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#!/bin/sh
#
# This is included in commands that either have to be run from the toplevel
# of the repository, or with GIT_DIR environment variable properly.
# If the GIT_DIR does not look like the right correct git-repository,
# it dies.

# Having this variable in your environment would break scripts because
# you would cause "cd" to be taken to unexpected places. If you
# like CDPATH, define it for your interactive shell sessions without
# exporting it.
unset CDPATH

die() {
echo >&2 "$@"
exit 1
}

if test -n "$OPTIONS_SPEC"; then
usage() {
"$0" -h
exit 1
}

parseopt_extra=
[ -n "$OPTIONS_KEEPDASHDASH" ] &&
parseopt_extra="--keep-dashdash"

eval "$(
echo "$OPTIONS_SPEC" |
git rev-parse --parseopt $parseopt_extra -- "$@" ||
echo exit $?
)"
else
dashless=$(basename "$0" | sed -e 's/-/ /')
usage() {
die "Usage: $dashless $USAGE"
}

if [ -z "$LONG_USAGE" ]
then
LONG_USAGE="Usage: $dashless $USAGE"
else
LONG_USAGE="Usage: $dashless $USAGE

$LONG_USAGE"
fi

case "$1" in
-h|--h|--he|--hel|--help)
echo "$LONG_USAGE"
exit
esac
fi

set_reflog_action() {
if [ -z "${GIT_REFLOG_ACTION:+set}" ]
then
GIT_REFLOG_ACTION="$*"
export GIT_REFLOG_ACTION
fi
}

git_editor() {
: "${GIT_EDITOR:=$(git config core.editor)}"
: "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
case "$GIT_EDITOR,$TERM" in
,dumb)
echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
echo >&2 "Please set one of these variables to an appropriate"
echo >&2 "editor or run $0 with options that will not cause an"
echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
exit 1
;;
esac
eval "${GIT_EDITOR:=vi}" '"$@"'
}

is_bare_repository () {
git rev-parse --is-bare-repository
}

cd_to_toplevel () {
cdup=$(git rev-parse --show-cdup)
if test ! -z "$cdup"
then
# The "-P" option says to follow "physical" directory
# structure instead of following symbolic links. When cdup is
# "../", this means following the ".." entry in the current
# directory instead textually removing a symlink path element
# from the PWD shell variable. The "-P" behavior is more
# consistent with the C-style chdir used by most of Git.
cd -P "$cdup" || {
echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
exit 1
}
fi
}

require_work_tree () {
test $(git rev-parse --is-inside-work-tree) = true ||
die "fatal: $0 cannot be used without a working tree."
}

get_author_ident_from_commit () {
pick_author_script='
/^author /{
s/'\''/'\''\\'\'\''/g
h
s/^author \([^<]*\) <[^>]*> .*$/\1/
s/'\''/'\''\'\'\''/g
s/.*/GIT_AUTHOR_NAME='\''&'\''/p

g
s/^author [^<]* <\([^>]*\)> .*$/\1/
s/'\''/'\''\'\'\''/g
s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p

g
s/^author [^<]* <[^>]*> \(.*\)$/\1/
s/'\''/'\''\'\'\''/g
s/.*/GIT_AUTHOR_DATE='\''&'\''/p

q
}
'
encoding=$(git config i18n.commitencoding || echo UTF-8)
git show -s --pretty=raw --encoding="$encoding" "$1" -- |
LANG=C LC_ALL=C sed -ne "$pick_author_script"
}

# Make sure we are in a valid repository of a vintage we understand,
# if we require to be in a git repository.
if test -z "$NONGIT_OK"
then
GIT_DIR=$(git rev-parse --git-dir) || exit
if [ -z "$SUBDIRECTORY_OK" ]
then
test -z "$(git rev-parse --show-cdup)" || {
exit=$?
echo >&2 "You need to run this command from the toplevel of the working tree."
exit $exit
}
fi
test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
echo >&2 "Unable to determine absolute path of git directory"
exit 1
}
: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
fi

# Fix some commands on Windows
case $(uname -s) in
*MINGW*)
# Windows has its own (incompatible) sort and find
sort () {
/usr/bin/sort "$@"
}
find () {
/usr/bin/find "$@"
}
;;
esac
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