#
# Copyright (c) 2011, 2015, 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.
#

################################################################
#
# Setup common utility functions.
#
################################################################

ifndef _MAKEBASE_GMK
_MAKEBASE_GMK := 1

ifeq ($(wildcard $(SPEC)),)
  $(error MakeBase.gmk needs SPEC set to a proper spec.gmk)
endif

# By defining this pseudo target, make will automatically remove targets
# if their recipe fails so that a rebuild is automatically triggered on the
# next make invocation.
.DELETE_ON_ERROR:

##############################
# Functions
##############################

### Debug functions

# Prints the name and value of a variable
PrintVar = \
    $(info $(strip $1) >$($(strip $1))<)

### Functions for timers

# Store the build times in this directory.
BUILDTIMESDIR=$(OUTPUT_ROOT)/make-support/build-times

# Record starting time for build of a sub repository.
define RecordStartTime
	$(MKDIR) -p $(BUILDTIMESDIR)
	$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_start_$(strip $1)
	$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_start_$(strip $1)_human_readable
endef

# Record ending time and calculate the difference and store it in a
# easy to read format. Handles builds that cross midnight. Expects
# that a build will never take 24 hours or more.
define RecordEndTime
	$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_end_$(strip $1)
	$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_end_$(strip $1)_human_readable
	$(ECHO) `$(CAT) $(BUILDTIMESDIR)/build_time_start_$(strip $1)` `$(CAT) $(BUILDTIMESDIR)/build_time_end_$(strip $1)` $1 | \
	    $(NAWK) '{ F=$$7; T=$$14; if (F > T) { T+=3600*24 }; D=T-F; H=int(D/3600); \
	    M=int((D-H*3600)/60); S=D-H*3600-M*60; printf("%02d:%02d:%02d %s\n",H,M,S,$$15); }' \
	    > $(BUILDTIMESDIR)/build_time_diff_$(strip $1)
endef

# Hook to be called when starting to execute a top-level target
define TargetEnter
	$(PRINTF) "## Starting $(patsubst %-only,%,$@)\n"
	$(call RecordStartTime,$(patsubst %-only,%,$@))
endef

# Hook to be called when finish executing a top-level target
define TargetExit
	$(call RecordEndTime,$(patsubst %-only,%,$@))
	$(PRINTF) "## Finished $(patsubst %-only,%,$@) (build time %s)\n\n" \
	    "`$(CAT) $(BUILDTIMESDIR)/build_time_diff_$(patsubst %-only,%,$@) | $(CUT) -f 1 -d ' '`"
endef

################################################################################
# This macro translates $ into \$ to protect the $ from expansion in the shell.
# To make this macro resilient against already escaped strings, first remove
# any present escapes before escaping so that no double escapes are added.
EscapeDollar = $(subst $$,\$$,$(subst \$$,$$,$(strip $1)))

################################################################################
# This macro translates $ into $$ to protect the string from make itself.
DoubleDollar = $(subst $$,$$$$,$(strip $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) $(SRC_ROOT)/make/common/support/ListPathsSafely-pre-compress.incl))
compress_post:=$(strip $(shell $(CAT) $(SRC_ROOT)/make/common/support/ListPathsSafely-post-compress.incl))
compress_paths=$(compress_pre)\
$(subst $(SRC_ROOT),X97,\
$(subst $(OUTPUT_ROOT),X98,\
$(subst X,X00,\
$(subst $(SPACE),\n,$(strip $1)))))\
$(compress_post)

decompress_paths=$(SED) -f $(SRC_ROOT)/make/common/support/ListPathsSafely-uncompress.sed -e 's|X99|\\n|g' \
    -e 's|X98|$(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$4)),$(if $(findstring $(LOG_LEVEL),trace),,@)printf \
	    -- "$(strip $(call EscapeDollar, $($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!))
	$(ECHO) $(LOG_DEBUG) Writing $(words $($1)) paths to '$3'
	$(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)) \
            $(HG_SEARCH:%/REPO=%/$(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 ($$(LOG_LEVEL), trace)
    # Shell redefinition trick inspired by http://www.cmcrossroads.com/ask-mr-make/6535-tracing-rule-execution-in-gnu-make
    # For each target executed, will print
    # Building <TARGET> (from <FIRST PREREQUISITE>) (<ALL NEWER PREREQUISITES> newer)
    # but with a limit of 20 on <ALL NEWER PREREQUISITES>, to avoid cluttering logs too much
    # (and causing a crash on Cygwin).
    # Default shell seems to always be /bin/sh. Must override with bash to get this to work on Solaris.
    # Only use time if it's GNU time which supports format and output file.
    WRAPPER_SHELL := $$(BASH) $$(SRC_ROOT)/common/bin/shell-tracer.sh $$(if $$(findstring yes,$$(IS_GNU_TIME)),$$(TIME),-) $$(OUTPUT_ROOT)/build-trace-time.log $$(SHELL)
    SHELL := $$(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_LEVEL), info debug trace),)
    LOG_INFO :=
  else
    LOG_INFO := > /dev/null
  endif
  ifneq ($$(findstring $$(LOG_LEVEL), debug trace),)
    LOG_DEBUG :=
  else
    LOG_DEBUG := > /dev/null
  endif
  ifneq ($$(findstring $$(LOG_LEVEL), trace),)
    LOG_TRACE :=
  else
    LOG_TRACE := > /dev/null
  endif
endef

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

################################################################################
# Creates a sequence of increasing numbers (inclusive).
# Param 1 - starting number
# Param 2 - ending number
sequence = \
    $(wordlist $1, $2, $(strip \
        $(eval SEQUENCE_COUNT :=) \
        $(call _sequence-do,$(strip $2))))

_sequence-do = \
    $(if $(word $1, $(SEQUENCE_COUNT)),, \
      $(eval SEQUENCE_COUNT += .) \
      $(words $(SEQUENCE_COUNT)) \
      $(call _sequence-do,$1))

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

MAX_PARAMS := 30
PARAM_SEQUENCE := $(call sequence, 2, $(MAX_PARAMS))

# Template for creating a macro taking named parameters. To use it, assign the
# template to a variable with the name you want for your macro, using '='
# assignment. Then define a macro body with the suffix "Body". The Body macro
# should take 1 parameter which should be a unique string for that invocation
# of the macro.
# Ex:
# SetupFoo = $(NamedParamsMacroTemplate)
# define SetupFooBody
#   # do something
#   # access parameters as $$($1_BAR)
# endef
# Call it like this
# $(eval $(call SetupFoo, BUILD_SOMETHING, \
#     BAR := some parameter value, \
# ))
define NamedParamsMacroTemplate
  $(if $($(MAX_PARAMS)),$(error Internal makefile error: \
      Too many named arguments to macro, please update MAX_PARAMS in MakeBase.gmk))
  # Iterate over 2 3 4... and evaluate the named parameters with $1_ as prefix
  $(foreach i,$(PARAM_SEQUENCE), $(if $(strip $($i)),\
    $(strip $1)_$(strip $($i)))$(NEWLINE))
  # Debug print all named parameter names and values
  $(if $(findstring $(LOG_LEVEL),debug trace), \
    $(info $0 $(strip $1) $(foreach i,$(PARAM_SEQUENCE), \
      $(if $(strip $($i)),$(NEWLINE) $(strip [$i] $(if $(filter $(LOG_LEVEL), trace), \
        $($i), $(wordlist 1, 20, $($(i))) $(if $(word 21, $($(i))), ...)))))))

  $(if $(DEBUG_$(strip $1)),
    $(info -------- <<< Begin expansion of $(strip $1)) \
    $(info $(call $(0)Body,$(strip $1))) \
    $(info -------- >>> End expansion of $(strip $1)) \
  )

  $(call $(0)Body,$(strip $1))
endef

################################################################################
# Make directory without forking mkdir if not needed
MakeDir = \
    $(strip $(if $(subst $(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)))

################################################################################
# Assign a variable only if it is empty
# Param 1 - Variable to assign
# Param 2 - Value to assign
SetIfEmpty = \
    $(if $($(strip $1)),,$(eval $(strip $1) := $2))

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

ifeq ($(OPENJDK_TARGET_OS),solaris)
  # On Solaris, if the target is a symlink and exists, cp won't overwrite.
  # Cp has to operate in recursive mode to allow for -P flag, to preserve soft links. If the
  # name of the target file differs from the source file, rename after copy.
  # If the source and target parent directories are the same, recursive copy doesn't work
  # so we fall back on regular copy, which isn't preserving symlinks.
  define install-file
	$(MKDIR) -p '$(@D)'
	$(RM) '$@'
	if [ "$(@D)" != "$(<D)" ]; then \
	  $(CP) -f -r -P '$<' '$(@D)'; \
	  if [ "$(@F)" != "$(<F)" ]; then \
	    $(MV) '$(@D)/$(<F)' '$@'; \
	  fi; \
	else \
	  if [ -L '$<' ]; then \
	    $(ECHO) "Source file is a symlink and target is in the same directory: $< $@" ; \
	    exit 1; \
	  fi; \
	  $(CP) -f '$<' '$@'; \
	fi
  endef
else ifeq ($(OPENJDK_TARGET_OS),macosx)
  # On mac, extended attributes sometimes creep into the source files, which may later
  # cause the creation of ._* files which confuses testing. Clear these with xattr if
  # set. Some files get their write permissions removed after being copied to the
  # output dir. When these are copied again to images, xattr would fail. By only clearing
  # attributes when they are present, failing on this is avoided.
  define install-file
	$(MKDIR) -p '$(@D)'
	$(CP) -fRP '$<' '$@'
	if [ -n "`$(XATTR) -l '$@'`" ]; then $(XATTR) -c '$@'; fi
  endef
else
  # Running mkdir and cp in the same shell speeds up copy intensive tasks in Cygwin
  # significantly.
  define install-file
	$(MKDIR) -p '$(@D)' && $(CP) -fP '$<' '$@'
  endef
endif

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

# Filter out duplicate sub strings while preserving order. Keeps the first occurance.
uniq = \
    $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))

# Return a list of all string elements that are duplicated in $1.
dups = \
    $(strip $(foreach v, $(sort $1), $(if $(filter-out 1, \
        $(words $(filter $v, $1))), $v)))

# String equals
equals = \
    $(and $(findstring $(strip $1),$(strip $2)),\
        $(findstring $(strip $2),$(strip $1)))

# Remove a whole list of prefixes
# $1 - List of prefixes
# $2 - List of elements to process
remove-prefixes = \
    $(strip $(if $1,$(patsubst $(firstword $1)%,%,\
      $(call remove-prefixes,$(filter-out $(firstword $1),$1),$2)),$2))

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

ifneq ($(DISABLE_CACHE_FIND), true)
  # 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 )
  #
  # Even if the performance benifit is negligible on other platforms, keep the
  # functionality active unless explicitly disabled to exercise it more.
  #
  # Initialize FIND_CACHE_DIRS with := to make it a non recursively-expanded variable
  FIND_CACHE_DIRS :=
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define FillCacheFind
    # Filter out already cached dirs. The - is needed when FIND_CACHE_DIRS is empty
    # since filter out will then return empty.
    FIND_CACHE_NEW_DIRS := $$(filter-out $$(addsuffix /%,\
        - $(FIND_CACHE_DIRS)) $(FIND_CACHE_DIRS), $1)
    ifneq ($$(FIND_CACHE_NEW_DIRS), )
      # Remove any trailing slash from dirs in the cache dir list
      FIND_CACHE_DIRS += $$(patsubst %/,%, $$(FIND_CACHE_NEW_DIRS))
      FIND_CACHE := $$(sort $$(FIND_CACHE) $$(shell $(FIND) $$(FIND_CACHE_NEW_DIRS) \( -type f -o -type l \) $2))
    endif
  endef

  # 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.
  #
  # $1 can be either a directory or a file. If it's a directory, make
  # sure we have exactly one trailing slash before the wildcard.
  # The extra - is needed when FIND_CACHE_DIRS is empty but should be harmless.
  #
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define CacheFind
    $(if $(filter-out $(addsuffix /%,- $(FIND_CACHE_DIRS)) $(FIND_CACHE_DIRS),$1), \
    $(shell $(FIND) $1 \( -type f -o -type l \) $2), \
    $(filter $(addsuffix /%,$(patsubst %/,%,$1)) $1,$(FIND_CACHE)))
  endef

else
  # If CacheFind is disabled, just run the find command.
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define CacheFind
    $(shell $(FIND) $1 \( -type f -o -type l \) $2)
  endef
endif

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

define AddFileToCopy
  # Helper macro for SetupCopyFiles
  # 1 : Source file
  # 2 : Dest file
  # 3 : Variable to add targets to
  # 4 : Macro to call for copy operation
  $2: $1
	$(ECHO) $(LOG_INFO) Copying $$(patsubst $(OUTPUT_ROOT)/%,%,$$@)
	$$($$(strip $4))

  $3 += $2
endef

# Setup make rules for copying files, with an option to do more complex
# processing instead of copying.
#
# Parameter 1 is the name of the rule. This name is used as variable prefix,
# and the targets generated are listed in a variable by that name.
#
# Remaining parameters are named arguments. These include:
#   SRC     : Source root dir (defaults to dir of first file)
#   DEST    : Dest root dir
#   FILES   : List of files to copy with absolute paths, or path relative to SRC.
#             Must be in SRC.
#   FLATTEN : Set to flatten the directory structure in the DEST dir.
#   MACRO   : Optionally override the default macro used for making the copy.
#             Default is 'install-file'
SetupCopyFiles = $(NamedParamsMacroTemplate)
define SetupCopyFilesBody

  ifeq ($$($1_MACRO), )
    $1_MACRO := install-file
  endif

  # Default SRC to the dir of the first file.
  ifeq ($$($1_SRC), )
    $1_SRC := $$(dir $$(firstword $$($1_FILES)))
  endif

  # Remove any trailing slash from SRC
  $1_SRC := $$(patsubst %/,%,$$($1_SRC))

  $$(foreach f, $$(patsubst $$($1_SRC)/%,%,$$($1_FILES)), \
      $$(eval $$(call AddFileToCopy, $$($1_SRC)/$$f, \
      $$($1_DEST)/$$(if $$($1_FLATTEN),$$(notdir $$f),$$f), $1, $$($1_MACRO))))

endef

################################################################################
# ShellQuote
#
# Quotes a string with single quotes and replaces single quotes with '\'' so
# that the contents survives being given to the shell.

ShellQuote = \
    $(SQUOTE)$(subst $(SQUOTE),$(SQUOTE)\$(SQUOTE)$(SQUOTE),$(strip $1))$(SQUOTE)

################################################################################
# Write to and read from file

# Param 1 - File to read
ReadFile = \
    $(shell $(CAT) $1)

# Param 1 - Text to write
# Param 2 - File to write to
# Use printf to get consistent behavior on all platforms.
WriteFile = \
    $(shell $(PRINTF) "%s" $(call ShellQuote, $1) > $2)

################################################################################
# DependOnVariable
#
# This macro takes a variable name and puts the value in a file only if the
# value has changed since last. The name of the file is returned. This can be
# used to create rule dependencies on make variable values. The following
# example would get rebuilt if the value of SOME_VAR was changed:
#
# path/to/some-file: $(call DependOnVariable, SOME_VAR)
#         echo $(SOME_VAR) > $@
#
# Note that leading and trailing white space in the value is ignored.
#

# Defines the sub directory structure to store variable value file in
DependOnVariableDirName = \
    $(strip $(subst $(SRC_ROOT)/,,\
        $(if $(filter /%, $(firstword $(MAKEFILE_LIST))), \
          $(firstword $(MAKEFILE_LIST)), \
          $(CURDIR)/$(firstword $(MAKEFILE_LIST)))))

# Defines the name of the file to store variable value in. Generates a name
# unless parameter 2 is given.
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariableFileName = \
    $(strip $(if $(strip $2), $2, \
      $(MAKESUPPORT_OUTPUTDIR)/vardeps/$(DependOnVariableDirName)/$(strip $1).vardeps))

# Does the actual work with parameters stripped.
# If the file exists AND the contents is the same as the variable, do nothing
# else print a new file.
# Always returns the name of the file where the value was printed.
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariableHelper = \
    $(strip $(if $(and $(wildcard $(call DependOnVariableFileName, $1, $2)),\
        $(call equals, $(strip $($1)), \
            $(call ReadFile, $(call DependOnVariableFileName, $1, $2)))),,\
      $(call MakeDir, $(dir $(call DependOnVariableFileName, $1, $2))) \
      $(if $(findstring $(LOG_LEVEL), trace), \
          $(info Variable $1: >$(strip $($1))<) \
          $(info File: >$(call ReadFile, $(call DependOnVariableFileName, $1, $2))<)) \
      $(call WriteFile, $($1), $(call DependOnVariableFileName, $1, $2))) \
    $(call DependOnVariableFileName, $1, $2))

# Main macro
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariable = \
    $(call DependOnVariableHelper,$(strip $1),$(strip $2))

################################################################################
# Failure logging support macros. These are supposed to be used by the Setup*
# compilation macros.
#
# LogFailures will run a command and store a copy of output in a specified file.
# If the command succeeds, the file is deleted, otherwise it is moved to the
# failure-logs directory.
# Param 1 - The log file of the failed command
# Param 2 - A compact but representative name to describe this command
# Param 3 - Command to run
LogFailures = \
  ( ($(BASH) $(SRC_ROOT)/common/bin/logger.sh $1 $3 && $(RM) $1) || \
  (exitcode=$(DOLLAR)$(DOLLAR)? && $(MV) $1 $(MAKESUPPORT_OUTPUTDIR)/failure-logs/$(strip $2).log && exit $(DOLLAR)$(DOLLAR)exitcode) )

################################################################################
# Find lib dir for module
# Param 1 - module name
ifeq ($(OPENJDK_TARGET_OS_TYPE), unix)
  FindLibDirForModule = \
      $(SUPPORT_OUTPUTDIR)/modules_libs/$(strip $1)$(OPENJDK_TARGET_CPU_LIBDIR)
else
  FindLibDirForModule = \
      $(SUPPORT_OUTPUTDIR)/modules_libs/$(strip $1)
endif

################################################################################
# Return a string suitable for use after a -classpath option. It will correct and safe to use
# on all platforms. Arguments are given as space separate classpath entries.
# param 1 : A space separated list of classpath entries
# The surrounding strip is needed to keep additional whitespace out
PathList = \
  "$(subst $(SPACE),$(PATH_SEP),$(strip $1))"

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

# Hook to include the corresponding custom file, if present.
$(eval $(call IncludeCustomExtension, , common/MakeBase.gmk))

endif # _MAKEBASE_GMK