir -p /tmp/container-tools
+	DEBCONF_TMPDIR="$(mktemp -d -p /tmp/container-tools -t $(basename ${0}).XXXX)"
+	export DEBCONF_TMPDIR
+
+	mkdir -p "${DEBCONF_TMPDIR}/debconf"
+
+cat > "${DEBCONF_TMPDIR}/debconf.systemrc" << EOF
+Config: configdb
+Templates: templatedb
+
+Name: config
+Driver: File
+Mode: 644
+Reject-Type: password
+Filename: ${DEBCONF_TMPDIR}/debconf/config.dat
+
+Name: passwords
+Driver: File
+Mode: 600
+Backup: false
+Required: false
+Accept-Type: password
+Filename: ${DEBCONF_TMPDIR}/debconf/passwords.dat
+
+Name: configdb
+Driver: Stack
+Stack: config, passwords
+
+Name: templatedb
+Driver: File
+Mode: 644
+Filename: ${DEBCONF_TMPDIR}/debconf/templates.dat
+EOF
+
+	DEBCONF_SYSTEMRC="${DEBCONF_TMPDIR}/debconf.systemrc"
+	export DEBCONF_SYSTEMRC
+}
+
 Parameters "${@}"
 
 if [ -z "${NAME}" ]
@@ -126,13 +167,36 @@ then
 fi
 
 ARCHITECTURE="${ARCHITECTURE:-$(dpkg --print-architecture)}"
-IMAGE="${IMAGE:-debian-stretch-${ARCHITECTURE}.tar.xz}"
 SERVER="${SERVER:-https://files.open-infrastructure.net/images/container-tools/current}"
 PASSWORD="${PASSWORD:-$(dd if=/dev/urandom bs=12 count=1 2> /dev/null | base64)}"
 
 VERSION="$(container version)"
 
 # Run
+if [ -z "${IMAGE}" ]
+then
+	Debconf
+
+	# Run debconf parts
+	for SCRIPT in /usr/share/container-tools/scripts/curl.d/*
+	do
+		if [ -x "${SCRIPT}" ]
+		then
+			# FIXME
+			# debconf -ocontainer-tools "${SCRIPT}"
+			"${SCRIPT}"
+		fi
+	done
+
+	# Read-in configuration from debconf
+	. "${DEBCONF_TMPDIR}/debconf.default"
+fi
+
+if [ -z "${IMAGE}" ]
+then
+	echo "no image selected, doing nothing." >&2
+	exit 1
+fi
 
 # FIXME: Show available image directories on server
 # FIXME: Fetch debconf-choices.txt to show debconf select
@@ -202,3 +266,7 @@ case "${CLEAN}" in
 		rm -f "${CACHE}/${IMAGE}"
 		;;
 esac
+
+# remove debconf temporary files
+rm --preserve-root --one-file-system -rf "${DEBCONF_TMPDIR}"
+rmdir --ignore-fail-on-non-empty /tmp/container-tools 2>&1 || true
diff --git a/share/scripts/curl.d/0001-images b/share/scripts/curl.d/0001-images
new file mode 100755
index 0000000..b350634
--- /dev/null
+++ b/share/scripts/curl.d/0001-images
@@ -0,0 +1,85 @@
+#!/bin/sh
+
+# container-tools - Manage systemd-nspawn containers
+# Copyright (C) 2014-2016 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set -e
+
+CONFIG="/etc/container-tools/debconf"
+
+DEBCONF_NOWARNINGS="true"
+export DEBCONF_NOWARNINGS
+
+. /usr/share/debconf/confmodule
+
+curl 
+
+if [ -n "${PRESEED_FILE}" ]
+then
+	# user specified one or more preseed files through commandline option
+	db_set cnt-debconf/preseed-file "${PRESEED_FILE}"
+	db_fset cnt-debconf/preseed-file seen true
+elif ls "${CONFIG}"/*.cfg > /dev/null 2>&1
+then
+	# user has not specified preseed files through commandline option,
+	# showing debconf selection dialog for global preseed file.
+
+	FILES="$(cd ${CONFIG} && find . -type f -name '*.cfg' -printf '%P\n' | sort)"
+	PRESEED_FILES="$(for FILE in ${FILES}; do echo -n "${FILE}, "; done | sed -e 's|, $||')"
+
+	if [ -n "${PRESEED_FILES}" ]
+	then
+		db_subst cnt-debconf/preseed-files CHOICES "none, custom, , ${PRESEED_FILES}"
+
+		db_settitle cnt-debconf/title
+		db_input high cnt-debconf/preseed-files || true
+		db_go
+
+		db_get cnt-debconf/preseed-files
+		PRESEED_FILE="${RET}" # select
+
+		case "${PRESEED_FILE}" in
+			none|custom)
+				;;
+
+			*)
+				# user specified preseed file through debconf select
+				db_set cnt-debconf/preseed-file "${CONFIG}/${PRESEED_FILE}"
+				db_fset cnt-debconf/preseed-file seen true
+				;;
+		esac
+	fi
+fi
+
+case "${PRESEED_FILE}" in
+	none)
+		;;
+
+	*)
+		# ask user for a preseed file
+		db_settitle cnt-debconf/title
+		db_input high cnt-debconf/preseed-file || true
+		db_go
+
+		db_get cnt-debconf/preseed-file
+		PRESEED_FILE="${RET}" # string (w/ empty)
+
+		echo "PRESEED_FILE=\"${PRESEED_FILE}\"" >> "${DEBCONF_TMPDIR}/debconf.default"
+		export PRESEED_FILE
+		;;
+esac
+
+db_stop
diff --git a/share/scripts/curl.d/0001-images.templates b/share/scripts/curl.d/0001-images.templates
new file mode 100644
index 0000000..0e899b7
--- /dev/null
+++ b/share/scripts/curl.d/0001-images.templates
@@ -0,0 +1,9 @@
+Template: cnt-curl/title
+Type: title
+Description: container-tools
+
+Template: cnt-curl/images
+Type: select
+Default: none
+Choices: ${CHOICES}
+Description: Choose a container image.