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