mirror of
https://github.com/djcb/mu.git
synced 2024-06-29 07:51:04 +02:00
361 lines
7.5 KiB
C
361 lines
7.5 KiB
C
/*
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** Copyright (C) 2012-2020 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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**
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** This program is free software; you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by the
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** Free Software Foundation; either version 3, or (at your option) any
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** later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software Foundation,
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** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif /*HAVE_CONFIG_H*/
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#ifdef BUILD_GUILE
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wredundant-decls"
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#include <libguile.h>
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#pragma GCC diagnostic pop
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#endif /*BUILD_GUILE*/
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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#include <unistd.h>
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#include "utils/mu-str.h"
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#include "mu-script.h"
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#include "utils/mu-util.h"
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/**
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* Structure with information about a certain script.
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* the values will be *freed* when MuScriptInfo is freed
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*/
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struct _MuScriptInfo {
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char *_name; /* filename-sans-extension */
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char *_path; /* full path to script */
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char *_oneline; /* one-line description */
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char *_descr; /* longer description */
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};
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/* create a new MuScriptInfo* object*/
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static MuScriptInfo*
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script_info_new (void)
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{
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return g_slice_new0 (MuScriptInfo);
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}
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/* destroy a MuScriptInfo* object */
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static void
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script_info_destroy (MuScriptInfo *msi)
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{
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if (!msi)
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return;
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g_free (msi->_name);
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g_free (msi->_path);
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g_free (msi->_oneline);
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g_free (msi->_descr);
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g_slice_free (MuScriptInfo, msi);
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}
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/* compare two MuScripInfo* objects (for sorting) */
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static int
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script_info_cmp (MuScriptInfo *msi1, MuScriptInfo *msi2)
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{
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return strcmp (msi1->_name, msi2->_name);
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}
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const char*
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mu_script_info_name (MuScriptInfo *msi)
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{
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g_return_val_if_fail (msi, NULL);
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return msi->_name;
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}
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const char*
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mu_script_info_path (MuScriptInfo *msi)
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{
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g_return_val_if_fail (msi, NULL);
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return msi->_path;
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}
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const char*
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mu_script_info_one_line (MuScriptInfo *msi)
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{
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g_return_val_if_fail (msi, NULL);
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return msi->_oneline;
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}
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const char*
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mu_script_info_description (MuScriptInfo *msi)
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{
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g_return_val_if_fail (msi, NULL);
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return msi->_descr;
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}
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gboolean
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mu_script_info_matches_regex (MuScriptInfo *msi, const char *rxstr,
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GError **err)
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{
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GRegex *rx;
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gboolean match;
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g_return_val_if_fail (msi, FALSE);
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g_return_val_if_fail (rxstr, FALSE);
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rx = g_regex_new (rxstr, G_REGEX_CASELESS|G_REGEX_OPTIMIZE, 0, err);
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if (!rx)
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return FALSE;
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match = FALSE;
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if (msi->_name)
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match = g_regex_match (rx, msi->_name, 0, NULL);
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if (!match && msi->_oneline)
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match = g_regex_match (rx, msi->_oneline, 0, NULL);
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return match;
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}
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void
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mu_script_info_list_destroy (GSList *lst)
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{
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g_slist_foreach (lst, (GFunc)script_info_destroy, NULL);
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g_slist_free (lst);
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}
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static GIOChannel *
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open_channel (const char *path)
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{
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GError *err;
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GIOChannel *io_chan;
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err = NULL;
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io_chan = g_io_channel_new_file (path, "r", &err);
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if (!io_chan) {
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g_warning ("failed to open '%s': %s", path,
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err ? err->message : "something went wrong");
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g_clear_error (&err);
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return NULL;
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}
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return io_chan;
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}
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static void
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end_channel (GIOChannel *io_chan)
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{
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GIOStatus status;
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GError *err;
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err = NULL;
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status = g_io_channel_shutdown (io_chan, FALSE,
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&err);
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if (status != G_IO_STATUS_NORMAL) {
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g_warning ("failed to shutdown io-channel: %s",
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err ? err->message : "something went wrong");
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g_clear_error (&err);
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}
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g_io_channel_unref (io_chan);
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}
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static gboolean
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get_descriptions (MuScriptInfo *msi, const char *prefix)
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{
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GIOStatus io_status;
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GIOChannel *script_io;
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GError *err;
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char *line, *descr, *oneline;
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if (!prefix)
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return TRUE; /* not an error */
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if (!(script_io = open_channel (msi->_path)))
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return FALSE;
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err = NULL;
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line = descr = oneline = NULL;
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do {
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g_free (line);
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io_status = g_io_channel_read_line (script_io, &line,
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NULL, NULL, &err);
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if (io_status != G_IO_STATUS_NORMAL)
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break;
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if (!g_str_has_prefix (line, prefix))
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continue;
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if (!oneline)
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oneline = g_strdup (line + strlen (prefix));
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else {
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char *tmp;
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tmp = descr;
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descr = g_strdup_printf
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("%s%s", descr ? descr : "",
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line + strlen(prefix));
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g_free (tmp);
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}
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} while (TRUE);
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if (io_status != G_IO_STATUS_EOF) {
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g_warning ("error reading %s: %s", msi->_path,
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err ? err->message : "something went wrong");
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g_clear_error (&err);
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}
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end_channel (script_io);
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msi->_oneline = oneline;
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msi->_descr = descr;
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return TRUE;
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}
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GSList*
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mu_script_get_script_info_list (const char *path, const char *ext,
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const char *descprefix, GError **err)
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{
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DIR *dir;
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GSList *lst;
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struct dirent *dentry;
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g_return_val_if_fail (path, NULL);
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dir = opendir (path);
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if (!dir) {
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mu_util_g_set_error (err, MU_ERROR_FILE_CANNOT_OPEN,
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"failed to open '%s': %s",
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path, strerror(errno));
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return NULL;
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}
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/* create a list of names, paths */
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lst = NULL;
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while ((dentry = readdir (dir))) {
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MuScriptInfo *msi;
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/* only consider files with certain extensions,
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* if ext != NULL */
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if (ext && !g_str_has_suffix (dentry->d_name, ext))
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continue;
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msi = script_info_new ();
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msi->_name = g_strdup (dentry->d_name);
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if (ext) /* strip the extension */
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msi->_name[strlen(msi->_name) - strlen(ext)] = '\0';
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msi->_path = g_strdup_printf ("%s%c%s", path, G_DIR_SEPARATOR,
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dentry->d_name);
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/* set the one-line and long description */
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get_descriptions (msi, descprefix);
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lst = g_slist_prepend (lst, msi);
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}
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closedir (dir); /* ignore error checking... */
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return g_slist_sort (lst, (GCompareFunc)script_info_cmp);
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}
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MuScriptInfo*
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mu_script_find_script_with_name (GSList *lst, const char *name)
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{
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GSList *cur;
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g_return_val_if_fail (name, NULL);
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for (cur = lst; cur; cur = g_slist_next (cur)) {
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MuScriptInfo *msi;
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msi = (MuScriptInfo*)cur->data;
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if (g_strcmp0 (name, mu_script_info_name (msi)) == 0)
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return msi;
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}
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return NULL;
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}
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#ifdef BUILD_GUILE
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static void
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guile_shell (void *closure, int argc, char **argv)
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{
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scm_shell (argc, argv);
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}
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gboolean
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mu_script_guile_run (MuScriptInfo *msi, const char *muhome,
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const char **args, GError **err)
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{
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const char *s;
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char *mainargs, *expr;
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char **argv;
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g_return_val_if_fail (msi, FALSE);
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g_return_val_if_fail (muhome, FALSE);
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argv = g_new0 (char*, 6);
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argv[0] = g_strdup("guile2.2");
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argv[1] = g_strdup("-l");
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if (access (mu_script_info_path (msi), R_OK) != 0) {
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mu_util_g_set_error (err, MU_ERROR_FILE_CANNOT_READ,
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"failed to read script: %s",
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strerror(errno));
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return FALSE;
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}
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s = mu_script_info_path (msi);
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argv[2] = g_strdup (s ? s : "");
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mainargs = mu_str_quoted_from_strv (args);
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expr = g_strdup_printf (
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"(main '(\"%s\" \"--muhome=%s\" %s))",
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mu_script_info_name (msi),
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muhome,
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mainargs ? mainargs : "");
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g_free (mainargs);
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argv[3] = g_strdup("-c");
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argv[4] = expr;
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scm_boot_guile (5, argv, guile_shell, NULL);
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/* never reached but let's be correct(TM)*/
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g_strfreev (argv);
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return TRUE;
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}
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#else /*!BUILD_GUILE*/
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gboolean
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mu_script_guile_run (MuScriptInfo *msi, const char *muhome,
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const char **args, GError **err)
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{
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mu_util_g_set_error (err, MU_ERROR_INTERNAL,
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"this mu does not have guile support");
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return FALSE;
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}
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#endif /*!BUILD_GUILE*/
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