/*
 * updatewim.c - A program to add a file or directory tree to the first image of
 * a WIM file.
 *
 * The following copying information applies to this specific source code file:
 *
 * Written in 2014-2016 by Eric Biggers <ebiggers3@gmail.com>
 *
 * To the extent possible under law, the author(s) have dedicated all copyright
 * and related and neighboring rights to this software to the public domain
 * worldwide via the Creative Commons Zero 1.0 Universal Public Domain
 * Dedication (the "CC0").
 *
 * This software 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 CC0 for more details.
 *
 * You should have received a copy of the CC0 along with this software; if not
 * see <http://creativecommons.org/publicdomain/zero/1.0/>.
 */

#include <wimlib.h>
#include <string.h>

/*
 * Windows compatibility defines for string encoding.  Applications using wimlib
 * that need to run on both UNIX and Windows will need to do something similar
 * to this, whereas applications that only need to run on one or the other can
 * just use their platform's convention directly.
 */
#ifdef _WIN32
#  define main		wmain
   typedef wchar_t	tchar;
#  define TS		"ls"
#else
   typedef char		tchar;
#  define TS		"s"
#endif

int main(int argc, tchar **argv)
{
	int ret;
	tchar *wimfile;
	tchar *wim_target_path;
	tchar *fs_source_path;
	WIMStruct *wim = NULL;
	struct wimlib_update_command cmds[1];

	/* Check for the correct number of arguments.  */
	if (argc != 4) {
		fprintf(stderr, "Usage: updatewim WIMFILE WIM_PATH EXTERNAL_PATH\n");
		return 2;
	}

	wimfile = argv[1];
	wim_target_path = argv[2];
	fs_source_path = argv[3];

	/* Open the WIM file.  */
	ret = wimlib_open_wim(wimfile, 0, &wim);
	if (ret != 0)  /* Always should check the error codes.  */
		goto out;

	/* Update the WIM image.  In this simple example, we add a single file
	 * or directory tree to the specified location in the first image of the
	 * WIM file, using the default options.
	 *
	 * wimlib_add_tree() is actually sufficient for this case, but for the
	 * sake of demonstration we will use the more general function
	 * wimlib_update_image().  */

	memset(cmds, 0, sizeof(cmds));

	/* Set up an "add" operation.
	 *
	 * Other available operations include WIMLIB_UPDATE_OP_RENAME and
	 * WIMLIB_UPDATE_OP_DELETE.  */
	cmds[0].op = WIMLIB_UPDATE_OP_ADD;

	/* Set the arguments to the operation.
	 *
	 * Make sure to fill in 'rename' or 'delete_' instead of 'add' if doing
	 * a rename or delete operation instead!  */
	cmds[0].add.wim_target_path = wim_target_path;
	cmds[0].add.fs_source_path = fs_source_path;

	/* Note: we don't need to explicitly set 'cmds[0].add.config_file' and
	 * 'cmds[0].add.add_flags' because we zeroed the 'struct
	 * wimlib_update_command', and zero means use the defaults.  */

	ret = wimlib_update_image(wim,  /* WIMStruct to update  */
				  1,	/* 1-based index of the image to update  */
				  cmds, /* Array of command structures  */
				  1,    /* Number of command structures in array  */
				  0);   /* WIMLIB_UPDATE_FLAG_* flags (0 for defaults)  */
	if (ret != 0)
		goto out;

	/* Overwrite the WIM file.
	 *
	 * Normally, this will append new data to the file, rather than
	 * rebuilding the entire file.
	 *
	 * Changes do not take effect on-disk until this is done.  */

	ret = wimlib_overwrite(wim, /* WIMStruct to commit to the underlying file  */
			       0,   /* WIMLIB_WRITE_FLAG_* flags (0 for defaults)   */
			       0);  /* Number of compressor threads (0 means default)  */

out:
	/* Free the WIMStruct.  Has no effect if the pointer to it is NULL.  */
	wimlib_free(wim);

	/* Check for error status.  */
	if (ret != 0) {
		fprintf(stderr, "wimlib error %d: %" TS"\n",
			ret, wimlib_get_error_string((enum wimlib_error_code)ret));
	}

	/* Free global memory (optional).  */
	wimlib_global_cleanup();

	return ret;
}