[hunspell] Script to automatically generate google.patch

update_google_patch.sh

Index: update_google_patch.sh
diff --git a/update_google_patch.sh b/update_google_patch.sh
new file mode 100755
index 0000000000000000000000000000000000000000..bcff469dc43928e1578e4ca8072a10fa9c569fa5
--- /dev/null
+++ b/update_google_patch.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+
+# Copyright (c) 2014 The Chromium Authors. All rights reserved.

[brettw, 2014/05/29 17:06:17]

Remove the "(c)"

(see http://www.chromium.org/developers/coding-style )

[groby-ooo-7-16, 2014/05/29 17:37:48]

Done.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Creates an updated google.patch that reflects all checked-in  changes in the

[brettw, 2014/05/29 17:06:17]

Got two spaces after "in"

Can this list some more background of what exactly your repo should look like
here, and an overview of what this script does? For example, I was initially
confused about what it diffed against until I realized it actually seems to
check out the CVS code to diff against. You're also doing some git diff
operations which imply that you're on a branch and the upstream branch has some
specific meaning.

This script seems to update Hunspell. Naming it update_google_patch implies to
me that it just generates the diff file. Maybe a different name is in order
(actually, the existing sentence in the README you modified is similarly
misleading).

[groby-ooo-7-16, 2014/05/29 17:37:48]

Done. (Two spaces after in - comment discussion moved into replies)

+# current branch.
+cvs_dir=""
+
+tempfiles=( )
+tmplate="/tmp/`basename $0`.XXXXXX"
+
+function cleanup() {
+  if [[ $cvs_dir ]]; then
+    rm -r "${cvs_dir}"
+  fi
+
+  if [[ ${tempfiles[@]} ]]; then
+    rm "${tempfiles[@]}"
+  fi
+  cd ${starting_dir}
+}
+
+trap cleanup 0
+
+# Generate a temp file and register it for cleanup
+function tempfile() {
+  local result=$1
+  local tmpfile=$(mktemp ${tmplate}) || exit 1
+  tempfiles+=( "${tmpfile}" )
+  eval $result="'$tmpfile'"
+}
+
+starting_dir=$(pwd)
+hunspell_dir=$(dirname $(readlink -e $0))
+tempfile filter_file
+
+# Temp file with a list of all excluded files
+cat << EOF > ${filter_file}
+google.patch
+update_google_patch.sh
+README.chromium
+EOF
+
+# List of all files changed relative to upstream
+changed_files=$(git --no-pager diff @{u} --name-status | grep -vf ${filter_file} )
+
+# Check we don't actually have files that are added or deleted, because
+# that can't be handled by the read-only CVS checkout.
+added_files=$( echo "${changed_files}" | grep "^A")
+if [[ ${added_files} ]] ; then
+  echo "Script cannot handle added files"
+  exit 1
+fi
+deleted_files=$( echo "${changed_files}" | grep "^D")
+if [[ ${deleted_files} ]] ; then
+  echo "Script cannot handle deleted files"
+  exit 1
+fi
+
+# Generate patch between branch point and current status.
+diff_files=$( echo "${changed_files}" | grep "^M" | cut -f1 --complement )
+tempfile local_patch_file
+echo "${diff_files}" | xargs -IXX git --no-pager diff --no-prefix @{u} -- XX > ${local_patch_file}
+
+# Create copy of google.patch at branch point version.
+tempfile google_patch_file
+git show @{u}:google.patch > ${google_patch_file}
+
+# Create a temporary checkout for hunspell
+cvs_dir=$(mktemp -d ${tmplate}) || exit 1
+
+# Get hunspell
+cd ${cvs_dir}
+echo Checking out CVS version.
+cvs -z3 \
+  -qd:pserver:anonymous@hunspell.cvs.sourceforge.net:/cvsroot/hunspell \
+  co -D "23 Mar 2012" -P hunspell
+
+# Apply both google.patch and changes in the current branch
+cd hunspell
+echo Applying google.patch.
+patch -p0 -i ${google_patch_file}
+echo Applying local patch.
+patch -p0 -i ${local_patch_file}
+
+# And generate a new google.patch
+echo Updating google.patch.
+cvs -q diff -u > ${hunspell_dir}/google.patch
+