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executable file 505 lines (436 sloc) 10.537 kb
#!/bin/sh
# Copyright (c) 2007, Nanako Shiraishi
dashless=$(basename "$0" | sed -e 's/-/ /')
USAGE="list [<options>]
or: $dashless show [<stash>]
or: $dashless drop [-q|--quiet] [<stash>]
or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
or: $dashless branch <branchname> [<stash>]
or: $dashless [save [--patch] [-k|--[no-]keep-index] [-q|--quiet] [<message>]]
or: $dashless clear"
SUBDIRECTORY_OK=Yes
OPTIONS_SPEC=
START_DIR=`pwd`
. git-sh-setup
require_work_tree
cd_to_toplevel
TMP="$GIT_DIR/.git-stash.$$"
TMPindex=${GIT_INDEX_FILE-"$GIT_DIR/index"}.stash.$$
trap 'rm -f "$TMP-"* "$TMPindex"' 0
ref_stash=refs/stash
if git config --get-colorbool color.interactive; then
help_color="$(git config --get-color color.interactive.help 'red bold')"
reset_color="$(git config --get-color '' reset)"
else
help_color=
reset_color=
fi
no_changes () {
git diff-index --quiet --cached HEAD --ignore-submodules -- &&
git diff-files --quiet --ignore-submodules
}
clear_stash () {
if test $# != 0
then
die "git stash clear with parameters is unimplemented"
fi
if current=$(git rev-parse --verify $ref_stash 2>/dev/null)
then
git update-ref -d $ref_stash $current
fi
}
create_stash () {
stash_msg="$1"
git update-index -q --refresh
if no_changes
then
exit 0
fi
# state of the base commit
if b_commit=$(git rev-parse --verify HEAD)
then
head=$(git rev-list --oneline -n 1 HEAD --)
else
die "You do not have the initial commit yet"
fi
if branch=$(git symbolic-ref -q HEAD)
then
branch=${branch#refs/heads/}
else
branch='(no branch)'
fi
msg=$(printf '%s: %s' "$branch" "$head")
# state of the index
i_tree=$(git write-tree) &&
i_commit=$(printf 'index on %s\n' "$msg" |
git commit-tree $i_tree -p $b_commit) ||
die "Cannot save the current index state"
if test -z "$patch_mode"
then
# state of the working tree
w_tree=$( (
git read-tree --index-output="$TMPindex" -m $i_tree &&
GIT_INDEX_FILE="$TMPindex" &&
export GIT_INDEX_FILE &&
git diff --name-only -z HEAD | git update-index -z --add --remove --stdin &&
git write-tree &&
rm -f "$TMPindex"
) ) ||
die "Cannot save the current worktree state"
else
rm -f "$TMP-index" &&
GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
# find out what the user wants
GIT_INDEX_FILE="$TMP-index" \
git add--interactive --patch=stash -- &&
# state of the working tree
w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
die "Cannot save the current worktree state"
git diff-tree -p HEAD $w_tree > "$TMP-patch" &&
test -s "$TMP-patch" ||
die "No changes selected"
rm -f "$TMP-index" ||
die "Cannot remove temporary index (can't happen)"
fi
# create the stash
if test -z "$stash_msg"
then
stash_msg=$(printf 'WIP on %s' "$msg")
else
stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
fi
w_commit=$(printf '%s\n' "$stash_msg" |
git commit-tree $w_tree -p $b_commit -p $i_commit) ||
die "Cannot record working tree state"
}
save_stash () {
keep_index=
patch_mode=
while test $# != 0
do
case "$1" in
-k|--keep-index)
keep_index=t
;;
--no-keep-index)
keep_index=
;;
-p|--patch)
patch_mode=t
keep_index=t
;;
-q|--quiet)
GIT_QUIET=t
;;
--)
shift
break
;;
-*)
echo "error: unknown option for 'stash save': $1"
echo " To provide a message, use git stash save -- '$1'"
usage
;;
*)
break
;;
esac
shift
done
stash_msg="$*"
git update-index -q --refresh
if no_changes
then
say 'No local changes to save'
exit 0
fi
test -f "$GIT_DIR/logs/$ref_stash" ||
clear_stash || die "Cannot initialize stash"
create_stash "$stash_msg"
# Make sure the reflog for stash is kept.
: >>"$GIT_DIR/logs/$ref_stash"
git update-ref -m "$stash_msg" $ref_stash $w_commit ||
die "Cannot save the current status"
say Saved working directory and index state "$stash_msg"
if test -z "$patch_mode"
then
git reset --hard ${GIT_QUIET:+-q}
if test -n "$keep_index" && test -n $i_tree
then
git read-tree --reset -u $i_tree
fi
else
git apply -R < "$TMP-patch" ||
die "Cannot remove worktree changes"
if test -z "$keep_index"
then
git reset
fi
fi
}
have_stash () {
git rev-parse --verify $ref_stash >/dev/null 2>&1
}
list_stash () {
have_stash || return 0
git log --format="%gd: %gs" -g "$@" $ref_stash --
}
show_stash () {
assert_stash_like "$@"
git diff ${FLAGS:---stat} $b_commit $w_commit
}
#
# Parses the remaining options looking for flags and
# at most one revision defaulting to ${ref_stash}@{0}
# if none found.
#
# Derives related tree and commit objects from the
# revision, if one is found.
#
# stash records the work tree, and is a merge between the
# base commit (first parent) and the index tree (second parent).
#
# REV is set to the symbolic version of the specified stash-like commit
# IS_STASH_LIKE is non-blank if ${REV} looks like a stash
# IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
# s is set to the SHA1 of the stash commit
# w_commit is set to the commit containing the working tree
# b_commit is set to the base commit
# i_commit is set to the commit containing the index tree
# w_tree is set to the working tree
# b_tree is set to the base tree
# i_tree is set to the index tree
#
# GIT_QUIET is set to t if -q is specified
# INDEX_OPTION is set to --index if --index is specified.
# FLAGS is set to the remaining flags
#
# dies if:
# * too many revisions specified
# * no revision is specified and there is no stash stack
# * a revision is specified which cannot be resolve to a SHA1
# * a non-existent stash reference is specified
#
parse_flags_and_rev()
{
test "$PARSE_CACHE" = "$*" && return 0 # optimisation
PARSE_CACHE="$*"
IS_STASH_LIKE=
IS_STASH_REF=
INDEX_OPTION=
s=
w_commit=
b_commit=
i_commit=
w_tree=
b_tree=
i_tree=
REV=$(git rev-parse --no-flags --symbolic "$@" 2>/dev/null)
FLAGS=
for opt
do
case "$opt" in
-q|--quiet)
GIT_QUIET=-t
;;
--index)
INDEX_OPTION=--index
;;
-*)
FLAGS="${FLAGS}${FLAGS:+ }$opt"
;;
esac
done
set -- $REV
case $# in
0)
have_stash || die "No stash found."
set -- ${ref_stash}@{0}
;;
1)
:
;;
*)
die "Too many revisions specified: $REV"
;;
esac
REV=$(git rev-parse --quiet --symbolic --verify $1 2>/dev/null) || die "$1 is not valid reference"
i_commit=$(git rev-parse --quiet --verify $REV^2 2>/dev/null) &&
set -- $(git rev-parse $REV $REV^1 $REV: $REV^1: $REV^2: 2>/dev/null) &&
s=$1 &&
w_commit=$1 &&
b_commit=$2 &&
w_tree=$3 &&
b_tree=$4 &&
i_tree=$5 &&
IS_STASH_LIKE=t &&
test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
IS_STASH_REF=t
if test "${REV}" != "${REV%{*\}}"
then
# maintainers: it would be better if git rev-parse indicated
# this condition with a non-zero status code but as of 1.7.2.1 it
# it did not. So, we use non-empty stderr output as a proxy for the
# condition of interest.
test -z "$(git rev-parse "$REV" 2>&1 >/dev/null)" || die "$REV does not exist in the stash log"
fi
}
is_stash_like()
{
parse_flags_and_rev "$@"
test -n "$IS_STASH_LIKE"
}
assert_stash_like() {
is_stash_like "$@" || die "'$*' is not a stash-like commit"
}
is_stash_ref() {
is_stash_like "$@" && test -n "$IS_STASH_REF"
}
assert_stash_ref() {
is_stash_ref "$@" || die "'$*' is not a stash reference"
}
apply_stash () {
assert_stash_like "$@"
git update-index -q --refresh &&
git diff-files --quiet --ignore-submodules ||
die 'Cannot apply to a dirty working tree, please stage your changes'
# current index state
c_tree=$(git write-tree) ||
die 'Cannot apply a stash in the middle of a merge'
unstashed_index_tree=
if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
test "$c_tree" != "$i_tree"
then
git diff-tree --binary $s^2^..$s^2 | git apply --cached
test $? -ne 0 &&
die 'Conflicts in index. Try without --index.'
unstashed_index_tree=$(git write-tree) ||
die 'Could not save index tree'
git reset
fi
eval "
GITHEAD_$w_tree='Stashed changes' &&
GITHEAD_$c_tree='Updated upstream' &&
GITHEAD_$b_tree='Version stash was based on' &&
export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
"
if test -n "$GIT_QUIET"
then
GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
fi
if git merge-recursive $b_tree -- $c_tree $w_tree
then
# No conflict
if test -n "$unstashed_index_tree"
then
git read-tree "$unstashed_index_tree"
else
a="$TMP-added" &&
git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
git read-tree --reset $c_tree &&
git update-index --add --stdin <"$a" ||
die "Cannot unstage modified files"
rm -f "$a"
fi
squelch=
if test -n "$GIT_QUIET"
then
squelch='>/dev/null 2>&1'
fi
(cd "$START_DIR" && eval "git status $squelch") || :
else
# Merge conflict; keep the exit status from merge-recursive
status=$?
if test -n "$INDEX_OPTION"
then
echo >&2 'Index was not unstashed.'
fi
exit $status
fi
}
pop_stash() {
assert_stash_ref "$@"
apply_stash "$@" &&
drop_stash "$@"
}
drop_stash () {
assert_stash_ref "$@"
git reflog delete --updateref --rewrite "${REV}" &&
say "Dropped ${REV} ($s)" || die "${REV}: Could not drop stash entry"
# clear_stash if we just dropped the last stash entry
git rev-parse --verify "$ref_stash@{0}" > /dev/null 2>&1 || clear_stash
}
apply_to_branch () {
test -n "$1" || die 'No branch name specified'
branch=$1
shift 1
set -- --index "$@"
assert_stash_like "$@"
git checkout -b $branch $REV^ &&
apply_stash "$@" && {
test -z "$IS_STASH_REF" || drop_stash "$@"
}
}
PARSE_CACHE='--not-parsed'
# The default command is "save" if nothing but options are given
seen_non_option=
for opt
do
case "$opt" in
-*) ;;
*) seen_non_option=t; break ;;
esac
done
test -n "$seen_non_option" || set "save" "$@"
# Main command set
case "$1" in
list)
shift
list_stash "$@"
;;
show)
shift
show_stash "$@"
;;
save)
shift
save_stash "$@"
;;
apply)
shift
apply_stash "$@"
;;
clear)
shift
clear_stash "$@"
;;
create)
if test $# -gt 0 && test "$1" = create
then
shift
fi
create_stash "$*" && echo "$w_commit"
;;
drop)
shift
drop_stash "$@"
;;
pop)
shift
pop_stash "$@"
;;
branch)
shift
apply_to_branch "$@"
;;
*)
case $# in
0)
save_stash &&
say '(To restore them type "git stash apply")'
;;
*)
usage
esac
;;
esac
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