1 files changed, 59 insertions, 1 deletions
diff --git a/data/epiphany.m4 b/data/epiphany.m4
index e880c22b6..890fc3866 100644
--- a/data/epiphany.m4
+++ b/data/epiphany.m4
@@ -20,9 +20,67 @@
 ## configuration script generated by Autoconf, you may include it under
 ## the same distribution terms that you use for the rest of that program.
 
-AC_DEFUN([AC_EPIPHANY_EXTENSION],
+
+# Usage:
+#   EPIPHANY_EXTENSION_INIT(ephy-api-version, [minimum-ephy-version])
+#
+# Side effects:
+#   EPIPHANY_EXTENSIONS_DIR is set to the directory to install extensions in
+#   EPIPHANY_EXTENSION_RULE can be used to translate .ephy-extension files
+#   EPIPHANY_HAS_PYTHON is set if the epiphany is compiled with python support
+AC_DEFUN([EPIPHANY_EXTENSION_INIT],
+[
+dnl Check we have an api-version
+ifelse([$1], [], [AC_MSG_ERROR([Required Epiphany API version not supplied])], [])
+
+_epiphany_api_version=$1
+
+AC_MSG_CHECKING([whether epiphany-$_epiphany_api_version is available])
+PKG_CHECK_EXISTS([epiphany-$_epiphany_api_version], [result=yes],[result=no]) 
+AC_MSG_RESULT([$result])
+
+if test $result = "no" ; then
+    AC_MSG_ERROR([Epiphany API version $_epiphany_api_version is required
+
+This API version is used in the $_epiphany_api_version stable series, and
+the preceeding development series. Please ensure you have the appropriate
+Epiphany version installed.])
+fi
+
+dnl Check the minimum version
+ifelse([$2], [], [],
 [
+  AC_MSG_CHECKING([whether minimum epiphany version $2 is available])
+  PKG_CHECK_EXISTS([epiphany-$_epiphany_api_version >= $2], [result=yes], [result=no])
+  AC_MSG_RESULT([$result])
+
+  if test $result = "no" ; then
+      AC_MSG_ERROR([The minimum epiphany version supported by this application is $2.
+
+Please upgrade to at least $2. If you have compiled a later version it is
+possible pkg-config isn't finding it, in which case set the PKG_CONFIG_PATH
+environment variable.])
+  fi
+])
+
+dnl set the EPIPHANY_EXTENSIONS_DIR variable
+EPIPHANY_EXTENSIONS_DIR="`$PKG_CONFIG --variable=extensionsdir epiphany-$_epiphany_api_version`"
+AC_SUBST([EPIPHANY_EXTENSIONS_DIR])
+
+dnl Look to see if epiphany has python support
+AC_MSG_CHECKING([whether epiphany has python support])
+_epiphany_features="`$PKG_CONFIG --variable=features epiphany-$_epiphany_api_version`"
+if echo "$_epiphany_features" | egrep '(^| )(python)($| )' > /dev/null; then
+    result=yes
+    EPIPHANY_HAS_PYTHON=1
+    AC_SUBST([EPIPHANY_HAS_PYTHON])
+else
+    result=no
+fi
+AC_MSG_RESULT([$result])
 
+dnl Add a rule that auto-translates the .ephy-extension files
+dnl (like the INTLTOOL_XML_RULE does for xml files)
 EPIPHANY_EXTENSION_RULE='%.ephy-extension: %.ephy-extension.in $(INTLTOOL_MERGE) $(wildcard $(top_srcdir)/po/*po) ; LC_ALL=C $(INTLTOOL_MERGE) -d -u -c $(top_builddir)/po/.intltool-merge-cache $(top_srcdir)/po $< [$]@'
 
 AC_SUBST(EPIPHANY_EXTENSION_RULE)