Add Aspersa tools, their tests, and util/test-bash-tool.

Update and simplify copyright notices.

util/test-bash-tool

@@ -0,0 +1,108 @@
+#!/usr/bin/env bash
+
+die() {
+   echo $1 >&2
+   exit 255
+}
+
+warn() {
+   echo $1 >&2
+}
+
+if [ -n "$PERCONA_TOOLKIT_BRANCH" ]; then
+   BRANCH=$PERCONA_TOOLKIT_BRANCH
+   cd $BRANCH
+else
+   while [ ! -f Makefile.PL ] && [ $(pwd) != "/" ]; do
+      cd ..
+   done
+   if [ ! -f Makefile.PL ]; then
+      die "Cannot find the root directory of the Percona Toolkit branch"
+      exit 1
+   fi
+   BRANCH=`pwd`
+fi
+
+result() {
+   result=$1
+   if [ $result -eq 0 ]; then
+      echo -n "ok $testno - $t"
+   else
+      echo "not ok $testno - $t"
+      failed_tests=$(( failed_tests + 1))
+      # Indent and display the first 30 lines
+      diff "${GL_result}" "${GL_expected}" | sed -e 's/^/#   /' -e '30q'
+   fi
+
+   testno=$(( testno + 1))
+}
+
+# All variables are named GL_whatever so they don't get overwritten with stuff
+# that happens in the functions sourced.
+GL_input="/tmp/percona-toolkit-test"
+GL_expected="/tmp/percona-toolkit-test-expected"
+GL_result="/tmp/percona-toolkit-test-result"
+
+run_test() {
+   t=$1  # test file name, e.g. "group-by-all-01" for pt-diskstats
+
+   # Return unless the test file is bash.  There may be other types of
+   # files in the tool's test dir.
+   head -n 1 $t | grep -q bash || die "$t is not a bash file"
+
+   # The format of the test file is as follows:
+   # - line 1 is the shebang
+   # - line 2 is the command to run, commented out
+   # - argument 1 is the file to which the expected result should be printed
+   # - argument 2 is the file to which the input should be printed
+
+   # Get the command to run
+   GL_cmd="$(head -n2 $t | tail -n1 | cut -b2-)"
+
+   # Execute the file and tell it where to save the input & expected result
+   if [ -x "${t}" ]; then
+      ./$t "${GL_expected}" "${GL_input}"
+   else
+      die "$t is not executable"
+   fi
+
+   # Execute the command
+   ${GL_cmd} > "${GL_result}"
+
+   # Is the result the same as the expected result?
+   diff -q "${GL_result}" "${GL_expected}" >/dev/null
+   result $?
+
+   # Clean up
+   rm -f /tmp/percona-toolkit-test*
+}
+
+tool=$1  # bash tool, e.g. pt-diskstats
+t=$2     # optional test file, e.g. group-by-all-01
+if [ -z "$tool" ]; then
+   die "No tool specified"
+fi
+
+cd $BRANCH/bin
+if [ ! -f $tool ]; then
+   die "$tool does not exist"
+fi
+head -n1 $tool | grep bash || die "$tool is not a bash file"
+
+# Source the tool, i.e. import its functions.
+source $tool
+
+cd $BRANCH/t/$tool
+testno=1
+failed_tests=0
+if [ -z "$t" ]; then
+   # Run all the tool's tests.
+   for t in *; do
+      run_test $t
+   done
+else
+   # Run just the specified test.
+   run_test $t
+fi
+
+exit $failed_tests