contrib/gcc_update

   1 #! /bin/sh
   2 #
   3 # Update a local CVS tree from the GCC repository, with an emphasis
   4 # on treating generated files correctly, so that autoconf, gperf et
   5 # al are not required for the ``end'' user.
   6 #
   7 # By default all command-line options are passed to `cvs update` in
   8 # addition to $UPDATE_OPTIONS (defined below). If the first parameter
   9 # reads --nostdflags, $UPDATE_OPTIONS as well as this parameter itself
  10 # are omitted.
  11 #
  12 # If the first parameter reads --patch, the second parameter is considered
  13 # a patch file.
  14 #
  15 # If the first parameter is --touch, no cvs operation will be performed,
  16 # only generated files that appear to be out of date in the local tree
  17 # will be touched.
  18 #
  19 # If the first parameter is --list, a list of the generated files and
  20 # their dependencies will be printed; --help prints this message.
  21 #
  22 # Examples:
  23 #
  24 # contrib/gcc_update -r gcc_latest_snapshot
  25 # contrib/gcc_update -A
  26 # contrib/gcc_update --nostdflags -P -r gcc-2_95-branch gcc/testsuite
  27 # contrib/gcc_update --patch some-patch
  28 # contrib/gcc_update --touch
  29 # contrib/gcc_update --list
  30 #
  31 #
  32 # (C) 1998-2000 Free Software Foundation
  33 # Originally by Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>, August 1998.
  34 #
  35 # This script is Free Software, and it can be copied, distributed and
  36 # modified as defined in the GNU General Public License.  A copy of
  37 # its license can be downloaded from http://www.gnu.org/copyleft/gpl.html
  38
  39
  40 # Default options used when updating via CVS.
  41 UPDATE_OPTIONS=-P
  42 # Add -d to create any directories that exist in the repository but not
  43 #        locally.
  44 # Add -A to reset any sticky tags, dates, or `-k' options.
  45
  46 # Arrange for the value of $0 to be available for functions
  47 self=$0
  48
  49 # This function prints a list of all generated files, along with their
  50 # dependencies.  Note that only one target is supported per line: the
  51 # colon is stripped from the output.
  52 files_and_dependencies () {
  53     sed -e 's/ *#.*//' -e '/^$/d' -e 's/://' <<\EOF
  54 # All automake dependencies within texinfo
  55 # In fact, not all, since we do not care about sub-directories that
  56 # we do not build.  In particular, *.po and *.gmo are not touched.
  57 texinfo/aclocal.m4: texinfo/configure.in texinfo/acinclude.m4
  58 texinfo/Makefile.in: texinfo/Makefile.am texinfo/configure.in texinfo/aclocal.m4
  59 texinfo/configure: texinfo/configure.in texinfo/aclocal.m4
  60 texinfo/stamp-h.in: texinfo/configure.in texinfo/aclocal.m4 texinfo/acconfig.h
  61 texinfo/lib/Makefile.in: texinfo/lib/Makefile.am texinfo/configure.in texinfo/aclocal.m4
  62 texinfo/makeinfo/Makefile.in: texinfo/makeinfo/Makefile.am texinfo/configure.in texinfo/aclocal.m4
  63 texinfo/util/Makefile.in: texinfo/util/Makefile.am texinfo/configure.in texinfo/aclocal.m4
  64 # Now, proceed to gcc automatically generated files
  65 gcc/configure: gcc/configure.in
  66 gcc/cstamp-h.in: gcc/configure.in gcc/acconfig.h
  67 gcc/config.in: gcc/cstamp-h.in
  68 gcc/fixinc/fixincl.x: gcc/fixinc/fixincl.tpl gcc/fixinc/inclhack.def
  69 gcc/tradcif.c: gcc/tradcif.y
  70 gcc/gcov.1: gcc/gcov.texi
  71 # And then, language-specific files
  72 gcc/java/parse.h: gcc/java/parse.y
  73 # And libraries, at last
  74 libchill/configure: libchill/configure.in
  75 libf2c/configure: libf2c/configure.in
  76 libf2c/libF77/configure: libf2c/libF77/configure.in
  77 libf2c/libI77/configure: libf2c/libI77/configure.in
  78 libf2c/libU77/configure: libf2c/libU77/configure.in
  79 libf2c/libU77/stamp-h.in: libf2c/libU77/configure.in libf2c/libU77/acconfig.h
  80 libobjc/configure: libobjc/configure.in
  81 EOF
  82 }
  83
  84
  85 # This function checks whether its first argument is newer than all
  86 # the other arguments.  It returns success (0) otherwise.
  87 is_out_of_date () {
  88   test `ls -1dt ${1+"$@"} | sed 1q` != "$1"
  89 }
  90
  91
  92 # This function touches generated files such that the ``end'' user does
  93 # not have to rebuild them.
  94 touch_files () {
  95     files_and_dependencies | while read f deps; do
  96         if test -f $f && is_out_of_date "$f" $deps; then
  97             echo Touching "$f"...
  98             touch $f
  99             if is_out_of_date "$f" $deps; then
 100                 # Hmm, it may have got the same timestamp as one of
 101                 # its touched dependencies.  Wait a second and retry.
 102                 sleep 1
 103                 echo Touching "$f" once more...
 104                 touch $f
 105             fi
 106         fi
 107     done
 108 }
 109
 110 # Whenever we update the tree or install a patch, we may be modifying
 111 # this script.  By re-execing it, we ensure that the appropriate
 112 # dependencies and rules will be used.
 113 touch_files_reexec () {
 114     echo "Adjusting file timestamps"
 115     exec ${CONFIG_SHELL-/bin/sh} $self --touch
 116 }
 117
 118 # This functions applies a patch to an existing tree.
 119 apply_patch () {
 120     if [ -f $1 ]; then
 121         echo "Applying patch file $1"
 122         case "$1" in
 123         *gz)
 124             gzip -d -c $1 | patch -p1 ;;
 125         *bz2)
 126             bzip2 -d -c $1 | patch -p1 ;;
 127         *)
 128             cat $1 | patch -p1 ;;
 129         esac
 130     fi
 131     touch_files_reexec
 132 }
 133
 134 # Check whether this indeed looks like a local tree.
 135 if [ ! -f gcc/version.c ]; then
 136     echo "This does not seem to be a GCC tree!"
 137     exit
 138 fi
 139
 140 case "$1" in
 141 # First of all, check whether we are going to process a patch.
 142 --patch)
 143     if test "$#" != 2; then
 144         echo "$1" expects only one argument >&2
 145         exit 1
 146     fi
 147     apply_patch "${2}"
 148     exit $?
 149     ;;
 150
 151 --touch)
 152     if test "$#" != 1; then
 153         echo "$1" does not expect any argument >&2
 154         exit 1
 155     fi
 156     touch_files
 157     exit $?
 158     ;;
 159
 160 --list)
 161     if test "$#" != 1; then
 162         echo "$1" does not expect any argument >&2
 163         exit 1
 164     fi
 165     files_and_dependencies | sed 's/ /: /'
 166     exit $?
 167     ;;
 168
 169 --help)
 170     sed -e '1,2d' -e '/^UPDATE_OPTIONS=/{i\
 171 \
 172
 173 p
 174 }' \
 175         -e '/^$/,$d' -e 's/#//' -e 's/^ //' < $0
 176     exit $?
 177     ;;
 178
 179 esac
 180
 181 # Check whether this indeed looks like a local CVS tree.
 182 if [ ! -d CVS ]; then
 183     echo "This does not seem to be a GCC CVS tree!"
 184     exit
 185 fi
 186
 187 # Check command-line options
 188 if [ x"${1}"x = x"--nostdflags"x ]; then
 189     shift
 190 else
 191     set -- $UPDATE_OPTIONS ${1+"$@"}
 192 fi
 193
 194 echo "Updating CVS tree"
 195 cvs -q update ${1+"$@"}
 196 if [ $? -ne 0 ]; then
 197     (touch_files_reexec)
 198     echo "CVS update of full tree failed." >&2
 199     exit 1
 200 fi
 201
 202 touch_files_reexec