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git/t/t1007-hash-object.sh
Jeff King a1be47e4ca hash-object: fix buffer reuse with --path in a subdirectory
The hash-object command uses prefix_filename() without
duplicating its return value. Since that function returns a
static buffer, the value is overwritten by subsequent calls.

This can cause incorrect results when we use --path along
with hashing a file by its relative path, both of which need
to call prefix_filename(). We overwrite the filename
computed for --path, effectively ignoring it.

We can fix this by calling xstrdup on the return value. Note
that we don't bother freeing the "vpath" instance, as it
remains valid until the program exit.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-21 11:12:52 -07:00

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#!/bin/sh
test_description="git hash-object"
. ./test-lib.sh
echo_without_newline() {
printf '%s' "$*"
}
test_blob_does_not_exist() {
test_expect_success 'blob does not exist in database' "
test_must_fail git cat-file blob $1
"
}
test_blob_exists() {
test_expect_success 'blob exists in database' "
git cat-file blob $1
"
}
hello_content="Hello World"
hello_sha1=5e1c309dae7f45e0f39b1bf3ac3cd9db12e7d689
example_content="This is an example"
example_sha1=ddd3f836d3e3fbb7ae289aa9ae83536f76956399
setup_repo() {
echo_without_newline "$hello_content" > hello
echo_without_newline "$example_content" > example
}
test_repo=test
push_repo() {
test_create_repo $test_repo
cd $test_repo
setup_repo
}
pop_repo() {
cd ..
rm -rf $test_repo
}
setup_repo
# Argument checking
test_expect_success "multiple '--stdin's are rejected" '
echo example | test_must_fail git hash-object --stdin --stdin
'
test_expect_success "Can't use --stdin and --stdin-paths together" '
echo example | test_must_fail git hash-object --stdin --stdin-paths &&
echo example | test_must_fail git hash-object --stdin-paths --stdin
'
test_expect_success "Can't pass filenames as arguments with --stdin-paths" '
echo example | test_must_fail git hash-object --stdin-paths hello
'
test_expect_success "Can't use --path with --stdin-paths" '
echo example | test_must_fail git hash-object --stdin-paths --path=foo
'
test_expect_success "Can't use --path with --no-filters" '
test_must_fail git hash-object --no-filters --path=foo
'
# Behavior
push_repo
test_expect_success 'hash a file' '
test $hello_sha1 = $(git hash-object hello)
'
test_blob_does_not_exist $hello_sha1
test_expect_success 'hash from stdin' '
test $example_sha1 = $(git hash-object --stdin < example)
'
test_blob_does_not_exist $example_sha1
test_expect_success 'hash a file and write to database' '
test $hello_sha1 = $(git hash-object -w hello)
'
test_blob_exists $hello_sha1
test_expect_success 'git hash-object --stdin file1 <file0 first operates on file0, then file1' '
echo foo > file1 &&
obname0=$(echo bar | git hash-object --stdin) &&
obname1=$(git hash-object file1) &&
obname0new=$(echo bar | git hash-object --stdin file1 | sed -n -e 1p) &&
obname1new=$(echo bar | git hash-object --stdin file1 | sed -n -e 2p) &&
test "$obname0" = "$obname0new" &&
test "$obname1" = "$obname1new"
'
test_expect_success 'set up crlf tests' '
echo fooQ | tr Q "\\015" >file0 &&
cp file0 file1 &&
echo "file0 -crlf" >.gitattributes &&
echo "file1 crlf" >>.gitattributes &&
git config core.autocrlf true &&
file0_sha=$(git hash-object file0) &&
file1_sha=$(git hash-object file1) &&
test "$file0_sha" != "$file1_sha"
'
test_expect_success 'check that appropriate filter is invoke when --path is used' '
path1_sha=$(git hash-object --path=file1 file0) &&
path0_sha=$(git hash-object --path=file0 file1) &&
test "$file0_sha" = "$path0_sha" &&
test "$file1_sha" = "$path1_sha" &&
path1_sha=$(cat file0 | git hash-object --path=file1 --stdin) &&
path0_sha=$(cat file1 | git hash-object --path=file0 --stdin) &&
test "$file0_sha" = "$path0_sha" &&
test "$file1_sha" = "$path1_sha"
'
test_expect_success 'gitattributes also work in a subdirectory' '
mkdir subdir &&
(
cd subdir &&
subdir_sha0=$(git hash-object ../file0) &&
subdir_sha1=$(git hash-object ../file1) &&
test "$file0_sha" = "$subdir_sha0" &&
test "$file1_sha" = "$subdir_sha1"
)
'
test_expect_success '--path works in a subdirectory' '
(
cd subdir &&
path1_sha=$(git hash-object --path=../file1 ../file0) &&
path0_sha=$(git hash-object --path=../file0 ../file1) &&
test "$file0_sha" = "$path0_sha" &&
test "$file1_sha" = "$path1_sha"
)
'
test_expect_success 'check that --no-filters option works' '
nofilters_file1=$(git hash-object --no-filters file1) &&
test "$file0_sha" = "$nofilters_file1" &&
nofilters_file1=$(cat file1 | git hash-object --stdin) &&
test "$file0_sha" = "$nofilters_file1"
'
test_expect_success 'check that --no-filters option works with --stdin-paths' '
nofilters_file1=$(echo "file1" | git hash-object --stdin-paths --no-filters) &&
test "$file0_sha" = "$nofilters_file1"
'
pop_repo
for args in "-w --stdin" "--stdin -w"; do
push_repo
test_expect_success "hash from stdin and write to database ($args)" '
test $example_sha1 = $(git hash-object $args < example)
'
test_blob_exists $example_sha1
pop_repo
done
filenames="hello
example"
sha1s="$hello_sha1
$example_sha1"
test_expect_success "hash two files with names on stdin" '
test "$sha1s" = "$(echo_without_newline "$filenames" | git hash-object --stdin-paths)"
'
for args in "-w --stdin-paths" "--stdin-paths -w"; do
push_repo
test_expect_success "hash two files with names on stdin and write to database ($args)" '
test "$sha1s" = "$(echo_without_newline "$filenames" | git hash-object $args)"
'
test_blob_exists $hello_sha1
test_blob_exists $example_sha1
pop_repo
done
test_expect_success 'too-short tree' '
echo abc >malformed-tree &&
test_must_fail git hash-object -t tree malformed-tree 2>err &&
test_i18ngrep "too-short tree object" err
'
hex2oct() {
perl -ne 'printf "\\%03o", hex for /../g'
}
test_expect_success 'malformed mode in tree' '
hex_sha1=$(echo foo | git hash-object --stdin -w) &&
bin_sha1=$(echo $hex_sha1 | hex2oct) &&
printf "9100644 \0$bin_sha1" >tree-with-malformed-mode &&
test_must_fail git hash-object -t tree tree-with-malformed-mode 2>err &&
test_i18ngrep "malformed mode in tree entry" err
'
test_expect_success 'empty filename in tree' '
hex_sha1=$(echo foo | git hash-object --stdin -w) &&
bin_sha1=$(echo $hex_sha1 | hex2oct) &&
printf "100644 \0$bin_sha1" >tree-with-empty-filename &&
test_must_fail git hash-object -t tree tree-with-empty-filename 2>err &&
test_i18ngrep "empty filename in tree entry" err
'
test_expect_success 'corrupt commit' '
test_must_fail git hash-object -t commit --stdin </dev/null
'
test_expect_success 'corrupt tag' '
test_must_fail git hash-object -t tag --stdin </dev/null
'
test_expect_success 'hash-object complains about bogus type name' '
test_must_fail git hash-object -t bogus --stdin </dev/null
'
test_expect_success 'hash-object complains about truncated type name' '
test_must_fail git hash-object -t bl --stdin </dev/null
'
test_expect_success '--literally' '
t=1234567890 &&
echo example | git hash-object -t $t --literally --stdin
'
test_expect_success '--literally with extra-long type' '
t=12345678901234567890123456789012345678901234567890 &&
t="$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t$t" &&
echo example | git hash-object -t $t --literally --stdin
'
test_done