The rot13-filter.pl script hardcodes "#!/usr/bin/perl", and
does not respect $PERL_PATH at all. That is a problem if the
system does not have perl at that path, or if it has a perl
that is too old to run a complicated script like the
rot13-filter (but PERL_PATH points to a more modern one).

We can fix this by using write_script() to create a new copy
of the script with the correct #!-line. In theory we could
move the whole script inside t0021-conversion.sh rather than
having it as an auxiliary file, but it's long enough that
it just makes things harder to read.

As a bonus, we can stop using the full path to the script in
the filter-process config we add (because the trash
directory is in our PATH). Not only is this shorter, but it
sidesteps any shell-quoting issues. The original was broken
when $TEST_DIRECTORY contained a space, because it was
interpolated in the outer script.

Signed-off-by: Jeff King <p...@peff.net>
---
 t/t0021-conversion.sh   | 19 +++++++++++--------
 t/t0021/rot13-filter.pl |  1 -
 2 files changed, 11 insertions(+), 9 deletions(-)
 mode change 100755 => 100644 t/t0021/rot13-filter.pl

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index c1ad20c61..a8fa52148 100755
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -13,6 +13,9 @@ tr \
   'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
 EOF
 
+write_script rot13-filter.pl "$PERL_PATH" \
+       <"$TEST_DIRECTORY"/t0021/rot13-filter.pl
+
 generate_random_characters () {
        LEN=$1
        NAME=$2
@@ -341,7 +344,7 @@ test_expect_success 'diff does not reuse worktree files 
that need cleaning' '
 '
 
 test_expect_success PERL 'required process filter should filter data' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        test_config_global filter.protocol.required true &&
        rm -rf repo &&
        mkdir repo &&
@@ -434,7 +437,7 @@ test_expect_success PERL 'required process filter should 
filter data' '
 
 test_expect_success PERL 'required process filter takes precedence' '
        test_config_global filter.protocol.clean false &&
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean" &&
        test_config_global filter.protocol.required true &&
        rm -rf repo &&
        mkdir repo &&
@@ -459,7 +462,7 @@ test_expect_success PERL 'required process filter takes 
precedence' '
 '
 
 test_expect_success PERL 'required process filter should be used only for 
"clean" operation only' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean" &&
        rm -rf repo &&
        mkdir repo &&
        (
@@ -494,7 +497,7 @@ test_expect_success PERL 'required process filter should be 
used only for "clean
 '
 
 test_expect_success PERL 'required process filter should process multiple 
packets' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        test_config_global filter.protocol.required true &&
 
        rm -rf repo &&
@@ -554,7 +557,7 @@ test_expect_success PERL 'required process filter should 
process multiple packet
 '
 
 test_expect_success PERL 'required process filter with clean error should 
fail' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        test_config_global filter.protocol.required true &&
        rm -rf repo &&
        mkdir repo &&
@@ -573,7 +576,7 @@ test_expect_success PERL 'required process filter with 
clean error should fail'
 '
 
 test_expect_success PERL 'process filter should restart after unexpected write 
failure' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        rm -rf repo &&
        mkdir repo &&
        (
@@ -624,7 +627,7 @@ test_expect_success PERL 'process filter should restart 
after unexpected write f
 '
 
 test_expect_success PERL 'process filter should not be restarted if it signals 
an error' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        rm -rf repo &&
        mkdir repo &&
        (
@@ -663,7 +666,7 @@ test_expect_success PERL 'process filter should not be 
restarted if it signals a
 '
 
 test_expect_success PERL 'process filter abort stops processing of all further 
files' '
-       test_config_global filter.protocol.process 
"$TEST_DIRECTORY/t0021/rot13-filter.pl clean smudge" &&
+       test_config_global filter.protocol.process "rot13-filter.pl clean 
smudge" &&
        rm -rf repo &&
        mkdir repo &&
        (
diff --git a/t/t0021/rot13-filter.pl b/t/t0021/rot13-filter.pl
old mode 100755
new mode 100644
index ae4c50f5c..e3ea58e1e
--- a/t/t0021/rot13-filter.pl
+++ b/t/t0021/rot13-filter.pl
@@ -1,4 +1,3 @@
-#!/usr/bin/perl
 #
 # Example implementation for the Git filter protocol version 2
 # See Documentation/gitattributes.txt, section "Filter Protocol"
-- 
2.11.0.rc0.258.gf434c15

Reply via email to