2007-06-30 05:37:09 +00:00
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#!/bin/sh
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# Copyright (c) 2007, Nanako Shiraishi
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USAGE='[ | list | show | apply | clear]'
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. git-sh-setup
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require_work_tree
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TMP="$GIT_DIR/.git-stash.$$"
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trap 'rm -f "$TMP-*"' 0
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ref_stash=refs/stash
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no_changes () {
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2007-07-03 05:52:14 +00:00
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git diff-index --quiet --cached HEAD &&
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git diff-files --quiet
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2007-06-30 05:37:09 +00:00
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}
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clear_stash () {
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logfile="$GIT_DIR/logs/$ref_stash" &&
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mkdir -p "$(dirname "$logfile")" &&
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: >"$logfile"
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}
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save_stash () {
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2007-07-05 05:46:09 +00:00
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stash_msg="$1"
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2007-06-30 05:37:09 +00:00
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if no_changes
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then
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echo >&2 'No local changes to save'
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exit 0
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fi
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test -f "$GIT_DIR/logs/$ref_stash" ||
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clear_stash || die "Cannot initialize stash"
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# state of the base commit
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2007-07-03 05:52:14 +00:00
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if b_commit=$(git rev-parse --verify HEAD)
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2007-06-30 05:37:09 +00:00
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then
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2007-07-03 05:52:14 +00:00
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head=$(git log --abbrev-commit --pretty=oneline -n 1 HEAD)
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2007-06-30 05:37:09 +00:00
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else
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die "You do not have the initial commit yet"
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fi
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2007-07-03 05:52:14 +00:00
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if branch=$(git symbolic-ref -q HEAD)
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2007-06-30 05:37:09 +00:00
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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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2007-07-03 05:52:14 +00:00
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i_tree=$(git write-tree) &&
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2007-06-30 05:37:09 +00:00
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i_commit=$(printf 'index on %s' "$msg" |
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2007-07-03 05:52:14 +00:00
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git commit-tree $i_tree -p $b_commit) ||
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2007-06-30 05:37:09 +00:00
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die "Cannot save the current index state"
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# state of the working tree
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w_tree=$( (
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GIT_INDEX_FILE="$TMP-index" &&
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export GIT_INDEX_FILE &&
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rm -f "$TMP-index" &&
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2007-07-03 05:52:14 +00:00
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git read-tree $i_tree &&
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git add -u &&
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git write-tree &&
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2007-06-30 05:37:09 +00:00
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rm -f "$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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2007-07-05 05:46:09 +00:00
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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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2007-07-03 05:52:14 +00:00
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git commit-tree $w_tree -p $b_commit -p $i_commit) ||
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2007-06-30 05:37:09 +00:00
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die "Cannot record working tree state"
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2007-07-05 05:46:09 +00:00
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git update-ref -m "$stash_msg" $ref_stash $w_commit ||
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2007-06-30 05:37:09 +00:00
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die "Cannot save the current status"
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2007-07-05 05:46:09 +00:00
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printf >&2 'Saved "%s"\n' "$stash_msg"
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2007-06-30 05:37:09 +00:00
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}
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2007-07-02 04:21:24 +00:00
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have_stash () {
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2007-07-03 05:52:14 +00:00
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git rev-parse --verify $ref_stash >/dev/null 2>&1
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2007-07-02 04:21:24 +00:00
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}
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2007-06-30 05:37:09 +00:00
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list_stash () {
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2007-07-02 04:21:24 +00:00
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have_stash || return 0
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2007-07-03 05:52:14 +00:00
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git log --pretty=oneline -g "$@" $ref_stash |
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2007-06-30 05:37:09 +00:00
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sed -n -e 's/^[.0-9a-f]* refs\///p'
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}
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show_stash () {
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2007-07-03 05:52:14 +00:00
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flags=$(git rev-parse --no-revs --flags "$@")
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2007-06-30 05:37:09 +00:00
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if test -z "$flags"
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then
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flags=--stat
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fi
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2007-07-03 05:52:14 +00:00
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s=$(git rev-parse --revs-only --no-flags --default $ref_stash "$@")
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2007-06-30 05:37:09 +00:00
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2007-07-03 05:52:14 +00:00
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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 $w_commit
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2007-06-30 05:37:09 +00:00
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}
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apply_stash () {
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2007-07-03 05:52:14 +00:00
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git diff-files --quiet ||
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2007-06-30 05:37:09 +00:00
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die 'Cannot restore on top of a dirty state'
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# current index state
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2007-07-03 05:52:14 +00:00
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c_tree=$(git write-tree) ||
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2007-06-30 05:37:09 +00:00
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die 'Cannot apply a stash in the middle of a merge'
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2007-07-03 05:52:14 +00:00
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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^:") ||
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2007-06-30 05:37:09 +00:00
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die "$*: no valid stashed state found"
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eval "
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GITHEAD_$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 $w_tree
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then
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# No conflict
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a="$TMP-added" &&
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2007-07-03 05:52:14 +00:00
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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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2007-06-30 05:37:09 +00:00
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die "Cannot unstage modified files"
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git-status
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rm -f "$a"
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else
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# Merge conflict; keep the exit status from merge-recursive
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exit
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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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2007-07-03 06:15:45 +00:00
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list)
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shift
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2007-06-30 05:37:09 +00:00
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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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2007-07-05 05:46:09 +00:00
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help | usage)
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usage
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2007-06-30 05:37:09 +00:00
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;;
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*)
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2007-07-05 05:46:09 +00:00
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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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2007-06-30 05:37:09 +00:00
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esac
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