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#!/usr/bin/env python
# Generate version information for a program
#
# Copyright (C) 2015 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import sys, os, subprocess, shlex, time, socket, optparse, logging, traceback
VERSION_FORMAT = """
/* DO NOT EDIT! This is an autogenerated file. See scripts/buildversion.py. */
#define BUILD_VERSION "%s"
#define BUILD_TOOLS "%s"
"""
# Run program and return the specified output
def check_output(prog):
logging.debug("Running %s" % (repr(prog),))
try:
process = subprocess.Popen(shlex.split(prog), stdout=subprocess.PIPE)
output = process.communicate()[0]
retcode = process.poll()
except OSError:
logging.debug("Exception on run: %s" % (traceback.format_exc(),))
return ""
logging.debug("Got (code=%s): %s" % (retcode, repr(output)))
if retcode:
return ""
try:
return output.decode()
except UnicodeError:
logging.debug("Exception on decode: %s" % (traceback.format_exc(),))
return ""
# Obtain version info from "git" program
def git_version():
if not os.path.exists('.git'):
logging.debug("No '.git' file/directory found")
return ""
ver = check_output("git describe --always --tags --long --dirty").strip()
logging.debug("Got git version: %s" % (repr(ver),))
return ver
# Look for version in a ".version" file. Official release tarballs
# have this file (see scripts/tarball.sh).
def file_version():
if not os.path.isfile('.version'):
logging.debug("No '.version' file found")
return ""
try:
f = open('.version', 'r')
ver = f.readline().strip()
f.close()
except OSError:
logging.debug("Exception on read: %s" % (traceback.format_exc(),))
return ""
logging.debug("Got .version: %s" % (repr(ver),))
return ver
# Generate an output file with the version information
def write_version(outfile, version, toolstr):
logging.debug("Write file %s and %s" % (repr(version), repr(toolstr)))
sys.stdout.write("Version: %s\n" % (version,))
f = open(outfile, 'w')
f.write(VERSION_FORMAT % (version, toolstr))
f.close()
# Run "tool --version" for each specified tool and extract versions
def tool_versions(tools):
tools = [t.strip() for t in tools.split(';')]
versions = ['', '']
success = 0
for tool in tools:
# Extract first line from "tool --version" output
verstr = check_output("%s --version" % (tool,)).split('\n')[0]
# Check if this tool looks like a binutils program
isbinutils = 0
if verstr.startswith('GNU '):
isbinutils = 1
verstr = verstr[4:]
# Extract version information and exclude program name
if ' ' not in verstr:
continue
prog, ver = verstr.split(' ', 1)
if not prog or not ver:
continue
# Check for any version conflicts
if versions[isbinutils] and versions[isbinutils] != ver:
logging.debug("Mixed version %s vs %s" % (
repr(versions[isbinutils]), repr(ver)))
versions[isbinutils] = "mixed"
continue
versions[isbinutils] = ver
success += 1
cleanbuild = versions[0] and versions[1] and success == len(tools)
return cleanbuild, "gcc: %s binutils: %s" % (versions[0], versions[1])
def main():
usage = "%prog [options] <outputheader.h>"
opts = optparse.OptionParser(usage)
opts.add_option("-e", "--extra", dest="extra", default="",
help="extra version string to append to version")
opts.add_option("-t", "--tools", dest="tools", default="",
help="list of build programs to extract version from")
opts.add_option("-v", action="store_true", dest="verbose",
help="enable debug messages")
options, args = opts.parse_args()
if len(args) != 1:
opts.error("Incorrect arguments")
outfile = args[0]
if options.verbose:
logging.basicConfig(level=logging.DEBUG)
cleanbuild, toolstr = tool_versions(options.tools)
ver = git_version()
cleanbuild = cleanbuild and 'dirty' not in ver
if not ver:
ver = file_version()
# We expect the "extra version" to contain information on the
# distributor and distribution package version (if
# applicable). It is a "clean" build if this is a build from
# an official release tarball and the above info is present.
cleanbuild = cleanbuild and ver and options.extra != ""
if not ver:
ver = "?"
if not cleanbuild:
btime = time.strftime("%Y%m%d_%H%M%S", time.gmtime(int(os.environ.get('SOURCE_DATE_EPOCH', time.time()))))
ver = "%s-%s" % (ver, btime)
write_version(outfile, ver + options.extra, toolstr)
if __name__ == '__main__':
main()
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