mirror of https://github.com/djcb/mu.git
348 lines
7.8 KiB
C++
348 lines
7.8 KiB
C++
/*
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** Copyright (C) 2012-2021 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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#include "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.hh"
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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, 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,
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(GRegexCompileFlags)(G_REGEX_CASELESS | G_REGEX_OPTIMIZE),
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(GRegexMatchFlags)0,
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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, (GRegexMatchFlags)0, NULL);
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if (!match && msi->_oneline)
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match = g_regex_match(rx, msi->_oneline, (GRegexMatchFlags)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_free_full(lst, (GDestroyNotify)script_info_destroy);
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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",
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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, &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, 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("%s%s", descr ? descr : "", 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",
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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,
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const char* ext,
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const char* descprefix,
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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,
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MU_ERROR_FILE_CANNOT_OPEN,
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"failed to open '%s': %s",
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path,
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g_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, 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, 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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if (access(mu_script_info_path(msi), R_OK) != 0) {
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mu_util_g_set_error(err,
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MU_ERROR_FILE_CANNOT_READ,
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"failed to read script: %s",
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g_strerror(errno));
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return FALSE;
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}
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argv = g_new0(char*, 6);
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argv[0] = g_strdup(GUILE_BINARY);
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argv[1] = g_strdup("-l");
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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("(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, const char** args, GError** err)
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{
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mu_util_g_set_error(err, MU_ERROR_INTERNAL, "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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