[PATCH] t1402: work around shell quoting issue on NetBSD

[PATCH] t1402: work around shell quoting issue on NetBSD

[René Scharfe]

The test fails for me on NetBSD 6.0.1 and reports:

	ok 1 - ref name '' is invalid
	ok 2 - ref name '/' is invalid
	ok 3 - ref name '/' is invalid with options --allow-onelevel
	ok 4 - ref name '/' is invalid with options --normalize
	error: bug in the test script: not 2 or 3 parameters to test-expect-success

The alleged bug is in this line:

	invalid_ref NOT_MINGW '/' '--allow-onelevel --normalize'

invalid_ref() constructs a test case description using its last argument,
but the shell seems to split it up into two pieces if it contains a
space.  Minimal test case:

	# on NetBSD with /bin/sh
	$ a() { echo $#-$1-$2; }
	$ t="x"; a "${t:+$t}"
	1-x-
	$ t="x y"; a "${t:+$t}"
	2-x-y
	$ t="x y"; a "${t:+x y}"
	1-x y-

	# and with bash
	$ t="x y"; a "${t:+$t}"
	1-x y-
	$ t="x y"; a "${t:+x y}"
	1-x y-

This may be a bug in the shell, but here's a simple workaround: Construct
the description string first and store it in a variable, and then use
that to call test_expect_success().

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
---
 t/t1402-check-ref-format.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/t/t1402-check-ref-format.sh b/t/t1402-check-ref-format.sh
index 1ae4d87..1a5a5f3 100755
--- a/t/t1402-check-ref-format.sh
+++ b/t/t1402-check-ref-format.sh
@@ -11,7 +11,8 @@ valid_ref() {
 		prereq=$1
 		shift
 	esac
-	test_expect_success $prereq "ref name '$1' is valid${2:+ with options $2}" "
+	desc="ref name '$1' is valid${2:+ with options $2}"
+	test_expect_success $prereq "$desc" "
 		git check-ref-format $2 '$1'
 	"
 }
@@ -22,7 +23,8 @@ invalid_ref() {
 		prereq=$1
 		shift
 	esac
-	test_expect_success $prereq "ref name '$1' is invalid${2:+ with options $2}" "
+	desc="ref name '$1' is invalid${2:+ with options $2}"
+	test_expect_success $prereq "$desc" "
 		test_must_fail git check-ref-format $2 '$1'
 	"
 }
-- 
1.7.12

Re: [PATCH] t1402: work around shell quoting issue on NetBSD

[Junio C Hamano]

René Scharfe <rene.scharfe@lsrfire.ath.cx> writes:

> The test fails for me on NetBSD 6.0.1 and reports:
>
> 	ok 1 - ref name '' is invalid
> 	ok 2 - ref name '/' is invalid
> 	ok 3 - ref name '/' is invalid with options --allow-onelevel
> 	ok 4 - ref name '/' is invalid with options --normalize
> 	error: bug in the test script: not 2 or 3 parameters to test-expect-success
>
> The alleged bug is in this line:
>
> 	invalid_ref NOT_MINGW '/' '--allow-onelevel --normalize'
>
> invalid_ref() constructs a test case description using its last argument,
> but the shell seems to split it up into two pieces if it contains a
> space.  Minimal test case:
>
> 	# on NetBSD with /bin/sh
> 	$ a() { echo $#-$1-$2; }
> 	$ t="x"; a "${t:+$t}"
> 	1-x-
> 	$ t="x y"; a "${t:+$t}"
> 	2-x-y
> 	$ t="x y"; a "${t:+x y}"
> 	1-x y-
>
> 	# and with bash
> 	$ t="x y"; a "${t:+$t}"
> 	1-x y-
> 	$ t="x y"; a "${t:+x y}"
> 	1-x y-
>
> This may be a bug in the shell, but here's a simple workaround: Construct
> the description string first and store it in a variable, and then use
> that to call test_expect_success().

Interesting.  I notice that t0008 added recently to 'pu' has the
same construct.

>
> Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
> ---
>  t/t1402-check-ref-format.sh | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/t/t1402-check-ref-format.sh b/t/t1402-check-ref-format.sh
> index 1ae4d87..1a5a5f3 100755
> --- a/t/t1402-check-ref-format.sh
> +++ b/t/t1402-check-ref-format.sh
> @@ -11,7 +11,8 @@ valid_ref() {
>  		prereq=$1
>  		shift
>  	esac
> -	test_expect_success $prereq "ref name '$1' is valid${2:+ with options $2}" "
> +	desc="ref name '$1' is valid${2:+ with options $2}"
> +	test_expect_success $prereq "$desc" "
>  		git check-ref-format $2 '$1'
>  	"
>  }
> @@ -22,7 +23,8 @@ invalid_ref() {
>  		prereq=$1
>  		shift
>  	esac
> -	test_expect_success $prereq "ref name '$1' is invalid${2:+ with options $2}" "
> +	desc="ref name '$1' is invalid${2:+ with options $2}"
> +	test_expect_success $prereq "$desc" "
>  		test_must_fail git check-ref-format $2 '$1'
>  	"
>  }

Re: [PATCH] t1402: work around shell quoting issue on NetBSD

[René Scharfe]

Am 08.01.2013 21:39, schrieb Junio C Hamano:
> René Scharfe <rene.scharfe@lsrfire.ath.cx> writes:
>> 	# on NetBSD with /bin/sh
>> 	$ a() { echo $#-$1-$2; }
>> 	$ t="x"; a "${t:+$t}"
>> 	1-x-
>> 	$ t="x y"; a "${t:+$t}"
>> 	2-x-y
>> 	$ t="x y"; a "${t:+x y}"
>> 	1-x y-
>>
>> 	# and with bash
>> 	$ t="x y"; a "${t:+$t}"
>> 	1-x y-
>> 	$ t="x y"; a "${t:+x y}"
>> 	1-x y-
>>
>> This may be a bug in the shell, but here's a simple workaround: Construct
>> the description string first and store it in a variable, and then use
>> that to call test_expect_success().
>
> Interesting.  I notice that t0008 added recently to 'pu' has the
> same construct.

A quick check shows that subtests 64-68 and 89-93 of t0008 fail for me 
on Debian (10 in total) and subtests 64 and 89 fail on NetBSD (2 in 
total).  Unlike t1402 they don't report "bug in the test script".

t0008 only uses ${:+} substitution on variables that don't contain 
spaces.  With the test changed to store the description in a variable 
first I still get the same 2 failures.

There must be something else going on here.  The different results are 
interesting, especially the higher number of failures on Debian.

René

Re: [PATCH] t1402: work around shell quoting issue on NetBSD

[Junio C Hamano]

René Scharfe <rene.scharfe@lsrfire.ath.cx> writes:

> A quick check shows that subtests 64-68 and 89-93 of t0008 fail for me
> on Debian (10 in total) and subtests 64 and 89 fail on NetBSD (2 in
> total).  Unlike t1402 they don't report "bug in the test script".
>
> t0008 only uses ${:+} substitution on variables that don't contain
> spaces.  With the test changed to store the description in a variable
> first I still get the same 2 failures.
>
> There must be something else going on here.  The different results are
> interesting, especially the higher number of failures on Debian.

I forgot to mention that some of them seem to be broken under dash
but pass under bash.

Re: [PATCH] t1402: work around shell quoting issue on NetBSD

[Greg Troxel]

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René Scharfe <rene.scharfe@lsrfire.ath.cx> writes:

> invalid_ref() constructs a test case description using its last argument,
> but the shell seems to split it up into two pieces if it contains a
> space.  Minimal test case:

This is indeed a bug in NetBSD's shell, which I reported after finding
this test case problem, and I think someone is working on a fix.  But
because git does not intend to be a shell torture test, if it's possible
to avoid bugs in a reasonable way, I think it's nice to do so.

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Re: [PATCH] t1402: work around shell quoting issue on NetBSD

[Greg Troxel]

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René Scharfe <rene.scharfe@lsrfire.ath.cx> writes:

> The test fails for me on NetBSD 6.0.1 and reports:
>
> 	ok 1 - ref name '' is invalid
> 	ok 2 - ref name '/' is invalid
> 	ok 3 - ref name '/' is invalid with options --allow-onelevel
> 	ok 4 - ref name '/' is invalid with options --normalize
> 	error: bug in the test script: not 2 or 3 parameters to test-expect-success
>
> The alleged bug is in this line:
>
> 	invalid_ref NOT_MINGW '/' '--allow-onelevel --normalize'

The bug in NetBSD's sh has been fixed in -current:

  http://gnats.netbsd.org/47361

and the change will almost certainly make it to the -6 and -5 release
branches.

With the fixed sh:
  414c78c (with the workaround): t1402 passes
  69637e5 (without the workaround): t1402 passes

With the buggy sh,
  414c78c (with the workaround): t1402 passes
  69637e5 (without workaround): t1402 fails

so I can confirm that the workaround is successful on NetBSD 5.

Thanks for addressing this, and sorry I didn't mention it on this list.

Greg



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[PATCH] t0008: avoid brace expansion

[René Scharfe]

Brace expansion is not required by POSIX and not supported by dash nor
NetBSD's sh.  Explicitly list all combinations instead.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
---
 t/t0008-ignores.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh
index 9b0fcd6..0273680 100755
--- a/t/t0008-ignores.sh
+++ b/t/t0008-ignores.sh
@@ -129,8 +129,9 @@ test_expect_success 'setup' '
 		one
 		ignored-*
 	EOF
-	touch {,a/}{not-ignored,ignored-{and-untracked,but-in-index}} &&
-	git add -f {,a/}ignored-but-in-index
+	touch not-ignored ignored-and-untracked ignored-but-in-index &&
+	touch a/not-ignored a/ignored-and-untracked a/ignored-but-in-index &&
+	git add -f ignored-but-in-index a/ignored-but-in-index &&
 	cat <<-\EOF >a/.gitignore &&
 		two*
 		*three
-- 
1.8.0

Re: [PATCH] t0008: avoid brace expansion

[Adam Spiers]

On Wed, Jan 9, 2013 at 11:49 PM, René Scharfe
<rene.scharfe@lsrfire.ath.cx> wrote:
> Brace expansion is not required by POSIX and not supported by dash nor
> NetBSD's sh.  Explicitly list all combinations instead.

Good catch, thanks!

Re: [PATCH] t0008: avoid brace expansion

[Junio C Hamano]

Adam Spiers <git@adamspiers.org> writes:

> On Wed, Jan 9, 2013 at 11:49 PM, René Scharfe
> <rene.scharfe@lsrfire.ath.cx> wrote:
>> Brace expansion is not required by POSIX and not supported by dash nor
>> NetBSD's sh.  Explicitly list all combinations instead.
>
> Good catch, thanks!

Yeah; thanks.

It would also be nice to avoid touch while we are at it, by the way.

Re: [PATCH] t0008: avoid brace expansion

[Adam Spiers]

On Thu, Jan 10, 2013 at 12:18 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Adam Spiers <git@adamspiers.org> writes:
>
>> On Wed, Jan 9, 2013 at 11:49 PM, René Scharfe
>> <rene.scharfe@lsrfire.ath.cx> wrote:
>>> Brace expansion is not required by POSIX and not supported by dash nor
>>> NetBSD's sh.  Explicitly list all combinations instead.
>>
>> Good catch, thanks!
>
> Yeah; thanks.
>
> It would also be nice to avoid touch while we are at it, by the way.

Noted.

Re: [PATCH] t0008: avoid brace expansion

[René Scharfe]

Am 10.01.2013 01:18, schrieb Junio C Hamano:
> Adam Spiers <git@adamspiers.org> writes:
> 
>> On Wed, Jan 9, 2013 at 11:49 PM, René Scharfe
>> <rene.scharfe@lsrfire.ath.cx> wrote:
>>> Brace expansion is not required by POSIX and not supported by dash nor
>>> NetBSD's sh.  Explicitly list all combinations instead.
>>
>> Good catch, thanks!
> 
> Yeah; thanks.
> 
> It would also be nice to avoid touch while we are at it, by the way.

Good idea!  Replacement patch:

--- >8 ---
Brace expansion is a shell feature that's not required by POSIX and not
supported by dash nor NetBSD's sh.  Explicitly list all combinations
instead.  Also avoid calling touch by creating the test files with a
redirection instead, as suggested by Junio.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
---
 t/t0008-ignores.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh
index 9b0fcd6..d7df719 100755
--- a/t/t0008-ignores.sh
+++ b/t/t0008-ignores.sh
@@ -129,8 +129,13 @@ test_expect_success 'setup' '
 		one
 		ignored-*
 	EOF
-	touch {,a/}{not-ignored,ignored-{and-untracked,but-in-index}} &&
-	git add -f {,a/}ignored-but-in-index
+	for dir in . a
+	do
+		: >$dir/not-ignored &&
+		: >$dir/ignored-and-untracked &&
+		: >$dir/ignored-but-in-index
+	done &&
+	git add -f ignored-but-in-index a/ignored-but-in-index &&
 	cat <<-\EOF >a/.gitignore &&
 		two*
 		*three
-- 
1.8.0