Move Deployment and BootconfigParser into libostree

As part of moving admin functionality there.  While we are doing this,
rename OtConfigParser to OstreeBootConfig parser since it's a better
name.

src/libostree/ostree-bootconfig-parser.c

@@ -0,0 +1,228 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2013 Colin Walters <walters@verbum.org>
+ *
+ * This program 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.
+ */
+
+#include "config.h"
+
+#include "ostree-bootconfig-parser.h"
+#include "libgsystem.h"
+
+struct _OstreeBootconfigParser
+{
+  GObject       parent_instance;
+
+  gboolean      parsed;
+  char         *separators;
+
+  GHashTable   *options;
+  GPtrArray    *lines;
+};
+
+typedef GObjectClass OstreeBootconfigParserClass;
+
+G_DEFINE_TYPE (OstreeBootconfigParser, ostree_bootconfig_parser, G_TYPE_OBJECT)
+
+gboolean
+ostree_bootconfig_parser_parse (OstreeBootconfigParser  *self,
+                                GFile           *path,
+                                GCancellable    *cancellable,
+                                GError         **error)
+{
+  gboolean ret = FALSE;
+  gs_free char *contents = NULL;
+  char **lines = NULL;
+  char **iter = NULL;
+
+  g_return_val_if_fail (!self->parsed, FALSE);
+
+  contents = gs_file_load_contents_utf8 (path, cancellable, error);
+  if (!contents)
+    goto out;
+
+  lines = g_strsplit (contents, "\n", -1);
+  for (iter = lines; *iter; iter++)
+    {
+      const char *line = *iter;
+      char *keyname = "";
+      
+      if (g_ascii_isalpha (*line))
+        {
+          char **items = NULL;
+          items = g_strsplit_set (line, self->separators, 2);
+          if (g_strv_length (items) == 2 && items[0][0] != '\0')
+            {
+              keyname = items[0];
+              g_hash_table_insert (self->options, items[0], items[1]);
+              g_free (items); /* Transfer ownership */
+            }
+          else
+            {
+              g_strfreev (items);
+            }
+        }
+      g_ptr_array_add (self->lines, g_variant_new ("(ss)", keyname, line));
+    }
+
+  self->parsed = TRUE;
+  
+  ret = TRUE;
+ out:
+  g_strfreev (lines);
+  return ret;
+}
+
+void
+ostree_bootconfig_parser_set (OstreeBootconfigParser  *self,
+                              const char      *key,
+                              const char      *value)
+{
+  g_hash_table_replace (self->options, g_strdup (key), g_strdup (value));
+}
+
+const char *
+ostree_bootconfig_parser_get (OstreeBootconfigParser  *self,
+                              const char      *key)
+{
+  return g_hash_table_lookup (self->options, key);
+}
+
+static gboolean
+write_key (OstreeBootconfigParser         *self,
+           GDataOutputStream      *out,
+           const char             *key,
+           const char             *value,
+           GCancellable           *cancellable,
+           GError                **error)
+{
+  gboolean ret = FALSE;
+
+  if (!g_data_output_stream_put_string (out, key, cancellable, error))
+    goto out;
+  if (!g_data_output_stream_put_byte (out, self->separators[0], cancellable, error))
+    goto out;
+  if (!g_data_output_stream_put_string (out, value, cancellable, error))
+    goto out;
+  if (!g_data_output_stream_put_byte (out, '\n', cancellable, error))
+    goto out;
+
+  ret = TRUE;
+ out:
+  return ret;
+}
+           
+gboolean
+ostree_bootconfig_parser_write (OstreeBootconfigParser   *self,
+                                GFile            *output,
+                                GCancellable     *cancellable,
+                                GError          **error)
+{
+  gboolean ret = FALSE;
+  GHashTableIter hashiter;
+  gpointer hashkey, hashvalue;
+  gs_unref_object GOutputStream *out = NULL;
+  gs_unref_object GDataOutputStream *dataout = NULL;
+  guint i;
+  gs_unref_hashtable GHashTable *written_overrides = NULL;
+
+  written_overrides = g_hash_table_new (g_str_hash, g_str_equal);
+
+  out = (GOutputStream*)g_file_replace (output, NULL, FALSE, 0, cancellable, error);
+  if (!out)
+    goto out;
+
+  dataout = g_data_output_stream_new (out);
+
+  for (i = 0; i < self->lines->len; i++)
+    {
+      GVariant *linedata = self->lines->pdata[i];
+      const char *key;
+      const char *value;
+      const char *line;
+
+      g_variant_get (linedata, "(&s&s)", &key, &line);
+
+      value = g_hash_table_lookup (self->options, key);
+      if (value == NULL)
+        {
+          if (!g_data_output_stream_put_string (dataout, line, cancellable, error))
+            goto out;
+          if (!g_data_output_stream_put_byte (dataout, '\n', cancellable, error))
+            goto out;
+        }
+      else
+        {
+          if (!write_key (self, dataout, key, value, cancellable, error))
+            goto out;
+          g_hash_table_insert (written_overrides, (gpointer)key, (gpointer)key);
+        }
+    }
+
+  g_hash_table_iter_init (&hashiter, self->options);
+  while (g_hash_table_iter_next (&hashiter, &hashkey, &hashvalue))
+    {
+      if (g_hash_table_lookup (written_overrides, hashkey))
+        continue;
+      if (!write_key (self, dataout, hashkey, hashvalue, cancellable, error))
+        goto out;
+    }
+
+  if (!g_output_stream_close ((GOutputStream*)dataout, cancellable, error))
+    goto out;
+
+  ret = TRUE;
+ out:
+  return ret;
+}
+
+static void
+ostree_bootconfig_parser_finalize (GObject *object)
+{
+  OstreeBootconfigParser *self = OSTREE_BOOTCONFIG_PARSER (object);
+
+  g_hash_table_unref (self->options);
+  g_ptr_array_unref (self->lines);
+  g_free (self->separators);
+
+  G_OBJECT_CLASS (ostree_bootconfig_parser_parent_class)->finalize (object);
+}
+
+static void
+ostree_bootconfig_parser_init (OstreeBootconfigParser *self)
+{
+  self->options = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+  self->lines = g_ptr_array_new ();
+}
+
+void
+ostree_bootconfig_parser_class_init (OstreeBootconfigParserClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->finalize = ostree_bootconfig_parser_finalize;
+}
+
+OstreeBootconfigParser *
+ostree_bootconfig_parser_new (void)
+{
+  OstreeBootconfigParser *self = NULL;
+
+  self = g_object_new (OSTREE_TYPE_BOOTCONFIG_PARSER, NULL);
+  self->separators = g_strdup (" \t");
+  return self;
+}