[PATCH v2 6/6] trace-cmd: Change plugin install directories

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

From: Tzvetomir Stoyanov <tstoyanov@vmware.com>

To be compliant with XDG user directory layout,
the user's plugin directory is changed from
~/.traceevent/plugins to ~/.local/lib/traceevent/plugins/
Thanks to Patrick McLean:
https://lore.kernel.org/linux-trace-devel/20190313144206.41e75cf8@patrickm/

The system plugin directory is changed from
(install_prefix)/lib/trace-cmd/plugins to (install_prefix)/lib/traceevent/plugins
This change paves the way for implementing trace-cmd specific plugins.

Suggested-by: Patrick McLean <chutzpah@gentoo.org>
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 Makefile                      | 16 ++++++++--------
 lib/traceevent/event-plugin.c |  6 +++---
 plugins/traceevent/Makefile   |  6 +++---
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 8b228f5..5bfb558 100644
--- a/Makefile
+++ b/Makefile
@@ -59,15 +59,15 @@ export img_install img_install_SQ
 export DESTDIR DESTDIR_SQ
 
 ifeq ($(prefix),$(HOME))
-plugin_dir = $(HOME)/.trace-cmd/plugins
+plugin_traceevent_dir = $(HOME)/.local/lib/traceevent/plugins
 python_dir = $(HOME)/.trace-cmd/python
 var_dir = $(HOME)/.trace-cmd/
 else
-plugin_dir = $(libdir)/trace-cmd/plugins
+plugin_traceevent_dir = $(libdir)/traceevent/plugins
 python_dir = $(libdir)/trace-cmd/python
-PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
+PLUGIN_TRACEEVENT_DIR = -DPLUGIN_DIR="$(plugin_traceevent_dir)"
 PYTHON_DIR = -DPYTHON_DIR="$(python_dir)"
-PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
+PLUGIN_TRACEEVENT_DIR_SQ = '$(subst ','\'',$(PLUGIN_TRACEEVENT_DIR))'
 PYTHON_DIR_SQ = '$(subst ','\'',$(PYTHON_DIR))'
 var_dir = /var
 endif
@@ -75,7 +75,7 @@ endif
 # Shell quotes
 bindir_SQ = $(subst ','\'',$(bindir))
 bindir_relative_SQ = $(subst ','\'',$(bindir_relative))
-plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
+plugin_traceevent_dir_SQ = $(subst ','\'',$(plugin_traceevent_dir))
 python_dir_SQ = $(subst ','\'',$(python_dir))
 
 VAR_DIR = -DVAR_DIR="$(var_dir)"
@@ -88,10 +88,10 @@ HELP_DIR_SQ = '$(subst ','\'',$(HELP_DIR))'
 
 BASH_COMPLETE_DIR ?= /etc/bash_completion.d
 
-export PLUGIN_DIR
+export PLUGIN_TRACEEVENT_DIR
 export PYTHON_DIR
 export PYTHON_DIR_SQ
-export plugin_dir_SQ
+export plugin_traceevent_dir_SQ
 export python_dir_SQ
 export var_dir
 
@@ -235,7 +235,7 @@ LIBS += -laudit
 endif
 
 # Append required CFLAGS
-override CFLAGS += $(INCLUDES) $(PLUGIN_DIR_SQ) $(VAR_DIR)
+override CFLAGS += $(INCLUDES) $(PLUGIN_TRACEEVENT_DIR_SQ) $(VAR_DIR)
 override CFLAGS += $(udis86-flags) $(blk-flags)
 
 CMD_TARGETS = trace-cmd $(BUILD_PYTHON)
diff --git a/lib/traceevent/event-plugin.c b/lib/traceevent/event-plugin.c
index fdaadba..383a8be 100644
--- a/lib/traceevent/event-plugin.c
+++ b/lib/traceevent/event-plugin.c
@@ -20,7 +20,7 @@
 #include "event-utils.h"
 #include "trace-seq.h"
 
-#define LOCAL_PLUGIN_DIR ".traceevent/plugins"
+#define LOCAL_PLUGIN_DIR ".local/lib/traceevent/plugins/"
 
 static struct registered_plugin_options {
 	struct registered_plugin_options	*next;
@@ -579,9 +579,9 @@ void tep_load_plugins_hook(struct tep_handle *tep, const char *suffix,
 	 * If a system plugin directory was defined,
 	 * check that first.
 	 */
-#ifdef PLUGIN_DIR
+#ifdef PLUGIN_TRACEEVENT_DIR
 	if (!tep || !(tep->flags & TEP_DISABLE_SYS_PLUGINS))
-		load_plugins_dir(tep, suffix, PLUGIN_DIR,
+		load_plugins_dir(tep, suffix, PLUGIN_TRACEEVENT_DIR,
 				 load_plugin, data);
 #endif
 
diff --git a/plugins/traceevent/Makefile b/plugins/traceevent/Makefile
index 8ed65d3..98fcc4d 100644
--- a/plugins/traceevent/Makefile
+++ b/plugins/traceevent/Makefile
@@ -53,16 +53,16 @@ $(bdir)/plugin_python.so: $(bdir)/%.so: $(bdir)/%.o
 PLUGINS_INSTALL = $(subst .so,.install,$(PLUGINS))
 
 $(PLUGINS_INSTALL): $(bdir)/%.install : $(bdir)/%.so force
-	$(Q)$(call do_install_data,$<,$(plugin_dir_SQ))
+	$(Q)$(call do_install_data,$<,$(plugin_traceevent_dir_SQ))
 
 install_plugins: $(PLUGINS_INSTALL)
 
-# The following targets are necessary to trigger a rebuild when $(PLUGIN_DIR)
+# The following targets are necessary to trigger a rebuild when $(PLUGIN_TRACEEVENT_DIR)
 # and $(PYTHON_DIR) change. Without them, a full clean build would necessary
 # in order to get the binaries updated.
 
 $(bdir)/traceevent_plugin_dir: $(bdir) force
-	$(Q)$(N)$(call update_dir, 'PLUGIN_DIR=$(PLUGIN_DIR)')
+	$(Q)$(N)$(call update_dir, 'PLUGIN_TRACEEVENT_DIR=$(PLUGIN_TRACEEVENT_DIR)')
 
 $(bdir)/trace_python_dir: $(bdir) force
 	$(Q)$(N)$(call update_dir, 'PYTHON_DIR=$(PYTHON_DIR)')
-- 
2.21.0