Add a simple profile.d snippet for XDG_DATA_DIRS

https://github.com/alexlarsson/xdg-app/issues/74

.gitignore

@@ -29,6 +29,7 @@ xdg-app-helper
 xdg-app-session-helper
 doc/*.1
 *~
+profile/xdg-app.sh
 xdg-app-dbus.[ch]
 xdg-app-systemd-dbus.[ch]
 xdg-app-resources.[ch]

Makefile.am

@@ -146,3 +146,11 @@ endif
 completiondir = $(datadir)/bash-completion/completions
 completion_DATA = completion/xdg-app
 EXTRA_DIST += $(completion_DATA)
+
+profiledir = $(sysconfdir)/profile.d
+profile_DATA = profile/xdg-app.sh
+EXTRA_DIST += profile/xdg-app.sh.in
+
+profile/xdg-app.sh: profile/xdg-app.sh.in
+	$(AM_V_GEN) $(SED) -e "s|\@localstatedir\@|$(localstatedir)|" \
+		-e "s|\@sysconfdir\@|$(sysconfdir)|" $< > $@

profile/xdg-app.sh.in

@@ -0,0 +1,4 @@
+# @sysconfdir@/profile.d/xdg-app.sh - set XDG_DATA_DIRS
+
+XDG_DATA_DIRS="$HOME/.local/share/xdg-app/exports/share:@localstatedir@/xdg-app/exports/share/:/usr/share"
+export XDG_DATA_DIRS