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