/* $OpenBSD$ */

/*
* Copyright (c) 2008 Tiago Cunha <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/types.h>

#include <errno.h>
#include <glob.h>
#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
* Sources a configuration file.
*/

static enum cmd_retval  cmd_source_file_exec(struct cmd *, struct cmdq_item *);

const struct cmd_entry cmd_source_file_entry = {
       .name = "source-file",
       .alias = "source",

       .args = { "t:Fnqv", 1, -1, NULL },
       .usage = "[-Fnqv] " CMD_TARGET_PANE_USAGE " path ...",

       .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },

       .flags = 0,
       .exec = cmd_source_file_exec
};

struct cmd_source_file_data {
       struct cmdq_item         *item;
       int                       flags;

       struct cmdq_item         *after;
       enum cmd_retval           retval;

       u_int                     current;
       char                    **files;
       u_int                     nfiles;
};

static enum cmd_retval
cmd_source_file_complete_cb(struct cmdq_item *item, __unused void *data)
{
       cfg_print_causes(item);
       return (CMD_RETURN_NORMAL);
}

static void
cmd_source_file_complete(struct client *c, struct cmd_source_file_data *cdata)
{
       struct cmdq_item        *new_item;
       u_int                    i;

       if (cfg_finished) {
               if (cdata->retval == CMD_RETURN_ERROR &&
                   c != NULL &&
                   c->session == NULL)
                       c->retval = 1;
               new_item = cmdq_get_callback(cmd_source_file_complete_cb, NULL);
               cmdq_insert_after(cdata->after, new_item);
       }

       for (i = 0; i < cdata->nfiles; i++)
               free(cdata->files[i]);
       free(cdata->files);
       free(cdata);
}

static void
cmd_source_file_done(struct client *c, const char *path, int error,
   int closed, struct evbuffer *buffer, void *data)
{
       struct cmd_source_file_data     *cdata = data;
       struct cmdq_item                *item = cdata->item;
       void                            *bdata = EVBUFFER_DATA(buffer);
       size_t                           bsize = EVBUFFER_LENGTH(buffer);
       u_int                            n;
       struct cmdq_item                *new_item;
       struct cmd_find_state           *target = cmdq_get_target(item);

       if (!closed)
               return;

       if (error != 0)
               cmdq_error(item, "%s: %s", path, strerror(error));
       else if (bsize != 0) {
               if (load_cfg_from_buffer(bdata, bsize, path, c, cdata->after,
                   target, cdata->flags, &new_item) < 0)
                       cdata->retval = CMD_RETURN_ERROR;
               else if (new_item != NULL)
                       cdata->after = new_item;
       }

       n = ++cdata->current;
       if (n < cdata->nfiles)
               file_read(c, cdata->files[n], cmd_source_file_done, cdata);
       else {
               cmd_source_file_complete(c, cdata);
               cmdq_continue(item);
       }
}

static void
cmd_source_file_add(struct cmd_source_file_data *cdata, const char *path)
{
       log_debug("%s: %s", __func__, path);
       cdata->files = xreallocarray(cdata->files, cdata->nfiles + 1,
           sizeof *cdata->files);
       cdata->files[cdata->nfiles++] = xstrdup(path);
}

static enum cmd_retval
cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args                     *args = cmd_get_args(self);
       struct cmd_source_file_data     *cdata;
       struct client                   *c = cmdq_get_client(item);
       enum cmd_retval                  retval = CMD_RETURN_NORMAL;
       char                            *pattern, *cwd, *expanded = NULL;
       const char                      *path, *error;
       glob_t                           g;
       int                              result;
       u_int                            i, j;

       cdata = xcalloc(1, sizeof *cdata);
       cdata->item = item;

       if (args_has(args, 'q'))
               cdata->flags |= CMD_PARSE_QUIET;
       if (args_has(args, 'n'))
               cdata->flags |= CMD_PARSE_PARSEONLY;
       if (args_has(args, 'v'))
               cdata->flags |= CMD_PARSE_VERBOSE;

       utf8_stravis(&cwd, server_client_get_cwd(c, NULL), VIS_GLOB);

       for (i = 0; i < args_count(args); i++) {
               path = args_string(args, i);
               if (args_has(args, 'F')) {
                       free(expanded);
                       expanded = format_single_from_target(item, path);
                       path = expanded;
               }
               if (strcmp(path, "-") == 0) {
                       cmd_source_file_add(cdata, "-");
                       continue;
               }

               if (*path == '/')
                       pattern = xstrdup(path);
               else
                       xasprintf(&pattern, "%s/%s", cwd, path);
               log_debug("%s: %s", __func__, pattern);

               if ((result = glob(pattern, 0, NULL, &g)) != 0) {
                       if (result != GLOB_NOMATCH ||
                           (~cdata->flags & CMD_PARSE_QUIET)) {
                               if (result == GLOB_NOMATCH)
                                       error = strerror(ENOENT);
                               else if (result == GLOB_NOSPACE)
                                       error = strerror(ENOMEM);
                               else
                                       error = strerror(EINVAL);
                               cmdq_error(item, "%s: %s", path, error);
                               retval = CMD_RETURN_ERROR;
                       }
                       globfree(&g);
                       free(pattern);
                       continue;
               }
               free(pattern);

               for (j = 0; j < g.gl_pathc; j++)
                       cmd_source_file_add(cdata, g.gl_pathv[j]);
               globfree(&g);
       }
       free(expanded);

       cdata->after = item;
       cdata->retval = retval;

       if (cdata->nfiles != 0) {
               file_read(c, cdata->files[0], cmd_source_file_done, cdata);
               retval = CMD_RETURN_WAIT;
       } else
               cmd_source_file_complete(c, cdata);

       free(cwd);
       return (retval);
}

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