Support for package "update" build profile action

* Add global HAIKU_PACKAGES_UPDATE_ONLY build system variable, which is
  set for the "update" and "update-all" build profile actions.
* Change the HAIKU_INCLUDE_IN_CONTAINER_VAR variable on packages to
  HAIKU_INCLUDE_IN_PACKAGES for all packages. The variable is also
  set for the "update" and "update-all" build profile actions.
* Introduce HAIKU_CONTAINER_INHERIT_UPDATE_VARIABLE on container
  variable. If set, the contained variable will be set on the container
  when one or more files in it are updated. It is set on packages so an
  update of a file in a package causes the package to be updated in the
  image.
* Introduce HAIKU_CONTAINER_ALWAYS_CREATE_DIRECTORIES on container
  variable. If set, directories will be created also in update mode. It
  is set on packages.

build/jam/ImageRules

@@ -177,6 +177,18 @@ rule AddFilesToContainer container : directoryTokens : targets : destName
 		if $(filterVar) {
 			targets = [ FilterContainerUpdateTargets $(targets)
 				: $(filterVar) ] ;
+
+			# If there are any targets, mark the container as to be included in
+			# an update, too, if it has set the update inheritance variable.
+			# This makes updating a target that lives in a package on an image
+			# work.
+			if $(targets) {
+				local updateVariable = [ on $(container) return
+					$(HAIKU_CONTAINER_INHERIT_UPDATE_VARIABLE) ] ;
+				if $(updateVariable) {
+					$(updateVariable) on $(container) = 1 ;
+				}
+			}
 		}
 	}
 
@@ -480,7 +492,9 @@ rule CreateContainerMakeDirectoriesScript container : script
 	# If the image shall only be updated, we don't create directories.
 	if $(dirsToCreate)
 		&& ( ! [ on $(container) return $(HAIKU_CONTAINER_UPDATE_ONLY) ]
-			|| [ IncludeAllTargetsInContainer $(container) ] ) {
+			|| [ IncludeAllTargetsInContainer $(container) ]
+			|| [ on $(container) return
+				$(HAIKU_CONTAINER_ALWAYS_CREATE_DIRECTORIES) ] ) {
 		Depends $(scriptBody) : $(dirsToCreate) ;
 		CreateContainerMakeDirectoriesScript1 $(scriptBody) : $(dirsToCreate) ;
 

build/jam/MiscRules

@@ -394,13 +394,17 @@ rule DefineBuildProfile name : type : path {
 		case "update" : {
 			JAM_TARGETS = $(buildTarget) ;
 			SetUpdateHaikuImageOnly 1 ;
+			HAIKU_PACKAGES_UPDATE_ONLY = 1 ;
 			HAIKU_INCLUDE_IN_IMAGE on $(HAIKU_BUILD_PROFILE_PARAMETERS) = 1 ;
+			HAIKU_INCLUDE_IN_PACKAGES on $(HAIKU_BUILD_PROFILE_PARAMETERS) = 1 ;
 		}
 
 		case "update-all" : {
 			JAM_TARGETS = $(buildTarget) ;
 			SetUpdateHaikuImageOnly 1 ;
+			HAIKU_PACKAGES_UPDATE_ONLY = 1 ;
 			HAIKU_INCLUDE_IN_IMAGE = 1 ;
+			HAIKU_INCLUDE_IN_PACKAGES = 1 ;
 		}
 
 		case "mount" : {

build/jam/PackageRules

@@ -268,13 +268,20 @@ rule HaikuPackage package
 	local grist = [ FHaikuPackageGrist $(package) ] ;
 
 	HAIKU_CONTAINER_GRIST on $(package) = $(grist) ;
-	HAIKU_INCLUDE_IN_CONTAINER_VAR on $(package)
+	HAIKU_INCLUDE_IN_CONTAINER_VAR on $(package) = HAIKU_INCLUDE_IN_PACKAGES ;
-		= $(grist)_HAIKU_INCLUDE_IN_PACKAGE ;
 	HAIKU_INSTALL_TARGETS_VAR on $(package)
 		= $(grist)_HAIKU_PACKAGE_INSTALL_TARGETS ;
 	HAIKU_CONTAINER_SYSTEM_DIR_TOKENS on $(package) = ;
 
 	HAIKU_CURRENTLY_BUILT_HAIKU_PACKAGE = $(package) ;
+
+	if $(HAIKU_PACKAGES_UPDATE_ONLY) {
+		HAIKU_CONTAINER_UPDATE_ONLY on $(package) = 1 ;
+		HAIKU_CONTAINER_INHERIT_UPDATE_VARIABLE on $(package)
+			= HAIKU_INCLUDE_IN_IMAGE ;
+	}
+
+	HAIKU_CONTAINER_ALWAYS_CREATE_DIRECTORIES on $(package) = 1 ;
 }
 
 
@@ -301,6 +308,8 @@ rule BuildHaikuPackage package : packageInfo
 	AddVariableToScript $(script) : tmpDir : $(tempDir) ;
 	AddVariableToScript $(script) : addBuildCompatibilityLibDir
 		: $(HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR) ;
+	AddVariableToScript $(script) : updateOnly
+		: [ on $(package) return $(HAIKU_CONTAINER_UPDATE_ONLY) ] ;
 	AddTargetVariableToScript $(script) : <build>addattr ;
 	AddTargetVariableToScript $(script) : <build>copyattr ;
 	AddTargetVariableToScript $(script) : <build>package ;

build/scripts/build_haiku_package

@@ -6,6 +6,7 @@ set -o errexit
 # outputDir
 # tmpDir
 # addBuildCompatibilityLibDir
+# updateOnly
 #
 # addattr
 # copyattr
@@ -23,7 +24,6 @@ fi
 packagePath="$1"
 packageInfoPath="$2"
 shift 2
-echo "Building package $1 with info $2..."
 
 if [ $# -gt 0 ]; then
 	. $1
@@ -61,5 +61,9 @@ done
 
 
 # create the package
+if [ ! $updateOnly ]; then
 	rm -f "$packagePath"
-$package create -i "$packageInfoPath" -C "$contentsDir" "$packagePath"
+	$package create -q -i "$packageInfoPath" -C "$contentsDir" "$packagePath"
+else
+	$package add -q -f -i "$packageInfoPath" -C "$contentsDir" "$packagePath" .
+fi