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git/git-prune-script
Junio C Hamano 8ac069ac0a Introduce GIT_DIR environment variable.
During the mailing list discussion on renaming GIT_ environment
variables, people felt that having one environment that lets the
user (or Porcelain) specify both SHA1_FILE_DIRECTORY (now
GIT_OBJECT_DIRECTORY) and GIT_INDEX_FILE for the default layout
would be handy.  This change introduces GIT_DIR environment
variable, from which the defaults for GIT_INDEX_FILE and
GIT_OBJECT_DIRECTORY are derived.  When GIT_DIR is not defined,
it defaults to ".git".  GIT_INDEX_FILE defaults to
"$GIT_DIR/index" and GIT_OBJECT_DIRECTORY defaults to
"$GIT_DIR/objects".

Special thanks for ideas and discussions go to Petr Baudis and
Daniel Barkalow.  Bugs are mine ;-)

Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-05-09 22:57:58 -07:00

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#!/bin/sh
dryrun=
while case "$#" in 0) break ;; esac
do
case "$1" in
-n) dryrun=echo ;;
--) break ;;
-*) echo >&2 "usage: git-prune-script [ -n ] [ heads... ]"; exit 1 ;;
*) break ;;
esac
shift;
done
: ${GIT_DIR=.git}
: ${GIT_OBJECT_DIRECTORY="${SHA1_FILE_DIRECTORY-"$GIT_DIR/objects"}"}
# Defaulting to include .git/refs/*/* may be debatable from the
# purist POV but power users can always give explicit parameters
# to the script anyway.
case "$#" in
0)
x_40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
x_40="$x_40$x_40$x_40$x_40$x_40$x_40$x_40$x_40"
set x $(sed -ne "/^$x_40\$/p" \
"$GIT_DIR"/HEAD "$GIT_DIR"/refs/*/* /dev/null 2>/dev/null)
shift ;;
esac
git-fsck-cache --cache --unreachable "$@" |
sed -ne '/unreachable /{
s/unreachable [^ ][^ ]* //
s|\(..\)|\1/|p
}' | {
cd "$GIT_OBJECT_DIRECTORY" || exit
xargs -r $dryrun rm -f
}