Author: ericwf
Date: Fri Nov 18 05:26:14 2016
New Revision: 287336
URL: http://llvm.org/viewvc/llvm-project?rev=287336&view=rev
Log:
Add merge_archives.py utility
Added:
libcxx/trunk/utils/merge_archives.py
Added: libcxx/trunk/utils/merge_archives.py
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/utils/merge_archives.py?rev=287336&view=auto
==============================================================================
--- libcxx/trunk/utils/merge_archives.py (added)
+++ libcxx/trunk/utils/merge_archives.py Fri Nov 18 05:26:14 2016
@@ -0,0 +1,119 @@
+#!/usr/bin/env python
+#===----------------------------------------------------------------------===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is dual licensed under the MIT and the University of Illinois Open
+# Source Licenses. See LICENSE.TXT for details.
+#
+#===----------------------------------------------------------------------===##
+
+from argparse import ArgumentParser
+import distutils.spawn
+import glob
+import tempfile
+import os
+import shutil
+import subprocess
+import signal
+import sys
+
+temp_directory_root = None
+def exit_with_cleanups(status):
+ if temp_directory_root is not None:
+ shutil.rmtree(temp_directory_root)
+ sys.exit(status)
+
+def print_and_exit(msg):
+ sys.stderr.write(msg + '\n')
+ exit_with_cleanups(1)
+
+def diagnose_missing(file):
+ if not os.path.exists(file):
+ print_and_exit("input '%s' does not exist" % file)
+
+
+def execute_command(cmd, cwd=None):
+ """
+ Execute a command, capture and return its output.
+ """
+ kwargs = {
+ 'stdin': subprocess.PIPE,
+ 'stdout': subprocess.PIPE,
+ 'stderr': subprocess.PIPE,
+ 'cwd': cwd
+ }
+ p = subprocess.Popen(cmd, **kwargs)
+ out, err = p.communicate()
+ exitCode = p.wait()
+ if exitCode == -signal.SIGINT:
+ raise KeyboardInterrupt
+ return out, err, exitCode
+
+
+def execute_command_verbose(cmd, cwd=None, verbose=False):
+ """
+ Execute a command and print its output on failure.
+ """
+ out, err, exitCode = execute_command(cmd, cwd=cwd)
+ if exitCode != 0 or verbose:
+ report = "Command: %s\n" % ' '.join(["'%s'" % a for a in cmd])
+ if exitCode != 0:
+ report += "Exit Code: %d\n" % exitCode
+ if out:
+ report += "Standard Output:\n--\n%s--" % out
+ if err:
+ report += "Standard Error:\n--\n%s--" % err
+ if exitCode != 0:
+ report += "\n\nFailed!"
+ sys.stderr.write('%s\n' % report)
+ if exitCode != 0:
+ exit_with_cleanups(exitCode)
+
+def main():
+ parser = ArgumentParser(
+ description="Merge multiple archives into a single library")
+ parser.add_argument(
+ '-v', '--verbose', dest='verbose', action='store_true', default=False)
+ parser.add_argument(
+ '-o', '--output', dest='output', required=True,
+ help='The output file. stdout is used if not given',
+ type=str, action='store')
+ parser.add_argument(
+ 'archives', metavar='archives', nargs='+',
+ help='The archives to merge')
+
+ args = parser.parse_args()
+
+ ar_exe = distutils.spawn.find_executable('ar')
+ if not ar_exe:
+ print_and_exit("failed to find 'ar' executable")
+
+ if len(args.archives) < 2:
+ print_and_exit('fewer than 2 inputs provided')
+ archives = []
+ for ar in args.archives:
+ diagnose_missing(ar)
+ # Make the path absolute so it isn't affected when we change the PWD.
+ archives += [os.path.abspath(ar)]
+
+ if not os.path.exists(os.path.dirname(args.output)):
+ print_and_exit("output path doesn't exist: '%s'" % args.output)
+
+ global temp_directory_root
+ temp_directory_root = tempfile.mkdtemp('.libcxx.merge.archives')
+
+ for arc in archives:
+ execute_command_verbose([ar_exe, '-x', arc], cwd=temp_directory_root,
+ verbose=args.verbose)
+
+ files = glob.glob(os.path.join(temp_directory_root, '*.o'))
+ if not files:
+ print_and_exit('Failed to glob for %s' % glob_path)
+ cmd = [ar_exe, '-qc', args.output] + files
+ execute_command_verbose(cmd, cwd=temp_directory_root, verbose=args.verbose)
+
+
+if __name__ == '__main__':
+ main()
+ exit_with_cleanups(0)
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