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https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
![Jon Seymour](/assets/img/avatar_default.png)
Introduce parse_flags_and_revs. This function requires that there is at most one stash-like revision parameter and zero or more flags. It knows how to parse -q,--quiet and --index flags, but leaves other flags parsed. Specified revisions are checked to see that they are at least stash-like (meaning: they look like something created by git stash save or git stash create). If this is so, then IS_STASH_LIKE is initialized to a non-empty value. If the specified revision also looks like a stash log entry reference, then IS_STASH_REF is initialized to a non-empty value. References of the form ref@{spec} are required to precisely identify an individual commit. If no reference is specified, stash@{0} is assumed. Once the specified reference is validated to be at least stash_like an ensemble of derived variables, (w_commit, w_tree, b_commit, etc) is initialized with a single call to git rev-parse. Repeated calls to parse_flags_and_rev() avoid repeated calls to git rev-parse if the specified arguments have already been parsed. Subsequent patches in the series modify the existing git stash subcommands to make use of these functions as appropriate. An ensemble of supporting functions that make use of the state established by parse_flags_and_rev(). These are described below: The ancillary functions are: is_stash_like(): which can be used to test whether a specified commit looks like a commit created with git stash save or git stash create. assert_stash_like(): which can be used by commands that misbehave unless their arguments stash-like. is_stash_ref(): which checks whether an argument is valid stash reference(e.g. is of the form ['refs/']stash['@{'something'}]) assert_stash_ref(): which can be used by commands that misbehave unless their arguments are both stash-like and refer to valid stash entries. Signed-off-by: Jon Seymour <jon.seymour@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
569 lines
11 KiB
Bash
Executable file
569 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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}
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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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applied_stash=
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unstash_index=
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while test $# != 0
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do
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case "$1" in
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--index)
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unstash_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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break
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;;
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esac
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shift
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done
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if test $# = 0
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then
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have_stash || die 'Nothing to apply'
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applied_stash="$ref_stash@{0}"
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else
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applied_stash="$*"
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fi
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# stash records the work tree, and is a merge between the
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# base commit (first parent) and the index tree (second parent).
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s=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
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w_tree=$(git rev-parse --quiet --verify "$s:") &&
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b_tree=$(git rev-parse --quiet --verify "$s^1:") &&
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i_tree=$(git rev-parse --quiet --verify "$s^2:") ||
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die "$*: no valid stashed state found"
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git update-index -q --refresh &&
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git diff-files --quiet --ignore-submodules ||
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die 'Cannot apply to a dirty working tree, please stage your changes'
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# current index state
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c_tree=$(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 "$unstash_index" && test "$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 "$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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drop_stash () {
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have_stash || die 'No stash entries to drop'
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while test $# != 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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*)
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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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if test $# = 0
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then
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set x "$ref_stash@{0}"
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shift
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fi
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# Verify supplied argument looks like a stash entry
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s=$(git rev-parse --verify "$@") &&
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git rev-parse --verify "$s:" > /dev/null 2>&1 &&
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git rev-parse --verify "$s^1:" > /dev/null 2>&1 &&
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git rev-parse --verify "$s^2:" > /dev/null 2>&1 ||
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die "$*: not a valid stashed state"
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git reflog delete --updateref --rewrite "$@" &&
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say "Dropped $* ($s)" || die "$*: Could not drop stash entry"
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# clear_stash if we just dropped the last stash entry
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git rev-parse --verify "$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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|
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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 "$@"
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;;
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clear)
|
|
shift
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|
clear_stash "$@"
|
|
;;
|
|
create)
|
|
if test $# -gt 0 && test "$1" = create
|
|
then
|
|
shift
|
|
fi
|
|
create_stash "$*" && echo "$w_commit"
|
|
;;
|
|
drop)
|
|
shift
|
|
drop_stash "$@"
|
|
;;
|
|
pop)
|
|
shift
|
|
if apply_stash "$@"
|
|
then
|
|
drop_stash "$applied_stash"
|
|
fi
|
|
;;
|
|
branch)
|
|
shift
|
|
apply_to_branch "$@"
|
|
;;
|
|
*)
|
|
case $# in
|
|
0)
|
|
save_stash &&
|
|
say '(To restore them type "git stash apply")'
|
|
;;
|
|
*)
|
|
usage
|
|
esac
|
|
;;
|
|
esac
|