ifneq (,$(or $(ComSpec),$(COMSPEC),$(comspec)))
  ifneq (Cygwin,$(shell uname -a))
    NULL := /dev/null
    fixpath = $(1)
    emacspath = $(foreach f,$(1),$(shell cygpath -ma $(f)))
  else ifneq (,$(MSYSTEM))
    fixpath = $(foreach f,$(1),$(if $(subst $(f),,$(subst :,,$(f))),\
                $(subst //,/,/$(firstword $(subst :, ,$(f)))$(subst \,/,$(lastword $(subst :, ,$(f))))),$(f)))
    ifneq (,$(filter MSYS% MINGW%,$(MSYSTEM)))
      #$(info test: $(filter MSYS% MINGW%,$(MSYSTEM)))
      emacspath = $(foreach f,$(1),$(subst /,\\\\,$(shell cd $(f)&&pwd -W)))
    else
      RM     := del
      DIRSEP := $(if T,\)
      SHQ    := ^
      RD     := rmdir /q /s
    endif
  endif
endif

dummy :=
sp := $(dummy) $(dummy)
PARENO := (
PARENC := )

DIRSEP    ?= /
SHQ       ?= $(if T,\)
emacspath ?= $(1)
fixpath   ?= $(1)

TEST := test
RD   ?= rm -rf

NULL ?= $(or $(wildcard /dev/null),nul)

HG  := hg
GIT := git
BZR := bzr
SVN := svn
#BZR := "$(subst /,$(DIRSEP),$(or $(wildcard c:/Program?Files/Bazaar/bzr.exe),bzr))"
CVS := "$(subst /,$(DIRSEP),$(or $(wildcard c:/Program?Files/CVS?Suite/cvs.exe),cvs))"
#CVS := evs

CVSFLAGS := $(shell cvs --lf --version 2>$(NULL) >$(NULL)&&echo --lf)
CVSUP_FLAGS := -CPd

all: update

initrepos : subrepos

.PHONY: update subrepos clean-subrepos initrepos

define HG_TMPL
.PHONY: pull-$1
update: pull-$1
subrepos: $1
clean-subrepos: $1
DIR-$1 := $1
$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Creating[hg]: $(SHQ)'$$@$(SHQ)' from $(SHQ)'$2$(SHQ)'
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$(HG) clone $2 $$@

pull-$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Updating[hg]: $$(patsubst pull-%,%,$$@) $(SHQ)($2$(SHQ))
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$$(pre_up_cmd-$1)
	$(HG) -R $(subst /,$(DIRSEP),$(subst $(DOT_DIR)/,,$1)) pull $(HGPULL_FLAGS)
	$(HG) -R $(subst /,$(DIRSEP),$(subst $(DOT_DIR)/,,$1)) update $(HGPULL_FLAGS)
	$$(post_up_cmd-$1)

endef

define SVN_TMPL
.PHONY: up-$1
update: up-$1
subrepos: $1
clean-subrepos: $1
DIR-$1 := $1
$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Creating[svn]: $(SHQ)'$$@$(SHQ)' from $(SHQ)'$2$(SHQ)'
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$(SVN) checkout $2 $$@

up-$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Updating[svn]: $$(patsubst up-%,%,$$@) $(SHQ)($2$(SHQ))
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$$(pre_up_cmd-$1)
	@pushd $(subst /,$(DIRSEP),$1) >$(NULL) 2>&1 && $(SVN) $(SVNFLAGS) update $(SVNUP_FLAGS)
	$$(post_up_cmd-$1)

endef

define CVS_TMPL
.PHONY: up-$1
update: up-$1
DIR-$1 := $1
.PHONY: $1
initrepos: $1
$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Creating[cvs]: $(SHQ)'$$@$(SHQ)' from $(SHQ)'$2$(SHQ)'
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$(RD) $$@
	$(CVS) -z3 -d:$2 co $$@

up-$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Updating[cvs]: $$(patsubst up-%,%,$$@) $(SHQ)($2$(SHQ))
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$$(pre_up_cmd-$1)
	@pushd $(subst /,$(DIRSEP),$1) >$(NULL) 2>&1 && $(CVS) $(CVSFLAGS) up $(CVSUP_FLAGS)
	$$(post_up_cmd-$1)

endef

define GIT_TMPL
.PHONY: pull-$1
update: pull-$1
ifneq (,$(filter http:% https:%,$2))
  subrepos: $1
  clean-subrepos: $1
else
  .PHONY: $1
  initrepos: $1
endif
DIR-$1 := $1
$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Creating[git]: $(SHQ)'$$@$(SHQ)' from $(SHQ)'$2$(SHQ)'
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ifeq (,$(filter http:% https:%,$2))
	$(RD) $$@
endif
	$(GIT) clone $2 $$@

pull-$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Updating[git]: $$(patsubst pull-%,%,$$@) $(SHQ)($2$(SHQ))
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$$(pre_up_cmd-$1)
	@pushd $(subst /,$(DIRSEP),$1) >$(NULL) 2>&1 && $(GIT) pull $(GITPULL_FLAGS)
	$$(post_up_cmd-$1)

endef

define BZR_TMPL
.PHONY: pull-$1
update: pull-$1
subrepos: $1
clean-subrepos: $1
DIR-$1 := $1
$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Creating[bzr]: $(SHQ)'$$@$(SHQ)' from $(SHQ)'$2$(SHQ)'
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$(BZR) branch $2 $$@

pull-$1:
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	@echo +++ Updating[bzr]: $$(patsubst pull-%,%,$$@) $(SHQ)($2$(SHQ))
	@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	$$(pre_up_cmd-$1)
	pushd $(subst /,$(DIRSEP),$1) >$(NULL) 2>&1 && $(BZR) pull $(BZRPULL_FLAGS)
	$$(post_up_cmd-$1)

endef

clean-subrepos:
	echo $(RD) $^

#$(foreach dir,$(CVS_DIRS),$(info $(call CVS_UP_TMPL,$(dir))))
#$(foreach dir,$(GIT_DIRS),$(info $(call GIT_UP_TMPL,$(dir))))

#$(foreach dir,$(HG_DIRS) ,$(eval $(call  HG_UP_TMPL,$(dir))))
#$(foreach dir,$(CVS_DIRS),$(eval $(call CVS_UP_TMPL,$(dir))))
#$(foreach dir,$(SVN_DIRS),$(eval $(call SVN_UP_TMPL,$(dir))))
#$(foreach dir,$(GIT_DIRS),$(eval $(call GIT_UP_TMPL,$(dir))))
#$(foreach dir,$(BZR_DIRS),$(eval $(call BZR_UP_TMPL,$(dir))))


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