From b2d0615481db11304d89d582655a908d783216a9 Mon Sep 17 00:00:00 2001
From: Christian Feld <c.feld@fz-juelich.de>
Date: Sat, 6 Nov 2021 14:54:16 +0100
Subject: [PATCH] Customize distribution and installation

doxygen creates documentation at make dist, copies it to tarball and
extracts it at make install. Thus user doens't need to have (specific
version) of doxygen.
---
 Makefile.am     | 25 +++++++++++++++++++++++++
 configure.ac    |  4 ++++
 doc/doxyfile.in | 15 +++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100644 doc/doxyfile.in

diff --git a/Makefile.am b/Makefile.am
index be48b7f..24c9db5 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -26,3 +26,28 @@ libfoo_la_SOURCES = src/foo.c
 include_HEADERS = src/foo.h
 
 EXTRA_DIST += doc/documentation.md
+
+dist-hook: doxygen-2-dist
+if HAVE_DOXYGEN
+doxygen-2-dist:
+	$(DOXYGEN) doc/doxyfile
+	tar czf doxygen.tar.gz doxygen/
+	cp doxygen.tar.gz $(distdir)/doc
+	rm -rf doxygen doxygen.tar.gz
+else !HAVE_DOXYGEN
+doxygen-2-dist:
+endif !HAVE_DOXYGEN
+
+install-data-hook: doxygen-install
+doxygen-install:
+	if test -e $(srcdir)/doc/doxygen.tar.gz; then \
+            $(MKDIR_P) $(DESTDIR)$(docdir); \
+            $(INSTALL_DATA) $(srcdir)/doc/doxygen.tar.gz $(DESTDIR)$(docdir)/; \
+            cd $(DESTDIR)$(docdir); \
+            tar xzf doxygen.tar.gz; \
+            rm -f doxygen.tar.gz; \
+        fi
+
+uninstall-hook: doxygen-uninstall
+doxygen-uninstall:
+	rm -rf $(DESTDIR)$(docdir)/doxygen
diff --git a/configure.ac b/configure.ac
index a7f82ae..9bd0f83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,10 @@ LT_INIT
 
 LIBPAPI
 
+AC_CHECK_PROG([DOXYGEN], [doxygen], [`which doxygen`])
+AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
+AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([doc/doxyfile])])
+
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
diff --git a/doc/doxyfile.in b/doc/doxyfile.in
new file mode 100644
index 0000000..d032f51
--- /dev/null
+++ b/doc/doxyfile.in
@@ -0,0 +1,15 @@
+# @configure_input@
+
+# Doxyfile 1.8.10
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project.
+# ...
+
+PROJECT_NAME           = "@PACKAGE@"
+PROJECT_NUMBER         = @PACKAGE_VERSION@
+INPUT                  = @abs_top_srcdir@
+OUTPUT_DIRECTORY       = doxygen
+QUIET                  = YES
+
+# ...
-- 
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