run: add --depot-auto-update feature

If enabled, this option triggers the automated management of depot
content according to the needs of a run script.

Fixes #3270

tool/builddir/build.conf/run

@@ -3,3 +3,6 @@
 ## Run-tool configuration
 ##
 
+# create depot archives and update recipe versions automatically
+#RUN_OPT += --depot-auto-update
+

tool/builddir/build.mk

@@ -323,6 +323,7 @@ run/%: $(call select_from_repositories,run/%.run) $(RUN_ENV)
 	                                     --repositories "$(REPOSITORIES)" \
 	                                     --cross-dev-prefix "$(CROSS_DEV_PREFIX)" \
 	                                     --qemu-args "$(QEMU_OPT)" \
+	                                     --make "$(MAKE)" \
 	                                     $(RUN_OPT) \
 	                                     --include $(RUN_SCRIPT)
 

tool/depot/mk/build_bin_archive

@@ -25,6 +25,19 @@ export GENODE_DIR := $(realpath $(dir $(MAKEFILE_LIST))/../../..)
 include $(GENODE_DIR)/tool/depot/mk/front_end.inc
 
 
+#
+# Provide Genode build system with clean environment
+#
+unexport BASE_DIR
+unexport SPECS
+unexport SPEC_FILES
+unexport LIB_CACHE_DIR
+unexport LIB_DEP_FILE
+unexport LIB_PROGRESS_LOG
+unexport CONTRIB_DIR
+unexport REPOSITORIES
+
+
 #
 # The target is the name of the archive
 #

tool/run/depot.inc

@@ -183,9 +183,56 @@ proc _depot_contains_archive { user type name version } {
 }
 
 
+proc _depot_auto_update { archives } {
+
+	set archives_to_create { }
+	foreach archive $archives {
+
+		if {[regexp [_depot_archive_path_pattern] $archive dummy user type name]} {
+
+			if {$type == "pkg"} {
+				lappend archives_to_create "$user/pkg/[depot_spec]/$name" }
+
+			if {$type == "src"} {
+				lappend archives_to_create "$user/bin/[depot_spec]/$name" }
+
+			if {$type == "raw"} {
+				lappend archives_to_create "$user/raw/$name" }
+		}
+	}
+
+	# remove duplicates
+	set archives_to_create [lsort -unique $archives_to_create]
+
+	set    cmd "[genode_dir]/tool/depot/create $archives_to_create "
+	append cmd "CROSS_DEV_PREFIX=[cross_dev_prefix] "
+	append cmd "UPDATE_VERSIONS=1 FORCE=1 REBUILD= "
+
+	set make_j_arg ""
+	regexp {.*(-j\d*)} [get_cmd_arg_first --make ""] dummy make_j_arg
+	append cmd "$make_j_arg "
+
+	puts "update depot: $cmd"
+
+	exec {*}$cmd >@ stdout 2>@ stderr
+}
+
+
+# keep track of recursion to perform '_depot_auto_update' only at the top level
+set _collect_from_depot_nesting_level 0
+
+
 proc _collect_from_depot { archives } {
 
 	global _missing_depot_archives
+	global _collect_from_depot_nesting_level
+
+	incr _collect_from_depot_nesting_level
+
+	# fill depot with up-to-date content if --depot-auto-update is enabled
+	if {[get_cmd_switch --depot-auto-update]} {
+		if {$_collect_from_depot_nesting_level == 1} {
+			_depot_auto_update $archives } }
 
 	set all_content {}
 
@@ -234,6 +281,8 @@ proc _collect_from_depot { archives } {
 		}
 		set all_content [concat $all_content $content]
 	}
+
+	incr _collect_from_depot_nesting_level -1
 	return $all_content
 }