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https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
This subcommand creates a stash from the current state and writes out the resulting commit object ID to the standard output, without updating the stash ref nor resetting the tree. It is intended to be used by scripts to temporarily rewind the working tree to a clean state. Signed-off-by: Junio C Hamano <gitster@pobox.com>
230 lines
4.6 KiB
Bash
Executable file
230 lines
4.6 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (c) 2007, Nanako Shiraishi
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USAGE='[ | list | show | apply | clear]'
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SUBDIRECTORY_OK=Yes
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. git-sh-setup
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require_work_tree
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cd_to_toplevel
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TMP="$GIT_DIR/.git-stash.$$"
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trap 'rm -f "$TMP-*"' 0
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ref_stash=refs/stash
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no_changes () {
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git diff-index --quiet --cached HEAD &&
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git diff-files --quiet
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}
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clear_stash () {
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if current=$(git rev-parse --verify $ref_stash 2>/dev/null)
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then
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git update-ref -d refs/stash $current
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fi
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}
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create_stash () {
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stash_msg="$1"
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if no_changes
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then
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exit 0
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fi
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# state of the base commit
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if b_commit=$(git rev-parse --verify HEAD)
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then
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head=$(git log --abbrev-commit --pretty=oneline -n 1 HEAD)
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else
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die "You do not have the initial commit yet"
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fi
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if branch=$(git symbolic-ref -q HEAD)
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then
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branch=${branch#refs/heads/}
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else
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branch='(no branch)'
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fi
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msg=$(printf '%s: %s' "$branch" "$head")
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# state of the index
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i_tree=$(git write-tree) &&
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i_commit=$(printf 'index on %s\n' "$msg" |
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git commit-tree $i_tree -p $b_commit) ||
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die "Cannot save the current index state"
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# state of the working tree
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w_tree=$( (
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rm -f "$TMP-index" &&
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cp -p ${GIT_INDEX_FILE-"$GIT_DIR/index"} "$TMP-index" &&
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GIT_INDEX_FILE="$TMP-index" &&
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export GIT_INDEX_FILE &&
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git read-tree -m $i_tree &&
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git add -u &&
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git write-tree &&
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rm -f "$TMP-index"
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) ) ||
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die "Cannot save the current worktree state"
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# create the stash
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if test -z "$stash_msg"
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then
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stash_msg=$(printf 'WIP on %s' "$msg")
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else
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stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
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fi
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w_commit=$(printf '%s\n' "$stash_msg" |
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git commit-tree $w_tree -p $b_commit -p $i_commit) ||
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die "Cannot record working tree state"
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}
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save_stash () {
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stash_msg="$1"
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if no_changes
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then
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echo >&2 'No local changes to save'
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exit 0
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fi
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test -f "$GIT_DIR/logs/$ref_stash" ||
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clear_stash || die "Cannot initialize stash"
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create_stash "$stash_msg"
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git update-ref -m "$stash_msg" $ref_stash $w_commit ||
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die "Cannot save the current status"
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printf >&2 'Saved "%s"\n' "$stash_msg"
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}
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have_stash () {
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git rev-parse --verify $ref_stash >/dev/null 2>&1
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}
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list_stash () {
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have_stash || return 0
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git log --pretty=oneline -g "$@" $ref_stash |
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sed -n -e 's/^[.0-9a-f]* refs\///p'
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}
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show_stash () {
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flags=$(git rev-parse --no-revs --flags "$@")
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if test -z "$flags"
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then
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flags=--stat
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fi
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s=$(git rev-parse --revs-only --no-flags --default $ref_stash "$@")
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w_commit=$(git rev-parse --verify "$s") &&
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b_commit=$(git rev-parse --verify "$s^") &&
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git diff $flags $b_commit $w_commit
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}
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apply_stash () {
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git diff-files --quiet ||
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die 'Cannot restore on top of a dirty state'
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unstash_index=
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case "$1" in
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--index)
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unstash_index=t
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shift
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esac
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# current index state
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c_tree=$(git write-tree) ||
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die 'Cannot apply a stash in the middle of a merge'
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# stash records the work tree, and is a merge between the
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# base commit (first parent) and the index tree (second parent).
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s=$(git rev-parse --revs-only --no-flags --default $ref_stash "$@") &&
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w_tree=$(git rev-parse --verify "$s:") &&
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b_tree=$(git rev-parse --verify "$s^1:") &&
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i_tree=$(git rev-parse --verify "$s^2:") ||
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die "$*: no valid stashed state found"
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unstashed_index_tree=
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if test -n "$unstash_index" && test "$b_tree" != "$i_tree"
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then
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git diff --binary $s^2^..$s^2 | git apply --cached
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test $? -ne 0 &&
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die 'Conflicts in index. Try without --index.'
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unstashed_index_tree=$(git-write-tree) ||
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die 'Could not save index tree'
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git reset
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fi
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eval "
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GITHEAD_$w_tree='Stashed changes' &&
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GITHEAD_$c_tree='Updated upstream' &&
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GITHEAD_$b_tree='Version stash was based on' &&
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export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
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"
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if git-merge-recursive $b_tree -- $c_tree $w_tree
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then
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# No conflict
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if test -n "$unstashed_index_tree"
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then
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git read-tree "$unstashed_index_tree"
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else
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a="$TMP-added" &&
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git diff --cached --name-only --diff-filter=A $c_tree >"$a" &&
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git read-tree --reset $c_tree &&
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git update-index --add --stdin <"$a" ||
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die "Cannot unstage modified files"
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rm -f "$a"
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fi
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git status || :
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else
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# Merge conflict; keep the exit status from merge-recursive
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status=$?
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if test -n "$unstash_index"
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then
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echo >&2 'Index was not unstashed.'
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fi
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exit $status
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fi
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}
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# Main command set
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case "$1" in
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list)
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shift
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if test $# = 0
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then
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set x -n 10
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shift
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fi
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list_stash "$@"
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;;
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show)
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shift
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show_stash "$@"
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;;
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apply)
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shift
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apply_stash "$@"
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;;
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clear)
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clear_stash
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;;
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create)
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if test $# -gt 0 && test "$1" = create
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then
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shift
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fi
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create_stash "$*" && echo "$w_commit"
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;;
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help | usage)
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usage
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;;
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*)
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if test $# -gt 0 && test "$1" = save
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then
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shift
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fi
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save_stash "$*" && git-reset --hard
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;;
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esac
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