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t9300: use perl "head -c" clone in place of "dd bs=1 count=16000" kluge

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It is unfortunate to have to issue thousands of one-byte read calls to
work around dd's refusal to buffer input that would fill a block after
a short read (a3a6f4, 2010-12-13).  We could do better by using
"head -c", if it were available on all platforms we cared about.
Replace it with some simple perl.

While doing so, restructure 9300.114 to use a subshell instead of a
script.  Subshells can inherit functions (like the new head_c) from
the parent shell while external scripts cannot.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-12-13 03:28:05 -06:00 committed by Junio C Hamano
parent 834d9eb6b7
commit 4de0bbd898
1 changed files with 49 additions and 35 deletions
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84
t/t9300-fast-import.sh
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@ -7,6 +7,23 @@ test_description='test git fast-import utility'
. ./test-lib.sh
. "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
# Print $1 bytes from stdin to stdout.
#
# This could be written as "head -c $1", but IRIX "head" does not
# support the -c option.
head_c () {
perl -e '
my $len = $ARGV[1];
while ($len > 0) {
my $s;
my $nread = sysread(STDIN, $s, $len);
die "cannot read: $!" unless defined($nread);
print $s;
$len -= $nread;
}
' - "$1"
}
file2_data='file2
second line of EOF'
@ -1888,44 +1905,41 @@ test_expect_success PIPE 'R: copy using cat-file' '
rm -f blobs &&
cat >frontend <<-\FRONTEND_END &&
#!/bin/sh
cat <<EOF &&
feature cat-blob
blob
mark :1
data <<BLOB
EOF
cat big
cat <<EOF
BLOB
cat-blob :1
EOF
read blob_id type size <&3 &&
echo "$blob_id $type $size" >response &&
dd of=blob bs=1 count=$size <&3 &&
read newline <&3 &&
cat <<EOF &&
commit refs/heads/copied
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
copy big file as file3
COMMIT
M 644 inline file3
data <<BLOB
EOF
cat blob &&
cat <<EOF
BLOB
EOF
FRONTEND_END
mkfifo blobs &&
(
export GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_COMMITTER_DATE &&
sh frontend 3<blobs |
git fast-import --cat-blob-fd=3 3>blobs
) &&
cat <<-\EOF &&
feature cat-blob
blob
mark :1
data <<BLOB
EOF
cat big &&
cat <<-\EOF &&
BLOB
cat-blob :1
EOF
read blob_id type size <&3 &&
echo "$blob_id $type $size" >response &&
head_c $size >blob <&3 &&
read newline <&3 &&
cat <<-EOF &&
commit refs/heads/copied
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
copy big file as file3
COMMIT
M 644 inline file3
data <<BLOB
EOF
cat blob &&
echo BLOB
) 3<blobs |
git fast-import --cat-blob-fd=3 3>blobs &&
git show copied:file3 >actual &&
test_cmp expect.response response &&
test_cmp big actual
@ -1953,7 +1967,7 @@ test_expect_success PIPE 'R: print blob mid-commit' '
EOF
read blob_id type size <&3 &&
dd of=actual bs=1 count=$size <&3 &&
head_c $size >actual <&3 &&
read newline <&3 &&
echo
@ -1988,7 +2002,7 @@ test_expect_success PIPE 'R: print staged blob within commit' '
echo "cat-blob $to_get" &&
read blob_id type size <&3 &&
dd of=actual bs=1 count=$size <&3 &&
head_c $size >actual <&3 &&
read newline <&3 &&
echo deleteall