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 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 "$@"
  16         exit 1
  17 }
  18
  19 if test -n "$OPTIONS_SPEC"; then
  20         usage() {
  21                 exec "$0" -h
  22         }
  23
  24         parseopt_extra=
  25         [ -n "$OPTIONS_KEEPDASHDASH" ] &&
  26                 parseopt_extra="--keep-dashdash"
  27
  28         eval "$(
  29                 echo "$OPTIONS_SPEC" |
  30                         git rev-parse --parseopt $parseopt_extra -- "$@" ||
  31                 echo exit $?
  32         )"
  33 else
  34         usage() {
  35                 die "Usage: $0 $USAGE"
  36         }
  37
  38         if [ -z "$LONG_USAGE" ]
  39         then
  40                 LONG_USAGE="Usage: $0 $USAGE"
  41         else
  42                 LONG_USAGE="Usage: $0 $USAGE
  43
  44 $LONG_USAGE"
  45         fi
  46
  47         case "$1" in
  48                 -h|--h|--he|--hel|--help)
  49                 echo "$LONG_USAGE"
  50                 exit
  51         esac
  52 fi
  53
  54 set_reflog_action() {
  55         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
  56         then
  57                 GIT_REFLOG_ACTION="$*"
  58                 export GIT_REFLOG_ACTION
  59         fi
  60 }
  61
  62 git_editor() {
  63         : "${GIT_EDITOR:=$(git config core.editor)}"
  64         : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
  65         case "$GIT_EDITOR,$TERM" in
  66         ,dumb)
  67                 echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
  68                 echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
  69                 echo >&2 "Please set one of these variables to an appropriate"
  70                 echo >&2 "editor or run $0 with options that will not cause an"
  71                 echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
  72                 exit 1
  73                 ;;
  74         esac
  75         eval "${GIT_EDITOR:=vi}" '"$@"'
  76 }
  77
  78 is_bare_repository () {
  79         git rev-parse --is-bare-repository
  80 }
  81
  82 cd_to_toplevel () {
  83         cdup=$(git rev-parse --show-cdup)
  84         if test ! -z "$cdup"
  85         then
  86                 cd "$cdup" || {
  87                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
  88                         exit 1
  89                 }
  90         fi
  91 }
  92
  93 require_work_tree () {
  94         test $(git rev-parse --is-inside-work-tree) = true ||
  95         die "fatal: $0 cannot be used without a working tree."
  96 }
  97
  98 get_author_ident_from_commit () {
  99         pick_author_script='
 100         /^author /{
 101                 s/'\''/'\''\\'\'\''/g
 102                 h
 103                 s/^author \([^<]*\) <[^>]*> .*$/\1/
 104                 s/'\''/'\''\'\'\''/g
 105                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 106
 107                 g
 108                 s/^author [^<]* <\([^>]*\)> .*$/\1/
 109                 s/'\''/'\''\'\'\''/g
 110                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 111
 112                 g
 113                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
 114                 s/'\''/'\''\'\'\''/g
 115                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 116
 117                 q
 118         }
 119         '
 120         encoding=$(git config i18n.commitencoding || echo UTF-8)
 121         git show -s --pretty=raw --encoding="$encoding" "$1" |
 122         LANG=C LC_ALL=C sed -ne "$pick_author_script"
 123 }
 124
 125 # Make sure we are in a valid repository of a vintage we understand,
 126 # if we require to be in a git repository.
 127 if test -z "$NONGIT_OK"
 128 then
 129         if [ -z "$SUBDIRECTORY_OK" ]
 130         then
 131                 : ${GIT_DIR=.git}
 132                 test -z "$(git rev-parse --show-cdup)" || {
 133                         exit=$?
 134                         echo >&2 "You need to run this command from the toplevel of the working tree."
 135                         exit $exit
 136                 }
 137         else
 138                 GIT_DIR=$(git rev-parse --git-dir) || {
 139                     exit=$?
 140                     echo >&2 "Failed to find a valid git directory."
 141                     exit $exit
 142                 }
 143         fi
 144         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 145                 echo >&2 "Unable to determine absolute path of git directory"
 146                 exit 1
 147         }
 148         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 149 fi