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="$*"
  27                 export GIT_REFLOG_ACTION
  28         fi
  29 }
  30
  31 git_editor() {
  32         GIT_EDITOR=${GIT_EDITOR:-$(git config core.editor || echo ${VISUAL:-${EDITOR}})}
  33         case "$GIT_EDITOR,$TERM" in
  34         ,dumb)
  35                 echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
  36                 echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
  37                 echo >&2 "Please set one of these variables to an appropriate"
  38                 echo >&2 "editor or run $0 with options that will not cause an"
  39                 echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
  40                 exit 1
  41                 ;;
  42         esac
  43         "${GIT_EDITOR:-vi}" "$1"
  44 }
  45
  46 is_bare_repository () {
  47         git rev-parse --is-bare-repository
  48 }
  49
  50 cd_to_toplevel () {
  51         cdup=$(git rev-parse --show-cdup)
  52         if test ! -z "$cdup"
  53         then
  54                 cd "$cdup" || {
  55                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
  56                         exit 1
  57                 }
  58         fi
  59 }
  60
  61 require_work_tree () {
  62         test $(git rev-parse --is-inside-work-tree) = true ||
  63         die "fatal: $0 cannot be used without a working tree."
  64 }
  65
  66 get_author_ident_from_commit () {
  67         pick_author_script='
  68         /^author /{
  69                 s/'\''/'\''\\'\'\''/g
  70                 h
  71                 s/^author \([^<]*\) <[^>]*> .*$/\1/
  72                 s/'\''/'\''\'\'\''/g
  73                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
  74
  75                 g
  76                 s/^author [^<]* <\([^>]*\)> .*$/\1/
  77                 s/'\''/'\''\'\'\''/g
  78                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
  79
  80                 g
  81                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
  82                 s/'\''/'\''\'\'\''/g
  83                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
  84
  85                 q
  86         }
  87         '
  88         encoding=$(git config i18n.commitencoding || echo UTF-8)
  89         git show -s --pretty=raw --encoding="$encoding" "$1" |
  90         LANG=C LC_ALL=C sed -ne "$pick_author_script"
  91 }
  92
  93 if [ -z "$LONG_USAGE" ]
  94 then
  95         LONG_USAGE="Usage: $0 $USAGE"
  96 else
  97         LONG_USAGE="Usage: $0 $USAGE
  98
  99 $LONG_USAGE"
 100 fi
 101
 102 case "$1" in
 103         -h|--h|--he|--hel|--help)
 104         echo "$LONG_USAGE"
 105         exit
 106 esac
 107
 108 # Make sure we are in a valid repository of a vintage we understand.
 109 if [ -z "$SUBDIRECTORY_OK" ]
 110 then
 111         : ${GIT_DIR=.git}
 112         GIT_DIR=$(GIT_DIR="$GIT_DIR" git rev-parse --git-dir) || {
 113                 exit=$?
 114                 echo >&2 "You need to run this command from the toplevel of the working tree."
 115                 exit $exit
 116         }
 117 else
 118         GIT_DIR=$(git rev-parse --git-dir) || exit
 119 fi
 120 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}