Junio C Hamano venit, vidit, dixit 05.05.2011 22:02:
> Kacper Kornet <draenog@xxxxxxxxxxxxx> writes:
>
>> In bash and some other shells the script:
>>
>> x=2; unset a; echo "${a:-'$x'}"
>>
>> prints '2'. However ksh shell prints $x. The quoting is added to
>> reproduce bash behaviour.
>
> What I happen to have in /usr/bin/ksh
>
> $ /usr/bin/ksh --version
> version sh (AT&T Research) 93t+ 2009-05-01
>
> does not seem to have this issue.
>
> Whose ksh is this? It is broken.
>
> POSIX "2.6.2 Parameter Expansion" [*1*] says in ${parameter<op>word},
> "word shall be subjected to tilde expansion, parameter expansion, command
> substitution, and arithmetic expansion", when "a value of word is needed"
> based on the state of parameter.
>
> I am not opposed to the change, but because it is not "change to more
> general one" but "work around a bug in <this implementation of ksh>", and
> I would like to know what to fill in the blank when I rewrite the proposed
> commit log message.
I'm running all tests with "dash" these days, and I'm pretty sure "these
days" started before 34df9ab. Anyways, this test passes with dash. I'd
be happy to replace my test shell with an even stricter one if needed.
>> Signed-off-by: Kacper Kornet <draenog@xxxxxxxxxxxxx>
>> ---
>> t/t1506-rev-parse-diagnosis.sh | 4 ++--
>> 1 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/t/t1506-rev-parse-diagnosis.sh b/t/t1506-rev-parse-diagnosis.sh
>> index 4a6396f..bad09f9 100755
>> --- a/t/t1506-rev-parse-diagnosis.sh
>> +++ b/t/t1506-rev-parse-diagnosis.sh
>> @@ -8,8 +8,8 @@ exec </dev/null
>>
>> test_did_you_mean ()
>> {
>> - printf "fatal: Path '$2$3' $4, but not ${5:-'$3'}.\n" >expected &&
>> - printf "Did you mean '$1:$2$3'${2:+ aka '$1:./$3'}?\n" >>expected &&
>> + printf "fatal: Path '$2$3' $4, but not ${5:-\'$3\'}.\n" >expected &&
>> + printf "Did you mean '$1:$2$3'${2:+ aka \'$1:./$3\'}?\n" >>expected &&
>> test_cmp expected error
>> }
>>
>> --
>> 1.7.5
>
> [Reference]
>
> *1* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02
Other than that, I have no objections if this patch makes more shells
happy and no happy ones unhappy.
Is your ksh OK with all other tests?
Michael
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