Re: git fast-export | git fast-import doesn't work

From: Peter Baumann <waste.manager@gmx.de>
Date: Nov 25, 2008, 17:34 UTC
Message-ID: <20081125173447.GB13935@m62s10.vlinux.de>
In-Reply-To: <85b5c3130811250844u498fbb97m9d1aef6e1397b8c7@mail.gmail.com>

On Tue, Nov 25, 2008 at 05:44:28PM +0100, Ondrej Certik wrote:

Show 6 quoted lines

> Hi,
> 
> I would like to export our whole git repository to patches, and then
> reconstruct it again from scratch. Following the man page of "git
> fast-export":
>

Perhabs you are looking for git filter-branch, because it seems you want to change the history in some way (e.g. remove a wrongly committed file)?

Nevertheless, I expect your shown commands below to procude the same repo again, so you might be on something ...

-Peter

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> $ git clone git://git.sympy.org/sympy-full-history-20081023.git
> $ cd sympy-full-history-20081023
> $ git fast-export --all --export-marks=marks > patches
> $ cd ..
> $ mkdir sympy-new
> $ cd sympy-new
> $ git init
> $ git fast-import --export-marks=marks < ../sympy-full-history-20081023/patches
> git-fast-import statistics:
> ---------------------------------------------------------------------
> Alloc'd objects:      25000
> Total objects:        21355 (       144 duplicates                  )
>       blobs  :         8009 (         0 duplicates       4529 deltas)
>       trees  :        10627 (       144 duplicates       9189 deltas)
>       commits:         2719 (         0 duplicates          0 deltas)
>       tags   :            0 (         0 duplicates          0 deltas)
> Total branches:          21 (        26 loads     )
>       marks:        1048576 (     10728 unique    )
>       atoms:            726
> Memory total:          2880 KiB
>        pools:          2098 KiB
>      objects:           781 KiB
> ---------------------------------------------------------------------
> pack_report: getpagesize()            =       4096
> pack_report: core.packedGitWindowSize =   33554432
> pack_report: core.packedGitLimit      =  268435456
> pack_report: pack_used_ctr            =      40706
> pack_report: pack_mmap_calls          =       2791
> pack_report: pack_open_windows        =          1 /          2
> pack_report: pack_mapped              =   26177739 /   35513414
> ---------------------------------------------------------------------
> 
> 
> 
> However, the repository is very different to the original one. It
> contains only 191 patches:
> 
> $ git log --pretty=oneline | wc -l
> 191
> 
> and it only contains couple files. Compare this with the original repository:
> 
> $ git log --pretty=oneline | wc -l
> 2719
> 
> What am I doing wrong? Is there some other way to do it? I also tried
> "git format-patch" and "git am" and that almost works, only it changes
> hashes. Is there some way to tell "git am" to preserve the hash?
> 
> Thanks,
> Ondrej