From http://www.jwz.org/xscreensaver/xscreensaver-5.23.tar.gz

[xscreensaver] / OSX / installer.sh

diff --git a/OSX/installer.sh b/OSX/installer.sh
new file mode 100755 (executable)
index 0000000..44e7f9b
--- /dev/null
+++ b/OSX/installer.sh
@@ -0,0 +1,100 @@
+#!/bin/sh
+# XScreenSaver, Copyright © 2013 Jamie Zawinski <jwz@jwz.org>
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation.  No representations are made about the suitability of this
+# software for any purpose.  It is provided "as is" without express or 
+# implied warranty.
+#
+# The guts of the installer.  Copies the screen savers out of the adjacent
+# "Screen Savers" directory and into "/Library/Screen Savers/".  We do it
+# this way instead of just including the screen savers in the package
+# because that would double the size of the DMG.
+#
+# Created: 27-Jul-2013.
+
+#exec >/tmp/xscreensaver.log 2>&1
+#set -x
+
+REQUIRED_SPACE=140     # MB. Highly approximate.
+
+DEBUG=0
+
+if [ x"$USER" = xjwz ]; then
+  DEBUG=1
+fi
+
+echo "Destination: $DSTVOLUME" >&2
+
+if [ "$DEBUG" != 0 ]; then
+  DSTVOLUME=/tmp
+fi
+
+SRC=`dirname "$PACKAGE_PATH"`/"Screen Savers"
+DST1="$DSTVOLUME/Library/Screen Savers"
+DST2="$DSTVOLUME/Applications"
+PU="$DSTVOLUME/$HOME/Library/Screen Savers"
+
+function error() {
+  echo "Error: $@" >&2
+  (
+    osascript <<__EOF__
+      tell app "System Events" to display dialog "$@" buttons "Bummer" default button 1 with icon 0 with title "Installation Error"
+__EOF__
+  ) </dev/null >/dev/null 2>&1 &
+  exit 1
+}
+
+cd "$SRC" || error "The 'Screen Savers' folder does not exist.
+
+You can't copy the installer out of the Disk Image!"
+
+
+free=`df -k "$DSTVOLUME" |
+     tail -1 | head -1 | awk '{print $4}'`
+need=`echo $REQUIRED_SPACE \* 1024 | bc`
+if [ "$free" -lt "$need" ]; then
+ free=`echo $free / 1024 | bc`
+ error "Not enough disk space: $free MB available, $REQUIRED_SPACE MB required."
+fi
+
+
+mkdir -p "$DST1" || error "Unable to create directory $DST1/"
+mkdir -p "$DST2" || error "Unable to create directory $DST2/"
+
+# Install the savers in /System/Library/Screen Savers/
+#
+for f in *.saver ; do
+  DD="$DST1/$f"
+  echo "Installing $DD" >&2
+  rm -rf "$DD" || error "Unable to delete $DD"
+  cp -pr "$f" "$DST1/" || error "Unable to install $f in $DST1/"
+  xattr -r -d com.apple.quarantine "$DD"
+
+  # If this saver is also installed in the per-user directory,
+  # delete that copy so that we don't have conflicts.
+  #
+  if [ "$DEBUG" = 0 ]; then
+    rm -rf "$PU/$f"
+  fi
+done
+
+
+# Install the apps in /Applications/
+#
+for f in *.app ; do
+  DD="$DST2/$f"
+  echo "Installing $DD" >&2
+  rm -rf "$DD" || error "Unable to delete $DD"
+  cp -pr "$f" "$DST2/" || error "Unable to install $f in $DST2/"
+  xattr -r -d com.apple.quarantine "$DD"
+done
+
+# Launch System Preferences with the Screen Saver pane selected.
+#
+open /System/Library/PreferencePanes/DesktopScreenEffectsPref.prefPane &
+
+exit 0