Re: git-clone fails when current user is not in /etc/passwd

From: Duy Nguyen <pclouds@gmail.com>
Date: Dec 9, 2015, 18:24 UTC
Message-ID: <CACsJy8Dc3Lsqa2zccoqH7UkDitqDbOTX3EXsUCcN9OHY=LfaKw@mail.gmail.com>
In-Reply-To: <CACsJy8AQFSvcxKqSdWfvGArV60RA96WcvvofpfJ4EuG+q_=t0Q@mail.gmail.com>

On Wed, Dec 9, 2015 at 5:08 PM, Duy Nguyen <pclouds@gmail.com> wrote:

Show 24 quoted lines

> On Wed, Dec 2, 2015 at 9:10 PM, Taylor Braun-Jones
> <taylor@braun-jones.org> wrote:
>> My use case it running git clone inside a docker container with
>> `docker run --user $(id -u):$(id -g) --volume /foo:/foo ...`. I want
>> all /foo/* file creation/access from inside the Docker container to be
>> done as the current uid/gid of the host system.
>>
>> Steps to reproduce:
>>
>> mkdir /tmp/docker-git
>> cat > /tmp/docker-git/Dockerfile <<EOF
>> FROM ubuntu
>> RUN apt-get update && apt-get install -y git-core
>> EOF
>> docker build -t git /tmp/docker-git/
>> docker run --user $(id -u):$(id -g) git git clone
>> https://github.com/git/git.git /tmp/git
>> # fatal: unable to look up current user in the passwd file: no such user
>
> It probably helps if you could get the stack trace to this message
> (printed from function xgetpwuid_self). I haven't checked if my
> personal laptop has docker to reproduce this.. In general we won't ask
> passwd if the user specifies name/email in the config file. But I
> still don't see why git-clone needs that info in the first place.

Well.. reflog needs it. So either you disable reflog at clone time or define name/email via config file. I don't see anything wrong with this behavior. Stack trace

(gdb) bt #0 0x0000000000585aaf in xgetpwuid_self () at wrapper.c:608 #1 0x00000000004ef2c4 in ident_default_name () at ident.c:108 #2 0x00000000004ef851 in fmt_ident (name=0x0, email=0x0, date_str=0x0, flag=0) at ident.c:300 #3 0x00000000004efb25 in git_committer_info (flag=0) at ident.c:366 #4 0x000000000052fc6f in log_ref_write_1 (refname=0x16236c0 "refs/remotes/origin/HEAD", old_sha1=0x7ffc91e44190 "", new_sha1=0x7ffc91e44170 "\355\025\033\215p{o\177V\234qX\212j?!v|}D\177", msg=0x1620e50 "clone: from https://github.com/rswier/c4.git", logfile=0x7ffc91e44100, flags=0, err=0x7ffc91e44150) at refs.c:3403 #5 0x000000000052fd85 in log_ref_write (refname=0x16236c0 "refs/remotes/origin/HEAD", old_sha1=0x7ffc91e44190 "", new_sha1=0x7ffc91e44170 "\355\025\033\215p{o\177V\234qX\212j?!v|}D\177", msg=0x1620e50 "clone: from https://github.com/rswier/c4.git", flags=0, err=0x7ffc91e44150) at refs.c:3424 #6 0x00000000005304af in create_symref (ref_target=0x16236c0 "refs/remotes/origin/HEAD", refs_heads_master=0x1624cc0 "refs/remotes/origin/master", logmsg=0x1620e50 "clone: from https://github.com/rswier/c4.git") at refs.c:3592 #7 0x000000000042e50c in update_remote_refs (refs=0x1622d40, mapped_refs=0x1622cc0, remote_head_points_at=0x1624bc0, branch_top=0x1621ca0 "refs/remotes/origin/", msg=0x1620e50 "clone: from https://github.com/rswier/c4.git", transport=0x1622960, check_connectivity=1) at builtin/clone.c:639 #8 0x000000000042f80c in cmd_clone (argc=2, argv=0x7ffc91e44ab8, prefix=0x0) at builtin/clone.c:1066 #9 0x0000000000405fda in run_builtin (p=0x825948 <commands+456>, argc=5, argv=0x7ffc91e44ab8) at git.c:352 #10 0x00000000004061d0 in handle_builtin (argc=5, argv=0x7ffc91e44ab8) at git.c:542 #11 0x00000000004062ec in run_argv (argcp=0x7ffc91e4498c, argv=0x7ffc91e449a0) at git.c:588 #12 0x00000000004064df in main (argc=5, av=0x7ffc91e44aa8) at git.c:695

-- 
Duy