coverage.sh: Added a helper script to generate HTML coverage reports.

The script uses lcov and creates a clean copy of the source code in a
temporary directory using 'make dist'.

diff --git a/coverage.sh b/coverage.sh
new file mode 100755 (executable)
index 0000000..a62f883
--- /dev/null
+++ b/coverage.sh
@@ -0,0 +1,58 @@
+#! /bin/bash
+#
+# SysDB -- coverage.sh
+#
+# Create a test coverage report for the System DataBase.
+
+set -e
+
+if ! which lcov || ! which genhtml; then
+       echo "lcov is required in order to generate a test coverage report" >&2
+       exit 1
+fi
+
+cd $( dirname "$0" )
+
+if test -e coverage; then
+       echo "coverage exists already; please remove manually" >&2
+       exit 1
+fi
+
+V=$( grep '^PACKAGE_VERSION' Makefile | cut -d' ' -f3 )
+if test -z "$V"; then
+       echo "Unable to determine package version" >&2
+       exit 1
+fi
+
+make dist
+
+tmpdir=$( mktemp -d -t )
+trap "rm -rf $tmpdir" EXIT
+
+srcdir=$( pwd )
+
+cd $tmpdir
+tar --strip-components=1 -zxf "$srcdir"/sysdb-$V.tar.gz
+if test -d "$srcdir"/.git/; then
+       # copy Git database for version-gen.sh
+       cp -a "$srcdir"/.git .
+fi
+
+./configure --enable-gcov --disable-shared CFLAGS="-O0 -g"
+make
+
+V1=$( grep '^PACKAGE_VERSION' Makefile | cut -d' ' -f3 )
+if test -z "$V1"; then
+       # this should not happen
+       V1="$V"
+fi
+
+lcov --base-directory src --directory src --zerocount
+make test
+lcov --base-directory src --directory src --no-external \
+       --capture -o sysdb_coverage.info
+
+genhtml -o "$srcdir"/coverage \
+       -t "SysDB $V1 test coverage" --num-spaces=4 --legend \
+       sysdb_coverage.info
+