[PATCH] Fail softly if file system does not like test data.

[Robin Rosenberg <robin.rosenberg@dewire.com>]

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Most unix file system allow almost any byte sequence, but other may reject
sequences that are not valid according to the locale. This change makes
failure somewhat less likely by using UTF-8-encoded characters (which
happen to be valid interpreted as ISO-8859-1 and skips the test if the 
local file system does not support the test data.

Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
---

Please try this on cygwin (western iso-8859-X, korean on FAT & NTFS) and 
MacOSX (HFS) where we know there was a problem. The non-ascii filename
test should be skipped, with a notice) in most asian locales on Windows
and MacOSX.

 t/t9200-git-cvsexportcommit.sh |   35 +++++++++++++++++++++--------------
 1 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/t/t9200-git-cvsexportcommit.sh b/t/t9200-git-cvsexportcommit.sh
index fd0a554..fdf7b3f 100755
--- a/t/t9200-git-cvsexportcommit.sh
+++ b/t/t9200-git-cvsexportcommit.sh
@@ -169,20 +169,27 @@ test_expect_success \
       test "$(echo $(sort "G g/CVS/Entries"|cut -d/ -f2,3,5))" = "with spaces.png/1.2/-kb with spaces.txt/1.2/"
       )'
 
-# This test contains ISO-8859-1 characters
-test_expect_success \
-     'File with non-ascii file name' \
-     'mkdir -p Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö &&
-      echo Foo >Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.txt &&
-      git add Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.txt &&
-      cp ../test9200a.png Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.png &&
-      git add Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.png &&
-      git commit -a -m "Går det så går det" && \
-      id=$(git rev-list --max-count=1 HEAD) &&
-      (cd "$CVSWORK" &&
-      git-cvsexportcommit -v -c $id &&
-      test "$(echo $(sort Å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/CVS/Entries|cut -d/ -f2,3,5))" = "gårdetsågårdet.png/1.1/-kb gårdetsågårdet.txt/1.1/"
-      )'
+# This test contains UTF-8 characters and may fail on some filesystems
+mkdir -p "/å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö" >/dev/null 2>&1
+if test $? -ne 0
+then
+    test_expect_success 'File with non-ascii file name skipped, file system is incompatible with test data' :
+else
+    test_expect_success \
+	'File with non-ascii file name' \
+	'(mkdir -p "å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö" ||
+         echo "Local filesystem does not permit this test" ) &&
+         echo Foo >"å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.txt" &&
+         git add "å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.txt" &&
+         cp ../test9200a.png "å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.png" &&
+         git add "å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/gårdetsågårdet.png" &&
+         git commit -a -m "Går det så går det" && \
+         id=$(git rev-list --max-count=1 HEAD) &&
+         (cd "$CVSWORK" &&
+         git-cvsexportcommit -v -c $id &&
+         test "$(echo $(sort "å/goo/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/å/ä/ö/CVS/Entries"|cut -d/ -f2,3,5))" = "gårdetsågårdet.png/1.1/-kb gårdetsågårdet.txt/1.1/"
+         )'
+fi
 
 test_expect_success \
      'Mismatching patch should fail' \