fix tar use gzip

sync.sh

@@ -2,45 +2,42 @@
 # vi: et sw=4 ts=4:
 # hsv2
 
-# for macos
-realpath() (
-  OURPWD=$PWD
-  cd "$(dirname "$1")"
-  LINK=$(readlink "$(basename "$1")")
-  while [ "$LINK" ]; do
-    cd "$(dirname "$LINK")"
-    LINK=$(readlink "$(basename "$1")")
-  done
-  REALPATH="$PWD/$(basename "$1")"
-  cd "$OURPWD"
-  echo "$REALPATH"
-)
+LOCAL_DIR="${2:="$HOME/goinfre/"}"
+REMOTE_DIR="${3:="$HOME/sgoinfre/goinfre/"}"
+ARCHIVE="${4:="$HOME/sgoinfre/goinfre.tar.gz"}"
+MARKER=".sync.sh.marker"
+LOCAL_MARKER="$LOCAL_DIR/$MARKER"
+REMOTE_MARKER="$REMOTE_DIR/$MARKER"
 
-LOCAL_DIR="${2:="$HOME/goinfre"}"
-REMOTE_DIR="${3:="$HOME/sgoinfre/goinfre"}"
-ARCHIVE="${4:="$HOME/sgoinfre/goinfre.tar.xz"}"
-
-if [[ -d $(realpath "$LOCAL_DIR") && -d $(realpath "$REMOTE_DIR") ]]
+if [[ ! ( -e "$LOCAL_DIR" && -e "$REMOTE_DIR") ]]
 then
     echo "ABORTING: local or remote directory missing"
     exit 1
 fi
 
 
-if [[ $1 == "in" || -z $1 ]]
+if [[ ($1 == "in" || -z $1) && (! -e "$LOCAL_MARKER" || "$LOCAL_MARKER" -ot "$REMOTE_MARKER") ]]
 then
     echo "sync in: $LOCAL_DIR"
     if [[ -f "$ARCHIVE" ]]
     then
-        tar xJf "$ARCHIVE" -C "$LOCAL_DIR"
+        tar xzf "$ARCHIVE" -C "$LOCAL_DIR"
     fi
     rsync -a --progress "$REMOTE_DIR/" "$LOCAL_DIR"
-elif [[ $1 == "out" ]]
+elif [[ $1 == "out" && (! -e "$REMOTE_MARKER" || "$REMOTE_MARKER" -ot "$LOCAL_DIR") ]]
 then
     echo "sync out: $REMOTE_DIR"
-    rsync -a --progress "$LOCAL_DIR/" "$REMOTE_DIR"
-    tar cJvf "$ARCHIVE" -C "$REMOTE_DIR" .
-else
+    echo "cleaning brew"
+    brew autoremove
+    brew cleanup --prune=all
+	tar czf "$ARCHIVE.tmp" -C "$LOCAL_DIR" . || (echo "FATAL ERROR. EXITING"; exit 1)
+	mv -v "$ARCHIVE.tmp" "$ARCHIVE"
+    rsync -a --progress --delete-delay "$LOCAL_DIR/" "$REMOTE_DIR"
+    touch "$REMOTE_MARKER"
+elif [[ $1 != "in" && $1 != "out" ]]
+then
     echo -e "parameter invalid\nsyntax: $0 {in|out} [ local [ remote ] ]"
     exit 1
 fi
+
+echo "Up to date"