build/git-hooks/pre-commit

   1 #!/bin/sh
   2
   3 submodule_diff() {
   4   if test -n "$2"; then
   5     git diff-tree -r --ignore-submodules=dirty "$1" "$2" | grep -e '^:160000' -e '^:...... 160000' | xargs
   6   else
   7     git diff-index --cached --ignore-submodules=dirty "$1" | grep -e '^:160000' -e '^:...... 160000' | xargs
   8   fi
   9 }
  10
  11 if git rev-parse --verify --quiet --no-revs MERGE_HEAD; then
  12   merge_base=$(git merge-base HEAD MERGE_HEAD)
  13   if test -z "$(submodule_diff $merge_base HEAD)"; then
  14     # Most up-to-date submodules are in MERGE_HEAD.
  15     head_ref=MERGE_HEAD
  16   else
  17     # Most up-to-date submodules are in HEAD.
  18     head_ref=HEAD
  19   fi
  20 else
  21   # No merge in progress. Submodules must match HEAD.
  22   head_ref=HEAD
  23 fi
  24
  25 submods=$(submodule_diff $head_ref)
  26 if test "$submods"; then
  27   echo "You are trying to commit changes to the following submodules:" 1>&2
  28   echo 1>&2
  29   echo $submods | cut -d ' ' -f 6 | sed 's/^/  /g' 1>&2
  30   cat <<EOF 1>&2
  31
  32 Submodule commits are not allowed.  Please run:
  33
  34   git status --ignore-submodules=dirty
  35
  36 and/or:
  37
  38   git diff-index --cached --ignore-submodules=dirty HEAD
  39
  40 ... to see what's in your index.
  41
  42 If you're really and truly trying to roll the version of a submodule, you should
  43 commit the new version to DEPS, instead.
  44 EOF
  45   exit 1
  46 fi
  47
  48 gitmodules_diff() {
  49   git diff-index --cached "$1" .gitmodules
  50 }
  51
  52 if [ "$(git ls-files .gitmodules)" ] && [ "$(gitmodules_diff $head_ref)" ]; then
  53   cat <<EOF 1>&2
  54 You are trying to commit a change to .gitmodules.  That is not allowed.
  55 To make changes to submodule names/paths, edit DEPS.
  56 EOF
  57   exit 1
  58 fi
  59
  60 exit 0