Remove git-cr{up,sync} and replace with informative shell script.

git-crup

 #!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# A convenience script to largely replicate the behavior of `gclient sync` in a
-# submodule-based checkout.  Fetches latest commits for top-level solutions;
-# updates submodules; and runs post-sync hooks.
+TOPLEVEL=$(git rev-parse --show-toplevel)
+TOPPERLEVEL=$(dirname $TOPLEVEL)
 
-orig_args="$@"
-ECHO=
-pull=pull
-pull_args=
-hooks=yes
-j=10
-crup_runner="crup-runner.sh"
+cat <<EOF
+Sorry `whoami`, but the git-submodule flow has been deprecated in order to
+simplify the plethora of SCM choices, and to pave the way towards a git-only
+chromium development flow.
 
-usage() {
-  cat <<EOF
-Usage: git-crup [-n|--dry-run] [--fetch|--sync] [-j|--jobs [jobs]]
-    [--no-hooks] [<args to git-pull or git-fetch>]
+Please consult https://code.google.com/p/chromium/wiki/UsingGitSubmodules#Convert_from_submodules_to_gclient
+for instructions on how to convert your submodule checkout to gclient.
 
-    -n, --dry-run        Don't do anything; just show what would have been done.
-    --fetch              Run 'git fetch' on top-level sources, but don't merge.
-    --sync               Don't do anything at all to the top-level sources.
-    -j, --jobs           Run this many jobs in parallel.
-    --no-hooks           Don't run hooks (e.g., to generate build files) after
-                         updating.
+The simplest chromium and/or blink instructions follow for convenience.
+
+1. Make sure the parent directory of this checkout is empty, besides this repo:
+$ ls $TOPPERLEVEL
 EOF
-}
+ls "$TOPPERLEVEL"
+if [[ "$(ls "$TOPPERLEVEL")" != 'src' ]]
+then
+  echo Please move this repo to its own directory before continuing!!!
+fi
+echo
 
-serial_update() {
-  ( cd "$1"
-    if test -n "$toplevel_cmd"; then
-      $ECHO $toplevel_cmd | sed "s/^/[$1] /g"
-      if [ $? -ne 0 ]; then
-        return $?
-      fi
-    fi
-    $ECHO git submodule --quiet sync
-    $ECHO git ls-files -s | grep ^160000 | awk '{print $4}' |
-    while read submod; do
-      $ECHO "$crup_runner" "$1/$submod"
-    done
-  )
-}
+cat <<EOF
+2. Please add a .gclient file to $TOPPERLEVEL/.gclient of the form:
+# ======== .gclient begins =========
+solutions = [{
+  'name': '$(basename "$TOPLEVEL")',
+  'url': 'https://chromium.googlesource.com/chromium/src.git',
+  'managed': False,
+  'deps_file': '.DEPS.git',
+  # Uncomment the following if you're doing blink development
+  # 'custom_vars': {'webkit_rev': ''},
+}]
+# ======== .gclient ends =========
 
-while test $# -ne 0; do
-  case "$1" in
-    -j[0-9]*)
-      j=$(echo "$1" | cut -c3-)
-      ;;
-    --jobs=[0-9]*)
-      j=$(echo "$1" | cut -c8-)
-      ;;
-    -j|--jobs)
-      case "$2" in
-        ''|-*)
-          j=0
-          ;;
-        *)
-          j="$2"
-          shift
-          ;;
-      esac
-      ;;
-    -n|--dry-run)
-      ECHO=echo
-      ;;
-    -h|--help)
-      usage
-      exit 0
-      ;;
-    --fetch)
-      pull=fetch
-      ;;
-    --sync)
-      pull=
-      ;;
-    --no-hooks|--nohooks)
-      hooks=no
-      ;;
-    *)
-      pull_args="$pull_args $1"
-      break
-      ;;
-  esac
-  shift
-done
+3. Run \`gclient sync\` to synchronize dependencies in your checkout instead of $(basename "$0")!
+EOF
 
-# Auto-update depot_tools.
-if [ -z "$GIT_CRUP_REINVOKE" ]; then
-  kernel_name="\$(uname -s)"
-  if [ "\${kernel_name:0:5}" = "MINGW" ]; then
-    cmd '/C update_depot_tools.bat'
-  else
-    update_depot_tools
-  fi
-  GIT_CRUP_REINVOKE=1 exec bash "$0" $orig_args
-fi
-
-while test "$PWD" != "/"; do
-  if test -f "$PWD/src/.gitmodules"; then
-    break
-  fi
-  cd ..
-done
-if test "$PWD" = "/"; then
-  echo "Could not find the root of your checkout; aborting." 1>&2
-  exit 1
-fi
-
-export GIT_MERGE_AUTOEDIT=no
-
-if ( echo test | xargs --max-lines=1 true 2>/dev/null ); then
-  max_lines="--max-lines=1"
-else
-  max_lines="-L 1"
-fi
-
-if ( echo test | xargs -I bar true 2>/dev/null ); then
-  replace_arg="-I replace_arg"
-else
-  replace_arg="-ireplace_arg"
-fi
-
-if ( echo test test | xargs -P 2 true 2>/dev/null ); then
-  xargs_parallel=yes
-else
-  if test "$j" != "1"; then
-    echo "Warning: parallel execution is not supported on this platform." 1>&2
-  fi
-  xargs_parallel=no
-fi
-
-if test -n "$pull"; then
-  toplevel_cmd="git $pull $pull_args -q origin"
-else
-  toplevel_cmd=
-fi
-
-set -o pipefail
-if test "$xargs_parallel" = "yes"; then
-  ( ls -d */.git | sed 's/\/\.git$//' |
-   xargs $max_lines $replace_arg -P "$j" \
-       "$crup_runner" replace_arg $ECHO $toplevel_cmd |
-   xargs $max_lines -P "$j" $ECHO "$crup_runner" )
-else 
-  ls -d */.git |
-  while read gitdir; do
-    serial_update "${gitdir%%/.git}"
-  done
-fi
-
-status=$?
-
-if [ "$status" -ne 0 ]; then
-  cat 1>&2 <<EOF
-Please check the preceding terminal output for error messages.
-Run 'git submodule status' to see the current state of submodule checkouts.
-EOF
-  exit $status
-fi
-
-if [ "$hooks" = "yes" ]; then
-  $ECHO git runhooks
-  status=$?
-fi
-
-echo
-exit $status
+exit 1