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glib/gio/gschema-compile.c
Ryan Lortie caae8ac57a Add --uninstall option to glib-compile-schemas 
If --uninstall is given then don't give an error if the schema directory
is empty.  Instead, erase the gschemas.compiled file, if it exists.
This is the right thing to do in the 'make uninstall' rule, where the
schema directory could very well be left empty as a result.

Modify gsettings.m4 to use this option.
2010-05-19 16:02:05 -04:00

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/*
* Copyright © 2010 Codethink Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include <gstdio.h>
#include <locale.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <gi18n.h>
#include "gvdb/gvdb-builder.h"
typedef struct
{
gboolean byteswap;
GVariantBuilder key_options;
GHashTable *schemas;
gchar *schemalist_domain;
GHashTable *schema;
GvdbItem *schema_root;
gchar *schema_domain;
GString *string;
GvdbItem *key;
GVariant *value;
GVariant *min, *max;
GString *choices;
gchar l10n;
gchar *context;
GVariantType *type;
} ParseState;
static gboolean allow_any_name = FALSE;
static gboolean
is_valid_keyname (const gchar *key,
GError **error)
{
gint i;
if (key[0] == '\0')
{
g_set_error_literal (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"empty names are not permitted");
return FALSE;
}
if (allow_any_name)
return TRUE;
if (!g_ascii_islower (key[0]))
{
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"invalid name '%s': names must begin "
"with a lowercase letter", key);
return FALSE;
}
for (i = 1; key[i]; i++)
{
if (key[i] != '-' &&
!g_ascii_islower (key[i]) &&
!g_ascii_isdigit (key[i]))
{
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"invalid name '%s': invalid character '%c'; "
"only lowercase letters, numbers and dash ('-') "
"are permitted.", key, key[i]);
return FALSE;
}
if (key[i] == '-' && key[i + 1] == '-')
{
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"invalid name '%s': two successive dashes ('--') are "
"not permitted.", key);
return FALSE;
}
}
if (key[i - 1] == '-')
{
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"invalid name '%s': the last character may not be a "
"dash ('-').", key);
return FALSE;
}
if (i > 32)
{
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"invalid name '%s': maximum length is 32", key);
return FALSE;
}
return TRUE;
}
static gboolean
type_allows_choices (const GVariantType *type)
{
if (g_variant_type_is_array (type) ||
g_variant_type_is_maybe (type))
return type_allows_choices (g_variant_type_element (type));
return g_variant_type_equal (type, G_VARIANT_TYPE_STRING);
}
static gboolean
type_allows_range (const GVariantType *type)
{
static const char range_types[] = "ynqiuxtd";
return strchr (range_types, *(const char*) type) != NULL;
}
static gboolean
is_valid_choices (GVariant *variant,
const gchar *choices)
{
switch (g_variant_classify (variant))
{
case G_VARIANT_CLASS_MAYBE:
case G_VARIANT_CLASS_ARRAY:
{
gsize i, n;
GVariant *child;
gboolean is_valid;
n = g_variant_n_children (variant);
for (i = 0; i < n; ++i)
{
child = g_variant_get_child_value (variant, i);
is_valid = is_valid_choices (child, choices);
g_variant_unref (child);
if (!is_valid)
return FALSE;
}
return TRUE;
}
case G_VARIANT_CLASS_STRING:
{
const gchar *string;
g_variant_get (variant, "&s", &string);
while ((choices = strstr (choices, string)) && choices[-1] != 0xff);
return choices != NULL;
}
default:
g_assert_not_reached ();
}
}
static void
start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
const GSList *element_stack;
const gchar *container;
element_stack = g_markup_parse_context_get_element_stack (context);
container = element_stack->next ? element_stack->next->data : NULL;
#define COLLECT(first, ...) \
g_markup_collect_attributes (element_name, \
attribute_names, attribute_values, error, \
first, __VA_ARGS__, G_MARKUP_COLLECT_INVALID)
#define OPTIONAL G_MARKUP_COLLECT_OPTIONAL
#define STRDUP G_MARKUP_COLLECT_STRDUP
#define STRING G_MARKUP_COLLECT_STRING
#define NO_ATTRS() COLLECT (G_MARKUP_COLLECT_INVALID, NULL)
if (container == NULL)
{
if (strcmp (element_name, "schemalist") == 0)
{
COLLECT (OPTIONAL | STRDUP,
"gettext-domain",
&state->schemalist_domain);
return;
}
}
else if (strcmp (container, "schemalist") == 0)
{
if (strcmp (element_name, "schema") == 0)
{
const gchar *id, *path;
if (COLLECT (STRING, "id", &id,
OPTIONAL | STRING, "path", &path,
OPTIONAL | STRDUP, "gettext-domain",
&state->schema_domain))
{
if (!g_hash_table_lookup (state->schemas, id))
{
state->schema = gvdb_hash_table_new (state->schemas, id);
state->schema_root = gvdb_hash_table_insert (state->schema, "");
if (path != NULL)
gvdb_hash_table_insert_string (state->schema,
".path", path);
}
else
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"<schema id='%s'> already specified", id);
}
return;
}
}
else if (strcmp (container, "schema") == 0)
{
if (strcmp (element_name, "key") == 0)
{
const gchar *name, *type;
if (COLLECT (STRING, "name", &name, STRING, "type", &type))
{
if (!is_valid_keyname (name, error))
return;
if (!g_hash_table_lookup (state->schema, name))
{
state->key = gvdb_hash_table_insert (state->schema, name);
gvdb_item_set_parent (state->key, state->schema_root);
}
else
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"<key name='%s'> already specified", name);
return;
}
if (g_variant_type_string_is_valid (type))
state->type = g_variant_type_new (type);
else
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"invalid GVariant type string '%s'", type);
return;
}
g_variant_builder_init (&state->key_options,
G_VARIANT_TYPE ("a{sv}"));
}
return;
}
else if (strcmp (element_name, "child") == 0)
{
const gchar *name, *schema;
if (COLLECT (STRING, "name", &name, STRING, "schema", &schema))
{
gchar *childname;
if (!is_valid_keyname (name, error))
return;
childname = g_strconcat (name, "/", NULL);
if (!g_hash_table_lookup (state->schema, childname))
gvdb_hash_table_insert_string (state->schema, childname, schema);
else
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"<child name='%s'> already specified", name);
g_free (childname);
return;
}
}
}
else if (strcmp (container, "key") == 0)
{
if (strcmp (element_name, "default") == 0)
{
const gchar *l10n;
if (COLLECT (STRING | OPTIONAL, "l10n", &l10n,
STRDUP | OPTIONAL, "context", &state->context))
{
if (l10n != NULL)
{
if (!g_hash_table_lookup (state->schema, ".gettext-domain"))
{
const gchar *domain = state->schema_domain ?
state->schema_domain :
state->schemalist_domain;
if (domain == NULL)
{
g_set_error_literal (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"l10n requested, but no "
"gettext domain given");
return;
}
gvdb_hash_table_insert_string (state->schema,
".gettext-domain",
domain);
if (strcmp (l10n, "messages") == 0)
state->l10n = 'm';
else if (strcmp (l10n, "time") == 0)
state->l10n = 't';
else
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"unsupported l10n category: %s", l10n);
return;
}
}
}
else
{
state->l10n = '\0';
if (state->context != NULL)
{
g_set_error_literal (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"translation context given for "
" value without l10n enabled");
return;
}
}
state->string = g_string_new (NULL);
}
return;
}
else if (strcmp (element_name, "summary") == 0 ||
strcmp (element_name, "description") == 0)
{
state->string = g_string_new (NULL);
NO_ATTRS ();
return;
}
else if (strcmp (element_name, "range") == 0)
{
const gchar *min_str, *max_str;
if (!type_allows_range (state->type))
{
gchar *type = g_variant_type_dup_string (state->type);
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"Element <%s> not allowed for keys of type \"%s\"\n",
element_name, type);
g_free (type);
return;
}
if (!COLLECT (STRING, "min", &min_str,
STRING, "max", &max_str))
return;
state->min = g_variant_parse (state->type, min_str, NULL, NULL, error);
if (state->min == NULL)
return;
state->max = g_variant_parse (state->type, max_str, NULL, NULL, error);
if (state->max == NULL)
return;
if (g_variant_compare (state->min, state->max) > 0)
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"Element <%s> specified minimum is greater than maxmimum",
element_name);
return;
}
g_variant_builder_add (&state->key_options, "{sv}", "range",
g_variant_new ("(@?@?)", state->min, state->max));
return;
}
else if (strcmp (element_name, "choices") == 0)
{
if (!type_allows_choices (state->type))
{
gchar *type = g_variant_type_dup_string (state->type);
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"Element <%s> not allowed for keys of type \"%s\"\n",
element_name, type);
g_free (type);
return;
}
state->choices = g_string_new ("\xff");
NO_ATTRS ();
return;
}
}
else if (strcmp (container, "choices") == 0)
{
if (strcmp (element_name, "choice") == 0)
{
const gchar *value;
if (COLLECT (STRING, "value", &value))
g_string_append_printf (state->choices, "%s\xff", value);
return;
}
}
if (container)
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
"Element <%s> not allowed inside <%s>\n",
element_name, container);
else
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
"Element <%s> not allowed at toplevel\n", element_name);
}
static void
end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
if (strcmp (element_name, "default") == 0)
{
state->value = g_variant_parse (state->type, state->string->str,
NULL, NULL, error);
if (state->value == NULL)
return;
if (state->l10n)
{
if (state->context)
{
gint len;
/* Contextified messages are supported by prepending the
* context, followed by '\004' to the start of the message
* string. We do that here to save GSettings the work
* later on.
*
* Note: we are about to g_free() the context anyway...
*/
len = strlen (state->context);
state->context[len] = '\004';
g_string_prepend_len (state->string, state->context, len + 1);
}
g_variant_builder_add (&state->key_options, "{sv}", "l10n",
g_variant_new ("(ys)",
state->l10n,
state->string->str));
}
g_string_free (state->string, TRUE);
state->string = NULL;
g_free (state->context);
state->context = NULL;
}
else if (strcmp (element_name, "key") == 0)
{
if (state->value == NULL)
{
g_set_error_literal (error,
G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"element <default> is required in <key>\n");
return;
}
if (state->min != NULL)
{
if (g_variant_compare (state->value, state->min) < 0 ||
g_variant_compare (state->value, state->max) > 0)
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"<default> is not contained in the specified range");
return;
}
state->min = state->max = NULL;
}
else if (state->choices != NULL)
{
if (!is_valid_choices (state->value, state->choices->str))
{
g_set_error_literal (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"<default> contains string not in <choices>");
return;
}
state->choices = NULL;
}
gvdb_item_set_value (state->key, state->value);
gvdb_item_set_options (state->key,
g_variant_builder_end (&state->key_options));
state->value = NULL;
}
else if (strcmp (element_name, "summary") == 0 ||
strcmp (element_name, "description") == 0)
{
g_string_free (state->string, TRUE);
state->string = NULL;
}
else if (strcmp (element_name, "choices") == 0)
{
gchar *choices;
choices = g_string_free (state->choices, FALSE);
g_variant_builder_add (&state->key_options, "{sv}", "choices",
g_variant_new_byte_array (choices, -1));
g_free (choices);
}
}
static void
text (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
gsize i;
for (i = 0; i < text_len; i++)
if (!g_ascii_isspace (text[i]))
{
if (state->string)
g_string_append_len (state->string, text, text_len);
else
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
"text may not appear inside <%s>\n",
g_markup_parse_context_get_element (context));
break;
}
}
static GHashTable *
parse_gschema_files (gchar **files,
gboolean byteswap,
GError **error)
{
GMarkupParser parser = { start_element, end_element, text };
GMarkupParseContext *context;
ParseState state = { byteswap, };
const gchar *filename;
context = g_markup_parse_context_new (&parser,
G_MARKUP_PREFIX_ERROR_POSITION,
&state, NULL);
state.schemas = gvdb_hash_table_new (NULL, NULL);
while ((filename = *files++) != NULL)
{
gchar *contents;
gsize size;
if (!g_file_get_contents (filename, &contents, &size, error))
return FALSE;
if (!g_markup_parse_context_parse (context, contents, size, error))
{
g_prefix_error (error, "%s: ", filename);
return FALSE;
}
if (!g_markup_parse_context_end_parse (context, error))
{
g_prefix_error (error, "%s: ", filename);
return FALSE;
}
}
return state.schemas;
}
int
main (int argc, char **argv)
{
gboolean byteswap = G_BYTE_ORDER != G_LITTLE_ENDIAN;
GError *error;
GHashTable *table;
GDir *dir;
const gchar *file;
gchar *srcdir;
gchar *targetdir = NULL;
gchar *target;
gboolean uninstall = FALSE;
gboolean dry_run = FALSE;
gchar **schema_files = NULL;
GOptionContext *context;
GOptionEntry entries[] = {
{ "targetdir", 0, 0, G_OPTION_ARG_FILENAME, &targetdir, N_("where to store the gschemas.compiled file"), N_("DIRECTORY") },
{ "dry-run", 0, 0, G_OPTION_ARG_NONE, &dry_run, N_("Do not write the gschema.compiled file"), NULL },
{ "uninstall", 0, 0, G_OPTION_ARG_NONE, &uninstall, N_("Do not give error for empty directory"), NULL },
{ "allow-any-name", 0, 0, G_OPTION_ARG_NONE, &allow_any_name, N_("Do not enforce key name restrictions") },
/* These options are only for use in the gschema-compile tests */
{ "schema-file", 0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_FILENAME_ARRAY, &schema_files, NULL, NULL },
{ NULL }
};
setlocale (LC_ALL, "");
context = g_option_context_new (N_("DIRECTORY"));
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_set_summary (context,
N_("Compile all GSettings schema files into a schema cache.\n"
"Schema files are required to have the extension .gschema.xml,\n"
"and the cache file is called gschemas.compiled."));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
error = NULL;
if (!g_option_context_parse (context, &argc, &argv, &error))
{
fprintf (stderr, "%s", error->message);
return 1;
}
g_option_context_free (context);
if (!schema_files && argc != 2)
{
fprintf (stderr, _("You should give exactly one directory name\n"));
return 1;
}
srcdir = argv[1];
if (targetdir == NULL)
targetdir = srcdir;
target = g_build_filename (targetdir, "gschemas.compiled", NULL);
if (!schema_files)
{
GPtrArray *files;
files = g_ptr_array_new ();
dir = g_dir_open (srcdir, 0, &error);
if (dir == NULL)
{
fprintf (stderr, "%s\n", error->message);
return 1;
}
while ((file = g_dir_read_name (dir)) != NULL)
{
if (g_str_has_suffix (file, ".gschema.xml"))
g_ptr_array_add (files, g_build_filename (srcdir, file, NULL));
}
if (files->len == 0)
{
if (uninstall)
{
g_unlink (target);
return 0;
}
else
{
fprintf (stderr, _("No schema files found\n"));
return 1;
}
}
g_ptr_array_add (files, NULL);
schema_files = (char **) g_ptr_array_free (files, FALSE);
}
if (!(table = parse_gschema_files (schema_files, byteswap, &error)) ||
(!dry_run && !gvdb_table_write_contents (table, target, byteswap, &error)))
{
fprintf (stderr, "%s\n", error->message);
return 1;
}
g_free (target);
return 0;
}
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