eventsapi: Auto generate header files during make

$SRC/libglusterfs/src/eventtypes.h and $SRC/events/src/eventtypes.py are
generated by running `python $SRC/events/eventskeygen.py`

Header files generation step is added to make file itself, Now All new
events should be added to only to $SRC/events/eventskeygen.py file.

BUG: 1361094
Change-Id: I384961ef2978ca2d0be37f288b39ac0d834bdf06
Signed-off-by: Aravinda VK <avishwan@redhat.com>
Reviewed-on: http://review.gluster.org/15035
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Kotresh HR <khiremat@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

3 files changed, 35 insertions, 34 deletions

diff --git a/events/eventskeygen.py b/events/eventskeygen.py
index f9bdb9fed52..5bb03191135 100644
--- a/events/eventskeygen.py
+++ b/events/eventskeygen.py
@@ -11,11 +11,14 @@
 #
 
 import os
+import sys
 
 GLUSTER_SRC_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 eventtypes_h = os.path.join(GLUSTER_SRC_ROOT, "libglusterfs/src/eventtypes.h")
 eventtypes_py = os.path.join(GLUSTER_SRC_ROOT, "events/src/eventtypes.py")
 
+gen_header_type = sys.argv[1]
+
 # When adding new keys add it to the END
 keys = (
     "EVENT_PEER_ATTACH",
@@ -39,29 +42,31 @@ ERRORS = (
     "EVENT_ERROR_SEND"
 )
 
-# Generate eventtypes.h
-with open(eventtypes_h, "w") as f:
-    f.write("#ifndef __EVENTTYPES_H__\n")
-    f.write("#define __EVENTTYPES_H__\n\n")
-    f.write("typedef enum {\n")
-    for k in ERRORS:
-        f.write("    {0},\n".format(k))
-    f.write("} event_errors_t;\n")
+if gen_header_type == "C_HEADER":
+    # Generate eventtypes.h
+    with open(eventtypes_h, "w") as f:
+        f.write("#ifndef __EVENTTYPES_H__\n")
+        f.write("#define __EVENTTYPES_H__\n\n")
+        f.write("typedef enum {\n")
+        for k in ERRORS:
+            f.write("    {0},\n".format(k))
+        f.write("} event_errors_t;\n")
 
-    f.write("\n")
+        f.write("\n")
 
-    f.write("typedef enum {\n")
-    for k in keys:
-        f.write("    {0},\n".format(k))
+        f.write("typedef enum {\n")
+        for k in keys:
+            f.write("    {0},\n".format(k))
 
-    f.write("    {0}\n".format(LAST_EVENT))
-    f.write("} eventtypes_t;\n")
-    f.write("\n#endif /* __EVENTTYPES_H__ */\n")
+        f.write("    {0}\n".format(LAST_EVENT))
+        f.write("} eventtypes_t;\n")
+        f.write("\n#endif /* __EVENTTYPES_H__ */\n")
 
-# Generate eventtypes.py
-with open(eventtypes_py, "w") as f:
-    f.write("# -*- coding: utf-8 -*-\n")
-    f.write("all_events = [\n")
-    for ev in keys:
-        f.write('    "{0}",\n'.format(ev))
-    f.write("]\n")
+if gen_header_type == "PY_HEADER":
+    # Generate eventtypes.py
+    with open(eventtypes_py, "w") as f:
+        f.write("# -*- coding: utf-8 -*-\n")
+        f.write("all_events = [\n")
+        for ev in keys:
+            f.write('    "{0}",\n'.format(ev))
+        f.write("]\n")
diff --git a/events/src/Makefile.am b/events/src/Makefile.am
index 50317d45191..8b2150e3aa9 100644
--- a/events/src/Makefile.am
+++ b/events/src/Makefile.am
@@ -1,6 +1,10 @@
-EXTRA_DIST = glustereventsd.py __init__.py  eventsapiconf.py.in eventtypes.py \
+noinst_PYTHON = $(top_srcdir)/events/eventskeygen.py
+EXTRA_DIST = glustereventsd.py __init__.py  eventsapiconf.py.in \
 	handlers.py utils.py peer_eventsapi.py eventsconfig.json
 
+BUILT_SOURCES = eventtypes.py
+CLEANFILES = eventtypes.py
+
 eventsdir = $(libexecdir)/glusterfs/events
 eventspeerscriptdir = $(libexecdir)/glusterfs
 eventsconfdir = $(sysconfdir)/glusterfs
@@ -10,6 +14,9 @@ events_PYTHON = __init__.py eventsapiconf.py eventtypes.py handlers.py utils.py
 events_SCRIPTS = glustereventsd.py
 eventspeerscript_SCRIPTS = peer_eventsapi.py
 
+eventtypes.py: $(top_srcdir)/events/eventskeygen.py
+	$(PYTHON) $(top_srcdir)/events/eventskeygen.py PY_HEADER
+
 install-exec-hook:
 	$(mkdir_p) $(DESTDIR)$(sbindir)
 	rm -f $(DESTDIR)$(sbindir)/glustereventsd
diff --git a/events/src/eventtypes.py b/events/src/eventtypes.py
deleted file mode 100644
index b09e5bcff9a..00000000000
--- a/events/src/eventtypes.py
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- coding: utf-8 -*-
-all_events = [
-    "EVENT_PEER_ATTACH",
-    "EVENT_PEER_DETACH",
-    "EVENT_VOLUME_CREATE",
-    "EVENT_VOLUME_START",
-    "EVENT_VOLUME_STOP",
-    "EVENT_VOLUME_DELETE",
-    "EVENT_VOLUME_SET",
-    "EVENT_VOLUME_RESET",
-]