[jhbuild] Allow not installing the desktop file

[Mathieu Bridon <mbridon src gnome org>]

commit b114bdd7fb616edf962f561a049155e823e7ffe6
Author: Mathieu Bridon <bochecha daitauha fr>
Date:   Fri Nov 11 16:03:02 2016 +0100

    Allow not installing the desktop file
    
    No more "Sundry" folder with only jhbuild inside!
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774271

 Makefile.am  |    2 ++
 configure.ac |    8 ++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index b47518d..bb2454c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,6 +11,7 @@ DTDS = \
        modulesets/moduleset.rnc \
        $(NULL)
 
+if GUI_ENABLED
 desktopdir = $(datadir)/applications
 desktop_DATA = jhbuild.desktop
 
@@ -20,6 +21,7 @@ jhbuild.desktop.in: jhbuild.desktop.in.in
 # Substitute variables in a Desktop Entry file.
 jhbuild.desktop: jhbuild.desktop.in
        $(AM_V_GEN) sed -e 's|@bindir[@]|$(bindir)|g' $< > $@
+endif
 
 EXTRA_DIST = $(PATCHES) $(MODULESETS) $(DTDS) \
        modulesets/moduleset.xsl \
diff --git a/configure.ac b/configure.ac
index 08078a0..78a76cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,6 +32,14 @@ AC_ARG_ENABLE(
        [enable_doc_installation=no])
 AM_CONDITIONAL([DOC_INSTALLATION_ENABLED],[test "x$enable_doc_installation" = "xyes"])
 
+# GUI
+AC_ARG_ENABLE(
+       gui,
+       AS_HELP_STRING([--enable-gui=@<:@no/yes@:>@], [install the graphical user interface (default: no)]),
+       [enable_gui=$enableval],
+       [enable_gui=no])
+AM_CONDITIONAL([GUI_ENABLED],[test "x$enable_gui" == "xyes"])
+
 YELP_HELP_INIT
 
 AC_CONFIG_FILES([