feat: tool and scripts to interactively explore webgraph

Add script to extract top-10k vertices by indegree and outdegree.

src/script/webgraph_ranking/process_webgraph_degrees.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -eo pipefail
+
+NAME="$1"
+TYPE="${2:-domain}"
+
+if [ -z "$NAME" ]; then
+    echo "Usage: $(basename $0) <graph-name> [<type>]"
+    echo -e "\tgraph-name\tbase name of the webgraph (without the file suffix .graph)"
+    echo -e "\ttype\ttype (level) of the graph aggregation: domain (default) or host"
+    exit 1
+fi
+
+WG=$(dirname $0)/run_webgraph.sh
+
+if [ -e $NAME.outdegrees ] && [ -e $NAME.indegrees ]; then
+    : # out/indegrees already done
+else
+    $WG it.unimi.dsi.webgraph.Stats --save-degrees "$NAME"
+fi
+
+
+if [ "$TYPE" == "domain" ]; then
+    zcat $NAME-vertices.txt.gz
+else
+    zcat vertices/*.txt.gz
+fi \
+    | cut -f2- \
+    | paste $NAME.outdegrees $NAME.indegrees - \
+    | gzip >$NAME-outdegrees-indegrees.txt.gz
+
+
+HEADER="outdegree\tindegree\tname"
+if [ "$TYPE" == "domain" ]; then
+    HEADER="outdegree\tindegree\tname\tnumsubdomains"
+fi
+
+(echo -e "$HEADER";
+ set +o pipefail;
+ zcat $NAME-outdegrees-indegrees.txt.gz \
+     | perl -aF'\t' -lne 'print if $F[0] > 1000' \
+     | sort -k1,1nr \
+     | head -10000) \
+    | gzip >$NAME-outdegrees-indegrees-topout.txt.gz
+
+(echo -e "$HEADER";
+ set +o pipefail;
+ zcat $NAME-outdegrees-indegrees.txt.gz \
+     | perl -aF'\t' -lne 'print if $F[1] > 1000' \
+     | sort -k2,2nr \
+     | head -10000) \
+    | gzip >$NAME-outdegrees-indegrees-topin.txt.gz
+