# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1619913165 -7200
# Node ID 241cef280252c5a263cfa313b00637bff8c39a21
# Parent  e44c8db8ee3f3f43152e7f31bc8616d90352ca51
Tidied, introducing functions, and adding node definitions and colouring.

diff -r e44c8db8ee3f -r 241cef280252 docs/tools/depgraph
--- a/docs/tools/depgraph	Sat May 01 23:51:50 2021 +0200
+++ b/docs/tools/depgraph	Sun May 02 01:52:45 2021 +0200
@@ -20,6 +20,39 @@
     fi
 }
 
+# Filter library headers.
+
+filter_libraries()
+{
+    grep -v '<l4\|<systypes\|<std\|<list>\|<map>\|<mutex>\|<condition_variable>'
+}
+
+# Select basenames in search result filenames.
+
+select_basenames()
+{
+    sed 's/[^:]*\/\([^:]*\)/\1/'
+}
+
+# Colour nodes by source category.
+
+colour_sources()
+{
+      sed '/files/s/$/ [style=filled,fillcolor="#ffdddd"]/' \
+    | sed '/pipes/s/$/ [style=filled,fillcolor="#ddddff"]/' \
+    | sed '/mapping/s/$/ [style=filled,fillcolor="#ddffdd"]/' \
+    | sed '/pages/s/$/ [style=filled,fillcolor="#ddffff"]/' \
+    | sed '/libmem/s/$/ [style=filled,fillcolor="#dddddd"]/'
+}
+
+# Remove this directory as prefix.
+
+remove_prefix()
+{
+    QUOTED=`echo "$PKGDIR" | sed 's/\//\\\\\//g'`
+    sed "s/^${QUOTED}\///"
+}
+
 
 
 # Main program.
@@ -44,6 +77,18 @@
 
 EOF
 
+# Generate nodes using source filenames to permit categorisation-based node
+# colouring.
+
+  find $SOURCES -maxdepth 4 -name '*.cc' \
+| filter_interfaces \
+| remove_prefix \
+| colour_sources \
+| select_basenames \
+| sed 's/\.cc//' \
+| sed 's/$/;/' \
+>> "$DOTFILE"
+
 # Generate header file relationships.
 # Find header files.
 # Obtain include statements.
@@ -55,8 +100,8 @@
   find $SOURCES -maxdepth 4 -name '*.h' \
 | xargs -I{} grep -H include '{}' \
 | filter_interfaces \
-| grep -v '<l4\|<systypes\|<std\|<list>\|<map>\|<mutex>\|<condition_variable>' \
-| sed 's/[^:]*\/\([^:]*\)/\1/' \
+| filter_libraries \
+| select_basenames \
 | sed 's/<.*\///g;s/<//g;s/>//g;s/"//g;s/\.h//g;s/:#include / -> /;s/^/  /;s/$/;/' \
 >> "$DOTFILE"