Add gentemplates.sh to extract template content

Some of the templates in the reference policy generate new booleans and
tunables, based on the $1, $2, ... parameters passed on. To allow
segenxml, which generates the necessary documentation on booleans, to
keep track of template-generated booleans as well, we need to allow it
to substitute template calls with the actual template content.

The gentemplates.sh script is a helper script that will extract template
code and store it as files (one file per template). These files are then
later on used by the segenxml tool.

Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>

support/gentemplates.sh

@@ -0,0 +1,62 @@
+#!/bin/sh
+
+showHelp() {
+  echo "Usage: $(basename $0) --generate --sourcedir=<sourcedir> --targetdir=<targetdir>"
+  echo "       $(basename $0) -g -s <sourcedir> -t <targetdir>"
+  echo "";
+  echo "The $(basename $0) script will fetch all template definitions from the interface files"
+  echo "located in the selected source directory, and write one file per template into the"
+  echo "target directory."
+  echo "";
+  echo "Supported options:"
+  echo "  --generate (-g)	Generate template files"
+  echo "  --sourcedir=<sourcedir> (-s <sourcedir>)"
+  echo "			Source directory to recursively search for interfaces/templates"
+  echo "  --targetdir=<targetdir> (-t <targetdir>)"
+  echo "			Target directory to store template definitions in"
+}
+
+flagGenerate=0;
+SOURCEDIR="";
+TARGETDIR="";
+
+params=$(getopt -n $(basename $0) -s sh -o gs:t: --long generate,sourcedir:,targetdir: -- "$@")
+if [ $? -ne 0 ] ; then
+  showHelp;
+  exit 1;
+fi
+
+eval set -- "${params}"
+while [ $# -gt 0 ] ; do
+  case "$1" in
+    (-g) flagGenerate=1;;
+    (-s) SOURCEDIR="$2"; shift;;
+    (-t) TARGETDIR="$2"; shift;;
+    (--) break;;
+    (-*) echo "$(basename $0): error: Unrecognized option $1" 1>&2; exit 1;;
+    (*) break;;
+  esac
+  shift;
+done
+
+if [ ${flagGenerate} -ne 1 ] || [ -z "${SOURCEDIR}" ] || [ -z "${TARGETDIR}" ] ; then
+  showHelp;
+  exit 1;
+fi
+
+if [ ! -d "${SOURCEDIR}" ] ; then
+  echo "Directory ${SOURCEDIR} does not exist"
+  exit 2;
+fi
+
+if [ ! -d "${TARGETDIR}" ] ; then
+  echo "Directory ${TARGETDIR} does not exist"
+  exit 3;
+fi
+
+for ifile in $(find ${SOURCEDIR} -type f -name '*.if'); do
+  for interface in $(grep -E '^template\(' ${ifile} | sed -e 's:^template(`\([^'\'']*\)'\''\s*,\s*`:\1:g'); do
+    # Generate the interface
+    sed -n "/^template(\`${interface}',\`/,/^')/p" ${ifile} | grep -v "^template" | grep -v "^')" > ${TARGETDIR}/${interface}.iftemplate;
+  done
+done