vim-patch: Add -g switch to download/preprocess patch

scripts/vim-patch.sh

@@ -25,6 +25,9 @@ usage() {
   echo "    -p {vim-revision}  Download and apply the Vim patch vim-revision."
   echo "                       vim-revision can be a version number of the "
   echo "                       format '7.4.xxx' or a Git commit hash."
+  echo "    -g {vim-revision}  Download the Vim patch vim-revision."
+  echo "                       vim-revision can be a version number of the "
+  echo "                       format '7.4.xxx' or a Git commit hash."
   echo "    -s                 Submit a vim-patch pull request to Neovim."
   echo "    -r {pr-number}     Review a vim-patch pull request to Neovim."
   echo
@@ -166,9 +169,21 @@ get_vim_patch() {
     >&2 echo "✘ Couldn't find Vim revision '${vim_commit}'."
     exit 3
   }
-  echo "✔ Found Vim revision '${vim_commit}'."
   echo "✔ Found Vim revision '${vim_commit}'."
 
+  local patch_content
+  patch_content="$(git --no-pager show --color=never -1 --pretty=medium "${vim_commit}")"
+
+  cd "${NVIM_SOURCE_DIR}"
+
+  printf "Creating patch...\n"
+  echo "$patch_content" > "${NVIM_SOURCE_DIR}/${patch_file}"
+
+  printf "Pre-processing patch...\n"
+  preprocess_patch "${NVIM_SOURCE_DIR}/${patch_file}"
+
+  printf "✔ Saved patch to '${NVIM_SOURCE_DIR}/${patch_file}'.\n"
+}
 
 stage_patch() {
   get_vim_patch "$1"
@@ -183,6 +198,7 @@ get_vim_patch() {
     echo "  branch; not creating a new branch."
   else
     printf "\nFetching '${git_remote}/master'.\n"
+    output="$(git fetch "${git_remote}" master 2>&1)" &&
       echo "✔ ${output}" ||
       (echo "✘ ${output}"; false)
 
@@ -196,14 +212,6 @@ get_vim_patch() {
   fi
 
   printf "\nCreating empty commit with correct commit message.\n"
-  output="$(commit_message | git commit --allow-empty --file 2>&1 -)" &&
-    echo "✔ ${output}" ||
-    (echo "✘ ${output}"; false)
-
-  printf "Creating patch...\n"
-  echo "$patch_content" > "${NVIM_SOURCE_DIR}/${patch_file}"
-
-  printf "Pre-processing patch...\n"
   output="$(commit_message | git commit --allow-empty --file 2>&1 -)" &&
     echo "✔ ${output}" ||
     (echo "✘ ${output}"; false)
@@ -218,8 +226,7 @@ get_vim_patch() {
   current branch, call '${BASENAME} -p' again.
     * Do this only for _related_ patches (otherwise it increases the
       size of the pull request, making it harder to review)
-
-  When you're done, try '${BASENAME} -s' to create the pull request.
+
   When you're done, try '${BASENAME} -s' to create the pull request.
 
   See the wiki for more information:
@@ -430,7 +437,7 @@ review_pr() {
       fi
     fi
   done
-
+
   clean_files
 }
 
@@ -441,6 +448,10 @@ while getopts "hlp:r:s" opt; do
       exit 0
       ;;
     l)
+      list_vim_patches
+      exit 0
+      ;;
+    p)
       stage_patch "${OPTARG}"
       exit 0
       ;;