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 $?
  33         )"
  34 else
  35         dashless=$(basename "$0" | sed -e 's/-/ /')
  36         usage() {
  37                 die "Usage: $dashless $USAGE"
  38         }
  39
  40         if [ -z "$LONG_USAGE" ]
  41         then
  42                 LONG_USAGE="Usage: $dashless $USAGE"
  43         else
  44                 LONG_USAGE="Usage: $dashless $USAGE
  45
  46 $LONG_USAGE"
  47         fi
  48
  49         case "$1" in
  50                 -h|--h|--he|--hel|--help)
  51                 echo "$LONG_USAGE"
  52                 exit
  53         esac
  54 fi
  55
  56 set_reflog_action() {
  57         if [ -z "${GIT_REFLOG_ACTION:+set}" ]
  58         then
  59                 GIT_REFLOG_ACTION="$*"
  60                 export GIT_REFLOG_ACTION
  61         fi
  62 }
  63
  64 git_editor() {
  65         : "${GIT_EDITOR:=$(git config core.editor)}"
  66         : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
  67         case "$GIT_EDITOR,$TERM" in
  68         ,dumb)
  69                 echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
  70                 echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
  71                 echo >&2 "Please set one of these variables to an appropriate"
  72                 echo >&2 "editor or run $0 with options that will not cause an"
  73                 echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
  74                 exit 1
  75                 ;;
  76         esac
  77         eval "${GIT_EDITOR:=vi}" '"$@"'
  78 }
  79
  80 is_bare_repository () {
  81         git rev-parse --is-bare-repository
  82 }
  83
  84 cd_to_toplevel () {
  85         cdup=$(git rev-parse --show-cdup)
  86         if test ! -z "$cdup"
  87         then
  88                 # The "-P" option says to follow "physical" directory
  89                 # structure instead of following symbolic links.  When cdup is
  90                 # "../", this means following the ".." entry in the current
  91                 # directory instead textually removing a symlink path element
  92                 # from the PWD shell variable.  The "-P" behavior is more
  93                 # consistent with the C-style chdir used by most of Git.
  94                 cd -P "$cdup" || {
  95                         echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
  96                         exit 1
  97                 }
  98         fi
  99 }
 100
 101 require_work_tree () {
 102         test $(git rev-parse --is-inside-work-tree) = true ||
 103         die "fatal: $0 cannot be used without a working tree."
 104 }
 105
 106 get_author_ident_from_commit () {
 107         pick_author_script='
 108         /^author /{
 109                 s/'\''/'\''\\'\'\''/g
 110                 h
 111                 s/^author \([^<]*\) <[^>]*> .*$/\1/
 112                 s/'\''/'\''\'\'\''/g
 113                 s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 114
 115                 g
 116                 s/^author [^<]* <\([^>]*\)> .*$/\1/
 117                 s/'\''/'\''\'\'\''/g
 118                 s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 119
 120                 g
 121                 s/^author [^<]* <[^>]*> \(.*\)$/\1/
 122                 s/'\''/'\''\'\'\''/g
 123                 s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 124
 125                 q
 126         }
 127         '
 128         encoding=$(git config i18n.commitencoding || echo UTF-8)
 129         git show -s --pretty=raw --encoding="$encoding" "$1" -- |
 130         LANG=C LC_ALL=C sed -ne "$pick_author_script"
 131 }
 132
 133 # Make sure we are in a valid repository of a vintage we understand,
 134 # if we require to be in a git repository.
 135 if test -z "$NONGIT_OK"
 136 then
 137         GIT_DIR=$(git rev-parse --git-dir) || exit
 138         if [ -z "$SUBDIRECTORY_OK" ]
 139         then
 140                 test -z "$(git rev-parse --show-cdup)" || {
 141                         exit=$?
 142                         echo >&2 "You need to run this command from the toplevel of the working tree."
 143                         exit $exit
 144                 }
 145         fi
 146         test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
 147                 echo >&2 "Unable to determine absolute path of git directory"
 148                 exit 1
 149         }
 150         : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 151 fi
 152
 153 # Fix some commands on Windows
 154 case $(uname -s) in
 155 *MINGW*)
 156         # Windows has its own (incompatible) sort and find
 157         sort () {
 158                 /usr/bin/sort "$@"
 159         }
 160         find () {
 161                 /usr/bin/find "$@"
 162         }
 163         ;;
 164 esac