Refactor tws_ scripts and change to ZST archive format

1 files changed, 31 insertions, 41 deletions

diff --git a/tws_check_update b/tws_check_update
index bc180b82015e..b23decae97df 100755
--- a/tws_check_update
+++ b/tws_check_update
@@ -1,53 +1,43 @@
 #!/bin/bash
 
+# Put latest installer in $HOME/.tws_scripts with a text file showing version
 # Exit status codes:
-#   0 =  Existing version is latest
-#   1 =  New version of TWS available
-#   2 =  Error
+#   0 = success (ls -l $HOME/.tws_scripts for accurate latest version)
+#   1 = failure (refer to console output)
 
 DOWNLOAD_DIR="$HOME/.tws_scripts"
 FILE_MIRROR="tws-latest-standalone-linux-x64.sh"
 URL_MIRROR="https://download2.interactivebrokers.com/installers/tws/latest-standalone"
 FILE_CUR="${DOWNLOAD_DIR}/${FILE_MIRROR}"
 
-get_perm_file_name()
-{
-	local ver;
-	local dst;
-	ver="$(tws_get_version "$1" || echo unknown)"
-	dst="$(echo "$1" | sed -e "s/\(.*\)\.\(.*\)/\1-${ver}.\2/g" -e 's/_latest//g')"
-	echo "${dst}"
-}
-
-mkdir -p $DOWNLOAD_DIR
-
-TDIR="$(mktemp -d -t twsdl.XXXX)" || exit 2
-trap "rm -rf ${TDIR}" exit
-cd "${TDIR}" || exit 2
-
-# create fake sparse file for wget because wget -K is broken and -O file
-# conflicts with -N
-if test -f "${FILE_CUR}" ; then
-	truncate -r "${FILE_CUR}" "${FILE_MIRROR}"
-	touch -r "${FILE_CUR}" "${FILE_MIRROR}"
+set -euo pipefail
+
+MD5_OLD='none'
+if test -e "${FILE_CUR}"; then
+  MD5_OLD=$(md5sum ${FILE_CUR} | cut -c 1-32)
+fi
+echo "Latest version before wget has md5sum $MD5_OLD"
+
+wget --verbose -N -P "${DOWNLOAD_DIR}" "${URL_MIRROR}/${FILE_MIRROR}"
+
+MD5_NEW=$(md5sum ${FILE_CUR} | cut -c 1-32)
+echo "Latest version after wget has md5sum $MD5_NEW"
+
+if [ "$MD5_OLD" == "$MD5_NEW" ]; then
+  echo "File has not changed"
+  exit 0
 fi
 
-if wget --no-verbose -U x -N -P "${TDIR}" "${URL_MIRROR}/${FILE_MIRROR}" ;then
-    if test "${FILE_MIRROR}" -nt "${FILE_CUR}" ; then
-	DST="$(get_perm_file_name "${FILE_MIRROR}")"
-        if [[ $DST == *"unknown"* ]]; then
-            echo "Error obtaining version from $FILE_MIRROR"
-            exit 2
-        fi
-        mv "${FILE_MIRROR}" "${DOWNLOAD_DIR}/${DST}"
-	ln -sf "${DST}" "${FILE_CUR}"
-	echo "TWS $(echo "${DST}" |sed 's/.*-\(.*\)\..*/\1/g') fetched" 1>&2
-	exit 1
-    else
-        echo "TWS $(readlink "${DOWNLOAD_DIR}/${FILE_MIRROR}" |sed 's/.*-\(.*\)\..*/\1/g') is latest" 1>&2
-	exit 0
-    fi
-else
-    echo "TWS update failed" 1>&2
-    exit 2
+echo "File has been updated; extracting version number by executing Java"
+DST="$(./tws_get_version "${FILE_CUR}" || echo unknown)"
+echo "Version is $DST"
+
+if [[ $DST == *"unknown"* ]]; then
+  echo "Error obtaining version by executing $FILE_MIRROR"
+  exit 2
 fi
+
+echo -n $DST > ${DOWNLOAD_DIR}/version.txt
+
+cat ${DOWNLOAD_DIR}/version.txt
+exit 0