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#!/usr/bin/gawk -f
# -*- tab-width: 4; indent-tabs-mode: t -*-
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# Create dependency information from the output of cl.exe's showInclude. It
# needs additional information - the output name to which to write, objfile
# that depends on the includes, and the original file name.
# For best results all arguments should be absolute paths.
#
# It also consolidates the file names to a canonical form, and filters out
# duplicates.
#
# based on filter-showInclude.pl by Jan Holesovsky <kendy@suse.cz>
BEGIN {
if (!depfile || !objectfile || !sourcefile) {
print "usage: filter-showIncludes.awk -vdepfile=depfile.d " \
"-vobjectfile=objfile.o -vsourcefile=source.cxx" > "/dev/stderr"
exit 1
}
tempfile = depfile ".tmp"
print objectfile " : \\\n " sourcefile " \\" > tempfile
showincludes_prefix = ENVIRON["SHOWINCLUDES_PREFIX"];
if (!showincludes_prefix) {
showincludes_prefix = "Note: including file:"
}
# to match especially drive letters in whitelist case insensitive
IGNORECASE = 1
whitelist = \
"^(" ENVIRON["SRCDIR"] "|" ENVIRON["WORKDIR"] ")"
firstline = 1
}
{
sub(/\r$/, "")
sub(/^ */, "")
if (index($0, showincludes_prefix) == 1) {
$0 = substr($0, length(showincludes_prefix) + 1)
sub(/^ */, "")
# The output from MSVC may contain a carriage return character at the
# end of filenames, in which case the translation unit will depend on a
# non-existing header, resulting in constant rebuild of all files,
# prevent that.
sub(/
/, "")
gsub(/\\/, "/")
gsub(/ /, "\\ ")
if ($0 ~ whitelist) { # filter out system headers
if (!($0 in incfiles)) {
incfiles[$0]
print " " $0 " \\" > tempfile
}
}
} else {
# because MSVC stupidly prints errors on stdout, it's
# necessary to forward everything that isn't matched by the pattern
# so users get to see them.
if (firstline) { # ignore the line that just prints name of sourcefile
firstline = 0
} else {
print $0 > "/dev/stderr"
}
}
}
END {
if (!tempfile) {
exit 1
}
print "" > tempfile
# fdo#40099 if header.h does not exist, it will simply be considered out of
# date and any targets that use it as a prerequisite will be updated,
# which avoid misery when the header is deliberately deleted and removed
# as an include
# see http://www.makelinux.net/make3/make3-CHP-8-SECT-3
for (file in incfiles) {
print file " :\n" > tempfile
}
close(tempfile)
movecmd = "mv " tempfile " " depfile
ret = system(movecmd)
if (ret) {
print "ERROR: " movecmd " FAILED with status " ret > "/dev/stderr"
exit ret
}
}
# vim: set noet sw=4 ts=4:
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