4 files changed, 150 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..582438e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+mark-as-expendable-dir
+man.commons
+*.common
+*.1
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8924ad7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,63 @@
+#
+#  mark-as-expendable-dir - create CACHEDIR.TAG and .rsync-filter files
+#
+#  Copyright (c) 2017 Erich Eckner <opensource at eckner dot net>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+#  USA.
+#
+
+DESTDIR	 =
+BINDIR	 = /usr/bin
+MANDIR	 = /usr/share/man
+
+VERSION  = 0.0
+
+all: man.commons mark-as-expendable-dir mark-as-expendable-dir.1
+
+%: %.in
+	sed " \
+		s/#VERSION#/$(VERSION)/; \
+		s@#BINDIR#@$(BINDIR)@; \
+		s@#ETCDIR#@$(ETCDIR)@; \
+		s@#HELPTEXT#\(\s\+\)#@  --help   \1display this help and exit\n  --version\1display version and exit@; \
+		" $< > $@
+	[ "$@" = "mark-as-expendable-dir" ] && chmod +x "$@" || true
+
+%.1: % man.commons
+	grep -v "^$<(" man.commons | sed '/^\[SEE ALSO]$$/{n;:a;N;/\[/b;s/\n/, /;ta;}' > "$<.common" && \
+	help2man \
+		-n 'Create CACHEDIR.TAG and .rsync-filter files' \
+		-o "$@" -N --include $<.common --no-discard-stderr "./$<"
+
+.PHONY:	install dist clean
+
+install: all
+	install -D -m0755 mark-as-expendable-dir $(DESTDIR)$(BINDIR)/mark-as-expendable-dir
+	install -D -m0644 mark-as-expendable-dir.1 $(DESTDIR)$(MANDIR)/man1/mark-as-expendable-dir.1
+
+clean:
+	ls -A | \
+		grep "^\($(shell sed 's|\.|\\.|; s|\*|.*|; s|$$|\\|' .gitignore | tr '\n' '\|')\)\$$" | \
+		xargs -r rm
+
+dist: clean
+	git status --porcelain 2> /dev/null | grep -q "\S" && (git add .; git commit -m"neue Version: $(VERSION)") || true
+	! git tag -d v$(VERSION) 2> /dev/null
+	git tag v$(VERSION)
+	git push
+	git push --tags
+
+# End of file
diff --git a/man.commons.in b/man.commons.in
new file mode 100644
index 0000000..c811002
--- /dev/null
+++ b/man.commons.in
@@ -0,0 +1,8 @@
+[FILES]
+.TP
+.B "#BINDIR#/mark-as-expendable-dir"
+program file
+[AUTHOR]
+.nf
+Erich Eckner <opensource at eckner dot net>
+.fi
diff --git a/mark-as-expendable-dir.in b/mark-as-expendable-dir.in
new file mode 100644
index 0000000..c02ae5b
--- /dev/null
+++ b/mark-as-expendable-dir.in
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+set -e
+
+verwendung() {
+  >&2 echo 'mark-as-expendable-dir creates CACHEDIR.TAG and .rsync-filter files to hide directory from backups by "tar --exclude-caches" and "rsync -F".'
+  >&2 echo ''
+  >&2 echo 'Usage: mark-as-expendable-dir [OPTIONS] [DIRECTORIES]'
+  >&2 echo '  -c,--caller=caller  name of caller to put into comment of CACHEDIR.TAG'
+  >&2 echo \
+'#HELPTEXT#    #'
+  exit 1
+}
+
+eval set -- "$(getopt -o c --long caller:,help,version -n "$(basename "$0")" -- "$@" || echo verwendung)"
+
+caller="$(ps -o comm= $PPID)"
+
+while true
+do
+  case "$1" in
+    -c|--caller)
+      shift
+      caller="$1"
+    ;;
+    --help)
+      verwendung 0
+      ;;
+    --version)
+      echo '#VERSION#'
+      exit 0
+      ;;
+    --)
+      shift
+      break
+      ;;
+    *)
+      >&2 echo "FEHLER: Verstehe Option \"$1\" doch nicht! Ich beende."
+      verwendung
+      ;;
+  esac
+  shift
+done
+
+if [ $# -eq 0 ]
+then
+  >&2 echo 'No directories given - was this intented?'
+  verwendung
+fi
+
+for dir in "$@"
+do
+  if [ ! -d "${dir}" ]
+  then
+    >&2 echo "Argument '${dir}' is not a directory.'
+    verwendung
+  fi
+done
+
+for dir in "$@"
+do
+  (
+    echo -n 'Signature: '
+    echo -n '.IsCacheDirectory' | \
+      md5sum - | \
+      cut -d ' ' -f 1
+    echo '# This file is a cache directory tag created by '"$(basename "$0")"' for '"${caller}"'.'
+    echo '# For information about cache directory tags, see:'
+    echo '#      http://www.brynosaurus.com/cachedir/'
+  ) > "${dir}/CACHEDIR.TAG"
+  (
+    echo '+ .rsync-filter'
+    echo '- *'
+  ) > "${dir}/.rsync-filter"
+done