From 788001908c8960daa162c32baf3dc0f9ad1c16f8 Mon Sep 17 00:00:00 2001 From: Scott Lamb Date: Sun, 15 Jul 2007 20:58:11 -0700 Subject: [PATCH] git-p4: input to "p4 files" by stdin instead of arguments This approach, suggested by Alex Riesen, bypasses the need for xargs-style argument list handling. The handling in question looks broken in a corner case with SC_ARG_MAX=4096 and final argument over 96 characters. Signed-off-by: Scott Lamb Signed-off-by: Simon Hausmann --- contrib/fast-import/git-p4 | 28 +++++++--------------------- 1 file changed, 7 insertions(+), 21 deletions(-) diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4 index d93e656155..54053e3f3d 100755 --- a/contrib/fast-import/git-p4 +++ b/contrib/fast-import/git-p4 @@ -725,27 +725,13 @@ class P4Sync(Command): if not files: return - # We cannot put all the files on the command line - # OS have limitations on the max lenght of arguments - # POSIX says it's 4096 bytes, default for Linux seems to be 130 K. - # and all OS from the table below seems to be higher than POSIX. - # See http://www.in-ulm.de/~mascheck/various/argmax/ - if (self.isWindows): - argmax = 2000 - else: - argmax = min(4000, os.sysconf('SC_ARG_MAX')) - - chunk = '' - filedata = [] - for i in xrange(len(files)): - f = files[i] - chunk += '"%s#%s" ' % (f['path'], f['rev']) - if len(chunk) > argmax or i == len(files)-1: - data = p4CmdList('print %s' % chunk) - if "p4ExitCode" in data[0]: - die("Problems executing p4. Error: [%d]." % (data[0]['p4ExitCode'])); - filedata.extend(data) - chunk = '' + filedata = p4CmdList('-x - print', + stdin='\n'.join(['%s#%s' % (f['path'], f['rev']) + for f in files]), + stdin_mode='w+') + if "p4ExitCode" in filedata[0]: + die("Problems executing p4. Error: [%d]." + % (filedata[0]['p4ExitCode'])); j = 0; contents = {}