ENH: Refactor UpdateDoubleConversionFromGoogle.sh

Closes #3193.

Modules/ThirdParty/DoubleConversion/UpdateDoubleConversionFromGoogle.sh

@@ -1,115 +1,27 @@
-#!/bin/bash
-#
-# UpdateDoubleConversionFromGoogle.sh
-#
-# This file gives the commands needed to merge upstream changes
-# from the Google Code repository for double-conversion.
-# It is based on work by Brad King that is used to update VNL.
-#
-# See ITK/Modules/ThirdParty/VNL/src/README-ITK.txt
-# for more commentary on how this update process works.
-#
-echo "-------------------------------------------------------"
-echo This script will update source code for the double-conversion
-echo library from http://code.google.com
-echo "-------------------------------------------------------"
-if [ ! -f Modules/ThirdParty/DoubleConversion/src/README.md ]
-then
-    echo The current working directory $(pwd) is not the top level
-    echo of the ITK source code tree. Please change to the
-    echo ITK source directory and re-run this script
-    exit 1
-fi
-#
-# Once the merge has been done
-# EDIT THIS SCRIPT to change the hash tag at which to begin the
-# next update...
-#
-# This merge done May 31, 2017
-git branch DoubleConversion-upstream 0d3733a4168dd739f45cef8a55718f8b02ee3073
+#!/usr/bin/env bash
 
-#
-# Make a temp directory to handle the import of the upstream source
-mkdir DoubleConversion-Tmp
-cd DoubleConversion-Tmp
-#
-# base a temporary git repo off of the parent ITK directory
-git init
-#
-# pull in the upstream branch
-git pull .. DoubleConversion-upstream
-#
-# empty out all existing source
-rm -rf *
-#
-# download and copy the necessary double-conversion source
-echo Cloning upstream HEAD from code.google.com
-echo NOTE: to check out a particular revision for merging
-echo you have to add a git checkout '<hash>'
-echo or git checkout '<branchname>'
-echo after the git clone command
-git clone https://github.com/google/double-conversion
-#
-# recover the upstream commit date.
-cd double-conversion
-upstream_date="$(git log -n 1 --format='%cd')"
-upstream_sha="$(git rev-parse HEAD)"
-cd ..
+set -e
+set -x
+shopt -s dotglob
 
-#
-# Check to see if LICENSE file changed -- if changed, fix in a separate
-# commit.
-if  diff double-conversion/LICENSE ../Modules/ThirdParty/DoubleConversion/src/LICENSE
-then
-    echo LICENSE file unchanged
-else
-    echo The double-conversion LICENSE file has changed.  Please
-    echo add the change in a separate commit by hand and run this script again.
-    exit 1
-fi
+readonly name="DoubleConversion"
+readonly ownership="Google double-conversion Maintainers <floitsch@google.com>"
+readonly subtree="Modules/ThirdParty/DoubleConversion/src/double-conversion"
+readonly repo="https://github.com/google/double-conversion"
+readonly tag="master"
+readonly paths="
+double-conversion/*.h
+double-conversion/*.cc
+"
 
-cp -r double-conversion/double-conversion/* .
-# get rid of double-conversion clone
-rm -fr double-conversion
-#
-# add upstream files in Git
-git add --all
 
-#
-# commit new source
-GIT_AUTHOR_NAME='Google double-conversion Maintainers' \
-GIT_AUTHOR_EMAIL='floitsch@google.com' \
-GIT_AUTHOR_DATE="${upstream_date}" \
-git commit -q -m "Google double-conversion (reduced)
+extract_source () {
+    git_archive
+    pushd "${extractdir}/${name}-reduced"
+    mv double-conversion/* .
+    rmdir double-conversion
+    echo "* -whitespace" >> .gitattributes
+    popd
+}
 
-This corresponds to commit hash
-  ${upstream_sha}
-from Google repository
-  http://code.google.com/p/double-conversion"
-
-#
-# push to the DoubleConversion-upstream branch in the
-# ITK tree
-git push .. HEAD:DoubleConversion-upstream
-cd ..
-#
-# get rid of temporary repository
-rm -fr DoubleConversion-Tmp
-#
-# checkout a new update branch off of the master.
-git checkout -b DoubleConversion-update master
-#
-# use subtree merge to bring in upstream changes
-git merge -s recursive -X subtree=Modules/ThirdParty/DoubleConversion/src/double-conversion DoubleConversion-upstream
-echo "---------------------------------"
-echo NOW Fix all conflicts and test new code.
-echo "---------------------------------"
-echo Commit the merged/fixed/verified code and run this command
-echo git rev-parse --short=16 DoubleConversion-upstream
-echo "---------------------------------"
-echo to get the commit hash from which the DoubleConversion-upstream
-echo branch must be started on the next update.
-echo "---------------------------------"
-echo edit the line \"git branch DoubleConversion-upstream\" above.
-echo Once you have commited this change to the UpdateDoubleConversionFromGoogle.sh script,
-echo use \"git gerrit-push\" to push this new update branch back to itk.org.
+. "${BASH_SOURCE%/*}/../../../Utilities/Maintenance/update-third-party.bash"