opkg: implement opkg_list_upgradable_packages function

git-svn-id: http://opkg.googlecode.com/svn/trunk@95 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358

3 files changed, 66 insertions, 6 deletions

diff --git a/libopkg/opkg.c b/libopkg/opkg.c
index b94ad55..209db6a 100644
--- a/libopkg/opkg.c
+++ b/libopkg/opkg.c
@@ -194,7 +194,7 @@ opkg_free (opkg_t *opkg)
 }
 
 int
-opkg_read_config_files (opkg_t *opkg)
+opkg_re_read_config_files (opkg_t *opkg)
 {
   args_t *a;
   opkg_conf_t *c;
@@ -734,3 +734,53 @@ opkg_list_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_d
   return 0;
 }
 
+int
+opkg_list_upgradable_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_data)
+{
+  pkg_vec_t *all;
+  int i;
+
+  opkg_assert (opkg);
+  opkg_assert (callback);
+
+  all = pkg_vec_alloc ();
+  pkg_hash_fetch_available (&opkg->conf->pkg_hash, all);
+  for (i = 0; i < all->len; i++)
+  {
+    pkg_t *old, *new;
+    int cmp;
+    opkg_package_t *package;
+
+    old = all->pkgs[i];
+    
+    if (old->state_status != SS_INSTALLED)
+      continue;
+
+    new = pkg_hash_fetch_best_installation_candidate_by_name(opkg->conf, old->name);
+    if (new == NULL) {
+      /* XXX: Notice: Assuming locally install package is up to date */
+      continue;
+    }
+          
+    cmp = pkg_compare_versions(old, new);
+
+    if (cmp < 0)
+    {
+
+      package = opkg_package_new_with_values (
+          old->name,
+          old->version,
+          old->architecture,
+          old->description,
+          old->tags,
+          (old->state_status == SS_INSTALLED));
+
+      callback (opkg, package, user_data);
+    }
+  }
+
+  pkg_vec_free (all);
+
+  return 0;
+}
+
diff --git a/libopkg/opkg.h b/libopkg/opkg.h
index a6decd5..4dda6c7 100644
--- a/libopkg/opkg.h
+++ b/libopkg/opkg.h
@@ -41,7 +41,7 @@ opkg_t* opkg_new ();
 void opkg_free (opkg_t *opkg);
 void opkg_get_option (opkg_t *opkg, char *option, void **value);
 void opkg_set_option (opkg_t *opkg, char *option, void *value);
-int opkg_read_config_files (opkg_t *opkg);
+int opkg_re_read_config_files (opkg_t *opkg);
 
 int opkg_install_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t callback, void *user_data);
 int opkg_remove_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t callback, void *user_data);
@@ -50,3 +50,4 @@ int opkg_upgrade_all (opkg_t *opkg, opkg_progress_callback_t callback, void *use
 int opkg_update_package_lists (opkg_t *opkg, opkg_progress_callback_t callback, void *user_data);
 
 int opkg_list_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_data);
+int opkg_list_upgradable_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_data);
diff --git a/tests/libopkg_test.c b/tests/libopkg_test.c
index ac61738..fe1cefd 100644
--- a/tests/libopkg_test.c
+++ b/tests/libopkg_test.c
@@ -26,6 +26,12 @@ package_list_callback (opkg_t *opkg, opkg_package_t *pkg, void *data)
   opkg_package_free (pkg);
 }
 
+void
+package_list_upgradable_callback (opkg_t *opkg, opkg_package_t *pkg, void *data)
+{
+  printf ("%s - %s\n", pkg->name, pkg->version);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -36,7 +42,7 @@ main (int argc, char **argv)
 
   opkg_set_option (opkg, "offline_root", "/tmp/");
 
-  opkg_read_config_files (opkg);
+  opkg_re_read_config_files (opkg);
 
   err = opkg_update_package_lists (opkg, progress_callback, "Updating...");
   printf ("\nopkg_update_package_lists returned %d\n", err);
@@ -47,12 +53,15 @@ main (int argc, char **argv)
   err = opkg_upgrade_package (opkg, "aspell", progress_callback, "Upgrading...");
   printf ("\nopkg_upgrade_package returned %d\n", err);
 
-  err = opkg_upgrade_all (opkg, progress_callback, "Upgrading all...");
-  printf ("\nopkg_upgrade_package returned %d\n", err);
-
   err = opkg_remove_package (opkg, "aspell", progress_callback, "Removing...");
   printf ("\nopkg_remove_package returned %d\n", err);
 
+  printf ("Listing upgradable packages...\n");
+  opkg_list_upgradable_packages (opkg, package_list_upgradable_callback, NULL);
+
+  err = opkg_upgrade_all (opkg, progress_callback, "Upgrading all...");
+  printf ("\nopkg_upgrade_all returned %d\n", err);
+
   opkg_list_packages (opkg, package_list_callback, NULL);
   printf ("\n");