[PATCH 6/6] t5000: test long filenames

From: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Date: May 20, 2013, 09:58 UTC
Message-ID: <1369043909-59207-7-git-send-email-rene.scharfe@lsrfire.ath.cx>
In-Reply-To: <1369043909-59207-1-git-send-email-rene.scharfe@lsrfire.ath.cx>

Add a file with a long name to the test archive in order to check entries with pax extended headers. Also add a check for tar versions that doen't understand this format. Those versions should extract the headers as a regular files. Add code to check_tar() to interpret the path header if present, so that our tests work even with those tar versions.

It's important to use the fallback code only if needed to still be able to detect git archive errorously creating pax headers as regular file entries (with a suitable tar version, of course).

The archive used to check for pax header support in tar was generated using GNU tar 1.26 and its option --format=pax.

Tested successfully on NetBSD 6.1, which has a tar version lacking pax header support.

Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx>
---
 t/t5000-tar-tree.sh |  46 ++++++++++++++++++++++++++++++++++++++++++++++
 t/t5000/pax.tar     | Bin 0 -> 10240 bytes
 2 files changed, 46 insertions(+)
 create mode 100644 t/t5000/pax.tar

diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index a1f35d2..c2023b1 100755
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -30,6 +30,32 @@ GUNZIP=${GUNZIP:-gzip -d}
 
 SUBSTFORMAT=%H%n
 
+test_lazy_prereq TAR_NEEDS_PAX_FALLBACK '
+	(
+		mkdir pax &&
+		cd pax &&
+		"$TAR" xf "$TEST_DIRECTORY"/t5000/pax.tar &&
+		test -f PaxHeaders.1791/file
+	)
+'
+
+get_pax_header() {
+	file=$1
+	header=$2=
+
+	while read len rest
+	do
+		if test "$len" = $(echo "$len $rest" | wc -c)
+		then
+			case "$rest" in
+			$header*)
+				echo "${rest#$header}"
+				;;
+			esac
+		fi
+	done <"$file"
+}
+
 check_tar() {
 	tarfile=$1.tar
 	listfile=$1.lst
@@ -40,6 +66,24 @@ check_tar() {
 		(mkdir $dir && cd $dir && "$TAR" xf -) <$tarfile
 	'
 
+	test_expect_success TAR_NEEDS_PAX_FALLBACK ' interpret pax headers' '
+		(
+			cd $dir &&
+			for header in *.paxheader
+			do
+				data=${header%.paxheader}.data &&
+				if test -h $data -o -e $data
+				then
+					path=$(get_pax_header $header path) &&
+					if test -n "$path"
+					then
+						mv "$data" "$path"
+					fi
+				fi
+			done
+		)
+	'
+
 	test_expect_success ' validate filenames' '
 		(cd ${dir_with_prefix}a && find .) | sort >$listfile &&
 		test_cmp a.lst $listfile
@@ -54,6 +98,8 @@ test_expect_success \
     'populate workdir' \
     'mkdir a &&
      echo simple textfile >a/a &&
+     ten=0123456789 && hundred=$ten$ten$ten$ten$ten$ten$ten$ten$ten$ten &&
+     echo long filename >a/four$hundred &&
      mkdir a/bin &&
      cp /bin/sh a/bin &&
      printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile1 &&
diff --git a/t/t5000/pax.tar b/t/t5000/pax.tar
new file mode 100644
index 0000000000000000000000000000000000000000..d91173714991fded560fcd6a8aaec6aa6ec7f5e8
GIT binary patch
literal 10240
zcmeIy%?g4*5Ww+0_Y^*X&3@?Sp?k+(L29F*2+YXGPl*s(6d@sk|6W#S)Sdakm@c<v
zvkB!sRJT<7LN5=eb5OG`X;<!?>h^Yh?xL+x+Gv-HHCB5i+IVkN(#%@Lz{l>lx~$rg
z2GWzmuipCRCcpUG2dyNR`g93vZSz%O3b*p9Sn-k>pDo&KIhx%KXMfulr%w}@f7;`7
zyU`e%|L&jgG5=zmO1_@SxRf~Zp8x84t>bJTc^pGH_qWm2pU!{O2LS{SKmY**5I_I{
l1Q0*~0R#|0009ILKmY**5I_I{1Q0*~0R#|00D->}cmml}KZ5`O

literal 0
HcmV?d00001

-- 
1.8.2.3