mirror of
https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
f276872d89
git stash pop is abstracted into its own implementation function - pop_stash. The behaviour is changed so that git stash pop fails early if the the specified stash reference does not exist or does not refer to an extant entry in the reflog of the reference stash. This fixes the case where the apply succeeds, but the drop fails. Previously this caused caused git stash pop to exit with a non-zero exit code and a dirty tree. Now, git stash pop fails with a non-zero exit code, but the working tree is not modified. Signed-off-by: Jon Seymour <jon.seymour@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
525 lines
11 KiB
Bash
Executable file
525 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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have_stash || die 'Nothing to apply'
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test -n "$1" || die 'No branch name specified'
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branch=$1
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if test -z "$2"
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then
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set x "$ref_stash@{0}"
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fi
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stash=$2
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git checkout -b $branch $stash^ &&
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apply_stash --index $stash &&
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drop_stash $stash
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}
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PARSE_CACHE='--not-parsed'
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# The default command is "save" if nothing but options are given
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seen_non_option=
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for opt
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do
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case "$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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