[PATCH v2 0/3] Makefile: fix issues with bin-wrappers/% rule

This simple topic fixes issues with the bin-wrappers/% rules, as seen in the range-diff below this never worked properly:

	make bin-wrappers/git

I.e. we'd make the scirpt, but not "git".

I originally sent this as [1] in response to a topic that's since landed, i.e. that topic needed to add more conditions to the "match this, but not that" part of the current rule.

As 3/3 notes that's because we were previously squashing 3 Makefile variables into one, and then having to heurisitcally match their contents to figure out which item originally came from which variable.

The 3/3 here simply avoids squashing all that data together, so we don't need to guess after the fact.

For the v2 I squashed the previous 3 commits together, they were incrementally improving the rule, now we do it all at once.

1. https://lore.kernel.org/git/cover-0.5-00000000000-20220901T130817Z-avarab@gmail.com/

Ævar Arnfjörð Bjarmason (3):
  Makefile: factor sed-powered '#!/bin/sh' munging into a variable
  Makefile: define "TEST_{PROGRAM,OBJS}" variables earlier
  Makefile: simplify $(test_bindir_programs) rule by splitting it up

 Makefile | 67 ++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 48 insertions(+), 19 deletions(-)

Range-diff against v1:
1:  40033143cdd = 1:  fc6c5a6a8df Makefile: factor sed-powered '#!/bin/sh' munging into a variable
2:  fe54dacaad2 = 2:  6dcb49f25c4 Makefile: define "TEST_{PROGRAM,OBJS}" variables earlier
3:  9d4ac628f0c ! 3:  400f487e30d Makefile: simplify $(test_bindir_programs) rule by splitting it up
    @@ Commit message
         Which will show an empty diff, i.e. we've correctly dealt with the
         combination of $(SHELL_PATH), $(X) and these three variables here.
     
    +    This also fixes an issue with the "bin-wrappers/" scripts have never had properly declared
    +    dependency information, i.e. this has never worked:
    +
    +            make clean &&
    +            make bin-wrappers/git &&
    +            # the script is there, but no "./git" is built
    +            ./bin-wrappers/git
    +
    +    There was no reason not to have that work, just as most things
    +    generated by the Makefile have proper dependency information.
    +
    +    Before this commit doing this would have been painful, but now it's
    +    easy to pass this as a parameter to our "bin_wrappers_template"
    +
         1. ea925196f1b (build dashless "bin-wrappers" directory similar to
            installed bindir, 2009-12-02)
         2. e6e7530d10b (test helpers: move test-* to t/helper/ subdirectory,
    @@ Makefile: GIT-PYTHON-VARS: FORCE
     +endef
      
     -all:: $(test_bindir_programs)
    -+BW_BINDIR_PROGRAMS_NEED_X = $(BINDIR_PROGRAMS_NEED_X:%=bin-wrappers/%)
    -+BIN_WRAPPERS += $(BW_BINDIR_PROGRAMS_NEED_X)
    -+$(BW_BINDIR_PROGRAMS_NEED_X): wrap-for-bin.sh
    -+	$(call mkdir_p_parent_template)
    -+	$(QUIET_GEN)$(call cmd_munge_bin_wrappers_script,$(@F),,$X)
    ++define bin_wrappers_template
    ++
    ++## bin_wrappers_template
    ++# 1 = $(1)
    ++# 2 = $(2)
    ++# 3 = $(3)
    ++# 4 = $(4)
    ++BW_$(1) = $$($(1):%=bin-wrappers/%)
    ++BIN_WRAPPERS += $$(BW_$(1))
    ++all:: $$(BW_$(1))
    ++$$(BW_$(1)): bin-wrappers/% : $(3)%$(4)
    ++$$(BW_$(1)): wrap-for-bin.sh
    ++	$$(call mkdir_p_parent_template)
    ++	$$(QUIET_GEN)$$(call cmd_munge_bin_wrappers_script,$(2),$(3),$(4))
    ++endef
      
     -bin-wrappers/%: wrap-for-bin.sh
    -+BW_BINDIR_PROGRAMS_NO_X = $(BINDIR_PROGRAMS_NO_X:%=bin-wrappers/%)
    -+BIN_WRAPPERS += $(BW_BINDIR_PROGRAMS_NO_X)
    -+$(BW_BINDIR_PROGRAMS_NO_X): wrap-for-bin.sh
    - 	$(call mkdir_p_parent_template)
    +-	$(call mkdir_p_parent_template)
     -	$(QUIET_GEN)sed -e $(call cmd_munge_script_sed_shell_path_arg) \
     -	     -e 's|@@BUILD_DIR@@|$(shell pwd)|' \
     -	     -e 's|@@PROG@@|$(patsubst test-%,t/helper/test-%,$(@F))$(if $(filter-out $(BINDIR_PROGRAMS_NO_X),$(@F)),$(X),)|' < $< > $@ && \
     -	chmod +x $@
    -+	$(QUIET_GEN)$(call cmd_munge_bin_wrappers_script,$(@F))
    -+
    -+BW_TEST_PROGRAMS_NEED_X = $(TEST_PROGRAMS_NEED_X:%=bin-wrappers/%)
    -+BIN_WRAPPERS += $(BW_TEST_PROGRAMS_NEED_X)
    -+$(BW_TEST_PROGRAMS_NEED_X): wrap-for-bin.sh
    -+	$(call mkdir_p_parent_template)
    -+	$(QUIET_GEN)$(call cmd_munge_bin_wrappers_script,$(@F),t/helper/,$X)
    ++define bin_wrappers_templates
    ++$(call bin_wrappers_template,BINDIR_PROGRAMS_NEED_X,'$$(@F)',,$$X)
    ++$(call bin_wrappers_template,BINDIR_PROGRAMS_NO_X,'$$(@F)')
    ++$(call bin_wrappers_template,TEST_PROGRAMS_NEED_X,'$$(@F)',t/helper/,$$X)
    ++endef
    ++$(eval $(call bin_wrappers_templates))
     +
     +all:: $(BIN_WRAPPERS)
      
4:  cbbf458433f < -:  ----------- Makefile: define bin-wrappers/% rules with a template
5:  560dee80b4a < -:  ----------- Makefile: fix "make clean && make bin-wrappers/$NAME" dependencies