solenv/gbuild/platform/filter-showIncludes.awk

   1 #!/usr/bin/gawk -f
   2 # -*- tab-width: 4; indent-tabs-mode: t -*-
   3 #
   4 # This file is part of the LibreOffice project.
   5 #
   6 # This Source Code Form is subject to the terms of the Mozilla Public
   7 # License, v. 2.0. If a copy of the MPL was not distributed with this
   8 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   9 #
  10
  11 # Create dependency information from the output of cl.exe's showInclude.  It
  12 # needs additional information - the output name to which to write, objfile
  13 # that depends on the includes, and the original file name.
  14 # For best results all arguments should be absolute paths.
  15 #
  16 # It also consolidates the file names to a canonical form, and filters out
  17 # duplicates.
  18 #
  19 # based on filter-showInclude.pl by Jan Holesovsky <kendy@suse.cz>
  20
  21 BEGIN {
  22     if (!depfile || !objectfile || !sourcefile) {
  23         print "usage: filter-showIncludes.awk -vdepfile=depfile.d " \
  24           "-vobjectfile=objfile.o -vsourcefile=source.cxx" > "/dev/stderr"
  25         exit 1
  26     }
  27     tempfile = depfile ".tmp"
  28     print objectfile " : \\\n " sourcefile " \\" > tempfile
  29
  30     showincludes_prefix = ENVIRON["SHOWINCLUDES_PREFIX"];
  31     if (!showincludes_prefix) {
  32         showincludes_prefix = "Note: including file:"
  33     }
  34
  35     # to match especially drive letters in allowlist case insensitive
  36     IGNORECASE = 1
  37     allowlist = \
  38         "^(" ENVIRON["SRCDIR"] "|" ENVIRON["WORKDIR"] ")"
  39     firstline = 1
  40 }
  41
  42 {
  43     sub(/\r$/, "")
  44     sub(/^ */, "")
  45     if (index($0, showincludes_prefix) == 1) {
  46         $0 = substr($0, length(showincludes_prefix) + 1)
  47         sub(/^ */, "")
  48
  49         # The output from MSVC may contain a carriage return character at the
  50         # end of filenames, in which case the translation unit will depend on a
  51         # non-existing header, resulting in constant rebuild of all files,
  52         # prevent that.
  53         sub(/
/, "")
  54
  55         gsub(/\\/, "/")
  56         gsub(/ /, "\\ ")
  57         if ($0 ~ allowlist) { # filter out system headers
  58             if (!($0 in incfiles)) {
  59                 incfiles[$0]
  60                 print " " $0 " \\" > tempfile
  61             }
  62         }
  63     } else {
  64         # because MSVC stupidly prints errors on stdout, it's
  65         # necessary to forward everything that isn't matched by the pattern
  66         # so users get to see them.
  67         if (firstline) { # ignore the line that just prints name of sourcefile
  68             firstline = 0
  69         } else {
  70             print $0 > "/dev/stderr"
  71         }
  72     }
  73 }
  74
  75 END {
  76     if (!tempfile) {
  77         exit 1
  78     }
  79     print "" > tempfile
  80
  81     # fdo#40099 if header.h does not exist, it will simply be considered out of
  82     # date and any targets that use it as a prerequisite will be updated,
  83     # which avoid misery when the header is deliberately deleted and removed
  84     # as an include
  85     # see http://www.makelinux.net/make3/make3-CHP-8-SECT-3
  86     for (file in incfiles) {
  87         print file " :\n" > tempfile
  88     }
  89
  90     close(tempfile)
  91     movecmd = "mv " tempfile " " depfile
  92     ret = system(movecmd)
  93     if (ret) {
  94         print "ERROR: " movecmd " FAILED with status " ret > "/dev/stderr"
  95         exit ret
  96     }
  97 }
  98
  99 # vim: set noet sw=4 ts=4: