#
# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

################################################################
#
# Check that GNU make and cygwin are recent enough.
# Setup common utility functions.
#
################################################################

ifndef _MAKEBASE_GMK
_MAKEBASE_GMK := 1

# If the variable that you want to send to stdout for piping into a file or otherwise,
# is potentially long, for example the a list of file paths, eg a list of all package directories.
# Then you need to use ListPathsSafely, which optimistically splits the output into several shell
# calls as well as use compression on recurrent file paths segments, to get around the potential
# command line length problem that exists in cygwin and other shells.
compress_pre:=$(strip $(shell $(CAT) $(SRC_ROOT)/common/makefiles/support/ListPathsSafely-pre-compress.incl))
compress_post:=$(strip $(shell $(CAT) $(SRC_ROOT)/common/makefiles/support/ListPathsSafely-post-compress.incl))
compress_paths=$(compress_pre)\
$(subst $(SRC_ROOT),X97,\
$(subst $(OUTPUT_ROOT),X98,\
$(subst X,X00,\
$(subst $(SPACE),\n,$(strip $1)))))\
$(compress_post)

decompress_paths=$(SED) -f $(SRC_ROOT)/common/makefiles/support/ListPathsSafely-uncompress.sed -e 's|X99|\\n|g' \
		     -e 's|X98|$(OUTPUT_ROOT)|g' -e 's|X97|$(SRC_ROOT)|g' \
		     -e 's|X00|X|g' | tr '\n' '$2'

define ListPathsSafely_If
    $(if $(word $3,$($1)),$(eval $1_LPS$3:=$(call compress_paths,$(wordlist $3,$4,$($1)))))
endef

define ListPathsSafely_Printf
    $(if $(strip $($1_LPS$4)),printf -- "$(strip $($1_LPS$4))\n" | $(decompress_paths) $3)
endef

# Receipt example:
#    rm -f thepaths
#    $(call ListPathsSafely,THEPATHS,\n, >> thepaths)
#    The \n argument means translate spaces into \n
#    if instead , , (a space) is supplied, then spaces remain spaces.
define ListPathsSafely
    $(if $(word 16001,$($1)),$(error Cannot list safely more than 16000 paths. $1 has $(words $($1)) paths!))
    $(call ListPathsSafely_If,$1,$2,1,250)
    $(call ListPathsSafely_If,$1,$2,251,500)
    $(call ListPathsSafely_If,$1,$2,501,750)
    $(call ListPathsSafely_If,$1,$2,751,1000)

    $(call ListPathsSafely_If,$1,$2,1001,1250)
    $(call ListPathsSafely_If,$1,$2,1251,1500)
    $(call ListPathsSafely_If,$1,$2,1501,1750)
    $(call ListPathsSafely_If,$1,$2,1751,2000)

    $(call ListPathsSafely_If,$1,$2,2001,2250)
    $(call ListPathsSafely_If,$1,$2,2251,2500)
    $(call ListPathsSafely_If,$1,$2,2501,2750)
    $(call ListPathsSafely_If,$1,$2,2751,3000)

    $(call ListPathsSafely_If,$1,$2,3001,3250)
    $(call ListPathsSafely_If,$1,$2,3251,3500)
    $(call ListPathsSafely_If,$1,$2,3501,3750)
    $(call ListPathsSafely_If,$1,$2,3751,4000)

    $(call ListPathsSafely_If,$1,$2,4001,4250)
    $(call ListPathsSafely_If,$1,$2,4251,4500)
    $(call ListPathsSafely_If,$1,$2,4501,4750)
    $(call ListPathsSafely_If,$1,$2,4751,5000)

    $(call ListPathsSafely_If,$1,$2,5001,5250)
    $(call ListPathsSafely_If,$1,$2,5251,5500)
    $(call ListPathsSafely_If,$1,$2,5501,5750)
    $(call ListPathsSafely_If,$1,$2,5751,6000)

    $(call ListPathsSafely_If,$1,$2,6001,6250)
    $(call ListPathsSafely_If,$1,$2,6251,6500)
    $(call ListPathsSafely_If,$1,$2,6501,6750)
    $(call ListPathsSafely_If,$1,$2,6751,7000)

    $(call ListPathsSafely_If,$1,$2,7001,7250)
    $(call ListPathsSafely_If,$1,$2,7251,7500)
    $(call ListPathsSafely_If,$1,$2,7501,7750)
    $(call ListPathsSafely_If,$1,$2,7751,8000)

    $(call ListPathsSafely_If,$1,$2,8001,8250)
    $(call ListPathsSafely_If,$1,$2,8251,8500)
    $(call ListPathsSafely_If,$1,$2,8501,8750)
    $(call ListPathsSafely_If,$1,$2,8751,9000)

    $(call ListPathsSafely_If,$1,$2,9001,9250)
    $(call ListPathsSafely_If,$1,$2,9251,9500)
    $(call ListPathsSafely_If,$1,$2,9501,9750)
    $(call ListPathsSafely_If,$1,$2,9751,10000)

    $(call ListPathsSafely_If,$1,$2,10001,10250)
    $(call ListPathsSafely_If,$1,$2,10251,10500)
    $(call ListPathsSafely_If,$1,$2,10501,10750)
    $(call ListPathsSafely_If,$1,$2,10751,11000)

    $(call ListPathsSafely_If,$1,$2,11001,11250)
    $(call ListPathsSafely_If,$1,$2,11251,11500)
    $(call ListPathsSafely_If,$1,$2,11501,11750)
    $(call ListPathsSafely_If,$1,$2,11751,12000)

    $(call ListPathsSafely_If,$1,$2,12001,12250)
    $(call ListPathsSafely_If,$1,$2,12251,12500)
    $(call ListPathsSafely_If,$1,$2,12501,12750)
    $(call ListPathsSafely_If,$1,$2,12751,13000)

    $(call ListPathsSafely_If,$1,$2,13001,13250)
    $(call ListPathsSafely_If,$1,$2,13251,13500)
    $(call ListPathsSafely_If,$1,$2,13501,13750)
    $(call ListPathsSafely_If,$1,$2,13751,14000)

    $(call ListPathsSafely_If,$1,$2,14001,14250)
    $(call ListPathsSafely_If,$1,$2,14251,14500)
    $(call ListPathsSafely_If,$1,$2,14501,14750)
    $(call ListPathsSafely_If,$1,$2,14751,15000)

    $(call ListPathsSafely_If,$1,$2,15001,15250)
    $(call ListPathsSafely_If,$1,$2,15251,15500)
    $(call ListPathsSafely_If,$1,$2,15501,15750)
    $(call ListPathsSafely_If,$1,$2,15751,16000)

    $(call ListPathsSafely_Printf,$1,$2,$3,1)
    $(call ListPathsSafely_Printf,$1,$2,$3,251)
    $(call ListPathsSafely_Printf,$1,$2,$3,501)
    $(call ListPathsSafely_Printf,$1,$2,$3,751)

    $(call ListPathsSafely_Printf,$1,$2,$3,1001)
    $(call ListPathsSafely_Printf,$1,$2,$3,1251)
    $(call ListPathsSafely_Printf,$1,$2,$3,1501)
    $(call ListPathsSafely_Printf,$1,$2,$3,1751)

    $(call ListPathsSafely_Printf,$1,$2,$3,2001)
    $(call ListPathsSafely_Printf,$1,$2,$3,2251)
    $(call ListPathsSafely_Printf,$1,$2,$3,2501)
    $(call ListPathsSafely_Printf,$1,$2,$3,2751)

    $(call ListPathsSafely_Printf,$1,$2,$3,3001)
    $(call ListPathsSafely_Printf,$1,$2,$3,3251)
    $(call ListPathsSafely_Printf,$1,$2,$3,3501)
    $(call ListPathsSafely_Printf,$1,$2,$3,3751)

    $(call ListPathsSafely_Printf,$1,$2,$3,4001)
    $(call ListPathsSafely_Printf,$1,$2,$3,4251)
    $(call ListPathsSafely_Printf,$1,$2,$3,4501)
    $(call ListPathsSafely_Printf,$1,$2,$3,4751)

    $(call ListPathsSafely_Printf,$1,$2,$3,5001)
    $(call ListPathsSafely_Printf,$1,$2,$3,5251)
    $(call ListPathsSafely_Printf,$1,$2,$3,5501)
    $(call ListPathsSafely_Printf,$1,$2,$3,5751)

    $(call ListPathsSafely_Printf,$1,$2,$3,6001)
    $(call ListPathsSafely_Printf,$1,$2,$3,6251)
    $(call ListPathsSafely_Printf,$1,$2,$3,6501)
    $(call ListPathsSafely_Printf,$1,$2,$3,6751)

    $(call ListPathsSafely_Printf,$1,$2,$3,7001)
    $(call ListPathsSafely_Printf,$1,$2,$3,7251)
    $(call ListPathsSafely_Printf,$1,$2,$3,7501)
    $(call ListPathsSafely_Printf,$1,$2,$3,7751)

    $(call ListPathsSafely_Printf,$1,$2,$3,8001)
    $(call ListPathsSafely_Printf,$1,$2,$3,8251)
    $(call ListPathsSafely_Printf,$1,$2,$3,8501)
    $(call ListPathsSafely_Printf,$1,$2,$3,8751)

    $(call ListPathsSafely_Printf,$1,$2,$3,9001)
    $(call ListPathsSafely_Printf,$1,$2,$3,9251)
    $(call ListPathsSafely_Printf,$1,$2,$3,9501)
    $(call ListPathsSafely_Printf,$1,$2,$3,9751)

    $(call ListPathsSafely_Printf,$1,$2,$3,10001)
    $(call ListPathsSafely_Printf,$1,$2,$3,10251)
    $(call ListPathsSafely_Printf,$1,$2,$3,10501)
    $(call ListPathsSafely_Printf,$1,$2,$3,10751)

    $(call ListPathsSafely_Printf,$1,$2,$3,11001)
    $(call ListPathsSafely_Printf,$1,$2,$3,11251)
    $(call ListPathsSafely_Printf,$1,$2,$3,11501)
    $(call ListPathsSafely_Printf,$1,$2,$3,11751)

    $(call ListPathsSafely_Printf,$1,$2,$3,12001)
    $(call ListPathsSafely_Printf,$1,$2,$3,12251)
    $(call ListPathsSafely_Printf,$1,$2,$3,12501)
    $(call ListPathsSafely_Printf,$1,$2,$3,12751)

    $(call ListPathsSafely_Printf,$1,$2,$3,13001)
    $(call ListPathsSafely_Printf,$1,$2,$3,13251)
    $(call ListPathsSafely_Printf,$1,$2,$3,13501)
    $(call ListPathsSafely_Printf,$1,$2,$3,13751)

    $(call ListPathsSafely_Printf,$1,$2,$3,14001)
    $(call ListPathsSafely_Printf,$1,$2,$3,14251)
    $(call ListPathsSafely_Printf,$1,$2,$3,14501)
    $(call ListPathsSafely_Printf,$1,$2,$3,14751)

    $(call ListPathsSafely_Printf,$1,$2,$3,15001)
    $(call ListPathsSafely_Printf,$1,$2,$3,15251)
    $(call ListPathsSafely_Printf,$1,$2,$3,15501)
    $(call ListPathsSafely_Printf,$1,$2,$3,15751)
endef

define ListPathsSafelyNow_IfPrintf
    ifneq (,$$(word $4,$$($1)))
        $$(eval $1_LPS$4:=$$(call compress_paths,$$(wordlist $4,$5,$$($1))))
        $$(shell printf -- "$$(strip $$($1_LPS$4))\n" | $(decompress_paths) $3)
    endif
endef

# And an non-receipt version:
define ListPathsSafelyNow
    ifneq (,$$(word 10001,$$($1)))
        $$(error Cannot list safely more than 10000 paths. $1 has $$(words $$($1)) paths!)
    endif
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1,250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,251,500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,501,750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,751,1000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1001,1250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1251,1500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1501,1750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1751,2000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2001,2250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2251,2500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2501,2750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2751,3000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3001,3250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3251,3500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3501,3750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3751,4000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4001,4250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4251,4500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4501,4750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4751,5000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5001,5250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5251,5500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5501,5750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5751,6000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6001,6250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6251,6500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6501,6750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6751,7000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7001,7250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7251,7500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7501,7750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7751,8000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8001,8250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8251,8500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8501,8750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8751,9000)

    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9001,9250)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9251,9500)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9501,9750)
    $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9751,10000)

endef

# The source tips can come from the Mercurial repository, or in the files
#   $(HGTIP_FILENAME) which contains the tip but is also positioned in the same
#   directory as the original $(HGDIR) directory.
#   These should not be := assignments, only used from the root Makefile.
HG_VERSION = $(shell $(HG) version 2> /dev/null)
HG_DIRECTORY=.hg
HGTIP_FILENAME=.hgtip
HG_SEARCH = ./REPO ./*/REPO ./*/*/REPO ./*/*/*/REPO
REPO_LIST = $(patsubst ./%,%,$(patsubst %/,%,$(sort $(dir \
    $(shell $(CD) $(SRC_ROOT) ; ( $(LS) -d $(HG_SEARCH:%/REPO=%/$(HG_DIRECTORY)) ; \
                                   $(LS)    $(HG_SEARCH:%/REPO=%/$(HGTIP_FILENAME)) ) \
	        2> /dev/null)))))

# Emit the repo:tip pairs to $@
define GetSourceTips
$(CD) $(SRC_ROOT) ; \
for i in $(REPO_LIST) IGNORE ; do \
  if [ "$${i}" = "IGNORE" ] ; then \
    continue; \
  elif [ -d $${i}/$(HG_DIRECTORY) -a "$(HG_VERSION)" != "" ] ; then \
    $(PRINTF) " %s:%s" \
      "$${i}" `$(HG) tip --repository $${i} --template '{node|short}\n'` ; \
  elif [ -f $${i}/$(HGTIP_FILENAME) ] ; then \
    $(PRINTF) " %s:%s" \
      "$${i}" `$(CAT) $${i}/$(HGTIP_FILENAME)` ; \
  fi; \
done >> $@
$(PRINTF) "\n" >> $@
endef

# Create the HGTIP_FILENAME file. Called from jdk/make/closed/bundles.gmk
define CreateHgTip
$(HG) tip --repository $1 --template '{node|short}\n' > $1/$(HGTIP_FILENAME);\
$(ECHO) $1/$(HGTIP_FILENAME)
endef

define SetupLogging
    ifeq ($$(LOG), trace)
        # Shell redefinition trick inspired by http://www.cmcrossroads.com/ask-mr-make/6535-tracing-rule-execution-in-gnu-make
        # For each target executed, will print
        # Building <TARGET> (from <FIRST PREREQUISITE>) (<ALL NEWER PREREQUISITES> newer)
        # but with a limit of 20 on <ALL NEWER PREREQUISITES>, to avoid cluttering logs too much (and causing a crash on Cygwin).
        OLD_SHELL:=$$(SHELL)
        WRAPPER_SHELL:=$$(OLD_SHELL) $$(SRC_ROOT)/common/bin/shell-tracer.sh $$(if $$(TIME),$$(TIME),-) $$(OUTPUT_ROOT)/build-trace-time.log $$(OLD_SHELL)
        SHELL=$$(warning $$(if $$@,Building $$@,Running shell command) $$(if $$<, (from $$<))$$(if $$?, ($$(wordlist 1, 20, $$?) $$(if $$(wordlist 21, 22, $$?), ... [in total $$(words $$?) files]) newer)))$$(WRAPPER_SHELL)
    endif
    # Never remove warning messages; this is just for completeness
    LOG_WARN= 
    ifneq ($$(findstring $$(LOG),info debug trace),)
        LOG_INFO=
    else
        LOG_INFO=> /dev/null
    endif
    ifneq ($$(findstring $$(LOG),debug trace),)
        LOG_DEBUG=
    else
        LOG_DEBUG=> /dev/null
    endif
    ifneq ($$(findstring $$(LOG),trace),)
        LOG_TRACE=
    else
        LOG_TRACE=> /dev/null
    endif
endef

# Make sure logging is setup for everyone that includes MakeBase.gmk.
$(eval $(call SetupLogging))

# This is to be called by all SetupFoo macros
define LogSetupMacroEntry
    $(if $(26),$(error Internal makefile error: Too many arguments to LogSetupMacroEntry, please update MakeBase.gmk))
    $(if $(findstring $(LOG),debug trace), $(info $1 $(foreach i,2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25,$(if $($i),$(NEWLINE) $(strip [$i] $($i))))))
endef

# Make directory without forking mkdir if not needed
define MakeDir
    ifneq ($$(wildcard $1 $2 $3 $4 $5 $6 $7 $8 $9),$$(strip $1 $2 $3 $4 $5 $6 $7 $8 $9))
        $$(shell $(MKDIR) -p $1 $2 $3 $4 $5 $6 $7 $8 $9)
    endif
endef

ifeq ($(OPENJDK_TARGET_OS),solaris)
# On Solaris, if the target is a symlink and exists, cp won't overwrite.
define install-file
	$(MKDIR) -p $(@D)
	$(RM) '$@'
	$(CP) -f -r -P '$<' '$(@D)'
endef
else ifeq ($(OPENJDK_TARGET_OS),macosx)
define install-file
	$(MKDIR) -p $(@D)
	$(CP) -fpRP '$<' '$@'
endef
else
define install-file
	$(MKDIR) -p $(@D)
	$(CP) -fP '$<' '$@'
endef
endif

# Convenience functions for working around make's limitations with $(filter ).
containing = $(foreach v,$2,$(if $(findstring $1,$v),$v))
not-containing = $(foreach v,$2,$(if $(findstring $1,$v),,$v))

################################################################################
# In Cygwin, finds are very costly, both because of expensive forks and because
# of bad file system caching. Find is used extensively in $(shell) commands to
# find source files. This makes rerunning make with no or few changes rather 
# expensive. To speed this up, these two macros are used to cache the results
# of simple find commands for reuse.
# 
# Runs a find and stores both the directories where it was run and the results.
# This macro can be called multiple times to add to the cache. Only finds files
# with no filters.
#
# Needs to be called with $(eval )
# 
# Param 1 - Dir to find in
ifeq ($(OPENJDK_BUILD_OS),windows)
define FillCacheFind
    FIND_CACHE_DIR += $1
    FIND_CACHE := $$(sort $$(FIND_CACHE) $$(shell $(FIND) $1 -type f -o -type l))
endef
else
define FillCacheFind
endef
endif

# Mimics find by looking in the cache if all of the directories have been cached.
# Otherwise reverts to shell find. This is safe to call on all platforms, even if
# cache is deactivated.
#
# The extra - is needed when FIND_CACHE_DIR is empty but should be harmless.
# Param 1 - Dirs to find in
define CacheFind
    $(if $(filter-out $(addsuffix %,- $(FIND_CACHE_DIR)),$1),\
        $(shell $(FIND) $1 -type f -o -type l),\
        $(filter $(addsuffix %,$1),$(FIND_CACHE)))
endef

################################################################################

endif # _MAKEBASE_GMK