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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

git_broken_path_fix () {
case ":$PATH:" in
*:$1:*) : ok ;;
*)
PATH=$(
SANE_TOOL_PATH="$1"
IFS=: path= sep=
set x $PATH
shift
for elem
do
case "$SANE_TOOL_PATH:$elem" in
(?*:/bin | ?*:/usr/bin)
path="$path$sep$SANE_TOOL_PATH"
sep=:
SANE_TOOL_PATH=
esac
path="$path$sep$elem"
sep=:
done
echo "$path"
)
;;
esac
}

# @@BROKEN_PATH_FIX@@

die () {
die_with_status 1 "$@"
}

die_with_status () {
status=$1
shift
echo >&2 "$*"
exit "$status"
}

GIT_QUIET=

say () {
if test -z "$GIT_QUIET"
then
printf '%s\n' "$*"
fi
}

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() {
if test -z "${GIT_EDITOR:+set}"
then
GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
fi

eval "$GIT_EDITOR" '"$@"'
}

git_pager() {
if test -t 1
then
GIT_PAGER=$(git var GIT_PAGER)
else
GIT_PAGER=cat
fi
: ${LESS=-FRSX}
export LESS

eval "$GIT_PAGER" '"$@"'
}

sane_grep () {
GREP_OPTIONS= LC_ALL=C grep "$@"
}

sane_egrep () {
GREP_OPTIONS= LC_ALL=C egrep "$@"
}

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

cd_to_toplevel () {
cdup=$(git rev-parse --show-toplevel) &&
cd "$cdup" || {
echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
exit 1
}
}

require_work_tree_exists () {
if test "z$(git rev-parse --is-bare-repository)" != zfalse
then
die "fatal: $0 cannot be used without a working tree."
fi
}

require_work_tree () {
test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
die "fatal: $0 cannot be used without a working tree."
}

require_clean_work_tree () {
git rev-parse --verify HEAD >/dev/null || exit 1
git update-index -q --ignore-submodules --refresh
err=0

if ! git diff-files --quiet --ignore-submodules
then
echo >&2 "Cannot $1: You have unstaged changes."
err=1
fi

if ! git diff-index --cached --quiet --ignore-submodules HEAD --
then
if [ $err = 0 ]
then
echo >&2 "Cannot $1: Your index contains uncommitted changes."
else
echo >&2 "Additionally, your index contains uncommitted changes."
fi
err=1
fi

if [ $err = 1 ]
then
test -n "$2" && echo >&2 "$2"
exit 1
fi
}

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

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

g
s/^author [^<]* <[^>]*> \(.*\)$/\1/
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"
}

# Clear repo-local GIT_* environment variables. Useful when switching to
# another repository (e.g. when entering a submodule). See also the env
# list in git_connect()
clear_local_git_env() {
unset $(git rev-parse --local-env-vars)
}

# 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 "$@"
}
is_absolute_path () {
case "$1" in
[/\\]* | [A-Za-z]:*)
return 0 ;;
esac
return 1
}
;;
*)
is_absolute_path () {
case "$1" in
/*)
return 0 ;;
esac
return 1
}
esac
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