Add helper script for porting vim patches.

scripts/vim-patch.sh

@@ -0,0 +1,81 @@
+#!/bin/bash -e
+
+NEOVIM_SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+VIM_SOURCE_DIR_DEFAULT=${NEOVIM_SOURCE_DIR}/build/vim
+VIM_SOURCE_DIR="${VIM_SOURCE_DIR:-${VIM_SOURCE_DIR_DEFAULT}}"
+
+if [[ ${#} != 1 ]]; then
+  >&2 echo "Helper script for porting Vim patches. For more information,"
+  >&2 echo "see https://github.com/neovim/neovim/wiki/Merging-patches-from-upstream-vim."
+  >&2 echo
+  >&2 echo "Usage: ${0} vim-version"
+  >&2 echo "vim-version must be in format '7.4.xxx'."
+  >&2 echo
+  >&2 echo "Set VIM_SOURCE_DIR to change where Vim's sources are stored."
+  >&2 echo "The default is '${VIM_SOURCE_DIR_DEFAULT}'."
+  exit 1
+fi
+
+vim_version="${1}"
+if [[ ! ${vim_version} =~ [0-9]\.[0-9]\.[0-9][0-9][0-9] ]]; then
+  >&2 echo "vim-version must be in format '7.4.xxx'."
+  exit 2
+fi
+
+if [[ ! -d ${VIM_SOURCE_DIR} ]]; then
+  echo "Cloning Vim sources into '${VIM_SOURCE_DIR}'."
+  hg clone https://code.google.com/p/vim ${VIM_SOURCE_DIR}
+  cd ${VIM_SOURCE_DIR}
+else
+  echo "Updating Vim sources in '${VIM_SOURCE_DIR}'."
+  cd ${VIM_SOURCE_DIR}
+  hg pull --update
+fi
+
+vim_tag="v${vim_version//./-}"
+echo "Using Vim tag '${vim_tag}'."
+
+hg log --rev ${vim_tag} >/dev/null 2>&1 || {
+  >&2 echo "Couldn't find Vim tag '${vim_tag}'."
+  exit 3
+}
+
+vim_full="$(hg log --patch --git --verbose --rev ${vim_tag})"
+vim_message="$(hg log --template "{desc}" --rev ${vim_tag} \
+  | sed -e '1d')" # Remove first line of commit message.
+vim_diff="$(hg diff --show-function --git --change ${vim_tag} \
+  | sed -e 's/\( [ab]\/src\)/\1\/nvim/g')" # Change directory to src/nvim.
+
+
+neovim_branch="vim-${vim_version}"
+echo
+echo "Creating Neovim branch '${neovim_branch}'."
+cd ${NEOVIM_SOURCE_DIR}
+git checkout -b "${neovim_branch}"
+
+echo
+echo "Saving patch to '${NEOVIM_SOURCE_DIR}/${neovim_branch}.patch'."
+echo "${vim_diff}" > ${NEOVIM_SOURCE_DIR}/${neovim_branch}.patch
+
+echo "Saving full commit details to '${NEOVIM_SOURCE_DIR}/${neovim_branch}.commit'."
+echo "${vim_full}" > ${NEOVIM_SOURCE_DIR}/${neovim_branch}.commit
+
+echo
+echo "Creating empty Neovim commit with correct commit message."
+neovim_message="
+vim-patch:${vim_version}
+
+${vim_message}
+
+https://code.google.com/p/vim/source/detail?r=${vim_tag}"
+
+git commit --allow-empty --file - <<< "${neovim_message}"
+
+echo
+echo "Proceed to port the patch and stage your changes ('git add ...')."
+echo "Then use 'git commit --amend' to commit."
+echo "Push your changes with 'git push origin ${neovim_branch}' and create a"
+echo "pull request called '[RFC] vim-patch:${vim_version}'."
+echo
+echo "See https://github.com/neovim/neovim/wiki/Merging-patches-from-upstream-vim"
+echo "for more information."