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t1507: avoid "${parameter<op>'word'}" inside double-quotes

Kacper Kornet noticed that a $variable in "word" in the above construct is
not substituted by his pdksh.  Modern POSIX compliant shells (e.g. dash,
ksh, bash) all seem to interpret POSIX "2.6.2 Parameter Expansion" that
says "word shall be subjected to tilde expansion, parameter expansion,
command substitution, and arithmetic expansion" in ${parameter<op>word},
to mean that the word is expanded as if it appeared in dq pairs, so if the
word were "'$variable'" (sans dq) it would expand to a single quote, the
value of the $variable and then a single quote.

Johannes Sixt reports that the behavior of quoting at the right of :- when
the ${...:-...} expansion appears in double-quotes was debated recently at
length at the Austin group.  We can avoid this issue and future-proof the
test by a slight rewrite.

Helped-by: Johannes Sixt <j.sixt@viscovery.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent e41d718 commit 365c2aaafcdefa65db994ff13071a3a7cd7910fc @gitster gitster committed May 9, 2011
Showing with 5 additions and 2 deletions.
  1. +5 −2 t/t1506-rev-parse-diagnosis.sh
@@ -8,8 +8,11 @@ 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 &&
+ sq="'" &&
+ cat >expected <<-EOF &&
+ fatal: Path '$2$3' $4, but not ${5:-$sq$3$sq}.
+ Did you mean '$1:$2$3'${2:+ aka $sq$1:./$3$sq}?
+ EOF
test_cmp expected error
}

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