Thanks for the help. Both
    (1) atag = !sh -c 'git tag -a -m "$0" "$0"'
and
    (2) atag = !sh -c 'git tag -a -m "$1" "$1"' -
work, but in the latter case the '-' is indeed crucial.
If not given, $1 is not set and git tag complains badly.
When called without any args, (1) sets a tag called "sh"
whereas (2) complains about the missing value for the -m option.
So I decided to use the second form. Shells are funny things. ;-)

BTW: Is it true that "-a" is implicitely added to "git tag"
when the "-m" switch is present, i.e. are
    $ git tag -m foo foo
and
    $ git tag -a -m foo foo
equivalent? Thought so, but it's not in the docs.

Junio C Hamano schrieb:
quoted text
> "Jay Soffian" <jaysoffian@gmail.com> writes:
>
>   
>> All my shell aliases therefor look like:
>>
>> h          = "!sh -c 'git alias \"\" || git help \"\"' -"
>>
>> (Notice the trailing '-'.)
>>     
>
> Just for my curiosity, why aren't they
>
>   
>> h          = "!sh -c 'git alias \"__PLACEHOLDER__0_\" || git help \"__PLACEHOLDER__0_\"'"
>>     
>
> without trailing '-'?
>   
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