dump filesystem and diff it

docker-diff

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# https://github.com/moul/docker-diff
 
 #
 # Compare the contents of two Docker images.
@@ -16,27 +17,30 @@ then
  exit 99
 fi
 
-TEST_IMAGE='busybox'
-if [ $(docker images -q ${TEST_IMAGE} | wc -l) -lt 1 ]
-then
- docker pull ${TEST_IMAGE}
-fi
-
 CONTAINER_A_ID=$(docker create $1 /bin/sh)
 CONTAINER_B_ID=$(docker create $2 /bin/sh)
 
-if [[ ${IGNORE_FILESIZE} == 1 ]]
+tmpdir=$(mktemp -d)
+
+A=$1
+B=$2
+
+set -e
+docker export "${CONTAINER_A_ID}" > ${tmpdir}/A.tar
+docker export "${CONTAINER_B_ID}" > ${tmpdir}/B.tar
+mkdir -p ${tmpdir}/${A} && tar -xf ${tmpdir}/A.tar -C ${tmpdir}/${A} --exclude='./etc/mtab' --exclude='./proc' --exclude='./dev'
+mkdir -p ${tmpdir}/${B} && tar -xf ${tmpdir}/B.tar -C ${tmpdir}/${B} --exclude='./etc/mtab' --exclude='./proc' --exclude='./dev'
+diff -arq ${tmpdir}/${A} ${tmpdir}/${B} | grep -v "No such file or directory" | grep -v "is a character special file" | grep -v "is a block special file" | tee >(wc -l > ${tmpdir}/difflinecount)
+set +e
+
+code=1
+if [[ $(echo `cat ${tmpdir}/difflinecount`) == "0" ]]
 then
- AWK_STATEMENT='{printf "%-10s %-100s\n",$1,$6}'
-else
- AWK_STATEMENT='{printf "%-10s %-10s %-100s\n",$1,$3,$6}'
+ code=0
 fi
 
-diff \
- <(docker export ${CONTAINER_A_ID} | docker run -i --rm ${TEST_IMAGE} tar tvf - | awk "${AWK_STATEMENT}") \
- <(docker export ${CONTAINER_B_ID} | docker run -i --rm ${TEST_IMAGE} tar tvf - | awk "${AWK_STATEMENT}")
-code=$?
+rm -rf ${tmpdir}
 
-docker rm -fv ${CONTAINER_A_ID} ${CONTAINER_B_ID} > /dev/null
+docker rm -fv "${CONTAINER_A_ID}" "${CONTAINER_B_ID}" > /dev/null
 
 exit $code