third_party/hunspell/update_google_patch.sh

   1 #!/bin/bash
   2
   3 # Copyright 2014 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # Creates an updated google.patch that reflects all checked-in changes in the
   8 # current branch. To do this, it
   9 # 1) Checks out the baseline from CVS into a separate /tmp directory.
  10 # 2) Applies all changes third_party/hunspell had since baseline to the CVS dir.
  11 #    2a) Applying google.patch at current branches upstream revision
  12 #    2b) Applying all changes made in the current branch since upstream
  13 # 3) Diffs the updated CVS dir against the checkout made in 1)
  14 #
  15 # No files in the current branch except google.patch will be modified, and
  16 # applying google.patch to the CVS baseline catches baseline up to
  17 # third_party/hunspell.
  18
  19 cvs_dir=""
  20 tempfiles=( )
  21 tmplate="/tmp/`basename $0`.XXXXXX"
  22
  23 # Cleanup function to be executed whenever the script exits.
  24 function cleanup() {
  25   if [[ $cvs_dir ]]; then
  26     rm -r "${cvs_dir}"
  27   fi
  28
  29   if [[ ${tempfiles[@]} ]]; then
  30     rm "${tempfiles[@]}"
  31   fi
  32   cd ${starting_dir}
  33 }
  34 trap cleanup 0
  35
  36 # Generate a temp file and register it for cleanup
  37 function tempfile() {
  38   local result=$1
  39   local tmpfile=$(mktemp ${tmplate}) || exit 1
  40   tempfiles+=( "${tmpfile}" )
  41   eval $result="'$tmpfile'"
  42 }
  43
  44 starting_dir=$(pwd)
  45 hunspell_dir=$(dirname $(readlink -e $0))
  46
  47 # Temp file with a list of all excluded files
  48 tempfile filter_file
  49 cat << EOF > ${filter_file}
  50 google.patch
  51 update_google_patch.sh
  52 README.chromium
  53 EOF
  54
  55 # List of all files changed relative to upstream in current branch.
  56 changed_files=$(git --no-pager diff @{u} --name-status | grep -vf ${filter_file} )
  57
  58 # Check we don't actually have files that are added or deleted, because
  59 # that can't be handled by the read-only CVS checkout.
  60 added_files=$( echo "${changed_files}" | grep "^A")
  61 if [[ ${added_files} ]] ; then
  62   echo "Script cannot handle added files"
  63   exit 1
  64 fi
  65 deleted_files=$( echo "${changed_files}" | grep "^D")
  66 if [[ ${deleted_files} ]] ; then
  67   echo "Script cannot handle deleted files"
  68   exit 1
  69 fi
  70
  71 # Generate patch between branch point from upstream and current HEAD.
  72 diff_files=$( echo "${changed_files}" | grep "^M" | cut -f1 --complement )
  73 tempfile local_patch_file
  74 echo "${diff_files}" | xargs -IXX git --no-pager diff --no-prefix @{u} -- XX > ${local_patch_file}
  75
  76 # Create copy of google.patch at branch point version.
  77 tempfile google_patch_file
  78 git show @{u}:google.patch > ${google_patch_file}
  79
  80 # Create a temporary checkout for CVS hunspell's baseline. All further work
  81 # will happen in this temp directory.
  82 cvs_dir=$(mktemp -d ${tmplate}) || exit 1
  83
  84 # Get CVS hunspell baseline.
  85 cd ${cvs_dir}
  86 echo Checking out CVS version.
  87 cvs -z3 \
  88   -qd:pserver:anonymous@hunspell.cvs.sourceforge.net:/cvsroot/hunspell \
  89   co -D "23 Mar 2012" -P hunspell
  90
  91 # Apply google.patch and changes in current branch to CVS hunspell baseline.
  92 cd hunspell
  93 echo Applying google.patch.
  94 patch -p0 -i ${google_patch_file}
  95 echo Applying local patch.
  96 patch -p0 -i ${local_patch_file}
  97
  98 # And generate a new google.patch by diffing modified CVS hunspell against CVS
  99 # hunspell baseline.
 100 echo Updating google.patch.
 101 cvs -q diff -u > ${hunspell_dir}/google.patch
 102