#!/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() {
        echo >&2 "$@"
        exit 1
}

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() {
        : "${GIT_EDITOR:=$(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}" '"$@"'
}

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=$(git rev-parse --show-cdup)
        if test ! -z "$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