From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Anton Mitterer Subject: [BUG] git svn's --localtime seems to corrupt time zones Date: Mon, 16 Mar 2015 18:31:47 +0100 Message-ID: <1426527107.18487.14.camel@scientia.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="sha-512"; protocol="application/x-pkcs7-signature"; boundary="=-br1E/BxIT6a1MTIYrWPN" To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Mon Mar 16 18:31:59 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YXYrt-0004iu-Gy for gcvg-git-2@plane.gmane.org; Mon, 16 Mar 2015 18:31:58 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757159AbbCPRbw (ORCPT ); Mon, 16 Mar 2015 13:31:52 -0400 Received: from mailgw-01.dd24.net ([193.46.215.41]:53251 "EHLO mailgw01.dd24.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754339AbbCPRbv (ORCPT ); Mon, 16 Mar 2015 13:31:51 -0400 Received: from mailpolicy-01.live.igb.homer.key-systems.net (mailpolicy-01.live.igb.homer.key-systems.net [192.168.1.26]) by mailgw01.dd24.net (Postfix) with ESMTP id C9EE35FB69 for ; Mon, 16 Mar 2015 17:31:49 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mailpolicy-01.live.igb.homer.key-systems.net Received: from mailgw01.dd24.net ([192.168.1.35]) by mailpolicy-01.live.igb.homer.key-systems.net (mailpolicy-01.live.igb.homer.key-systems.net [192.168.1.25]) (amavisd-new, port 10235) with ESMTP id rJBC497KW4B2 for ; Mon, 16 Mar 2015 17:31:47 +0000 (UTC) Received: from heisenberg.fritz.box (ppp-93-104-121-105.dynamic.mnet-online.de [93.104.121.105]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailgw01.dd24.net (Postfix) with ESMTPSA for ; Mon, 16 Mar 2015 17:31:47 +0000 (UTC) X-Mailer: Evolution 3.12.9-1+b1 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: --=-br1E/BxIT6a1MTIYrWPN Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi. I was converting some very old svn repos of mine into git using git svn, and since I didn't fully trust the conversion process I wrote a small tool which goes through all commits/revisions (there were no branches or non-linear stuff involved in these svn repos) and compares the author names, dates, commit messages and file tree for each revision/commit. I used something like: git svn clone --trunk=3D/ --no-metadata --localtime --preserve-empty-dirs --authors-file=3D~/authors.txt file:///... and used --localtime since I wanted the times/dates with the original time zones (just as it seems to happen with a normal git repo as well). The svn repo contained commits with different time zones (mostly because of daylight saving times). With the diff tool I've noticed the following behaviour: Apparently, whenever --localtime is given, git svn takes SVN's time as is, completely ignoring it's time zone, storing *everything* in the current(!) local time zone. This has IMHO two bugs: 1) it doesn't do what one expects and what the manpage promises: > --localtime > Store Git commit times in the local time zone instead of UTC. > This makes git log (even without --date=3Dlocal) show the same > times that svn log would in the local time zone. =3D> This isn't true, cause while svn log shows the differing time zones (in my case +0100 and +0200 when the DST changes), git log shows everything in +0100. 2) but even worse, as said above, it seems to ignore the time zones from SVN, so when I'm currently in +0100, all the svn times from +0100 will be correct, but all the ones that were stored in +0200 (or anything else) will have exactly the same time value just the zone changed to +0100, thereby corrupting the time. Example svn log output: $ svn log | grep ^r | head -n 4 r781 | calestyo | 2008-08-12 23:26:12 +0200 (Tue, 12 Aug 2008) | 2 lines r780 | calestyo | 2008-01-11 01:16:59 +0100 (Fri, 11 Jan 2008) | 2 lines r779 | calestyo | 2008-01-06 19:43:08 +0100 (Sun, 06 Jan 2008) | 2 lines r778 | calestyo | 2008-01-06 18:51:37 +0100 (Sun, 06 Jan 2008) | 2 lines And from the corresponding "converted" git repo: $ git log --date=3Diso8601 | grep ^Date: | head -n 4 Date: 2008-08-12 23:26:12 +0100 Date: 2008-01-11 01:16:59 +0100 Date: 2008-01-06 19:43:08 +0100 Date: 2008-01-06 18:51:37 +0100 All packages from Debian sid, i.e. git 2.1.4 and subversion 1.8.10. Any ideas? Cheers, Chris. --=-br1E/BxIT6a1MTIYrWPN Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCEZIw ggW/MIIDp6ADAgECAgMCOakwDQYJKoZIhvcNAQENBQAwVDEUMBIGA1UEChMLQ0FjZXJ0IEluYy4x HjAcBgNVBAsTFWh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzEcMBoGA1UEAxMTQ0FjZXJ0IENsYXNzIDMg Um9vdDAeFw0xNDA2MTIxNjM2MThaFw0xNjA2MTExNjM2MThaMHwxITAfBgNVBAMTGENocmlzdG9w aCBBbnRvbiBNaXR0ZXJlcjEkMCIGCSqGSIb3DQEJARYVY2FsZXN0eW9Ac2NpZW50aWEubmV0MTEw LwYJKoZIhvcNAQkBFiJtYWlsQGNocmlzdG9waC5hbnRvbi5taXR0ZXJlci5uYW1lMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4phP/j9vT9dZT+k3ffHxvRWMOuzBnu5O3Fl4y2+WL7pL rfLiEhWzGXhHvjSqpt4vCNSdqy43453nnu8+hMb+uEtqSIL1AHU5eLhuDNVN9S4bt9E7nA2WKYBU LCUi/xCD/GL7ToyJNwhrhzcCZ7pXSc3xVqFoC4f6weU9ExhoEZQNRpTM0BFCOi4fRxvKFNnUYgjK hqy0Ta5H0Xx86mAp0Q4dxoD7mhI5iTF6TRkUheELxF24JCuAf04M89Cwft6DRH1FpJ3yvgW2B5U5 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