git/t/t4062-diff-pickaxe.sh
Johannes Schindelin b7d36ffca0 regex: use regexec_buf()
The new regexec_buf() function operates on buffers with an explicitly
specified length, rather than NUL-terminated strings.

We need to use this function whenever the buffer we want to pass to
regexec(3) may have been mmap(2)ed (and is hence not NUL-terminated).

Note: the original motivation for this patch was to fix a bug where
`git diff -G <regex>` would crash. This patch converts more callers,
though, some of which allocated to construct NUL-terminated strings,
or worse, modified buffers to temporarily insert NULs while calling
regexec(3).  By converting them to use regexec_buf(), the code has
become much cleaner.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-21 13:56:15 -07:00

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#!/bin/sh
#
# Copyright (c) 2016 Johannes Schindelin
#
test_description='Pickaxe options'
. ./test-lib.sh
test_expect_success setup '
test_commit initial &&
printf "%04096d" 0 >4096-zeroes.txt &&
git add 4096-zeroes.txt &&
test_tick &&
git commit -m "A 4k file"
'
test_expect_success '-G matches' '
git diff --name-only -G "^0{4096}$" HEAD^ >out &&
test 4096-zeroes.txt = "$(cat out)"
'
test_done