tools/zep_dispatch: run dispatch with custom topology

[RocioRojas]

Contribution description

With this patch, any custom topology will remain unaltered after run command execution. This also allows random topology generation.

Testing procedure

Create a new custom file topology [filenew.topo] in the folder /tools/zep_dispatch. Then, run:

make run TOPOLOGY= filenew.topo

Then check that filenew.topo remain unaltered.

For random generation, check:

make run

Issues/PRs references

Fixes #18169

[benpicco]

Thank you for the fix!

[benpicco]

Ah ok, now I see what's the problem: You want the .svg but with a custom topology, but topogen.sh will always create both the topology file and the .svg.

Then how about moving the 'only create file if it doesn't exist' logic to topogen.sh

diff --git a/dist/tools/zep_dispatch/topogen.sh b/dist/tools/zep_dispatch/topogen.sh
index db19059282..6b2e6f2b92 100755
--- a/dist/tools/zep_dispatch/topogen.sh
+++ b/dist/tools/zep_dispatch/topogen.sh
@@ -22,9 +22,10 @@ RANGE=30	# base node radio range
 VARIANCE=15	# random offset to radio range
 NUM=10		# number of nodes
 
-echo "writing to $FILE"
-
-./bin/topogen -w $WIDTH -h $HEIGHT -r $RANGE -v $VARIANCE -n $NUM > "$FILE"
+if [ ! -f "$FILE" ]; then
+	echo "writing to $FILE"
+	./bin/topogen -w $WIDTH -h $HEIGHT -r $RANGE -v $VARIANCE -n $NUM > "$FILE"
+fi
 
 if ! command -v gnuplot > /dev/null; then
     printf "${CWARN}%s${CRESET}\n" "gnuplot not installed"

and drop the Makefile changes.

[benpicco]

You can now also get rid of toposvg.sh as it's no longer used.

[RocioRojas]

It's done. thanks! @benpicco

[benpicco]

Thank you, please squash!
(You can do git rebase -i HEAD~4, then select fixup for all but the first commit)

[RocioRojas]

Done! @benpicco

[benpicco]

Thank you for the PR!