bin, make, scripts: Re-add files necessary for packaging jw-build

Re-add all files necessary to package jw-build itself, i.e.
sucessfully run make pkg-rebuild-reinstall. This adds 1892 lines of
code.

Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/scm.sh

@@ -0,0 +1,174 @@
+#!/bin/bash
+
+cmd_mv()
+{
+	local from="$1"
+	local to="$2"
+	case $scm in
+	cvs)
+		cp "$from" "$to"
+		cvs add "$to"
+		cvs remove -f "$from"
+		;;
+	git)
+		git mv "$from" "$to"
+		;;
+	esac
+}
+
+cmd_commit()
+{
+	C=''
+	for i in "$@"; do 
+	    C="$C \"${i//\"/\\\"}\""
+	done
+	eval $scm commit "$C"
+}
+
+cmd_add()
+{
+	$scm add "$@"
+}
+
+cmd_rm()
+{
+	case $scm in
+	cvs)
+		cvs remove "$@"
+		;;
+	git)
+		git rm "$@"
+		;;
+	esac
+}
+
+cmd_clean()
+{
+	case $scm in
+	cvs)
+		while [ "${1:0:1}" = - ]; do
+			shift
+		done
+		set +e
+		local file
+		for file in $@; do
+			if ! grep -q "/$file/" CVS/Entries; then
+				rm -f $file
+			fi
+		done
+		;;
+	git)
+		git clean -x "$@"
+		;;
+	esac
+}
+
+cmd_ls_files()
+{
+	filter_deleted()
+	{
+		local rc_file="$1"
+		shift
+		local cand
+		for cand in "$@"; do
+			grep -q "^R ./$cand/" $rc_file && continue
+			echo $cand
+		done
+	}
+
+	output()
+	{
+		if [ "$zero_terminate" = 1 ]; then
+			echo -en "$*\x00"
+		else
+			echo "$*"
+		fi
+	}
+
+	list_dirents_cvs()
+	{
+		local dirs=`sed '/^D\// !d; s%^D/%%; s%/.*%%' $1/CVS/Entries`
+		dirs="`filter_deleted $1/CVS/Entries $dirs`"
+		local cands
+		if [ -f $1/CVS/Entries.Log ]; then
+			cands="`sed '/^A D\// !d; s%^A D/%%; s%/.*%%' $1/CVS/Entries.Log`"
+			dirs="$dirs `filter_deleted $1/CVS/Entries.Log $cands`"
+		fi
+		local files=`sed '/^\// !d; s%/%%; s%/.*%%; s%^%%' $1/CVS/Entries`
+		files="`filter_deleted $1/CVS/Entries $files`"
+		local d f
+		for f in $files; do
+			output "$1/$f"
+		done
+		for d in $dirs; do
+			[ "$opt_only_regular_files" = 1 ] || output $1/$d
+			list_dirents_cvs $1/$d
+		done
+	}
+
+	list_dirents_git()
+	{
+		local opts="$git_ls_files_opts"
+		git --version | grep -q "version *1" && opt_no_submodules=1
+		[ "$opt_no_submodules" = 1 ] || opts="$opts --recurse-submodules"
+		git ls-files --recurse-submodules $opts $1
+	}
+
+	list_dirents()
+	{
+		if [ -d $1/CVS ]; then
+			list_dirents_cvs $1
+			return
+		fi
+		git status >/dev/null 2>&1 || {
+			echo "failed to list versioned files in $1: no VCS" >&2
+			exit 1
+		}
+		list_dirents_git $1
+	}
+
+	set -- `getopt fnzt "$@"`
+
+	while [ "$1" != -- ]; do
+	case $1 in
+	-f)
+		opt_only_regular_files=1
+		;;
+	-n)
+		opt_no_submodules=1
+		;;
+	-z)
+		zero_terminate=1
+		git_ls_files_opts="$git_ls_files_opts -z"
+		opt_sort="$opt_sort -z"
+		;;
+	-t)
+		text_files=1
+		;;
+	esac
+	shift
+	done
+	shift
+
+	proj_dir="$1"
+	[ "$proj_dir" ] && cd $proj_dir
+
+	if [ "$text_files" ]; then
+		list_dirents . | sort $opt_sort | xargs file -N | grep ":.*text" | cut -d: -f1
+	else
+		list_dirents . | sort $opt_sort
+	fi
+}
+
+# ------- here we go
+export LANG=POSIX
+myname=`basename $0`
+cmd=cmd_${1//-/_}
+shift
+if [ -d "CVS" ]; then
+	scm=cvs
+else
+	scm=git
+fi
+
+$cmd "$@"