#!/bin/sh # Copyright (c) 2007, Nanako Shiraishi dashless=$(basename "$0" | sed -e 's/-/ /') USAGE="list [] or: $dashless show [] or: $dashless drop [-q|--quiet] [] or: $dashless ( pop | apply ) [--index] [-q|--quiet] [] or: $dashless branch [] or: $dashless [save [--patch] [-k|--[no-]keep-index] [-q|--quiet] []] or: $dashless clear" SUBDIRECTORY_OK=Yes OPTIONS_SPEC= . git-sh-setup require_work_tree cd_to_toplevel TMP="$GIT_DIR/.git-stash.$$" trap 'rm -f "$TMP-*"' 0 ref_stash=refs/stash if git config --get-colorbool color.interactive; then help_color="$(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=$( ( rm -f "$TMP-index" && cp -p ${GIT_INDEX_FILE-"$GIT_DIR/index"} "$TMP-index" && GIT_INDEX_FILE="$TMP-index" && export GIT_INDEX_FILE && git read-tree -m $i_tree && git diff --name-only -z HEAD | git update-index -z --add --remove --stdin && git write-tree && rm -f "$TMP-index" ) ) || 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= # Work around rev-parse --flags eating -q for opt do case "$opt" in -q|--quiet) GIT_QUIET=t ;; esac done REV=$(git rev-parse --no-flags --symbolic "$@" 2>/dev/null) FLAGS=$(git rev-parse --no-revs --flags "$@" 2>/dev/null) set -- $FLAGS FLAGS= while test $# -ne 0 do case "$1" in --index) INDEX_OPTION=--index ;; --) : ;; *) FLAGS="${FLAGS}${FLAGS:+ }$1" ;; esac shift 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 export GIT_MERGE_VERBOSITY=0 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 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