From 5c43eb66ca5f0ce179805737418aa301baf96fb5 Mon Sep 17 00:00:00 2001
From: David Seifert <soap@gentoo.org>
Date: Sun, 15 May 2022 00:50:04 +0200
Subject: [PATCH] Add option for disabling/customizing of demos

* Many distros have different directories for where to
  install example files to. Gentoo installs them under
  `$(docdir)/examples`. With `--without-demos`, we can suppress
  installation of the demos altogether.
---
 configure.ac                                  | 12 ++++++++
 tclpkg/gdtclft/demo/Makefile.am               |  4 +--
 tclpkg/gv/demo/Makefile.am                    | 28 ++++++++++---------
 tclpkg/tcldot/demo/Makefile.am                |  4 +--
 tclpkg/tclpathplan/demo/Makefile.am           |  4 +--
 .../demo/pathplan_data/Makefile.am            |  4 ++-
 tclpkg/tkspline/demo/Makefile.am              |  4 +--
 7 files changed, 38 insertions(+), 22 deletions(-)

diff --git a/configure.ac b/configure.ac
index d76d918cd..e9a994402 100644
--- a/configure.ac
+++ b/configure.ac
@@ -291,6 +291,18 @@ AS_IF([test "x$enable_man_pdfs" != "xno"], [
 ])
 AM_CONDITIONAL([ENABLE_MAN_PDFS], [test "x$enable_man_pdfs" != "xno" && test -n "$GROFF" && test -n "$PS2PDF"])
 
+# allow disabling of demos installation
+AC_ARG_WITH([demos],
+  [AS_HELP_STRING([--with-demos=DIR], [Install demos (default: $(pkgdatadir)/demo)])])
+
+demodir='$(pkgdatadir)/demo'
+AS_IF([test "$with_demos" != "xyes" && test -n "$with_demos"], [
+  dnl user provided --with-demos=/my/demo/dir
+  demodir="$with_demos"
+])
+AM_CONDITIONAL([INSTALL_DEMOS], [test "x$with_demos" != "xno"])
+AC_SUBST([demodir])
+
 PKG_INSTALLDIR
 PKG_PROG_PKG_CONFIG
 
diff --git a/tclpkg/gdtclft/demo/Makefile.am b/tclpkg/gdtclft/demo/Makefile.am
index 96a032cf7..64f24c75f 100644
--- a/tclpkg/gdtclft/demo/Makefile.am
+++ b/tclpkg/gdtclft/demo/Makefile.am
@@ -1,8 +1,8 @@
 ## Process this file with automake to produce Makefile.in
 
-demodir = $(pkgdatadir)/demo
-
+if INSTALL_DEMOS
 if WITH_TCL
 dist_demo_SCRIPTS = entities.tcl
 dist_demo_DATA = entities.tcl.README entities.html
 endif
+endif
diff --git a/tclpkg/gv/demo/Makefile.am b/tclpkg/gv/demo/Makefile.am
index d33e74af4..a6ab30805 100644
--- a/tclpkg/gv/demo/Makefile.am
+++ b/tclpkg/gv/demo/Makefile.am
@@ -1,19 +1,20 @@
 ## Process this file with automake to produce Makefile.in
 
-demosharpdir = $(pkgdatadir)/demo
-demoguiledir = $(pkgdatadir)/demo
-demoiodir = $(pkgdatadir)/demo
-demojavadir = $(pkgdatadir)/demo
-demoluadir = $(pkgdatadir)/demo
-demoocamldir = $(pkgdatadir)/demo
-demoperldir = $(pkgdatadir)/demo
-demophpdir = $(pkgdatadir)/demo
-demopythondir = $(pkgdatadir)/demo
-demopython3dir = $(pkgdatadir)/demo
-demoRdir = $(pkgdatadir)/demo
-demorubydir = $(pkgdatadir)/demo
-demotcldir = $(pkgdatadir)/demo
+demosharpdir = $(demodir)
+demoguiledir = $(demodir)
+demoiodir = $(demodir)
+demojavadir = $(demodir)
+demoluadir = $(demodir)
+demoocamldir = $(demodir)
+demoperldir = $(demodir)
+demophpdir = $(demodir)
+demopythondir = $(demodir)
+demopython3dir = $(demodir)
+demoRdir = $(demodir)
+demorubydir = $(demodir)
+demotcldir = $(demodir)
 
+if INSTALL_DEMOS
 if WITH_SHARP
 demosharp_SCRIPTS =
 endif
@@ -53,5 +54,6 @@ endif
 if WITH_TCL
 demotcl_SCRIPTS = modgraph.tcl
 endif
+endif
 
 EXTRA_DIST = modgraph.*
diff --git a/tclpkg/tcldot/demo/Makefile.am b/tclpkg/tcldot/demo/Makefile.am
index a03f3a0d2..a358ab465 100644
--- a/tclpkg/tcldot/demo/Makefile.am
+++ b/tclpkg/tcldot/demo/Makefile.am
@@ -1,10 +1,10 @@
 ## Process this file with automake to produce Makefile.in
 
-demodir = $(pkgdatadir)/demo
-
+if INSTALL_DEMOS
 if WITH_TCL
 demo_SCRIPTS = doted.tcl gcat.tcl
 demo_DATA = doted.tcl.README gcat.tcl.README
 endif
+endif
 
 EXTRA_DIST = doted.tcl gcat.tcl doted.tcl.README gcat.tcl.README
diff --git a/tclpkg/tclpathplan/demo/Makefile.am b/tclpkg/tclpathplan/demo/Makefile.am
index cd772cf20..a8737d1b5 100644
--- a/tclpkg/tclpathplan/demo/Makefile.am
+++ b/tclpkg/tclpathplan/demo/Makefile.am
@@ -2,11 +2,11 @@
 
 SUBDIRS = pathplan_data
 
-demodir = $(pkgdatadir)/demo
-
+if INSTALL_DEMOS
 if WITH_TCL
 demo_SCRIPTS = pathplan.tcl
 demo_DATA = pathplan.tcl.README
 endif
+endif
 
 EXTRA_DIST = pathplan.tcl pathplan.tcl.README
diff --git a/tclpkg/tclpathplan/demo/pathplan_data/Makefile.am b/tclpkg/tclpathplan/demo/pathplan_data/Makefile.am
index e79a1ce17..f4e79eafc 100644
--- a/tclpkg/tclpathplan/demo/pathplan_data/Makefile.am
+++ b/tclpkg/tclpathplan/demo/pathplan_data/Makefile.am
@@ -1,8 +1,10 @@
 ## Process this file with automake to produce Makefile.in
 
-pathplanexampledir = $(pkgdatadir)/demo/pathplan_data
+pathplanexampledir = $(demodir)/pathplan_data
 
+if INSTALL_DEMOS
 if WITH_TCL
 dist_pathplanexample_DATA = boxes.dat dpd.dat funny.dat maze.dat nested.dat northo.dat \
 	obs.dat other.dat paths.dat rotor.dat u.dat unknown.dat
 endif
+endif
diff --git a/tclpkg/tkspline/demo/Makefile.am b/tclpkg/tkspline/demo/Makefile.am
index a0e3f05b8..b0abd4f23 100644
--- a/tclpkg/tkspline/demo/Makefile.am
+++ b/tclpkg/tkspline/demo/Makefile.am
@@ -1,10 +1,10 @@
 ## Process this file with automake to produce Makefile.in
 
-demodir = $(pkgdatadir)/demo
-
+if INSTALL_DEMOS
 if WITH_TK
 demo_SCRIPTS = spline.tcl
 demo_DATA = spline.tcl.README
 endif
+endif
 
 EXTRA_DIST = spline.tcl spline.tcl.README
-- 
2.40.0