mirror of
https://github.com/git/git.git
synced 2024-11-25 02:44:48 +08:00
fb433dc912
This patch teaches git stash branch to tolerate stash-like arguments. In particular, a stash is only required if an argument isn't specified and the stash is only dropped if a stash entry reference was specified or implied. The implementation has been simplified by taking advantage of assert_stash_like() and the variables established by parse_flags_and_rev(). Signed-off-by: Jon Seymour <jon.seymour@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
522 lines
11 KiB
Bash
Executable File
522 lines
11 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (c) 2007, Nanako Shiraishi
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dashless=$(basename "$0" | sed -e 's/-/ /')
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USAGE="list [<options>]
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or: $dashless show [<stash>]
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or: $dashless drop [-q|--quiet] [<stash>]
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or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
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or: $dashless branch <branchname> [<stash>]
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or: $dashless [save [--patch] [-k|--[no-]keep-index] [-q|--quiet] [<message>]]
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or: $dashless clear"
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SUBDIRECTORY_OK=Yes
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OPTIONS_SPEC=
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. git-sh-setup
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require_work_tree
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cd_to_toplevel
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TMP="$GIT_DIR/.git-stash.$$"
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trap 'rm -f "$TMP-*"' 0
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ref_stash=refs/stash
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if git config --get-colorbool color.interactive; then
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help_color="$(git config --get-color color.interactive.help 'red bold')"
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reset_color="$(git config --get-color '' reset)"
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else
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help_color=
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reset_color=
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fi
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no_changes () {
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git diff-index --quiet --cached HEAD --ignore-submodules -- &&
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git diff-files --quiet --ignore-submodules
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}
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clear_stash () {
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if test $# != 0
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then
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die "git stash clear with parameters is unimplemented"
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fi
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if current=$(git rev-parse --verify $ref_stash 2>/dev/null)
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then
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git update-ref -d $ref_stash $current
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fi
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}
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create_stash () {
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stash_msg="$1"
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git update-index -q --refresh
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if no_changes
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then
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exit 0
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fi
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# state of the base commit
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if b_commit=$(git rev-parse --verify HEAD)
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then
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head=$(git rev-list --oneline -n 1 HEAD --)
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else
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die "You do not have the initial commit yet"
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fi
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if branch=$(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 $b_commit) ||
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die "Cannot save the current index state"
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if test -z "$patch_mode"
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then
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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 $i_tree &&
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git diff --name-only -z HEAD | git update-index -z --add --remove --stdin &&
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git write-tree &&
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rm -f "$TMP-index"
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) ) ||
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die "Cannot save the current worktree state"
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else
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rm -f "$TMP-index" &&
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GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
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# find out what the user wants
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GIT_INDEX_FILE="$TMP-index" \
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git add--interactive --patch=stash -- &&
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# state of the working tree
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w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
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die "Cannot save the current worktree state"
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git diff-tree -p HEAD $w_tree > "$TMP-patch" &&
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test -s "$TMP-patch" ||
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die "No changes selected"
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rm -f "$TMP-index" ||
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die "Cannot remove temporary index (can't happen)"
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fi
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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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keep_index=
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patch_mode=
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while test $# != 0
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do
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case "$1" in
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-k|--keep-index)
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keep_index=t
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;;
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--no-keep-index)
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keep_index=
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;;
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-p|--patch)
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patch_mode=t
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keep_index=t
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;;
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-q|--quiet)
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GIT_QUIET=t
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;;
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--)
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shift
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break
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;;
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-*)
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echo "error: unknown option for 'stash save': $1"
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echo " To provide a message, use git stash save -- '$1'"
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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stash_msg="$*"
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git update-index -q --refresh
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if no_changes
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then
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say '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 "$stash_msg"
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# Make sure the reflog for stash is kept.
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: >>"$GIT_DIR/logs/$ref_stash"
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git update-ref -m "$stash_msg" $ref_stash $w_commit ||
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die "Cannot save the current status"
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say Saved working directory and index state "$stash_msg"
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if test -z "$patch_mode"
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then
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git reset --hard ${GIT_QUIET:+-q}
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if test -n "$keep_index" && test -n $i_tree
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then
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git read-tree --reset -u $i_tree
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fi
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else
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git apply -R < "$TMP-patch" ||
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die "Cannot remove worktree changes"
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if test -z "$keep_index"
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then
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git reset
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fi
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fi
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}
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have_stash () {
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git rev-parse --verify $ref_stash >/dev/null 2>&1
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}
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list_stash () {
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have_stash || return 0
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git log --format="%gd: %gs" -g "$@" $ref_stash --
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}
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show_stash () {
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have_stash || die 'No stash found'
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flags=$(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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w_commit=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
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b_commit=$(git rev-parse --quiet --verify "$w_commit^") ||
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die "'$*' is not a stash"
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git diff $flags $b_commit $w_commit
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}
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#
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# Parses the remaining options looking for flags and
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# at most one revision defaulting to ${ref_stash}@{0}
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# if none found.
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#
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# Derives related tree and commit objects from the
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# revision, if one is found.
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#
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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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#
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# REV is set to the symbolic version of the specified stash-like commit
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# IS_STASH_LIKE is non-blank if ${REV} looks like a stash
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# IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
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# s is set to the SHA1 of the stash commit
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# w_commit is set to the commit containing the working tree
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# b_commit is set to the base commit
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# i_commit is set to the commit containing the index tree
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# w_tree is set to the working tree
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# b_tree is set to the base tree
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# i_tree is set to the index tree
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#
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# GIT_QUIET is set to t if -q is specified
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# INDEX_OPTION is set to --index if --index is specified.
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# FLAGS is set to the remaining flags
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#
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# dies if:
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# * too many revisions specified
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# * no revision is specified and there is no stash stack
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# * a revision is specified which cannot be resolve to a SHA1
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# * a non-existent stash reference is specified
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#
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parse_flags_and_rev()
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{
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test "$PARSE_CACHE" = "$*" && return 0 # optimisation
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PARSE_CACHE="$*"
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IS_STASH_LIKE=
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IS_STASH_REF=
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INDEX_OPTION=
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s=
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w_commit=
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b_commit=
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i_commit=
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w_tree=
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b_tree=
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i_tree=
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REV=$(git rev-parse --no-flags --symbolic "$@" 2>/dev/null)
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FLAGS=$(git rev-parse --no-revs -- "$@" 2>/dev/null)
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set -- $FLAGS
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FLAGS=
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while test $# -ne 0
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do
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case "$1" in
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-q|--quiet)
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GIT_QUIET=-t
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;;
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--index)
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INDEX_OPTION=--index
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;;
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--)
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:
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;;
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*)
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FLAGS="${FLAGS}${FLAGS:+ }$1"
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;;
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esac
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shift
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done
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set -- $REV
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case $# in
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0)
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have_stash || die "No stash found."
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set -- ${ref_stash}@{0}
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;;
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1)
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:
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;;
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*)
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die "Too many revisions specified: $REV"
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;;
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esac
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REV=$(git rev-parse --quiet --symbolic --verify $1 2>/dev/null) || die "$1 is not valid reference"
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i_commit=$(git rev-parse --quiet --verify $REV^2 2>/dev/null) &&
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set -- $(git rev-parse $REV $REV^1 $REV: $REV^1: $REV^2: 2>/dev/null) &&
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s=$1 &&
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w_commit=$1 &&
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b_commit=$2 &&
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w_tree=$3 &&
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b_tree=$4 &&
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i_tree=$5 &&
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IS_STASH_LIKE=t &&
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test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
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IS_STASH_REF=t
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if test "${REV}" != "${REV%{*\}}"
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then
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# maintainers: it would be better if git rev-parse indicated
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# this condition with a non-zero status code but as of 1.7.2.1 it
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# it did not. So, we use non-empty stderr output as a proxy for the
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# condition of interest.
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test -z "$(git rev-parse "$REV" 2>&1 >/dev/null)" || die "$REV does not exist in the stash log"
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fi
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}
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is_stash_like()
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{
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parse_flags_and_rev "$@"
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test -n "$IS_STASH_LIKE"
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}
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assert_stash_like() {
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is_stash_like "$@" || die "'$*' is not a stash-like commit"
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}
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is_stash_ref() {
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is_stash_like "$@" && test -n "$IS_STASH_REF"
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}
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assert_stash_ref() {
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is_stash_ref "$@" || die "'$*' is not a stash reference"
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}
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apply_stash () {
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assert_stash_like "$@"
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git update-index -q --refresh &&
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git diff-files --quiet --ignore-submodules ||
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die 'Cannot apply to a dirty working tree, please stage your changes'
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# current index state
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c_tree=$(git write-tree) ||
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die 'Cannot apply a stash in the middle of a merge'
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unstashed_index_tree=
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if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
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test "$c_tree" != "$i_tree"
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then
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git diff-tree --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 test -n "$GIT_QUIET"
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then
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export GIT_MERGE_VERBOSITY=0
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fi
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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-index --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 "$a"
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fi
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squelch=
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if test -n "$GIT_QUIET"
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then
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squelch='>/dev/null 2>&1'
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fi
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eval "git status $squelch" || :
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else
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# Merge conflict; keep the exit status from merge-recursive
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status=$?
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if test -n "$INDEX_OPTION"
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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 $status
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fi
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}
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pop_stash() {
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assert_stash_ref "$@"
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apply_stash "$@" &&
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drop_stash "$@"
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}
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drop_stash () {
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assert_stash_ref "$@"
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git reflog delete --updateref --rewrite "${REV}" &&
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say "Dropped ${REV} ($s)" || die "${REV}: Could not drop stash entry"
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# clear_stash if we just dropped the last stash entry
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git rev-parse --verify "$ref_stash@{0}" > /dev/null 2>&1 || clear_stash
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}
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apply_to_branch () {
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test -n "$1" || die 'No branch name specified'
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branch=$1
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shift 1
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set -- --index "$@"
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assert_stash_like "$@"
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git checkout -b $branch $REV^ &&
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apply_stash "$@"
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test -z "$IS_STASH_REF" || drop_stash "$@"
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}
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PARSE_CACHE='--not-parsed'
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# The default command is "save" if nothing but options are given
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seen_non_option=
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for opt
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do
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case "$opt" in
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-*) ;;
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*) seen_non_option=t; break ;;
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esac
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done
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test -n "$seen_non_option" || set "save" "$@"
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# Main command set
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case "$1" in
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list)
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shift
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list_stash "$@"
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;;
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show)
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shift
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show_stash "$@"
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;;
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save)
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shift
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save_stash "$@"
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;;
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apply)
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shift
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apply_stash "$@"
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;;
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clear)
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shift
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clear_stash "$@"
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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 "$w_commit"
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;;
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drop)
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shift
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drop_stash "$@"
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;;
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pop)
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shift
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pop_stash "$@"
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;;
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branch)
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shift
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apply_to_branch "$@"
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;;
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*)
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case $# in
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0)
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save_stash &&
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say '(To restore them type "git stash apply")'
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;;
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*)
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usage
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esac
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;;
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esac
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