tests: fix spurious failures due to dpkg install-info

* t/install-info-dir.sh: Skip some checks if 'install-info' is the one
from dpkg, not the one from GNU info; the former might try to create
files in '/var/backups/', causing spurious failures like this for any
non-root user:

    install-info(.../install-info-dir.dir/_inst/info/foo.info): \
      creating new section `Dummy utilities'
    cp: cannot create regular file `/var/backups/infodir.bak': \
      Permission denied
    install-info(.../install-info-dir.dir/_inst/info/foo.info): \
      could not backup .../install-info-dir.dir/_inst/info/dir in \
      /var/backups/infodir.bak: No such file or directory

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/t/install-info-dir.sh b/t/install-info-dir.sh
index d8b32d8..12b2293 100755 (executable)
--- a/t/install-info-dir.sh
+++ b/t/install-info-dir.sh
@@ -67,7 +67,15 @@ $MAKE info
 test -f foo.info
 
 if install-info --version; then
-  have_installinfo=yes
+  # Skip some checks even if 'install-info' is the one from dpkg, not
+  # the one from GNU info, as the former might try to create files in
+  # '/var/backups/', causing spurious failures like this for non-root
+  # users.
+  if install-info --version | $EGREP -i '(dpkg|debian) install-info'; then
+    have_installinfo=no
+  else
+    have_installinfo=yes
+  fi
 else
   have_installinfo=no
 fi