[gnome-builder] build: add appstream-xml.m4

[Christian Hergert <chergert src gnome org>]

commit e81fb907f9aab9515e3ee0e1672fd85a59559772
Author: Christian Hergert <christian hergert me>
Date:   Wed Dec 31 22:19:02 2014 -0800

    build: add appstream-xml.m4

 build/autotools/m4/appstream-xml.m4 |   86 +++++++++++++++++++++++++++++++++++
 1 files changed, 86 insertions(+), 0 deletions(-)
---
diff --git a/build/autotools/m4/appstream-xml.m4 b/build/autotools/m4/appstream-xml.m4
new file mode 100644
index 0000000..1472802
--- /dev/null
+++ b/build/autotools/m4/appstream-xml.m4
@@ -0,0 +1,86 @@
+# appstream-xml.m4
+#
+# serial 6
+
+dnl APPSTREAM_XML
+dnl Installs and validates AppData XML files.
+dnl
+dnl Call APPSTREAM_XML in configure.ac to check for the appstream-util tool.
+dnl Add @APPSTREAM_XML_RULES@ to a Makefile.am to substitute the make rules. Add
+dnl .appdata.xml files to appstream_XML in Makefile.am and they will be validated
+dnl at make check time, if appstream-util is installed, as well as installed
+dnl to the correct location automatically. Add --enable-appstream-util to
+dnl DISTCHECK_CONFIGURE_FLAGS in Makefile.am to require valid AppData XML when
+dnl doing a distcheck.
+dnl
+dnl Adding files to appstream_XML does not distribute them automatically.
+
+AC_DEFUN([APPSTREAM_XML],
+[
+  m4_pattern_allow([AM_V_GEN])
+  AC_ARG_ENABLE([appstream-util],
+                [AS_HELP_STRING([--disable-appstream-util],
+                                [Disable validating AppData XML files during check phase])])
+
+  AS_IF([test "x$enable_appstream_validate" != "xno"],
+        [AC_PATH_PROG([APPSTREAM_UTIL], [appstream-util])
+         AS_IF([test "x$APPSTREAM_UTIL" = "x"],
+               [have_appstream_validate=no],
+               [have_appstream_validate=yes
+                AC_SUBST([APPSTREAM_UTIL])])],
+        [have_appstream_validate=no])
+
+  AS_IF([test "x$have_appstream_validate" != "xno"],
+        [appstream_validate=yes],
+        [appstream_validate=no
+         AS_IF([test "x$enable_appstream_validate" = "xyes"],
+               [AC_MSG_ERROR([AppData validation was requested but appstream-util was not found])])])
+
+  AC_SUBST([appstreamxmldir], [${datadir}/appdata])
+
+  APPSTREAM_XML_RULES='
+.PHONY : uninstall-appstream-xml install-appstream-xml clean-appstream-xml
+
+mostlyclean-am: clean-appstream-xml
+
+%.appdata.valid: %.appdata.xml
+       $(AM_V_GEN) if test -f "$<"; then d=; else d="$(srcdir)/"; fi; \
+               if test -n "$(APPSTREAM_UTIL)"; \
+                       then $(APPSTREAM_UTIL) --nonet validate $${d}$<; fi \
+               && touch [$]@
+
+check-am: $(appstream_XML:.appdata.xml=.appdata.valid)
+uninstall-am: uninstall-appstream-xml
+install-data-am: install-appstream-xml
+
+.SECONDARY: $(appstream_XML)
+
+install-appstream-xml: $(appstream_XML)
+       @$(NORMAL_INSTALL)
+       if test -n "$^"; then \
+               test -z "$(appstreamxmldir)" || $(MKDIR_P) "$(DESTDIR)$(appstreamxmldir)"; \
+               $(INSTALL_DATA) $^ "$(DESTDIR)$(appstreamxmldir)"; \
+       fi
+
+uninstall-appstream-xml:
+       @$(NORMAL_UNINSTALL)
+       @list='\''$(appstream_XML)'\''; test -n "$(appstreamxmldir)" || list=; \
+       files=`for p in $$list; do echo $$p; done | sed -e '\''s|^.*/||'\''`; \
+       test -n "$$files" || exit 0; \
+       echo " ( cd '\''$(DESTDIR)$(appstreamxmldir)'\'' && rm -f" $$files ")"; \
+       cd "$(DESTDIR)$(appstreamxmldir)" && rm -f $$files
+
+clean-appstream-xml:
+       rm -f $(appstream_XML:.appdata.xml=.appdata.valid)
+'
+  _APPSTREAM_XML_SUBST(APPSTREAM_XML_RULES)
+])
+
+dnl _APPSTREAM_XML_SUBST(VARIABLE)
+dnl Abstract macro to do either _AM_SUBST_NOTMAKE or AC_SUBST
+AC_DEFUN([_APPSTREAM_XML_SUBST],
+[
+AC_SUBST([$1])
+m4_ifdef([_AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE([$1])])
+]
+)