By using the once_had_no_optargs flag, this change is backwards
compatible for callers (except Haskell, PHP and GObject as discussed
in earlier commit).

No functional change.

This option, when added via
  TESTS_ENVIRONMENT = [...] $(top_builddir)/run --test
allows us to run the tests and only print the full output (including
debugging etc) when the test fails.

I noticed some uses of ${srcdir} in shell scripts.
That is almost always better written as $srcdir.
The patch below converts most such variable references.
Here are the few remaining candidates:

$ git grep -i -E '\$\{[a-zA-Z_0-9]+\}'|grep -v Makefile.in.in
configure.ac:        JAR_INSTALL_DIR=\${prefix}/share/java
configure.ac:        JNI_INSTALL_DIR=\${libdir}
debian/rules:   for TEST in ${DEBIAN_SKIP_TEST}; do \
debian/rules:#          mv $${mod} $$(dirname $${mod})/libguestfsmod.so; \
java/Makefile.am:libguestfs_jar_DATA = libguestfs-${VERSION}.jar
java/Makefile.am:libguestfs-${VERSION}.jar: $(libguestfs_jar_class_files)
perl/lib/Sys/Guestfs/Lib.pm:                      "-f", '${Package} ${Version} ${Architecture} ${Status}\n',
perl/typemap:            croak (\"${Package}::$func_name(): called on a closed handle\");
perl/typemap:        croak (\"${Package}::$func_name(): $var is not a blessed HV reference\");
tests/data/Makefile.am:   echo "$${i}abcdefghijklmnopqrstuvwxyz"; \

We could change all of those, too, except the ones in configure.ac
and Makefile.am, since they refer to Make variables.  Even those
should be changed, but to use the preferred Makefile notation:
$(prefix), $(libdir), $(VERSION).

>From a86770ecd45666232a94d76c8725c8f9b1c76e3a Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Mon, 23 Jan 2012 11:15:12 +0100
Subject: [PATCH libguestfs] maint: use $var notation rather than ${var} when
 possible

The only case to avoid in a shell script is when the byte after the
"}" is word-constituent, and concatenating it would thus change the
name of the variable.

These changes were induced by running this command:
  git grep -l -i -E '\$\{(srcdir|md)' \
    |xargs perl -pi -e 's/\$\{(srcdir|md)\}($|\w)/\$$1$2/gi'

The "g" was needed because there was one line with two instances.
The "i" is to handle ${SRCDIR}.  The ($|\w) ensures that concatenating
whatever follows the "}" won't change semantics.

* gobject/run-bindtests: Use "$srcdir", not "${srcdir}".
* haskell/run-bindtests: Likewise.
* java/run-bindtests: Likewise.
* ocaml/run-bindtests: Likewise.
* perl/run-bindtests: Likewise.
* python/run-bindtests: Likewise.
* ruby/run-bindtests: Likewise.
* tests/guests/guest-aux/make-debian-img.sh: Likewise, but $SRCDIR.
* tests/guests/guest-aux/make-ubuntu-img.sh: Likewise.
* tests/guests/guest-aux/make-windows-img.sh: Likewise.
* tests/md/test-mdadm.sh: Likewise, but $md.

(Includes fix by RWMJ)

Note that this change disables compiling and running the haskell bindtests. The
haskell bindings do not implement optargs, and adding optargs to test0 causes
that method not to be bound in the haskell bindings. This prevents the haskell
bindtests from compiling. These should be re-enabled when optargs are
implemented.

Update all copyright dates to 2012.