[PATCH] Avoid difference in tr semantics between System V and BSD
- From
Ben Walton <bdwalton@gmail.com>
- Date
- Oct 28, 2013, 21:43 UTC
- Message-ID
- <1382996580-19031-1-git-send-email-bdwalton@gmail.com>
- In-Reply-To
- <xmqqiowhdqx8.fsf@gitster.dls.corp.google.com>
Solaris' tr (both /usr/bin/ and /usr/xpg4/bin) uses the System V semantics for tr whereby string1's length is truncated to the length of string2 if string2 is shorter. The BSD semantics, as used by GNU tr see string2 padded to the length of string1 using the final character in string2. POSIX explicitly doesn't specify the correct behavior here, making both equally valid.
This difference means that Solaris' native tr implementations produce different results for tr ":\t\n" "\0" than GNU tr. This breaks a few tests in t0008-ignores.sh.
Possible fixes for this are to make string2 be "\0\0\0" or "[\0*]".
Instead, use perl to perform these transliterations which means we don't need to worry about the difference at all. Since we're replacing tr with perl, we also use perl to replace the sed invocations used to transform the files.
Replace four identical transforms with a function named broken_c_unquote. Replace the other two identical transforms with a fuction named broken_c_unquote_verbose.
Signed-off-by: Ben Walton <bdwalton@gmail.com> ---
...Forgot to quote PERL_PATH in the previous iteration.
t/t0008-ignores.sh | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh index 181513a..b4d98e6 100755 --- a/t/t0008-ignores.sh +++ b/t/t0008-ignores.sh @@ -37,6 +37,14 @@ test_stderr () { test_cmp "$HOME/expected-stderr" "$HOME/stderr" } +broken_c_unquote () { + "$PERL_PATH" -pe 's/^"//; s/\\//; s/"$//; tr/\n/\0/' "$@" +} + +broken_c_unquote_verbose () { + "$PERL_PATH" -pe 's/ "/ /; s/\\//; s/"$//; tr/:\t\n/\0/' "$@" +} + stderr_contains () { regexp="$1" if grep "$regexp" "$HOME/stderr" @@ -606,12 +614,11 @@ cat <<-EOF >expected-verbose $global_excludes:2:!globaltwo b/globaltwo EOF -sed -e 's/^"//' -e 's/\\//' -e 's/"$//' stdin | \ - tr "\n" "\0" >stdin0 -sed -e 's/^"//' -e 's/\\//' -e 's/"$//' expected-default | \ - tr "\n" "\0" >expected-default0 -sed -e 's/ "/ /' -e 's/\\//' -e 's/"$//' expected-verbose | \ - tr ":\t\n" "\0" >expected-verbose0 +broken_c_unquote stdin >stdin0 + +broken_c_unquote expected-default >expected-default0 + +broken_c_unquote_verbose expected-verbose >expected-verbose0 test_expect_success '--stdin' ' expect_from_stdin <expected-default && @@ -692,12 +699,11 @@ EOF grep -v '^:: ' expected-all >expected-verbose sed -e 's/.* //' expected-verbose >expected-default -sed -e 's/^"//' -e 's/\\//' -e 's/"$//' stdin | \ - tr "\n" "\0" >stdin0 -sed -e 's/^"//' -e 's/\\//' -e 's/"$//' expected-default | \ - tr "\n" "\0" >expected-default0 -sed -e 's/ "/ /' -e 's/\\//' -e 's/"$//' expected-verbose | \ - tr ":\t\n" "\0" >expected-verbose0 +broken_c_unquote stdin >stdin0 + +broken_c_unquote expected-default >expected-default0 + +broken_c_unquote_verbose expected-verbose >expected-verbose0 test_expect_success '--stdin from subdirectory' ' expect_from_stdin <expected-default &&
-- 1.8.1.2