backup_git_dirs

   1 #!/bin/bash
   2 # The MIT License (MIT)
   3 #
   4 # Copyright (c) 2011-2016 Ismaël Bouya http://www.normalesup.org/~bouya/
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a copy
   7 # of this software and associated documentation files (the "Software"), to deal
   8 # in the Software without restriction, including without limitation the rights
   9 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 # copies of the Software, and to permit persons to whom the Software is
  11 # furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice shall be included in
  14 # all copies or substantial portions of the Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 # THE SOFTWARE.
  23
  24 REMOTE=origin
  25 REF_NS=auto_backup
  26
  27 function backup_refs() {
  28   pushd "$1" > /dev/null
  29
  30   if git rev-parse --git-dir > /dev/null 2>&1; then
  31     git for-each-ref --format='%(refname)' refs/$REF_NS | while read ref; do
  32       git update-ref -d "$ref"
  33     done
  34
  35     git for-each-ref --format='%(refname)' refs/heads refs/tags | while read ref; do
  36       new_ref=$(echo "$ref" | sed -e "s@^refs/@refs/$REF_NS/@")
  37       git update-ref $new_ref $ref
  38     done
  39
  40     stash=0
  41     git reflog --pretty=tformat:'%H' refs/stash 2>/dev/null | while read ref; do
  42       git update-ref refs/$REF_NS/stash/stash_$stash $ref
  43       stash=$(($stash + 1))
  44     done
  45
  46     export GIT_INDEX_FILE=`mktemp /tmp/git-backup-index.XXXXXX`
  47     git read-tree HEAD
  48     head_commit=$(git show-ref --hash --head ^HEAD)
  49     git add .
  50     COMMIT=`git commit-tree $(git write-tree) -p $head_commit -m "Automatic backup"`
  51     git update-ref refs/$REF_NS/workdir $COMMIT
  52     rm -f "$GIT_INDEX_FILE"
  53     unset GIT_INDEX_FILE
  54
  55     if git remote | grep -q "^$REMOTE$"; then
  56       git push -q --force $REMOTE "refs/$REF_NS/*:refs/$REF_NS/*"
  57       git for-each-ref --format='%(refname)' refs/$REF_NS | while read ref; do
  58         git update-ref -d "$ref"
  59       done
  60       # Pour récupérer:
  61       # git fetch $REMOTE --force "refs/$REF_NS/*:refs/$REF_NS/*"
  62     fi
  63   fi
  64
  65   popd > /dev/null
  66 }
  67
  68 for directory in "$@"; do
  69   backup_refs $directory
  70 done