From c1212ba4918e64ea358ad5df24d2c53c99f9368e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@open-infrastructure.net>
Date: Sat, 22 Jul 2017 22:16:20 +0200
Subject: Adding automatic compression detection for downloads in in curl
 container create directory.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>
---
 share/scripts/curl | 32 ++++++++++++++++++++++++--------
 1 file changed, 24 insertions(+), 8 deletions(-)

diff --git a/share/scripts/curl b/share/scripts/curl
index 62ce9be..4a719f0 100755
--- a/share/scripts/curl
+++ b/share/scripts/curl
@@ -142,16 +142,25 @@ then
 	exit 1
 fi
 
+COMPRESSIONS=""
+
 if [ -x /usr/bin/lzip ]
 then
-	COMPRESSION="lz"
-elif [ -x /usr/bin/xz ]
+	COMPRESSIONS="${COMPRESSIONS} lz"
+fi
+
+if [ -x /usr/bin/xz ]
+then
+	COMPRESSIONS="${COMPRESSIONS} xz"
+fi
+
+if [ -x /bin/gzip ]
 then
-	COMPRESSION="xz"
-elif [ -x /bin/gzip ]
+	COMPRESSIONS="${COMPRESSIONS} gz"
+fi
+
+if [ -z "${COMPRESSIONS}" ]
 then
-	COMPRESSION="gz"
-else
 	echo "'${NAME}': no supported compressor available (lz, xz, gz)."
 	exit 1
 fi
@@ -252,14 +261,21 @@ then
 		# Read-in configuration from debconf
 		. "${DEBCONF_TMPDIR}/debconf.default"
 
-		SYSTEM="${SYSTEM}.${COMPRESSION}"
-
 		# 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
 	fi
 fi
 
+for COMPRESSION in ${COMPRESSIONS}
+do
+	if curl --fail --head --output /dev/null --silent "${SERVER}/${SYSTEM}.${COMPRESSION}"
+	then
+		SYSTEM="${SYSTEM}.${COMPRESSION}"
+		break
+	fi
+done
+
 # Downloading container files
 mkdir -p "${CACHE}"
 
-- 
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