[slave.mk]: Add list target (#856)

Add new target to list all available packages, files, docker images and
installers.

Signed-off-by: marian-pritsak <marianp@mellanox.com>

Author: marian-pritsak

README.buildsystem.md

@@ -201,4 +201,9 @@ sonic-slave environment is built only once, but if sonic-slave/Dockerfile was up
 $ make sonic-slave-build
 ```
 
+One can print out all available targets by executing the following command:
+```
+$ make list
+```
+
 All target groups are used by one or another recipe, so use those recipes as a reference when adding new ones.

slave.mk

@@ -52,6 +52,9 @@ configure :
 distclean : .platform clean
 	@rm -f .platform
 
+list :
+	@$(foreach target,$(SONIC_TARGET_LIST),echo $(target);)
+
 ###############################################################################
 ## Include other rules
 ###############################################################################
@@ -118,6 +121,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_COPY_DEBS)) : $(DEBS_PATH)/% : .platform
 	    { cp $($(deb)_PATH)/$(deb) $(DEBS_PATH)/ $(LOG) || exit 1 ; } ; )
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_COPY_DEBS))
+
 # Copy regular files from local directory
 # Add new package for copy:
 #     SOME_NEW_FILE = some_new_file
@@ -128,6 +133,8 @@ $(addprefix $(FILES_PATH)/, $(SONIC_COPY_FILES)) : $(FILES_PATH)/% : .platform
 	cp $($*_PATH)/$* $(FILES_PATH)/ $(LOG) || exit 1
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(FILES_PATH)/, $(SONIC_COPY_FILES))
+
 ###############################################################################
 ## Online targets
 ###############################################################################
@@ -143,6 +150,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_ONLINE_DEBS)) : $(DEBS_PATH)/% : .platform
 	    { wget --no-use-server-timestamps -O $(DEBS_PATH)/$(deb) $($(deb)_URL) $(LOG) || exit 1 ; } ; )
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_ONLINE_DEBS))
+
 # Download regular files from online location
 # Files are stored in deb packages directory for convenience
 # Add new file for download:
@@ -154,6 +163,8 @@ $(addprefix $(FILES_PATH)/, $(SONIC_ONLINE_FILES)) : $(FILES_PATH)/% : .platform
 	wget --no-use-server-timestamps -O  $@ $($*_URL) $(LOG)
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(FILES_PATH)/, $(SONIC_ONLINE_FILES))
+
 ###############################################################################
 ## Debian package related targets
 ###############################################################################
@@ -178,6 +189,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_MAKE_DEBS)) : $(DEBS_PATH)/% : .platform $$(a
 	if [ -f $($*_SRC_PATH).patch/series ]; then pushd $($*_SRC_PATH) && quilt pop -a -f; popd; fi
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_MAKE_DEBS))
+
 # Build project with dpkg-buildpackage
 # Add new package for build:
 #     SOME_NEW_DEB = some_new_deb.deb
@@ -199,6 +212,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_DPKG_DEBS)) : $(DEBS_PATH)/% : .platform $$(a
 	mv $(addprefix $($*_SRC_PATH)/../, $* $($*_DERIVED_DEBS) $($*_EXTRA_DEBS)) $(DEBS_PATH) $(LOG)
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_DPKG_DEBS))
+
 # Build project with python setup.py --command-packages=stdeb.command
 # Add new package for build:
 #     SOME_NEW_DEB = some_new_deb.deb
@@ -214,6 +229,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_PYTHON_STDEB_DEBS)) : $(DEBS_PATH)/% : .platf
 	mv $(addprefix $($*_SRC_PATH)/deb_dist/, $* $($*_DERIVED_DEBS)) $(DEBS_PATH) $(LOG)
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_PYTHON_STDEB_DEBS))
+
 # Rules for derived debian packages (dev, dbg, etc.)
 # All noise takes place in main deb recipe, so we are just telling that
 # we depend on it and move our deb to other targets
@@ -227,6 +244,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_DERIVED_DEBS)) : $(DEBS_PATH)/% : .platform $
 	[ -f $@ ] && touch $@
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_DERIVED_DEBS))
+
 # Rules for extra debian packages
 # All noise takes place in main deb recipe, so we are just telling that
 # we need to build the main deb and move our deb to other targets
@@ -240,6 +259,8 @@ $(addprefix $(DEBS_PATH)/, $(SONIC_EXTRA_DEBS)) : $(DEBS_PATH)/% : .platform $$(
 	[ -f $@ ] && touch $@
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_EXTRA_DEBS))
+
 # Targets for installing debian packages prior to build one that depends on them
 SONIC_INSTALL_TARGETS = $(addsuffix -install,$(addprefix $(DEBS_PATH)/, \
 			$(SONIC_ONLINE_DEBS) \
@@ -285,6 +306,8 @@ $(addprefix $(PYTHON_WHEELS_PATH)/, $(SONIC_PYTHON_WHEELS)) : $(PYTHON_WHEELS_PA
 	mv $($*_SRC_PATH)/dist/$* $(PYTHON_WHEELS_PATH) $(LOG)
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(PYTHON_WHEELS_PATH)/, $(SONIC_PYTHON_WHEELS))
+
 # Targets for installing python wheels.
 # Autogenerated
 SONIC_INSTALL_WHEELS = $(addsuffix -install, $(addprefix $(PYTHON_WHEELS_PATH)/, $(SONIC_PYTHON_WHEELS)))
@@ -314,6 +337,8 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_SIMPLE_DOCKER_IMAGES)) : $(TARGET_PATH)/%.g
 	docker save $* | gzip -c > $@
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(TARGET_PATH)/, $(SONIC_SIMPLE_DOCKER_IMAGES))
+
 # Targets for building docker images
 $(addprefix $(TARGET_PATH)/, $(SONIC_DOCKER_IMAGES)) : $(TARGET_PATH)/%.gz : .platform docker-start $$(addprefix $(DEBS_PATH)/,$$($$*.gz_DEPENDS)) $$(addprefix $(FILES_PATH)/,$$($$*.gz_FILES)) $$(addprefix $(PYTHON_WHEELS_PATH)/,$$($$*.gz_PYTHON_WHEELS)) $$(addsuffix -load,$$(addprefix $(TARGET_PATH)/,$$($$*.gz_LOAD_DOCKERS))) $$($$*.gz_PATH)/Dockerfile.j2
 	$(HEADER)
@@ -332,6 +357,8 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_DOCKER_IMAGES)) : $(TARGET_PATH)/%.gz : .pl
 	docker save $* | gzip -c > $@
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(TARGET_PATH)/, $(SONIC_DOCKER_IMAGES))
+
 DOCKER_LOAD_TARGETS = $(addsuffix -load,$(addprefix $(TARGET_PATH)/, \
 		      $(SONIC_SIMPLE_DOCKER_IMAGES) \
 		      $(SONIC_DOCKER_IMAGES)))
@@ -401,6 +428,8 @@ $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS)) : $(TARGET_PATH)/% : .platform
 	chmod a+x $@
 	$(FOOTER)
 
+SONIC_TARGET_LIST += $(addprefix $(TARGET_PATH)/, $(SONIC_INSTALLERS))
+
 ###############################################################################
 ## Clean targets
 ###############################################################################