Start moving add_lunch_combo to Make

Start deprecating add_lunch_combo, preferring a list of common choices
in each AndroidProducts.mk file.

This list will be validated so that we don't have typos:

https://android-review.git.corp.google.com/c/device/generic/car/+/619533

Or targets that no longer exist.

Bug: 77599627
Test: lunch
Test: lunch 34
Test: lunch aosp_x86_64-eng
Test: lunch aosp_<tab>
Change-Id: Ie0ddaa94cbd6cee26584f56f1706a8ec1333f87e

core/product.mk

@@ -41,21 +41,68 @@ $(foreach d, device vendor product,$(call _search-android-products-files-in-dir,
   $(SRC_TARGET_DIR)/product/AndroidProducts.mk
 endef
 
+#
+# For entries returned by get-product-makefiles, decode an entry to a short
+# product name. These either may be in the form of <name>:path/to/file.mk or
+# path/to/<name>.mk
+# $(1): The entry to decode
+#
+# Returns two words:
+#   <name> <file>
+#
+define _decode-product-name
+$(strip \
+  $(eval _cpm_words := $(subst :,$(space),$(1))) \
+  $(if $(word 2,$(_cpm_words)), \
+    $(wordlist 1,2,$(_cpm_words)), \
+    $(basename $(notdir $(1))) $(1)))
+endef
+
+#
+# Validates the new common lunch choices -- ensures that they're in an
+# appropriate form, and are paired with definitions of their products.
+# $(1): The new list of COMMON_LUNCH_CHOICES
+# $(2): The new list of PRODUCT_MAKEFILES
+#
+define _validate-common-lunch-choices
+$(strip $(foreach choice,$(1),\
+  $(eval _parts := $(subst -,$(space),$(choice))) \
+  $(if $(call math_lt,$(words $(_parts)),2), \
+    $(error $(LOCAL_DIR): $(choice): Invalid lunch choice)) \
+  $(if $(call math_gt_or_eq,$(words $(_parts)),4), \
+    $(error $(LOCAL_DIR): $(choice): Invalid lunch choice)) \
+  $(if $(filter-out eng userdebug user,$(word 2,$(_parts))), \
+    $(error $(LOCAL_DIR): $(choice): Invalid variant: $(word 2,$(_parts)))) \
+  $(if $(filter-out $(foreach p,$(2),$(call _decode-product-name,$(p))),$(word 1,$(_parts))), \
+    $(error $(LOCAL_DIR): $(word 1,$(_parts)): Product not defined in this file)) \
+  ))
+endef
+
 #
 # Returns the sorted concatenation of PRODUCT_MAKEFILES
 # variables set in the given AndroidProducts.mk files.
 # $(1): the list of AndroidProducts.mk files.
 #
+# As a side-effect, COMMON_LUNCH_CHOICES will be set to a
+# union of all of the COMMON_LUNCH_CHOICES definitions within
+# each AndroidProducts.mk file.
+#
 define get-product-makefiles
 $(sort \
+  $(eval _COMMON_LUNCH_CHOICES :=) \
   $(foreach f,$(1), \
     $(eval PRODUCT_MAKEFILES :=) \
+    $(eval COMMON_LUNCH_CHOICES :=) \
     $(eval LOCAL_DIR := $(patsubst %/,%,$(dir $(f)))) \
     $(eval include $(f)) \
+    $(call _validate-common-lunch-choices,$(COMMON_LUNCH_CHOICES),$(PRODUCT_MAKEFILES)) \
+    $(eval _COMMON_LUNCH_CHOICES += $(COMMON_LUNCH_CHOICES)) \
     $(PRODUCT_MAKEFILES) \
    ) \
   $(eval PRODUCT_MAKEFILES :=) \
   $(eval LOCAL_DIR :=) \
+  $(eval COMMON_LUNCH_CHOICES := $(sort $(_COMMON_LUNCH_CHOICES) $(LUNCH_MENU_CHOICES))) \
+  $(eval _COMMON_LUNCH_CHOICES :=) \
  )
 endef
 

core/product_config.mk

@@ -195,18 +195,13 @@ all_named_products :=
 current_product_makefile :=
 all_product_makefiles :=
 $(foreach f, $(all_product_configs),\
-    $(eval _cpm_words := $(subst :,$(space),$(f)))\
+    $(eval _cpm_words := $(call _decode-product-name,$(f)))\
     $(eval _cpm_word1 := $(word 1,$(_cpm_words)))\
     $(eval _cpm_word2 := $(word 2,$(_cpm_words)))\
-    $(if $(_cpm_word2),\
     $(eval all_product_makefiles += $(_cpm_word2))\
     $(eval all_named_products += $(_cpm_word1))\
     $(if $(filter $(TARGET_PRODUCT),$(_cpm_word1)),\
-            $(eval current_product_makefile += $(_cpm_word2)),),\
+        $(eval current_product_makefile += $(_cpm_word2)),))
-        $(eval all_product_makefiles += $(f))\
-        $(eval all_named_products += $(basename $(notdir $(f))))\
-        $(if $(filter $(TARGET_PRODUCT),$(basename $(notdir $(f)))),\
-            $(eval current_product_makefile += $(f)),)))
 _cpm_words :=
 _cpm_word1 :=
 _cpm_word2 :=

envsetup.sh

@@ -543,14 +543,6 @@ function add_lunch_combo()
     LUNCH_MENU_CHOICES=(${LUNCH_MENU_CHOICES[@]} $new_combo)
 }
 
-# add the default one here
-add_lunch_combo aosp_arm-eng
-add_lunch_combo aosp_arm64-eng
-add_lunch_combo aosp_mips-eng
-add_lunch_combo aosp_mips64-eng
-add_lunch_combo aosp_x86-eng
-add_lunch_combo aosp_x86_64-eng
-
 function print_lunch_menu()
 {
     local uname=$(uname)
@@ -561,7 +553,7 @@ function print_lunch_menu()
 
     local i=1
     local choice
-    for choice in ${LUNCH_MENU_CHOICES[@]}
+    for choice in $(TARGET_BUILD_APPS= LUNCH_MENU_CHOICES="${LUNCH_MENU_CHOICES[@]}" get_build_var COMMON_LUNCH_CHOICES)
     do
         echo "     $i. $choice"
         i=$(($i+1))
@@ -589,9 +581,10 @@ function lunch()
         selection=aosp_arm-eng
     elif (echo -n $answer | grep -q -e "^[0-9][0-9]*$")
     then
-        if [ $answer -le ${#LUNCH_MENU_CHOICES[@]} ]
+        local choices=($(TARGET_BUILD_APPS= LUNCH_MENU_CHOICES="${LUNCH_MENU_CHOICES[@]}" get_build_var COMMON_LUNCH_CHOICES))
+        if [ $answer -le ${#choices[@]} ]
         then
-            selection=${LUNCH_MENU_CHOICES[$(($answer-1))]}
+            selection=${choices[$(($answer-1))]}
         fi
     else
         selection=$answer
@@ -642,6 +635,7 @@ function lunch()
     destroy_build_var_cache
 }
 
+unset COMMON_LUNCH_CHOICES_CACHE
 # Tab completion for lunch.
 function _lunch()
 {
@@ -650,7 +644,11 @@ function _lunch()
     cur="${COMP_WORDS[COMP_CWORD]}"
     prev="${COMP_WORDS[COMP_CWORD-1]}"
 
-    COMPREPLY=( $(compgen -W "${LUNCH_MENU_CHOICES[*]}" -- ${cur}) )
+    if [ -z "$COMMON_LUNCH_CHOICES_CACHE" ]; then
+        COMMON_LUNCH_CHOICES_CACHE=$(TARGET_BUILD_APPS= LUNCH_MENU_CHOICES="${LUNCH_MENU_CHOICES[@]}" get_build_var COMMON_LUNCH_CHOICES)
+    fi
+
+    COMPREPLY=( $(compgen -W "${COMMON_LUNCH_CHOICES_CACHE}" -- ${cur}) )
     return 0
 }
 complete -F _lunch lunch

target/product/AndroidProducts.mk

@@ -79,3 +79,11 @@ PRODUCT_MAKEFILES := \
     $(LOCAL_DIR)/sdk_arm64.mk \
     $(LOCAL_DIR)/sdk_x86_64.mk
 endif
+
+COMMON_LUNCH_CHOICES := \
+    aosp_arm-eng \
+    aosp_arm64-eng \
+    aosp_mips-eng \
+    aosp_mips64-eng \
+    aosp_x86-eng \
+    aosp_x86_64-eng