add hook data types and parser

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

lib/libalpm/hook.c

@@ -0,0 +1,156 @@
+/*
+ *  hook.c
+ *
+ *  Copyright (c) 2015 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU 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 <errno.h>
+
+#include "handle.h"
+#include "hook.h"
+#include "log.h"
+#include "util.h"
+
+enum _alpm_hook_op_t {
+	ALPM_HOOK_OP_INSTALL = (1 << 0),
+	ALPM_HOOK_OP_UPGRADE = (1 << 1),
+	ALPM_HOOK_OP_REMOVE = (1 << 2),
+};
+
+enum _alpm_trigger_type_t {
+	ALPM_HOOK_TYPE_PACKAGE = 1,
+	ALPM_HOOK_TYPE_FILE,
+};
+
+struct _alpm_trigger_t {
+	enum _alpm_hook_op_t op;
+	enum _alpm_trigger_type_t type;
+	alpm_list_t *targets;
+};
+
+struct _alpm_hook_t {
+	char *name;
+	alpm_list_t *triggers;
+	alpm_list_t *depends;
+	char *cmd;
+	enum _alpm_hook_when_t when;
+	int abort_on_fail;
+};
+
+struct _alpm_hook_cb_ctx {
+	alpm_handle_t *handle;
+	struct _alpm_hook_t *hook;
+};
+
+static void _alpm_trigger_free(struct _alpm_trigger_t *trigger)
+{
+	if(trigger) {
+		FREELIST(trigger->targets);
+		free(trigger);
+	}
+}
+
+static void _alpm_hook_free(struct _alpm_hook_t *hook)
+{
+	if(hook) {
+		free(hook->name);
+		free(hook->cmd);
+		alpm_list_free_inner(hook->triggers, (alpm_list_fn_free) _alpm_trigger_free);
+		alpm_list_free(hook->triggers);
+		FREELIST(hook->depends);
+		free(hook);
+	}
+}
+
+static int _alpm_hook_parse_cb(const char *file, int line,
+		const char *section, char *key, char *value, void *data)
+{
+	struct _alpm_hook_cb_ctx *ctx = data;
+	alpm_handle_t *handle = ctx->handle;
+	struct _alpm_hook_t *hook = ctx->hook;
+
+#define error(...) _alpm_log(handle, ALPM_LOG_ERROR, __VA_ARGS__); return 1;
+
+	if(!section && !key) {
+		error(_("error while reading hook %s: %s\n"), file, strerror(errno));
+	} else if(!section) {
+		error(_("hook %s line %d: invalid option %s\n"), file, line, key);
+	} else if(!key) {
+		/* beginning a new section */
+		if(strcmp(section, "Trigger") == 0) {
+			struct _alpm_trigger_t *t;
+			CALLOC(t, sizeof(struct _alpm_trigger_t), 1, return 1);
+			hook->triggers = alpm_list_add(hook->triggers, t);
+		} else if(strcmp(section, "Action") == 0) {
+			/* no special processing required */
+		} else {
+			error(_("hook %s line %d: invalid section %s\n"), file, line, section);
+		}
+	} else if(strcmp(section, "Trigger") == 0) {
+		struct _alpm_trigger_t *t = hook->triggers->prev->data;
+		if(strcmp(key, "Operation") == 0) {
+			if(strcmp(value, "Install") == 0) {
+				t->op |= ALPM_HOOK_OP_INSTALL;
+			} else if(strcmp(value, "Upgrade") == 0) {
+				t->op |= ALPM_HOOK_OP_UPGRADE;
+			} else if(strcmp(value, "Remove") == 0) {
+				t->op |= ALPM_HOOK_OP_REMOVE;
+			} else {
+				error(_("hook %s line %d: invalid value %s\n"), file, line, value);
+			}
+		} else if(strcmp(key, "Type") == 0) {
+			if(strcmp(value, "Package") == 0) {
+				t->type = ALPM_HOOK_TYPE_PACKAGE;
+			} else if(strcmp(value, "File") == 0) {
+				t->type = ALPM_HOOK_TYPE_FILE;
+			} else {
+				error(_("hook %s line %d: invalid value %s\n"), file, line, value);
+			}
+		} else if(strcmp(key, "Target") == 0) {
+			char *val;
+			STRDUP(val, value, return 1);
+			t->targets = alpm_list_add(t->targets, val);
+		} else {
+			error(_("hook %s line %d: invalid option %s\n"), file, line, key);
+		}
+	} else if(strcmp(section, "Action") == 0) {
+		if(strcmp(key, "When") == 0) {
+			if(strcmp(value, "PreTransaction") == 0) {
+				hook->when = ALPM_HOOK_PRE_TRANSACTION;
+			} else if(strcmp(value, "PostTransaction") == 0) {
+				hook->when = ALPM_HOOK_POST_TRANSACTION;
+			} else {
+				error(_("hook %s line %d: invalid value %s\n"), file, line, value);
+			}
+		} else if(strcmp(key, "Depends") == 0) {
+			char *val;
+			STRDUP(val, value, return 1);
+			hook->depends = alpm_list_add(hook->depends, val);
+		} else if(strcmp(key, "AbortOnFail") == 0) {
+			hook->abort_on_fail = 1;
+		} else if(strcmp(key, "Exec") == 0) {
+			STRDUP(hook->cmd, value, return 1);
+		} else {
+			error(_("hook %s line %d: invalid option %s\n"), file, line, value);
+		}
+	}
+
+#undef error
+
+	return 0;
+}
+
+/* vim: set noet: */

lib/libalpm/hook.h

@@ -0,0 +1,32 @@
+/*
+ *  hook.h
+ *
+ *  Copyright (c) 2015 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU 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/>.
+ */
+
+#ifndef _ALPM_HOOK_H
+#define _ALPM_HOOK_H
+
+#include "alpm.h"
+
+enum _alpm_hook_when_t {
+	ALPM_HOOK_PRE_TRANSACTION = 1,
+	ALPM_HOOK_POST_TRANSACTION
+};
+
+#endif /* _ALPM_HOOK_H */
+
+/* vim: set noet: */