git-sh-setup.sh

   1 #!/bin/sh
   2 #
   3 # This is included in commands that either have to be run from the toplevel
   4 # of the repository, or with GIT_DIR environment variable properly.
   5 # If the GIT_DIR does not look like the right correct git-repository,
   6 # it dies.
   7
   8 # Having this variable in your environment would break scripts because
   9 # you would cause "cd" to be be taken to unexpected places.  If you
  10 # like CDPATH, define it for your interactive shell sessions without
  11 # exporting it.
  12 unset CDPATH
  13
  14 die() {
  15         echo >&2 "$@"
  16         exit 1
  17 }
  18
  19 usage() {
  20         die "Usage: $0 $USAGE"
  21 }
  22
  23 set_reflog_action() {
  24         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
  25         then
  26                 GIT_REFLOG_ACTION="$*"
  27                 export GIT_REFLOG_ACTION
  28         fi
  29 }
  30
  31 is_bare_repository () {
  32         git rev-parse --is-bare-repository
  33 }
  34
  35 cd_to_toplevel () {
  36         cdup=$(git rev-parse --show-cdup)
  37         if test ! -z "$cdup"
  38         then
  39                 cd "$cdup" || {
  40                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
  41                         exit 1
  42                 }
  43         fi
  44 }
  45
  46 require_work_tree () {
  47         test $(git rev-parse --is-inside-work-tree) = true &&
  48         test $(git rev-parse --is-inside-git-dir) = false ||
  49         die "fatal: $0 cannot be used without a working tree."
  50 }
  51
  52 get_author_ident_from_commit () {
  53         pick_author_script='
  54         /^author /{
  55                 s/'\''/'\''\\'\'\''/g
  56                 h
  57                 s/^author \([^<]*\) <[^>]*> .*$/\1/
  58                 s/'\''/'\''\'\'\''/g
  59                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
  60
  61                 g
  62                 s/^author [^<]* <\([^>]*\)> .*$/\1/
  63                 s/'\''/'\''\'\'\''/g
  64                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
  65
  66                 g
  67                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
  68                 s/'\''/'\''\'\'\''/g
  69                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
  70
  71                 q
  72         }
  73         '
  74         encoding=$(git config i18n.commitencoding || echo UTF-8)
  75         git show -s --pretty=raw --encoding="$encoding" "$1" |
  76         LANG=C LC_ALL=C sed -ne "$pick_author_script"
  77 }
  78
  79 if [ -z "$LONG_USAGE" ]
  80 then
  81         LONG_USAGE="Usage: $0 $USAGE"
  82 else
  83         LONG_USAGE="Usage: $0 $USAGE
  84
  85 $LONG_USAGE"
  86 fi
  87
  88 case "$1" in
  89         -h|--h|--he|--hel|--help)
  90         echo "$LONG_USAGE"
  91         exit
  92 esac
  93
  94 # Make sure we are in a valid repository of a vintage we understand.
  95 if [ -z "$SUBDIRECTORY_OK" ]
  96 then
  97         : ${GIT_DIR=.git}
  98         GIT_DIR=$(GIT_DIR="$GIT_DIR" git rev-parse --git-dir) || {
  99                 exit=$?
 100                 echo >&2 "You need to run this command from the toplevel of the working tree."
 101                 exit $exit
 102         }
 103 else
 104         GIT_DIR=$(git rev-parse --git-dir) || exit
 105 fi
 106 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}