upgrade: implement --ignore to exclude some packages from upgrade

src/apk_solver.h

@@ -35,6 +35,7 @@ struct apk_changeset {
 #define APK_SOLVERF_REINSTALL		0x0004
 #define APK_SOLVERF_LATEST		0x0008
 #define APK_SOLVERF_IGNORE_CONFLICT	0x0010
+#define APK_SOLVERF_IGNORE_UPGRADE 	0x0020
 
 void apk_solver_set_name_flags(struct apk_name *name,
 			       unsigned short solver_flags,

src/apk_solver_data.h

@@ -49,8 +49,8 @@ struct apk_solver_package_state {
 	unsigned short max_dep_chain;
 	unsigned short pinning_allowed;
 	unsigned short pinning_preferred;
-	unsigned solver_flags : 4;
-	unsigned solver_flags_inheritable : 4;
+	unsigned solver_flags : 6;
+	unsigned solver_flags_inheritable : 6;
 	unsigned seen : 1;
 	unsigned pkg_available : 1;
 	unsigned pkg_selectable : 1;

src/solver.c

@@ -551,7 +551,8 @@ static int compare_providers(struct apk_solver_state *ss,
 			return r;
 
 		/* Prefer installed on self-upgrade */
-		if (db->performing_self_upgrade && !(solver_flags & APK_SOLVERF_UPGRADE)) {
+		if ((db->performing_self_upgrade && !(solver_flags & APK_SOLVERF_UPGRADE)) ||
+		    (solver_flags & APK_SOLVERF_IGNORE_UPGRADE)) {
 			r = (pkgA->ipkg != NULL) - (pkgB->ipkg != NULL);
 			if (r)
 				return r;
@@ -580,7 +581,8 @@ static int compare_providers(struct apk_solver_state *ss,
 			return r;
 
 		/* Prefer installed */
-		if (!(solver_flags & APK_SOLVERF_UPGRADE)) {
+		if (!(solver_flags & APK_SOLVERF_UPGRADE) ||
+		    (solver_flags & APK_SOLVERF_IGNORE_UPGRADE)) {
 			r = (pkgA->ipkg != NULL) - (pkgB->ipkg != NULL);
 			if (r)
 				return r;

src/upgrade.c

@@ -22,6 +22,7 @@ struct upgrade_ctx {
 	unsigned short solver_flags;
 	int no_self_upgrade : 1;
 	int self_upgrade_only : 1;
+	int ignore : 1;
 };
 
 static int option_parse_applet(void *ctx, struct apk_db_options *dbopts, int optch, const char *optarg)
@@ -35,6 +36,9 @@ static int option_parse_applet(void *ctx, struct apk_db_options *dbopts, int opt
 	case 0x10001:
 		uctx->self_upgrade_only = 1;
 		break;
+	case 0x10002:
+		uctx->ignore = 1;
+		break;
 	case 'a':
 		uctx->solver_flags |= APK_SOLVERF_AVAILABLE;
 		break;
@@ -59,6 +63,8 @@ static const struct apk_option options_applet[] = {
 	{ 0x10000, "no-self-upgrade",
 	  "Do not do early upgrade of 'apk-tools' package" },
 	{ 0x10001, "self-upgrade-only", "Only do self-upgrade" },
+	{ 0x10002, "ignore", "Ignore the upgrade of PACKAGE.  Partial "
+	  "upgrades not supported, this might break your system."},
 };
 
 static const struct apk_option_group optgroup_applet = {
@@ -158,6 +164,15 @@ static int upgrade_main(void *ctx, struct apk_database *db, struct apk_string_ar
 	if (uctx->self_upgrade_only)
 		return 0;
 
+	if (uctx->ignore) {
+		char **pkg_name;
+		struct apk_name *name;
+		foreach_array_item(pkg_name, args) {
+			name = apk_db_get_name(db, APK_BLOB_STR(*pkg_name));
+			apk_solver_set_name_flags(name, solver_flags | APK_SOLVERF_IGNORE_UPGRADE, 0);
+		}
+	}
+
 	if (solver_flags & APK_SOLVERF_AVAILABLE) {
 		apk_dependency_array_copy(&world, db->world);
 		foreach_array_item(dep, world) {

test/upgrade2.test

+@ARGS
+--test-repo upgrade.repo
+--test-instdb upgrade.installed
+--test-world app
+upgrade --ignore app
+@EXPECT
+OK: 0 MiB in 2 packages