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git/t/t4019-diff-wserror.sh
Junio C Hamano eca4460eeb t4019 "grep" portability fix
Input to "grep" is supposed to be "text", but we deliberately feed output
from "git diff --color" to sift it into two sets of lines (ones with
errors, the other without).  Some implementations of "grep" only report
matches with the exit status, without showing the matched lines in their
output (e.g. OpenBSD 4.6, which says "Binary file .. matches").

Fortunately, "grep -a" is often a way to force the command to treat its
input as text.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 13:59:34 -08:00

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#!/bin/sh
test_description='diff whitespace error detection'
. ./test-lib.sh
test_expect_success setup '
git config diff.color.whitespace "blue reverse" &&
>F &&
git add F &&
echo " Eight SP indent" >>F &&
echo " HT and SP indent" >>F &&
echo "With trailing SP " >>F &&
echo "Carriage ReturnQ" | tr Q "\015" >>F &&
echo "No problem" >>F &&
echo >>F
'
blue_grep='7;34m' ;# ESC [ 7 ; 3 4 m
printf "\033[%s" "$blue_grep" >check-grep
if (grep "$blue_grep" <check-grep | grep "$blue_grep") >/dev/null 2>&1
then
grep_a=grep
elif (grep -a "$blue_grep" <check-grep | grep -a "$blue_grep") >/dev/null 2>&1
then
grep_a='grep -a'
else
grep_a=grep ;# expected to fail...
fi
rm -f check-grep
prepare_output () {
git diff --color >output
$grep_a "$blue_grep" output >error
$grep_a -v "$blue_grep" output >normal
}
test_expect_success default '
prepare_output
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -trail' '
git config core.whitespace -trail
prepare_output
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -trail (attribute)' '
git config --unset core.whitespace
echo "F whitespace=-trail" >.gitattributes
prepare_output
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -space' '
rm -f .gitattributes
git config core.whitespace -space
prepare_output
grep Eight normal >/dev/null &&
grep HT normal >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'without -space (attribute)' '
git config --unset core.whitespace
echo "F whitespace=-space" >.gitattributes
prepare_output
grep Eight normal >/dev/null &&
grep HT normal >/dev/null &&
grep With error >/dev/null &&
grep Return error >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with indent-non-tab only' '
rm -f .gitattributes
git config core.whitespace indent,-trailing,-space
prepare_output
grep Eight error >/dev/null &&
grep HT normal >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with indent-non-tab only (attribute)' '
git config --unset core.whitespace
echo "F whitespace=indent,-trailing,-space" >.gitattributes
prepare_output
grep Eight error >/dev/null &&
grep HT normal >/dev/null &&
grep With normal >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with cr-at-eol' '
rm -f .gitattributes
git config core.whitespace cr-at-eol
prepare_output
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'with cr-at-eol (attribute)' '
git config --unset core.whitespace
echo "F whitespace=trailing,cr-at-eol" >.gitattributes
prepare_output
grep Eight normal >/dev/null &&
grep HT error >/dev/null &&
grep With error >/dev/null &&
grep Return normal >/dev/null &&
grep No normal >/dev/null
'
test_expect_success 'trailing empty lines (1)' '
rm -f .gitattributes &&
test_must_fail git diff --check >output &&
grep "new blank line at" output &&
grep "trailing whitespace" output
'
test_expect_success 'trailing empty lines (2)' '
echo "F -whitespace" >.gitattributes &&
git diff --check >output &&
! test -s output
'
test_expect_success 'do not color trailing cr in context' '
git config --unset core.whitespace
rm -f .gitattributes &&
echo AAAQ | tr Q "\015" >G &&
git add G &&
echo BBBQ | tr Q "\015" >>G
git diff --color G | tr "\015" Q >output &&
grep "BBB.*${blue_grep}Q" output &&
grep "AAA.*\[mQ" output
'
test_expect_success 'color new trailing blank lines' '
{ echo a; echo b; echo; echo; } >x &&
git add x &&
{ echo a; echo; echo; echo; echo c; echo; echo; echo; echo; } >x &&
git diff --color x >output &&
cnt=$($grep_a "${blue_grep}" output | wc -l) &&
test $cnt = 2
'
test_done