parse-datetime: use the module from gnulib

Use the parse-datetime module from gnulib, and adapt it to not require
other modules as portability is not really an issue for us.

DATE can be specified in different formats, such as: "-1 week", "last
monday", "1 week ago".

Include the generated .c file in the repository so to not add another
dependency to Bison.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Makefile-ostree.am

@@ -85,6 +85,10 @@ ostree_SOURCES += \
         src/ostree/ot-remote-builtin-refs.c \
 	$(NULL)
 
+src/ostree/parse-datetime.c: src/ostree/parse-datetime.y
+	$(YACC) $< -o $@
+
+
 ostree_bin_shared_cflags = $(AM_CFLAGS) -I$(srcdir)/src/libotutil -I$(srcdir)/src/libostree -I$(srcdir)/src/ostree \
 	$(NULL)
 ostree_bin_shared_ldadd = libglnx.la libbsdiff.la libotutil.la libostree-kernel-args.la libostree-1.la

configure.ac

@@ -13,6 +13,7 @@ AC_SYS_LARGEFILE
 
 AC_PROG_CC
 AM_PROG_CC_C_O
+AC_PROG_YACC
 
 changequote(,)dnl
 if test "x$GCC" = "xyes"; then

src/ostree/parse-datetime.h

@@ -1,31 +1,22 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
- *
- * Copyright (C) 2015 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
+/* Parse a string into an internal time stamp.
 
-#pragma once
+   Copyright (C) 1995, 1997-1998, 2003-2004, 2007, 2009-2015 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser 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, see <http://www.gnu.org/licenses/>.  */
 
-#include "config.h"
-#include <gio/gio.h>
 #include <stdbool.h>
 #include <time.h>
-#include <stdbool.h>
 
-G_BEGIN_DECLS
 bool parse_datetime (struct timespec *, char const *, struct timespec const *);
-G_END_DECLS

tests/test-prune.sh

@@ -93,4 +93,16 @@ ${CMD_PREFIX} ostree --repo=repo prune --keep-younger-than="2015-10-29 12:43:29
 find repo/objects -name '*.commit' | wc -l > commitcount
 assert_file_has_content commitcount "^1$"
 
+
+${CMD_PREFIX} ostree prune --repo=repo --refs-only --depth=0 -v
+find repo/objects -name '*.commit' | wc -l > commitcount
+assert_file_has_content commitcount "^1$"
+${CMD_PREFIX} ostree --repo=repo commit --branch=test -m test -s test tree --timestamp="October 25 1985"
+${CMD_PREFIX} ostree --repo=repo commit --branch=test -m test -s test tree --timestamp="October 21 2015"
+find repo/objects -name '*.commit' | wc -l > commitcount
+assert_file_has_content commitcount "^3$"
+${CMD_PREFIX} ostree --repo=repo prune --keep-younger-than="1 week ago"
+find repo/objects -name '*.commit' | wc -l > commitcount
+assert_file_has_content commitcount "^1$"
+
 echo "ok prune"