db: prefer local repositories, and implement --no-network

this helps boots sequence when network is not available.

src/apk.c

@@ -55,7 +55,8 @@ static struct apk_option generic_options[] = {
 	{ 0x107, "keys-dir",	"Override directory of trusted keys",
 				required_argument, "KEYSDIR" },
 	{ 0x108, "repositories-file", "Override repositories file",
-				required_argument, "REPOFILE" }
+				required_argument, "REPOFILE" },
+	{ 0x109, "no-network",	"Do not use network (cache is still used)" },
 };
 
 const char *apk_error_str(int error)
@@ -380,6 +381,9 @@ int main(int argc, char **argv)
 		case 0x105:
 			apk_wait = atoi(optarg);
 			break;
+		case 0x109:
+			apk_flags |= APK_NO_NETWORK;
+			break;
 		default:
 			if (applet == NULL || applet->parse == NULL ||
 			    applet->parse(ctx, &dbopts, r,

src/apk_database.h

@@ -98,6 +98,7 @@ struct apk_database {
 	unsigned name_id, num_repos;
 	const char *cache_dir;
 	int permanent;
+	unsigned int local_repos;
 
 	struct apk_dependency_array *world;
 	struct apk_string_array *protected_paths;
@@ -159,6 +160,8 @@ int apk_db_index_read_file(struct apk_database *db, const char *file, int repo);
 int apk_db_index_write(struct apk_database *db, struct apk_ostream *os);
 
 int apk_db_add_repository(apk_database_t db, apk_blob_t repository);
+struct apk_repository *apk_db_select_repo(struct apk_database *db,
+					  struct apk_package *pkg);
 int apk_repository_update(struct apk_database *db, struct apk_repository *repo);
 
 int apk_db_cache_active(struct apk_database *db);

src/apk_defines.h

@@ -63,6 +63,7 @@ extern unsigned int apk_flags;
 #define APK_PURGE		0x0200
 #define APK_INTERACTIVE		0x0400
 #define APK_RECURSIVE_DELETE	0x0800
+#define APK_NO_NETWORK		0x1000
 
 #define apk_error(args...)	do { apk_log("ERROR: ", args); } while (0)
 #define apk_warning(args...)	do { if (apk_verbosity > 0) { apk_log("WARNING: ", args); } } while (0)

src/apk_state.h

@@ -4,7 +4,7 @@
  * Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
  * All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify it 
+ * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation. See http://www.gnu.org/ for details.
  */
@@ -24,6 +24,7 @@ struct apk_change {
 
 struct apk_state {
 	unsigned int refs, num_names;
+	struct apk_database *db;
 	struct list_head change_list_head;
 	apk_name_state_t name[];
 };

src/cache.c

@@ -28,6 +28,7 @@ static int cache_download(struct apk_database *db)
 	struct apk_state *state;
 	struct apk_change *change;
 	struct apk_package *pkg;
+	struct apk_repository *repo;
 	char item[PATH_MAX], cacheitem[PATH_MAX];
 	int i, r = 0;
 
@@ -54,17 +55,13 @@ static int cache_download(struct apk_database *db)
 		if (faccessat(db->cache_fd, cacheitem, R_OK, 0) == 0)
 			continue;
 
-		for (i = 0; i < db->num_repos; i++) {
-			if (!(pkg->repos & BIT(i)))
-				continue;
+		repo = apk_db_select_repo(db, pkg);
+		if (repo == NULL)
+			continue;
 
-			apk_pkg_format_plain(pkg, APK_BLOB_BUF(item));
-			r = apk_cache_download(db, db->repos[i].url,
-					       item, cacheitem,
-					       APK_SIGN_VERIFY_IDENTITY);
-			if (r != 0)
-				return r;
-		}
+		apk_pkg_format_plain(pkg, APK_BLOB_BUF(item));
+		apk_cache_download(db, repo->url, item, cacheitem,
+				   APK_SIGN_VERIFY_IDENTITY);
 	}
 
 err:

src/database.c

@@ -1156,6 +1156,37 @@ static struct apk_bstream *apk_repository_file_open(struct apk_repository *repo,
 	return apk_bstream_from_url(tmp);
 }
 
+struct apk_repository *apk_db_select_repo(struct apk_database *db,
+					  struct apk_package *pkg)
+{
+	unsigned int repos = pkg->repos;
+	int i;
+
+	/* Always prefer local repositories */
+	if ((repos & db->local_repos) != 0)
+		repos &= db->local_repos;
+
+	/* Pick first repository providing this package */
+	for (i = 0; i < APK_MAX_REPOS; i++)
+		if (repos & BIT(i))
+			break;
+
+	if (i >= APK_MAX_REPOS)
+		return NULL;
+
+	/* If this is a remote repository, and we have no network,
+	 * check that we have it in cache */
+	if ((db->local_repos & BIT(i)) == 0 && (apk_flags & APK_NO_NETWORK)) {
+		char cacheitem[PATH_MAX];
+
+		apk_pkg_format_cache(pkg, APK_BLOB_BUF(cacheitem));
+		if (faccessat(db->cache_fd, cacheitem, R_OK, 0) != 0)
+			return NULL;
+	}
+
+	return &db->repos[i];
+}
+
 int apk_repository_update(struct apk_database *db, struct apk_repository *repo)
 {
 	char cacheitem[PATH_MAX];
@@ -1282,6 +1313,8 @@ int apk_db_add_repository(apk_database_t _db, apk_blob_t repository)
 			targz = 0;
 		}
 	} else {
+		db->local_repos |= BIT(r);
+
 		bs = apk_repository_file_open(repo, apkindex_tar_gz);
 		if (bs == NULL) {
 			bs = apk_repository_file_open(repo, apk_index_gz);
@@ -1686,22 +1719,18 @@ static int apk_db_unpack_pkg(struct apk_database *db,
 	struct apk_bstream *bs = NULL;
 	struct apk_istream *tar;
 	char file[PATH_MAX];
-	int r, i, need_copy = FALSE;
+	int r, need_copy = FALSE;
 
 	if (newpkg->filename == NULL) {
 		struct apk_repository *repo;
 
-		for (i = 0; i < APK_MAX_REPOS; i++)
-			if (newpkg->repos & BIT(i))
-				break;
-
-		if (i >= APK_MAX_REPOS) {
-			apk_error("%s-%s: not present in any repository",
+		repo = apk_db_select_repo(db, newpkg);
+		if (repo == NULL) {
+			apk_error("%s-%s: package is not currently available",
 				  newpkg->name->name, newpkg->version);
 			return -1;
 		}
 
-		repo = &db->repos[i];
 		if (apk_db_cache_active(db) &&
 		    repo->csum.type != APK_CHECKSUM_NONE) {
 			apk_pkg_format_cache(newpkg, APK_BLOB_BUF(file));

src/fetch.c

@@ -95,8 +95,9 @@ static int fetch_package(struct fetch_ctx *fctx,
 			 struct apk_package *pkg)
 {
 	struct apk_istream *is;
+	struct apk_repository *repo;
 	char pkgfile[PATH_MAX], url[PATH_MAX];
-	int r, i, fd;
+	int r, fd;
 
 	apk_pkg_format_plain(pkg, APK_BLOB_BUF(pkgfile));
 
@@ -110,12 +111,9 @@ static int fetch_package(struct fetch_ctx *fctx,
 	}
 
 	apk_message("Downloading %s-%s", pkg->name->name, pkg->version);
-	for (i = 0; i < APK_MAX_REPOS; i++)
-		if (pkg->repos & BIT(i))
-			break;
-
-	if (i >= APK_MAX_REPOS) {
-		apk_error("%s-%s: not present in any repository",
+	repo = apk_db_select_repo(db, pkg);
+	if (repo == NULL) {
+		apk_error("%s-%s: package is not currently available",
 			  pkg->name->name, pkg->version);
 		return -1;
 	}
@@ -123,8 +121,8 @@ static int fetch_package(struct fetch_ctx *fctx,
 	if (apk_flags & APK_SIMULATE)
 		return 0;
 
-	snprintf(url, sizeof(url), "%s%s%s", db->repos[i].url,
-		 db->repos[i].url[strlen(db->repos[i].url)-1] == '/' ? "" : "/",
+	snprintf(url, sizeof(url), "%s%s%s", repo->url,
+		 repo->url[strlen(repo->url)-1] == '/' ? "" : "/",
 		 pkgfile);
 
 	if (fctx->flags & FETCH_STDOUT) {

src/state.c

@@ -142,6 +142,7 @@ struct apk_state *apk_state_new(struct apk_database *db)
 	state = (struct apk_state*) calloc(1, num_bytes);
 	state->refs = 1;
 	state->num_names = db->name_id;
+	state->db = db;
 	list_init(&state->change_list_head);
 
 	/* Instantiate each 'name' target in world, and lockout incompatible
@@ -292,6 +293,10 @@ int apk_state_lock_dependency(struct apk_state *state,
 		if (apk_pkg_get_state(c->pkgs[i]) == APK_PKG_INSTALLED)
 			installed = pkg;
 
+		if (pkg->filename == NULL &&
+		    apk_db_select_repo(state->db, pkg) == NULL)
+			continue;
+
 		if (latest == NULL) {
 			latest = pkg;
 			continue;