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