make/CompileCommands.gmk

#
# Copyright (c) 2018, 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.
#

default: all

include $(SPEC)
include MakeBase.gmk

# When FIXPATH is set, let it process the file to make sure all paths are usable
# by system native tools. The FIXPATH tool assumes arguments preceeded by an @
# character points to a text file containing further arguments (similar to a
# linker). It replaces any such arguments with a different temporary filename,
# whose contents has been processed to make any paths native. To obtain a
# properly processed compile_commands.json, FIXPATH is then made to invoke an
# AWK script with the unprocessed json file as the only argument, prepended with
# an @ character. The AWK script simply copies the contents of this processed
# file.
#
# The sed command encloses the fragments inside brackets and removes the final
# trailing comma.
$(OUTPUTDIR)/compile_commands.json: $(wildcard $(MAKESUPPORT_OUTPUTDIR)/compile-commands/*.json)
	$(call LogWarn, Updating compile_commands.json)
	$(RM) $@
	$(FIND) $(MAKESUPPORT_OUTPUTDIR)/compile-commands/ -name \*.json | \
	    $(SORT) | $(XARGS) $(CAT) >> $@.tmp
	$(if $(FIXPATH),$(FIXPATH) $(AWK) 'BEGIN { \
	    tmpfile = substr(ARGV[2],2); \
	    cmd = "$(CP) " "\047" tmpfile "\047" " $@.tmp"; \
	    system(cmd); \
	}' -- @$@.tmp)
	$(SED) -e '1s/^/[\$(NEWLINE)/' -e '$(DOLLAR)s/,\s\{0,\}$(DOLLAR)/\$(NEWLINE)]/' $@.tmp > $@
	$(RM) $@.tmp

TARGETS += $(OUTPUTDIR)/compile_commands.json

all: $(TARGETS)

.PHONY: all