#

# Copyright (c) 2011, 2017, 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.

#

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

# This file contains helper functions for Init.gmk.

# It is divided in two parts, depending on if a SPEC is present or not

# (HAS_SPEC is true or not).

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

ifndef _INITSUPPORT_GMK

_INITSUPPORT_GMK := 1

ifeq ($(HAS_SPEC),)

  # Include the corresponding closed file, if present.

  ifneq ($(CUSTOM_MAKE_DIR), )

    -include $(CUSTOM_MAKE_DIR)/InitSupport.gmk

  endif

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

  # Helper functions for the initial part of Init.gmk, before the spec file is

  # loaded. Most of these functions provide parsing and setting up make options

  # from the command-line.

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

  # Make control variables, handled by Init.gmk

  INIT_CONTROL_VARIABLES += LOG CONF CONF_NAME SPEC JOBS TEST_JOBS CONF_CHECK \

      COMPARE_BUILD JTREG GTEST

  # All known make control variables

  MAKE_CONTROL_VARIABLES := $(INIT_CONTROL_VARIABLES) TEST JDK_FILTER

  # Define a simple reverse function.

  # Should maybe move to MakeBase.gmk, but we can't include that file now.

  reverse = \

      $(if $(strip $(1)), $(call reverse, $(wordlist 2, $(words $(1)), $(1)))) \

          $(firstword $(1))

  # The variable MAKEOVERRIDES contains variable assignments from the command

  # line, but in reverse order to what the user entered.

  # The '\#' <=> '\ 'dance is needed to keep values with space in them connected.

  COMMAND_LINE_VARIABLES := $(subst \#,\ , $(call reverse, $(subst \ ,\#,$(MAKEOVERRIDES))))

  # A list like FOO="val1" BAR="val2" containing all user-supplied make

  # variables that we should propagate.

  # The '\#' <=> '\ 'dance is needed to keep values with space in them connected.

  USER_MAKE_VARS := $(subst \#,\ , $(filter-out $(addsuffix =%, $(INIT_CONTROL_VARIABLES)), \

      $(subst \ ,\#,$(MAKEOVERRIDES))))

  # Setup information about available configurations, if any.

  ifneq ($(CUSTOM_ROOT), )

    build_dir=$(CUSTOM_ROOT)/build

  else

    build_dir=$(topdir)/build

  endif

  all_spec_files=$(wildcard $(build_dir)/*/spec.gmk)

  # Extract the configuration names from the path

  all_confs=$(patsubst %/spec.gmk, %, $(patsubst $(build_dir)/%, %, $(all_spec_files)))

  # Check for unknown command-line variables

  define CheckControlVariables

    command_line_variables := $$(strip $$(foreach var, \

        $$(subst \ ,_,$$(MAKEOVERRIDES)), \

        $$(firstword $$(subst =, , $$(var)))))

    unknown_command_line_variables := $$(strip \

        $$(filter-out $$(MAKE_CONTROL_VARIABLES), $$(command_line_variables)))

    ifneq ($$(unknown_command_line_variables), )

      $$(info Note: Command line contains non-control variables:)

      $$(foreach var, $$(unknown_command_line_variables), $$(info * $$(var)=$$($$(var))))

      $$(info Make sure it is not mistyped, and that you intend to override this variable.)

      $$(info 'make help' will list known control variables.)

      $$(info )

    endif

  endef

  # Check for deprecated ALT_ variables

  define CheckDeprecatedEnvironment

    defined_alt_variables := $$(filter ALT_%, $$(.VARIABLES))

    ifneq ($$(defined_alt_variables), )

      $$(info Warning: You have the following ALT_ variables set:)

      $$(foreach var, $$(defined_alt_variables), $$(info * $$(var)=$$($$(var))))

      $$(info ALT_ variables are deprecated, and may result in a failed build.)

      $$(info Please clean your environment.)

      $$(info )

    endif

  endef

  # Check for invalid make flags like -j

  define CheckInvalidMakeFlags

    # This is a trick to get this rule to execute before any other rules

    # MAKEFLAGS only indicate -j if read in a recipe (!)

    $$(topdir)/make/Init.gmk: .FORCE

	$$(if $$(findstring --jobserver, $$(MAKEFLAGS)), \

	    $$(info Error: 'make -jN' is not supported, use 'make JOBS=N') \

	    $$(error Cannot continue) \

	)

    .FORCE:

    .PHONY: .FORCE

  endef

  # Check that the CONF_CHECK option is valid and set up handling

  define ParseConfCheckOption

    ifeq ($$(CONF_CHECK), )

      # Default behavior is fail

      CONF_CHECK := fail

    else ifneq ($$(filter-out auto fail ignore, $$(CONF_CHECK)),)

      $$(info Error: CONF_CHECK must be one of: auto, fail or ignore.)

      $$(error Cannot continue)

    endif

  endef

  # Look for a given option in the LOG variable, and if found, set a variable

  # and remove the option from the LOG variable

  # $1: The option to look for

  # $2: The option to set to "true" if the option is found

  define ParseLogOption

    ifneq ($$(findstring $1, $$(LOG)),)

      $2 := true

      # COMMA is defined in spec.gmk, but that is not included yet

      COMMA := ,

      # First try to remove ",<option>" if it exists, otherwise just remove "<option>"

      LOG_STRIPPED := $$(subst $1,, $$(subst $$(COMMA)$(strip $1),, $$(LOG)))

      # We might have ended up with a leading comma. Remove it. Need override

      # since LOG is set from the command line.

      override LOG := $$(strip $$(patsubst $$(COMMA)%, %, $$(LOG_STRIPPED)))

    endif

  endef

  define ParseLogLevel

    # Catch old-style VERBOSE= command lines.

    ifneq ($$(origin VERBOSE), undefined)

      $$(info Error: VERBOSE is deprecated. Use LOG=<warn|info|debug|trace> instead.)

      $$(error Cannot continue)

    endif

    # Setup logging according to LOG

    # If the "nofile" argument is given, act on it and strip it away

    $$(eval $$(call ParseLogOption, nofile, LOG_NOFILE))

    # If the "cmdline" argument is given, act on it and strip it away

    $$(eval $$(call ParseLogOption, cmdlines, LOG_CMDLINES))

    # If the "profile-to-log" argument is given, write shell times in build log

    $$(eval $$(call ParseLogOption, profile-to-log, LOG_PROFILE_TIMES_LOG))

    # If the "profile" argument is given, write shell times in separate log file

    # IMPORTANT: $(ParseLogOption profile-to-log) should go first. Otherwise

    # parsing of 'LOG=debug,profile-to-log,nofile' ends up in the following error:

    # Error: LOG contains unknown option or log level: debug-to-log.

    $$(eval $$(call ParseLogOption, profile, LOG_PROFILE_TIMES_FILE))

    # Treat LOG=profile-to-log as if it were LOG=profile,profile-to-log

    LOG_PROFILE_TIMES_FILE := $$(firstword $$(LOG_PROFILE_TIMES_FILE) $$(LOG_PROFILE_TIMES_LOG))

    LOG_LEVEL := $$(LOG)

    ifeq ($$(LOG_LEVEL),)

      # Set LOG to "warn" as default if not set

      LOG_LEVEL := warn

    endif

    ifeq ($$(LOG_LEVEL), warn)

      MAKE_LOG_FLAGS := -s

    else ifeq ($$(LOG_LEVEL), info)

      MAKE_LOG_FLAGS := -s

    else ifeq ($$(LOG_LEVEL), debug)

      MAKE_LOG_FLAGS :=

    else ifeq ($$(LOG_LEVEL), trace)

      MAKE_LOG_FLAGS :=

    else

      $$(info Error: LOG contains unknown option or log level: $$(LOG).)

      $$(info LOG can be <level>[,<opt>[...]] where <opt> is nofile | cmdlines | profile | profile-to-log)

      $$(info and <level> is warn | info | debug | trace)

      $$(error Cannot continue)

    endif

  endef

  define ParseConfAndSpec

    ifneq ($$(origin SPEC), undefined)

      # We have been given a SPEC, check that it works out properly

      ifneq ($$(origin CONF), undefined)

        # We also have a CONF argument. We can't have both.

        $$(info Error: Cannot use CONF=$$(CONF) and SPEC=$$(SPEC) at the same time. Choose one.)

        $$(error Cannot continue)

      endif

      ifneq ($$(origin CONF_NAME), undefined)

        # We also have a CONF_NAME argument. We can't have both.

        $$(info Error: Cannot use CONF_NAME=$$(CONF_NAME) and SPEC=$$(SPEC) at the same time. Choose one.)

        $$(error Cannot continue)

      endif

      ifeq ($$(wildcard $$(SPEC)),)

        $$(info Error: Cannot locate spec.gmk, given by SPEC=$$(SPEC).)

        $$(error Cannot continue)

      endif

      ifeq ($$(filter /%, $$(SPEC)),)

        # If given with relative path, make it absolute

        SPECS := $$(CURDIR)/$$(strip $$(SPEC))

      else

        SPECS := $$(SPEC)

      endif

      # For now, unset this SPEC variable.

      override SPEC :=

    else

      # Use spec.gmk files in the build output directory

      ifeq ($$(all_spec_files),)

        ifneq ($(CUSTOM_ROOT), )

          $$(info Error: No configurations found for $$(CUSTOM_ROOT).)

        else

          $$(info Error: No configurations found for $$(topdir).)

        endif

        $$(info Please run 'bash configure' to create a configuration.)

        $$(info )

        $$(error Cannot continue)

      endif

      ifneq ($$(origin CONF_NAME), undefined)

        ifneq ($$(origin CONF), undefined)

          # We also have a CONF argument. We can't have both.

          $$(info Error: Cannot use CONF=$$(CONF) and CONF_NAME=$$(CONF_NAME) at the same time. Choose one.)

          $$(error Cannot continue)

        endif

        matching_conf := $$(strip $$(filter $$(CONF_NAME), $$(all_confs)))

        ifeq ($$(matching_conf),)

          $$(info Error: No configurations found matching CONF_NAME=$$(CONF_NAME).)

          $$(info Available configurations in $$(build_dir):)

          $$(foreach var, $$(all_confs), $$(info * $$(var)))

          $$(error Cannot continue)

        else ifneq ($$(words $$(matching_conf)), 1)

          $$(info Error: Matching more than one configuration CONF_NAME=$$(CONF_NAME).)

          $$(info Available configurations in $$(build_dir):)

          $$(foreach var, $$(all_confs), $$(info * $$(var)))

          $$(error Cannot continue)

        else

          $$(info Building configuration '$$(matching_conf)' (matching CONF_NAME=$$(CONF_NAME)))

        endif

        # Create a SPEC definition. This will contain the path to exactly one spec file.

        SPECS := $$(build_dir)/$$(matching_conf)/spec.gmk

      else ifneq ($$(origin CONF), undefined)

        # User have given a CONF= argument.

        ifeq ($$(CONF),)

          # If given CONF=, match all configurations

          matching_confs := $$(strip $$(all_confs))

        else

          # Otherwise select those that contain the given CONF string

          matching_confs := $$(strip $$(foreach var, $$(all_confs), \

              $$(if $$(findstring $$(CONF), $$(var)), $$(var))))

        endif

        ifeq ($$(matching_confs),)

          $$(info Error: No configurations found matching CONF=$$(CONF).)

          $$(info Available configurations in $$(build_dir):)

          $$(foreach var, $$(all_confs), $$(info * $$(var)))

          $$(error Cannot continue)

        else

          # Don't repeat this output on make restarts caused by including

          # generated files.

          ifeq ($$(MAKE_RESTARTS),)

            ifeq ($$(words $$(matching_confs)), 1)

              $$(info Building configuration '$$(matching_confs)' (matching CONF=$$(CONF)))

            else

              $$(info Building these configurations (matching CONF=$$(CONF)):)

              $$(foreach var, $$(matching_confs), $$(info * $$(var)))

            endif

          endif

        endif

        # Create a SPEC definition. This will contain the path to one or more spec.gmk files.

        SPECS := $$(addsuffix /spec.gmk, $$(addprefix $$(build_dir)/, $$(matching_confs)))

      else

        # No CONF or SPEC given, check the available configurations

        ifneq ($$(words $$(all_spec_files)), 1)

          $$(info Error: No CONF given, but more than one configuration found.)

          $$(info Available configurations in $$(build_dir):)

          $$(foreach var, $$(all_confs), $$(info * $$(var)))

          $$(info Please retry building with CONF=<config pattern> (or SPEC=<spec file>).)

          $$(info )

          $$(error Cannot continue)

        endif

        # We found exactly one configuration, use it

        SPECS := $$(strip $$(all_spec_files))

      endif

    endif

  endef

  # Extract main targets from Main.gmk using the spec provided in $2.

  #

  # Param 1: FORCE = force generation of main-targets.gmk or LAZY = do not force.

  # Param 2: The SPEC file to use.

  define DefineMainTargets

    # We will start by making sure the main-targets.gmk file is removed, if

    # make has not been restarted. By the -include, we will trigger the

    # rule for generating the file (which is never there since we removed it),

    # thus generating it fresh, and make will restart, incrementing the restart

    # count.

    main_targets_file := $$(dir $(strip $2))make-support/main-targets.gmk

    ifeq ($$(MAKE_RESTARTS),)

      # Only do this if make has not been restarted, and if we do not force it.

      ifeq ($(strip $1), FORCE)

        $$(shell rm -f $$(main_targets_file))

      endif

    endif

    $$(main_targets_file):

	@( cd $$(topdir) && \

	$$(MAKE) $$(MAKE_LOG_FLAGS) -r -R -f $$(topdir)/make/Main.gmk \

	    -I $$(topdir)/make/common SPEC=$(strip $2) NO_RECIPES=true \

	    $$(MAKE_LOG_VARS) \

	    create-main-targets-include )

    # Now include main-targets.gmk. This will define ALL_MAIN_TARGETS.

    -include $$(main_targets_file)

  endef

  define PrintConfCheckFailed

	@echo ' '

	@echo "Please rerun configure! Easiest way to do this is by running"

	@echo "'make reconfigure'."

	@echo "This behavior may also be changed using CONF_CHECK=<ignore|auto>."

	@echo ' '

  endef

else # $(HAS_SPEC)=true

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

  # Helper functions for the 'main' target. These functions assume a single,

  # proper and existing SPEC is included.

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

  include $(TOPDIR)/make/common/MakeBase.gmk

  # Define basic logging setup

  BUILD_LOG := $(OUTPUTDIR)/build.log

  BUILD_PROFILE_LOG := $(OUTPUTDIR)/build-profile.log

  BUILD_LOG_PIPE := > >($(TEE) -a $(BUILD_LOG)) 2> >($(TEE) -a $(BUILD_LOG) >&2) && wait

  # Sanity check the spec file, so it matches this source code

  define CheckSpecSanity

    ifneq ($$(ACTUAL_TOPDIR), $$(TOPDIR))

      ifneq ($$(ACTUAL_TOPDIR), $$(ORIGINAL_TOPDIR))

        ifneq ($$(ACTUAL_TOPDIR), $$(CANONICAL_TOPDIR))

          $$(info Error: SPEC mismatch! Current working directory)

          $$(info $$(ACTUAL_TOPDIR))

          $$(info does not match either TOPDIR, ORIGINAL_TOPDIR or CANONICAL_TOPDIR)

          $$(info $$(TOPDIR))

          $$(info $$(ORIGINAL_TOPDIR))

          $$(info $$(CANONICAL_TOPDIR))

          $$(error Cannot continue)

        endif

      endif

    endif

  endef

  # Parse COMPARE_BUILD into COMPARE_BUILD_*

  # Syntax: COMPARE_BUILD=CONF=<configure options>:PATCH=<patch file>:

  #         MAKE=<make targets>:COMP_OPTS=<compare script options>:

  #         COMP_DIR=<compare script base dir>|<default>:

  #         FAIL=<bool>

  # If neither CONF or PATCH is given, assume <default> means CONF if it

  # begins with "--", otherwise assume it means PATCH.

  # MAKE and COMP_OPTS can only be used with CONF and/or PATCH specified.

  # If any value contains "+", it will be replaced by space.

  # FAIL can be set to false to have the return value of compare be ignored.

  define ParseCompareBuild

    ifneq ($$(COMPARE_BUILD), )

      COMPARE_BUILD_OUTPUTDIR := $(TOPDIR)/build/compare-build/$(CONF_NAME)

      COMPARE_BUILD_FAIL := true

      ifneq ($$(findstring :, $$(COMPARE_BUILD)), )

        $$(foreach part, $$(subst :, , $$(COMPARE_BUILD)), \

          $$(if $$(filter PATCH=%, $$(part)), \

            $$(eval COMPARE_BUILD_PATCH=$$(strip $$(patsubst PATCH=%, %, $$(part)))) \

          ) \

          $$(if $$(filter CONF=%, $$(part)), \

            $$(eval COMPARE_BUILD_CONF=$$(strip $$(subst +, , $$(patsubst CONF=%, %, $$(part))))) \

          ) \

          $$(if $$(filter MAKE=%, $$(part)), \

            $$(eval COMPARE_BUILD_MAKE=$$(strip $$(subst +, , $$(patsubst MAKE=%, %, $$(part))))) \

          ) \

          $$(if $$(filter COMP_OPTS=%, $$(part)), \

            $$(eval COMPARE_BUILD_COMP_OPTS=$$(strip $$(subst +, , $$(patsubst COMP_OPTS=%, %, $$(part))))) \

          ) \

          $$(if $$(filter COMP_DIR=%, $$(part)), \

            $$(eval COMPARE_BUILD_COMP_DIR=$$(strip $$(subst +, , $$(patsubst COMP_DIR=%, %, $$(part))))) \

          ) \

          $$(if $$(filter FAIL=%, $$(part)), \

            $$(eval COMPARE_BUILD_FAIL=$$(strip $$(subst +, , $$(patsubst FAIL=%, %, $$(part))))) \

          ) \

        )

      else

        # Separate handling for single field case, to allow for spaces in values.

        ifneq ($$(filter PATCH=%, $$(COMPARE_BUILD)), )

          COMPARE_BUILD_PATCH=$$(strip $$(patsubst PATCH=%, %, $$(COMPARE_BUILD)))

        else ifneq ($$(filter CONF=%, $$(COMPARE_BUILD)), )

          COMPARE_BUILD_CONF=$$(strip $$(subst +, , $$(patsubst CONF=%, %, $$(COMPARE_BUILD))))

        else ifneq ($$(filter --%, $$(COMPARE_BUILD)), )

          # Assume CONF if value begins with --

          COMPARE_BUILD_CONF=$$(strip $$(subst +, , $$(COMPARE_BUILD)))

        else

          # Otherwise assume patch file

          COMPARE_BUILD_PATCH=$$(strip $$(COMPARE_BUILD))

        endif

      endif

      ifneq ($$(COMPARE_BUILD_PATCH), )

        ifneq ($$(wildcard $$(TOPDIR)/$$(COMPARE_BUILD_PATCH)), )

          # Assume relative path, if file exists

          COMPARE_BUILD_PATCH := $$(wildcard $$(TOPDIR)/$$(COMPARE_BUILD_PATCH))

        else ifeq ($$(wildcard $$(COMPARE_BUILD_PATCH)), )

          $$(error Patch file $$(COMPARE_BUILD_PATCH) does not exist)

        endif

      endif

      ifneq ($$(COMPARE_BUILD_FAIL), true)

        COMPARE_BUILD_IGNORE_RESULT := || true

      endif

    endif

  endef

  # Prepare for a comparison rebuild

  define PrepareCompareBuild

	$(ECHO) "Preparing for comparison rebuild"

        # Apply patch, if any

	$(if $(COMPARE_BUILD_PATCH), $(PATCH) -p1 < $(COMPARE_BUILD_PATCH))

        # Move the first build away temporarily

	$(RM) -r $(TOPDIR)/build/.compare-build-temp

	$(MKDIR) -p $(TOPDIR)/build/.compare-build-temp

	$(MV) $(OUTPUTDIR) $(TOPDIR)/build/.compare-build-temp

        # Restore an old compare-build, or create a new compare-build directory.

	if test -d $(COMPARE_BUILD_OUTPUTDIR); then \

	  $(MV) $(COMPARE_BUILD_OUTPUTDIR) $(OUTPUTDIR); \

	else \

	  $(MKDIR) -p $(OUTPUTDIR); \

	fi

        # Re-run configure with the same arguments (and possibly some additional),

        # must be done after patching.

	( cd $(OUTPUTDIR) && PATH="$(ORIGINAL_PATH)" \

	    $(BASH) $(TOPDIR)/configure $(CONFIGURE_COMMAND_LINE) $(COMPARE_BUILD_CONF))

  endef

  # Cleanup after a compare build

  define CleanupCompareBuild

        # If running with a COMPARE_BUILD patch, reverse-apply it

	$(if $(COMPARE_BUILD_PATCH), $(PATCH) -R -p1 < $(COMPARE_BUILD_PATCH))

        # Move this build away and restore the original build

	$(MKDIR) -p $(TOPDIR)/build/compare-build

	$(MV) $(OUTPUTDIR) $(COMPARE_BUILD_OUTPUTDIR)

	$(MV) $(TOPDIR)/build/.compare-build-temp/$(CONF_NAME) $(OUTPUTDIR)

	$(RM) -r $(TOPDIR)/build/.compare-build-temp

  endef

  # Do the actual comparison of two builds

  define CompareBuildDoComparison

        # Compare first and second build. Ignore any error code from compare.sh.

	$(ECHO) "Comparing between comparison rebuild (this/new) and baseline (other/old)"

	$(if $(COMPARE_BUILD_COMP_DIR), \

	  +(cd $(COMPARE_BUILD_OUTPUTDIR) && ./compare.sh $(COMPARE_BUILD_COMP_OPTS) \

	      -2dirs $(COMPARE_BUILD_OUTPUTDIR)/$(COMPARE_BUILD_COMP_DIR) \

	      $(OUTPUTDIR)/$(COMPARE_BUILD_COMP_DIR) $(COMPARE_BUILD_IGNORE_RESULT)), \

	  +(cd $(COMPARE_BUILD_OUTPUTDIR) && ./compare.sh $(COMPARE_BUILD_COMP_OPTS) \

	      -o $(OUTPUTDIR) $(COMPARE_BUILD_IGNORE_RESULT)) \

	)

  endef