test: avoid pipes in git related commands for test

Avoid using pipes downstream of Git commands since the exit codes
of commands upstream of pipes get swallowed, thus potentially
hiding failure of those commands. Instead, capture Git command
output to a file and apply the downstream command(s) to that file.

Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t9110-git-svn-use-svm-props.sh b/t/t9110-git-svn-use-svm-props.sh
index dde0a3c..ad37d98 100755
--- a/t/t9110-git-svn-use-svm-props.sh
+++ b/t/t9110-git-svn-use-svm-props.sh
@@ -21,37 +21,37 @@
 
 bar_url=http://mayonaise/svnrepo/bar
 test_expect_success 'verify metadata for /bar' "
-	git cat-file commit refs/remotes/bar | \
-	   grep '^git-svn-id: $bar_url@12 $uuid$' &&
-	git cat-file commit refs/remotes/bar~1 | \
-	   grep '^git-svn-id: $bar_url@11 $uuid$' &&
-	git cat-file commit refs/remotes/bar~2 | \
-	   grep '^git-svn-id: $bar_url@10 $uuid$' &&
-	git cat-file commit refs/remotes/bar~3 | \
-	   grep '^git-svn-id: $bar_url@9 $uuid$' &&
-	git cat-file commit refs/remotes/bar~4 | \
-	   grep '^git-svn-id: $bar_url@6 $uuid$' &&
-	git cat-file commit refs/remotes/bar~5 | \
-	   grep '^git-svn-id: $bar_url@1 $uuid$'
+	git cat-file commit refs/remotes/bar >actual &&
+	grep '^git-svn-id: $bar_url@12 $uuid$' actual &&
+	git cat-file commit refs/remotes/bar~1 >actual &&
+	grep '^git-svn-id: $bar_url@11 $uuid$' actual &&
+	git cat-file commit refs/remotes/bar~2 >actual &&
+	grep '^git-svn-id: $bar_url@10 $uuid$' actual &&
+	git cat-file commit refs/remotes/bar~3 >actual &&
+	grep '^git-svn-id: $bar_url@9 $uuid$' actual &&
+	git cat-file commit refs/remotes/bar~4 >actual &&
+	grep '^git-svn-id: $bar_url@6 $uuid$' actual &&
+	git cat-file commit refs/remotes/bar~5 >actual &&
+	grep '^git-svn-id: $bar_url@1 $uuid$' actual
 	"
 
 e_url=http://mayonaise/svnrepo/dir/a/b/c/d/e
 test_expect_success 'verify metadata for /dir/a/b/c/d/e' "
-	git cat-file commit refs/remotes/e | \
-	   grep '^git-svn-id: $e_url@1 $uuid$'
+	git cat-file commit refs/remotes/e >actual &&
+	grep '^git-svn-id: $e_url@1 $uuid$' actual
 	"
 
 dir_url=http://mayonaise/svnrepo/dir
 test_expect_success 'verify metadata for /dir' "
-	git cat-file commit refs/remotes/dir | \
-	   grep '^git-svn-id: $dir_url@2 $uuid$' &&
-	git cat-file commit refs/remotes/dir~1 | \
-	   grep '^git-svn-id: $dir_url@1 $uuid$'
+	git cat-file commit refs/remotes/dir >actual &&
+	grep '^git-svn-id: $dir_url@2 $uuid$' actual &&
+	git cat-file commit refs/remotes/dir~1 >actual &&
+	grep '^git-svn-id: $dir_url@1 $uuid$' actual
 	"
 
 test_expect_success 'find commit based on SVN revision number' "
-        git svn find-rev r12 |
-	    grep $(git rev-parse HEAD)
+	git svn find-rev r12 >actual &&
+	grep $(git rev-parse HEAD) actual
         "
 
 test_expect_success 'empty rebase' "