development tools: add script to setup detect module

Simplify creation of a new detect module by creating a copy of the
detect template. It sets the name and registers it in the build
system. Finally it's registration function is called.

scripts/setup_simple_detect.sh

@@ -0,0 +1,93 @@
+#!/bin/bash
+#
+# Script to setup a new 'simple' detect module.
+# Written by Victor Julien <victor@inliniac.net>
+#
+
+set -e
+#set -x
+
+function Usage {
+    echo
+    echo "$(basename $0) -- script to provision a detect module. The script"
+    echo "makes a copy of detect-template, sets the name and updates"
+    echo "the build system."
+    echo
+    echo "Call from the 'src' directory, with one argument: the detect module"
+    echo "name."
+    echo
+    echo "E.g. inside 'src': ../scripts/$(basename $0) helloworld"
+    echo
+}
+
+function Done {
+    echo
+    echo "Detect module $NR has been set up in $FILE_C and $FILE_H"
+    echo "and the build system has been updated."
+    echo
+    echo "The detect module should now compile cleanly. Try running 'make'."
+    echo
+    echo "Next steps are to edit the files to implement the actual"
+    echo "detection logic of $NR."
+    echo
+}
+
+if [ $# -ne "1" ]; then
+    Usage
+    echo "ERROR: call with one argument"
+    exit 1
+fi
+
+INPUT=$1
+# lowercase
+LC=${INPUT,,}
+#echo $LC
+# UPPERCASE
+UC=${LC^^}
+#echo $UC
+# Normal
+NR=${LC^}
+#echo $NR
+
+FILE_C="detect-${LC}.c"
+FILE_H="detect-${LC}.h"
+#echo $FILE_C
+#echo $FILE_H
+
+if [ ! -e ../configure.ac ] || [ ! -e Makefile.am ]; then
+    Usage
+    echo "ERROR: call from src/ directory"
+    exit 1
+fi
+if [ ! -e detect-template.c ] || [ ! -e detect-template.h ]; then
+    Usage
+    echo "ERROR: input files detect-template.c and/or detect-template.h are missing"
+    exit 1
+fi
+if [ -e $FILE_C ] || [ -e $FILE_H ]; then
+    Usage
+    echo "ERROR: file(s) $FILE_C and/or $FILE_H already exist, won't overwrite"
+    exit 1
+fi
+
+cp detect-template.c $FILE_C
+cp detect-template.h $FILE_H
+
+# search and replaces
+sed -i "s/TEMPLATE/${UC}/g" $FILE_C
+sed -i "s/TEMPLATE/${UC}/g" $FILE_H
+sed -i "s/Template/${NR}/g" $FILE_C
+sed -i "s/Template/${NR}/g" $FILE_H
+sed -i "s/template/${LC}/g" $FILE_C
+sed -i "s/template/${LC}/g" $FILE_H
+# add to Makefile.am
+sed -i "s/detect-template.c detect-template.h \\\/detect-template.c detect-template.h \\\\\n${FILE_C} ${FILE_H} \\\/g" Makefile.am
+# update enum
+sed -i "s/DETECT_TEMPLATE,/DETECT_TEMPLATE,\\n    DETECT_${UC},/g" detect.h
+# add include to detect.c
+sed -i "s/#include \"detect-template.h\"/#include \"detect-template.h\"\\n#include \"${FILE_H}\"/g" detect.c
+# add reg func to detect.c
+sed -i "s/DetectTemplateRegister();/DetectTemplateRegister();\\n    Detect${NR}Register();/g" detect.c
+
+Done
+exit 0