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#!/bin/sh
# Written by: John Ellson <ellson@research.att.com>
error() { echo "$0: $*" >&2; exit 1; }
editor="/usr/bin/vim"
if ! test -x "$editor"; then error "the \"$editor\" editor not found or not executable"; fi
default="noname.gv"
if test -z "$1"; then
f="$default"
if ! test -f "$f"; then
if ! test -w .; then error "directory `pwd` is not writable"; fi
cat >"$f" <<EOF
digraph G {
graph [layout=dot rankdir=LR]
// This is just an example for you to use as a template.
// Edit as you like. Whenever you save a legal graph
// the layout in the graphviz window will be updated.
vim [href="http://www.vim.org/"]
dot [href="http://www.graphviz.org/"]
vimdot [href="file:///usr/bin/vimdot"]
{vim dot} -> vimdot
}
EOF
fi
else
f="$1"
fi
if ! test -w "$f"; then error "$f is not writable"; fi
# dot -Txlib watches the file $f for changes using inotify()
# run it in an xterm window to handle any stderr
xterm -e dot -Txlib "$f" 2>/dev/null &
# open an editor on the file $f (could be any editor; gvim &'s itself)
exec $editor "$f"