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merge: teach --autostash option
In rebase, one can pass the `--autostash` option to cause the worktree to be automatically stashed before continuing with the rebase. This option is missing in merge, however. Implement the `--autostash` option and corresponding `merge.autoStash` option in merge which stashes before merging and then pops after. This option is useful when a developer has some local changes on a topic branch but they realize that their work depends on another branch. Previously, they had to run something like git fetch ... git stash push git merge FETCH_HEAD git stash pop but now, that is reduced to git fetch ... git merge --autostash FETCH_HEAD When an autostash is generated, it is automatically reapplied to the worktree only in three explicit situations: 1. An incomplete merge is commit using `git commit`. 2. A merge completes successfully. 3. A merge is aborted using `git merge --abort`. In all other situations where the merge state is removed using remove_merge_branch_state() such as aborting a merge via `git reset --hard`, the autostash is saved into the stash reflog instead keeping the worktree clean. Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk> Suggested-by: Alban Gruin <alban.gruin@gmail.com> Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
parent
804fe31557
commit
a03b55530a
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@ -70,6 +70,16 @@ merge.stat::
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Whether to print the diffstat between ORIG_HEAD and the merge result
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at the end of the merge. True by default.
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merge.autoStash::
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When set to true, automatically create a temporary stash entry
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before the operation begins, and apply it after the operation
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ends. This means that you can run merge on a dirty worktree.
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However, use with care: the final stash application after a
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successful merge might result in non-trivial conflicts.
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This option can be overridden by the `--no-autostash` and
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`--autostash` options of linkgit:git-merge[1].
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Defaults to false.
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merge.tool::
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Controls which merge tool is used by linkgit:git-mergetool[1].
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The list below shows the valid built-in values.
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@ -94,7 +94,8 @@ will be appended to the specified message.
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--abort::
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Abort the current conflict resolution process, and
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try to reconstruct the pre-merge state.
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try to reconstruct the pre-merge state. If an autostash entry is
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present, apply it to the worktree.
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+
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If there were uncommitted worktree changes present when the merge
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started, 'git merge --abort' will in some cases be unable to
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@ -102,11 +103,15 @@ reconstruct these changes. It is therefore recommended to always
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commit or stash your changes before running 'git merge'.
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+
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'git merge --abort' is equivalent to 'git reset --merge' when
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`MERGE_HEAD` is present.
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`MERGE_HEAD` is present unless `MERGE_AUTOSTASH` is also present in
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which case 'git merge --abort' applies the stash entry to the worktree
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whereas 'git reset --merge' will save the stashed changes in the stash
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reflog.
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--quit::
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Forget about the current merge in progress. Leave the index
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and the working tree as-is.
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and the working tree as-is. If `MERGE_AUTOSTASH` is present, the
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stash entry will be saved to the stash reflog.
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--continue::
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After a 'git merge' stops due to conflicts you can conclude the
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@ -155,6 +155,14 @@ ifndef::git-pull[]
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Note that not all merge strategies may support progress
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reporting.
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--autostash::
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--no-autostash::
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Automatically create a temporary stash entry before the operation
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begins, and apply it after the operation ends. This means
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that you can run the operation on a dirty worktree. However, use
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with care: the final stash application after a successful
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merge might result in non-trivial conflicts.
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endif::git-pull[]
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--allow-unrelated-histories::
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1
branch.c
1
branch.c
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@ -344,6 +344,7 @@ void remove_merge_branch_state(struct repository *r)
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unlink(git_path_merge_rr(r));
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unlink(git_path_merge_msg(r));
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unlink(git_path_merge_mode(r));
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save_autostash(git_path_merge_autostash(r));
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}
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void remove_branch_state(struct repository *r, int verbose)
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@ -1713,6 +1713,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
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&oid, flags);
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}
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apply_autostash(git_path_merge_autostash(the_repository));
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UNLEAK(err);
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UNLEAK(sb);
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return 0;
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@ -82,6 +82,7 @@ static int show_progress = -1;
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static int default_to_upstream = 1;
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static int signoff;
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static const char *sign_commit;
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static int autostash;
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static int no_verify;
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static struct strategy all_strategy[] = {
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@ -286,6 +287,7 @@ static struct option builtin_merge_options[] = {
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OPT_SET_INT(0, "progress", &show_progress, N_("force progress reporting"), 1),
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{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
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N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
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OPT_AUTOSTASH(&autostash),
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OPT_BOOL(0, "overwrite-ignore", &overwrite_ignore, N_("update ignored files (default)")),
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OPT_BOOL(0, "signoff", &signoff, N_("add Signed-off-by:")),
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OPT_BOOL(0, "no-verify", &no_verify, N_("bypass pre-merge-commit and commit-msg hooks")),
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@ -475,6 +477,7 @@ static void finish(struct commit *head_commit,
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/* Run a post-merge hook */
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run_hook_le(NULL, "post-merge", squash ? "1" : "0", NULL);
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apply_autostash(git_path_merge_autostash(the_repository));
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strbuf_release(&reflog_message);
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}
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@ -634,6 +637,9 @@ static int git_merge_config(const char *k, const char *v, void *cb)
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return 0;
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} else if (!strcmp(k, "gpg.mintrustlevel")) {
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check_trust_level = 0;
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} else if (!strcmp(k, "merge.autostash")) {
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autostash = git_config_bool(k, v);
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return 0;
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}
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status = fmt_merge_msg_config(k, v, cb);
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@ -1281,6 +1287,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
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if (abort_current_merge) {
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int nargc = 2;
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const char *nargv[] = {"reset", "--merge", NULL};
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struct strbuf stash_oid = STRBUF_INIT;
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if (orig_argc != 2)
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usage_msg_opt(_("--abort expects no arguments"),
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@ -1289,8 +1296,17 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
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if (!file_exists(git_path_merge_head(the_repository)))
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die(_("There is no merge to abort (MERGE_HEAD missing)."));
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if (read_oneliner(&stash_oid, git_path_merge_autostash(the_repository),
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READ_ONELINER_SKIP_IF_EMPTY))
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unlink(git_path_merge_autostash(the_repository));
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/* Invoke 'git reset --merge' */
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ret = cmd_reset(nargc, nargv, prefix);
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if (stash_oid.len)
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apply_autostash_oid(stash_oid.buf);
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strbuf_release(&stash_oid);
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goto done;
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}
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@ -1513,6 +1529,10 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
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goto done;
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}
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if (autostash)
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create_autostash(the_repository,
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git_path_merge_autostash(the_repository),
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"merge");
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if (checkout_fast_forward(the_repository,
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&head_commit->object.oid,
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&commit->object.oid,
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if (fast_forward == FF_ONLY)
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die(_("Not possible to fast-forward, aborting."));
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if (autostash)
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create_autostash(the_repository,
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git_path_merge_autostash(the_repository),
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"merge");
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/* We are going to make a new commit. */
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git_committer_info(IDENT_STRICT);
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@ -1376,8 +1376,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
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{ OPTION_STRING, 'S', "gpg-sign", &gpg_sign, N_("key-id"),
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N_("GPG-sign commits"),
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PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
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OPT_BOOL(0, "autostash", &options.autostash,
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N_("automatically stash/stash pop before and after")),
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OPT_AUTOSTASH(&options.autostash),
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OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
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N_("add exec lines after each commit of the "
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"editable list")),
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@ -336,5 +336,6 @@ int parse_opt_passthru_argv(const struct option *, const char *, int);
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#define OPT_CLEANUP(v) OPT_STRING(0, "cleanup", v, N_("mode"), N_("how to strip spaces and #comments from message"))
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#define OPT_PATHSPEC_FROM_FILE(v) OPT_FILENAME(0, "pathspec-from-file", v, N_("read pathspec from file"))
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#define OPT_PATHSPEC_FILE_NUL(v) OPT_BOOL(0, "pathspec-file-nul", v, N_("with --pathspec-from-file, pathspec elements are separated with NUL character"))
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#define OPT_AUTOSTASH(v) OPT_BOOL(0, "autostash", v, N_("automatically stash/stash pop before and after"))
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#endif
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1
path.c
1
path.c
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@ -1535,5 +1535,6 @@ REPO_GIT_PATH_FUNC(merge_msg, "MERGE_MSG")
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REPO_GIT_PATH_FUNC(merge_rr, "MERGE_RR")
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REPO_GIT_PATH_FUNC(merge_mode, "MERGE_MODE")
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REPO_GIT_PATH_FUNC(merge_head, "MERGE_HEAD")
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REPO_GIT_PATH_FUNC(merge_autostash, "MERGE_AUTOSTASH")
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REPO_GIT_PATH_FUNC(fetch_head, "FETCH_HEAD")
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REPO_GIT_PATH_FUNC(shallow, "shallow")
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4
path.h
4
path.h
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@ -177,11 +177,12 @@ struct path_cache {
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const char *merge_rr;
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const char *merge_mode;
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const char *merge_head;
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const char *merge_autostash;
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const char *fetch_head;
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const char *shallow;
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};
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#define PATH_CACHE_INIT { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
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#define PATH_CACHE_INIT { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
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const char *git_path_cherry_pick_head(struct repository *r);
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const char *git_path_revert_head(struct repository *r);
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const char *git_path_merge_rr(struct repository *r);
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const char *git_path_merge_mode(struct repository *r);
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const char *git_path_merge_head(struct repository *r);
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const char *git_path_merge_autostash(struct repository *r);
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const char *git_path_fetch_head(struct repository *r);
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const char *git_path_shallow(struct repository *r);
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test_must_fail git merge five
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'
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test_expect_success 'refuse two-project merge by default, quit before --autostash happens' '
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t3033_reset &&
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git reset --hard four &&
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echo change >>one.t &&
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git diff >expect &&
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test_must_fail git merge --autostash five 2>err &&
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test_i18ngrep ! "stash" err &&
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git diff >actual &&
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test_cmp expect actual
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'
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test_expect_success 'two-project merge with --allow-unrelated-histories' '
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t3033_reset &&
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git reset --hard four &&
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@ -149,4 +160,15 @@ test_expect_success 'two-project merge with --allow-unrelated-histories' '
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git diff --exit-code five
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'
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test_expect_success 'two-project merge with --allow-unrelated-histories with --autostash' '
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t3033_reset &&
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git reset --hard four &&
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echo change >>one.t &&
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git diff one.t >expect &&
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git merge --allow-unrelated-histories --autostash five 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git diff one.t >actual &&
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test_cmp expect actual
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'
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test_done
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132
t/t7600-merge.sh
132
t/t7600-merge.sh
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@ -30,13 +30,17 @@ Testing basic merge operations/option parsing.
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. "$TEST_DIRECTORY"/lib-gpg.sh
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test_write_lines 1 2 3 4 5 6 7 8 9 >file
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cp file file.orig
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test_write_lines '1 X' 2 3 4 5 6 7 8 9 >file.1
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test_write_lines 1 2 '3 X' 4 5 6 7 8 9 >file.3
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test_write_lines 1 2 3 4 '5 X' 6 7 8 9 >file.5
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test_write_lines 1 2 3 4 5 6 7 8 '9 X' >file.9
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test_write_lines 1 2 3 4 5 6 7 8 '9 Y' >file.9y
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test_write_lines '1 X' 2 3 4 5 6 7 8 9 >result.1
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test_write_lines '1 X' 2 3 4 '5 X' 6 7 8 9 >result.1-5
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test_write_lines '1 X' 2 3 4 5 6 7 8 '9 X' >result.1-9
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test_write_lines '1 X' 2 3 4 '5 X' 6 7 8 '9 X' >result.1-5-9
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test_write_lines '1 X' 2 '3 X' 4 '5 X' 6 7 8 '9 X' >result.1-3-5-9
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test_write_lines 1 2 3 4 5 6 7 8 '9 Z' >result.9z
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create_merge_msgs () {
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@ -675,6 +679,134 @@ test_expect_success 'refresh the index before merging' '
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git merge c3
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'
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test_expect_success 'merge with --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git merge --autostash c2 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git show HEAD:file >merge-result &&
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test_cmp result.1-5 merge-result &&
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test_cmp result.1-5-9 file
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'
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test_expect_success 'merge with merge.autoStash' '
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test_config merge.autoStash true &&
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git merge c2 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git show HEAD:file >merge-result &&
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test_cmp result.1-5 merge-result &&
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test_cmp result.1-5-9 file
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'
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test_expect_success 'fast-forward merge with --autostash' '
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git reset --hard c0 &&
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git merge-file file file.orig file.5 &&
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git merge --autostash c1 2>err &&
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test_i18ngrep "Applied autostash." err &&
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test_cmp result.1-5 file
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'
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test_expect_success 'octopus merge with --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.3 &&
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git merge --autostash c2 c3 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git show HEAD:file >merge-result &&
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test_cmp result.1-5-9 merge-result &&
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test_cmp result.1-3-5-9 file
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'
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test_expect_success 'conflicted merge with --autostash, --abort restores stash' '
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git reset --hard c3 &&
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cp file.1 file &&
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test_must_fail git merge --autostash c7 &&
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git merge --abort 2>err &&
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test_i18ngrep "Applied autostash." err &&
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test_cmp file.1 file
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'
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test_expect_success 'completed merge (git commit) with --no-commit and --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git diff >expect &&
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git merge --no-commit --autostash c2 &&
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git stash show -p MERGE_AUTOSTASH >actual &&
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test_cmp expect actual &&
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git commit 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git show HEAD:file >merge-result &&
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test_cmp result.1-5 merge-result &&
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test_cmp result.1-5-9 file
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'
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test_expect_success 'completed merge (git merge --continue) with --no-commit and --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git diff >expect &&
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git merge --no-commit --autostash c2 &&
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git stash show -p MERGE_AUTOSTASH >actual &&
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test_cmp expect actual &&
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git merge --continue 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git show HEAD:file >merge-result &&
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test_cmp result.1-5 merge-result &&
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test_cmp result.1-5-9 file
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'
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test_expect_success 'aborted merge (merge --abort) with --no-commit and --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git diff >expect &&
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git merge --no-commit --autostash c2 &&
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git stash show -p MERGE_AUTOSTASH >actual &&
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test_cmp expect actual &&
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git merge --abort 2>err &&
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test_i18ngrep "Applied autostash." err &&
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git diff >actual &&
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test_cmp expect actual
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'
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test_expect_success 'aborted merge (reset --hard) with --no-commit and --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git diff >expect &&
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git merge --no-commit --autostash c2 &&
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git stash show -p MERGE_AUTOSTASH >actual &&
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test_cmp expect actual &&
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git reset --hard 2>err &&
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test_i18ngrep "Autostash exists; creating a new stash entry." err &&
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git diff --exit-code
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'
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test_expect_success 'quit merge with --no-commit and --autostash' '
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git reset --hard c1 &&
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git merge-file file file.orig file.9 &&
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git diff >expect &&
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git merge --no-commit --autostash c2 &&
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git stash show -p MERGE_AUTOSTASH >actual &&
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test_cmp expect actual &&
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git diff HEAD >expect &&
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git merge --quit 2>err &&
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test_i18ngrep "Autostash exists; creating a new stash entry." err &&
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git diff HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'merge with conflicted --autostash changes' '
|
||||
git reset --hard c1 &&
|
||||
git merge-file file file.orig file.9y &&
|
||||
git diff >expect &&
|
||||
test_when_finished "test_might_fail git stash drop" &&
|
||||
git merge --autostash c3 2>err &&
|
||||
test_i18ngrep "Applying autostash resulted in conflicts." err &&
|
||||
git show HEAD:file >merge-result &&
|
||||
test_cmp result.1-9 merge-result &&
|
||||
git stash show -p >actual &&
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
cat >expected.branch <<\EOF
|
||||
Merge branch 'c5-branch' (early part)
|
||||
EOF
|
||||
|
|
Loading…
Reference in a new issue