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

crup-runner.sh

-#!/bin/bash
-
-update_toplevel () {
-  # Don't "pull" if checkout is not on a named branch
-  if test "$2" = "pull" && ( ! git symbolic-ref HEAD >/dev/null 2>/dev/null ); then
-    first_args="$1 fetch"
-  else
-    first_args="$1 $2"
-  fi
-  shift 2
-  echo "[$solution] $first_args $@" 1>&2
-  $first_args $@ | sed "s/^/[$solution] /g" 1>&2
-  status=$?
-  if [ "$status" -ne 0 ]; then
-    exit $status
-  fi
-}
-
-set_target_os () {
-  # Get the os we're building for.  On first run, this will be unset.
-  target_os=$(git config --get-all target.os 2>/dev/null)
-  if [ -z "$target_os" ]; then
-    case $(uname -s) in
-      Linux) target_os=unix ;;
-      Darwin) target_os=mac ;;
-      CYGWIN*|MINGW*) target_os=win ;;
-      *)
-        echo "[$solution] *** No target.os set in .git/config, and I can't" 1>&2
-        echo "[$solution] *** figure it out from 'uname -s'" 1>&2
-        exit 1
-        ;;
-    esac
-    git config target.os "$target_os"
-  fi
-}
-
-update_submodule_url () {
-  # If the submodule's URL in .gitmodules has changed, propagate the new
-  # new URL down.  This is the same as `git submodule sync`, but we do it
-  # this way because `git submodule sync` is absurdly slow.
-  new_url=$(git config -f .gitmodules "submodule.$1.url" 2>/dev/null)
-  old_url=$(git config "submodule.$1.url" 2>/dev/null)
-  if [ "$new_url" != "$old_url" ]; then
-    git config "submodule.$1.url" "$new_url"
-    if [ -e "$1"/.git ]; then
-      ( cd $submod && git config remote.origin.url "$new_url" )
-    fi
-  fi
-}
-
-process_submodule () {
-  # Check whether this submodule should be ignored or updated.
-  # If it's a new submodule, match the os specified in .gitmodules against
-  # the os specified in .git/config.
-  update_policy=$(git config --get "submodule.$1.update")
-  if [ -z "$update_policy" ]; then
-    submod_os=$(git config -f .gitmodules --get "submodule.$1.os")
-    if [ -n "$submod_os" -a "$submod_os" != "all" ]; then
-      update_policy=none
-      for os in $target_os; do
-        if [ "${submod_os/${os}/}" != "${submod_os}" ]; then
-          update_policy=checkout
-        fi
-      done
-    else
-      update_policy=checkout
-    fi
-    if [ "$update_policy" != "none" ]; then
-      git submodule --quiet init "$1"
-    fi
-    git config "submodule.$1.update" $update_policy
-  fi
-  ignore_policy=$(git config --get "submodule.$1.ignore")
-  if [ -z "$ignore_policy" ]; then
-    git config "submodule.$1.ignore" all
-  fi
-  if [ "$update_policy" != "none" ]; then
-    update_submodule_url "$1"
-    echo "$solution/$1"
-  fi
-}
-
-if [ -z "$*" ]; then
-  exit 0
-fi
-set -o pipefail
-dir="$1"
-solution="${1%%/*}"
-cd "$solution" 1>/dev/null
-
-if [ "$solution" = "$1" ]; then
-  # Skip git checkouts not managed by crup.
-  gitdir="$(git rev-parse --git-dir)"
-  if ! grep -q -s "The Chromium Authors" "$gitdir/description"; then
-    echo "Skipping unmanaged git directory $1" 1>&2
-    exit 0
-  fi
-
-  # Set default behavior to ignore diffs in submodule checkouts
-  diff_policy=$(git config --get "diff.ignoreSubmodules")
-  if [ -z "$diff_policy" ]; then
-    git config diff.ignoreSubmodules all
-  fi
-
-  # Don't "pull" if checkout is not on a named branch
-  shift
-  if test $# -ne 0; then
-    update_toplevel "$@"
-  fi
-
-  set_target_os
-
-  git ls-files -s | grep ^160000 | awk '{print $4}' |
-  while read submod; do
-    process_submodule "$submod"
-  done
-  status=$?
-else
-  submodule="${1#*/}"
-  echo "[$solution] updating $submodule"
-  git submodule update --recursive --quiet "$submodule" |
-  ( grep -v '^Skipping submodule' || true ) | sed "s|^|[$1] |g" 2>/dev/null
-  status=$?
-  if [ "$status" -ne "0" ]; then
-    echo "[$solution] FAILED to update $submodule"
-  fi
-fi
-exit $status