build: derive version string at build-time
refs #2749
Change-Id: Id1d164ff4b1fd5c7e9440a241ab299661ed933c4
diff --git a/wscript b/wscript
index 37259da..07a7524 100644
--- a/wscript
+++ b/wscript
@@ -2,8 +2,9 @@
VERSION = '0.3'
APPNAME = 'ndn-tools'
+GIT_TAG_PREFIX = 'ndn-tools-'
-from waflib import Utils
+from waflib import Utils, Context
import os
def options(opt):
@@ -37,15 +38,66 @@
conf.load('sanitizers')
def build(bld):
- bld.env['VERSION'] = VERSION
+ version(bld)
+
+ bld(features='subst',
+ source='core/version.cpp.in',
+ target='core/version.cpp',
+ VERSION_BUILD=VERSION)
bld(target='core-objects',
name='core-objects',
features='cxx',
- source=bld.path.ant_glob(['core/*.cpp']),
+ source=bld.path.ant_glob(['core/*.cpp']) + ['core/version.cpp'],
use='NDN_CXX BOOST',
+ includes='.',
export_includes='.')
bld.recurse('tools')
bld.recurse('tests')
bld.recurse('manpages')
+
+def version(bld):
+ # Modified from ndn-cxx wscript
+ try:
+ cmd = ['git', 'describe', '--always', '--match', '%s*' % GIT_TAG_PREFIX]
+ p = Utils.subprocess.Popen(cmd, stdout=Utils.subprocess.PIPE,
+ stderr=None, stdin=None)
+ out = str(p.communicate()[0].strip())
+ didGetVersion = (p.returncode == 0 and out != "")
+ if didGetVersion:
+ if out.startswith(GIT_TAG_PREFIX):
+ Context.g_module.VERSION = out[len(GIT_TAG_PREFIX):]
+ else:
+ Context.g_module.VERSION = "%s-commit-%s" % (Context.g_module.VERSION, out)
+ except OSError:
+ pass
+
+ versionFile = bld.path.find_node('VERSION')
+
+ if not didGetVersion and versionFile is not None:
+ try:
+ Context.g_module.VERSION = versionFile.read()
+ return
+ except (OSError, IOError):
+ pass
+
+ # version was obtained from git, update VERSION file if necessary
+ if versionFile is not None:
+ try:
+ version = versionFile.read()
+ if version == Context.g_module.VERSION:
+ return # no need to update
+ except (OSError, IOError):
+ Logs.warn("VERSION file exists, but not readable")
+ else:
+ versionFile = bld.path.make_node('VERSION')
+
+ # neither git describe nor VERSION file contain the version, so fall back to constant in wscript
+ if versionFile is None:
+ Context.g_module.VERSION = VERSION
+
+ try:
+ versionFile.write(Context.g_module.VERSION)
+ except (OSError, IOError):
+ Logs.warn("VERSION file is not writeable")