[Gnash-dev] proposed algorithm for snapshot installs

[Russ Nelson]

To make it as easy as possible, we want snapshots to be easy and safe
to install and uninstall.  rsavoye has an install-gnash.sh, but I'm
uncomfortable about rm'ing existing stuff (very small risk of very bad
consequences: "I installed gnash, and it deleted my $WHATEVER!")  I
propose this algorithm:

Look for /usr/share/gnash/FILES
If it exists, then a snapshot has already been installed.
    create a /tmp/gnash-old.tar from the files named in /usr/share/gnash/FILES
    rm the files and empty subdirectories
Look in the PATH for gnash.
If it's found, crap out:
    print "Please uninstall the gnash you already have"
    exit
Check for existing files in our tarball.
    print "We need to write to these files, but they already exist:"
    (list the files)
tar tf gnash-DATE.tar.gz >/usr/share/gnash/FILES
tar xpCf / gnash-DATE.tar.gz

Make sure they have gstreamer installed:
if they have /etc/apt, "apt-get install gstreamer0.10-ffmpeg"
if they have /etc/rpm, "yum install gstreamer0.10-ffmpeg"
if not, suggest that they install gstreamer-ffmpeg.

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