TT#48647 Add ability to use the specified file from current dir

It is useful to build sipwise image based on some custom grml image
which is absent on deb.sipwise.com.
Check if the specified file is already here in dir so do not need to
download it.

Change-Id: Ief24f7c42a1e5abce5af7c0aac93a5399b8294a1

build_iso.sh

@@ -35,23 +35,36 @@ elif [ -z "${DIST}" ]; then
   usage
 fi
 
-if [ "${GRML_ISO}" != "" ]; then
-  if [[ "${GRML_ISO}" =~ ^devel/.*\.iso$ ]]; then
-    GRML_URL+="devel/"
-    GRML_HASH_URL+="devel/"
-  fi
+if [[ -n "${GRML_ISO}" ]]; then
   GRML_ISO=$(basename "${GRML_ISO}")
 else
   usage
 fi
 
-echo "*** Building ${MR} ISO ***"
+
+SCRIPT="$(readlink -f "$0")"
+SCRIPTPATH="$(dirname "${SCRIPT}")"
+pushd "${SCRIPTPATH}" &>/dev/null
 
 echo "*** Retrieving Grml ISO [${GRML_ISO}] ***"
-# shellcheck disable=SC2086
-wget ${WGET_OPT} -O "${GRML_ISO}" "${GRML_URL}${GRML_ISO}"
-# shellcheck disable=SC2086
-wget ${WGET_OPT} -O "${GRML_ISO}.sha1" "${GRML_HASH_URL}${GRML_ISO}.sha1"
+if [[ -f "${SCRIPTPATH}/${GRML_ISO}" ]]; then
+  echo "*** Grml ISO [${GRML_ISO}] is already here, checking sha1 file ***"
+  if [[ -f "${SCRIPTPATH}/${GRML_ISO}.sha1" ]]; then
+    echo "*** Grml ISO sha1 [${GRML_ISO}.sha1] is already here ***"
+  else
+    echo "*** Downloading Grml ISO sha1 [${GRML_ISO}.sha1] ***"
+    # shellcheck disable=SC2086
+    wget ${WGET_OPT} -O "${GRML_ISO}.sha1" "${GRML_HASH_URL}${GRML_ISO}.sha1"
+  fi
+else
+  echo "*** Downloading Grml ISO and sha1 files [${GRML_ISO}] ***"
+  # shellcheck disable=SC2086
+  wget ${WGET_OPT} -O "${GRML_ISO}" "${GRML_URL}${GRML_ISO}"
+  # shellcheck disable=SC2086
+  wget ${WGET_OPT} -O "${GRML_ISO}.sha1" "${GRML_HASH_URL}${GRML_ISO}.sha1"
+fi
+
+echo "*** Building ${MR} ISO ***"
 
 if grep -q "${GRML_ISO}" "${GRML_ISO}.sha1" ; then
   check_sha1 "${GRML_ISO}"
@@ -89,3 +102,5 @@ md5sum  "${SIPWISE_ISO}" > "${SIPWISE_ISO}.md5"
 mkdir -p artifacts
 echo "*** Moving ${SIPWISE_ISO} ${SIPWISE_ISO}.sha1 ${SIPWISE_ISO}.md5 to artifacts/ ***"
 mv "${SIPWISE_ISO}" "${SIPWISE_ISO}.sha1" "${SIPWISE_ISO}.md5" artifacts/
+
+popd &>/dev/null