added clear cache script, git version script

Author: Abdullah Mughrabi

03_scripts/clear_cache.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+# Note, we are using "echo 3", but it is not recommended in production instead use "echo 1"
+echo 3 > /proc/sys/vm/drop_caches

03_scripts/version.py

@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+########################################################################
+##
+## Copyright 2014 PMC-Sierra, Inc.
+##
+## Licensed under the Apache License, Version 2.0 (the "License"); you
+## may not use this file except in compliance with the License. You may
+## obtain a copy of the License at
+## http://www.apache.org/licenses/LICENSE-2.0 Unless required by
+## applicable law or agreed to in writing, software distributed under the
+## License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+## CONDITIONS OF ANY KIND, either express or implied. See the License for
+## the specific language governing permissions and limitations under the
+## License.
+##
+########################################################################
+
+########################################################################
+##
+##   Author: Logan Gunthorpe
+##
+##   Date: Oct 23, 2014
+##
+##   Description:
+##      Obtain a version string from git information
+##
+########################################################################
+
+from __future__ import print_function
+
+import os
+import subprocess as sp
+
+try:
+    from waflib.Task import Task
+except:
+    Task = object
+
+template = """
+#ifndef VERSION_H
+#define VERSION_H
+
+#define VERSION "%s"
+
+#endif
+"""
+
+def options(opt):
+    pass
+
+def configure(conf):
+    conf.find_program(["git"], var='GIT', mandatory=False)
+    conf.env.append_unique("INCLUDES", ".")
+
+def get_git_version(git="git"):
+    if hasattr(get_git_version, "cached"):
+        return get_git_version.cached
+
+    p = sp.Popen([git, "describe", "--always"], stdout=sp.PIPE,
+                 stderr=open(os.devnull, "w"))
+    version = p.communicate()[0].strip()
+
+    if p.wait():
+        return "exported"
+
+    status = sp.Popen([git, "status", "--porcelain", "-uno"],
+                      stdout=sp.PIPE, stderr=open(os.devnull, "w")).communicate()[0]
+
+    max_length = get_git_version.max_length
+    if max_length:
+        version=version[:max_length]
+
+    if status.strip():
+        if max_length:
+            version=version[:max_length-1]
+        version += "M"
+
+    get_git_version.cached = version
+
+    return version
+
+get_git_version.max_length = 24
+
+class VersionHeader(Task):
+    color = "PINK"
+
+    def __init__(self, *k, **kw):
+        Task.__init__(self, *k, **kw)
+
+        if "target" in kw:
+            self.set_outputs(kw["target"])
+
+    def run(self):
+        rev = self.signature()
+        rev = rev.strip()
+
+        for o in self.outputs:
+            f = open(o.abspath(), "w")
+            print(template % (rev), file=f)
+            f.close()
+
+    def signature(self):
+        try: return self.cache_sig
+        except AttributeError: pass
+
+        if self.env.GIT:
+            self.cache_sig = get_git_version(self.env.GIT[0])
+        else:
+            self.cache_sig = "unknown"
+
+        return self.cache_sig
+
+def build(ctx):
+    tsk = VersionHeader(target=ctx.path.find_or_declare("version.h"),
+                        env=ctx.env)
+    ctx.add_to_group(tsk)
+
+if __name__ == "__main__":
+    try:
+        print(get_git_version())
+    except sp.CalledProcessError:
+        print("unknown")

Makefile

@@ -316,6 +316,11 @@ run-capi-sim-verbose:
 run-capi-fpga-verbose:
 	$(MAKE) run-capi-fpga-verbose $(MAKE_ARGS)
 
+.PHONY: capi
+capi:
+	$(MAKE) run-capi-fpga-verbose $(MAKE_ARGS) &&\
+	sudo ./scripts/clean_cache.sh
+
 .PHONY: run-test-capi
 run-test-capi:
 	$(MAKE) run-test-capi $(MAKE_ARGS)