diff options
Diffstat (limited to 'builtin/checkout.c')
| -rw-r--r-- | builtin/checkout.c | 208 |
1 files changed, 182 insertions, 26 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c index 29ef50013d..ece4eb14bf 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -1,3 +1,4 @@ +#define USE_THE_INDEX_COMPATIBILITY_MACROS #include "builtin.h" #include "config.h" #include "checkout.h" @@ -25,6 +26,8 @@ #include "submodule.h" #include "advice.h" +static int checkout_optimize_new_branch; + static const char * const checkout_usage[] = { N_("git checkout [<options>] <branch>"), N_("git checkout [<options>] [<branch>] -- <file>..."), @@ -42,6 +45,11 @@ struct checkout_opts { int ignore_skipworktree; int ignore_other_worktrees; int show_progress; + int count_checkout_paths; + /* + * If new checkout options are added, skip_merge_working_tree + * should be updated accordingly. + */ const char *new_branch; const char *new_branch_force; @@ -96,7 +104,7 @@ static int update_some(const struct object_id *oid, struct strbuf *base, if (pos >= 0) { struct cache_entry *old = active_cache[pos]; if (ce->ce_mode == old->ce_mode && - !oidcmp(&ce->oid, &old->oid)) { + oideq(&ce->oid, &old->oid)) { old->ce_flags |= CE_UPDATE; discard_cache_entry(ce); return 0; @@ -109,7 +117,8 @@ static int update_some(const struct object_id *oid, struct strbuf *base, static int read_tree_some(struct tree *tree, const struct pathspec *pathspec) { - read_tree_recursive(tree, "", 0, 0, pathspec, update_some, NULL); + read_tree_recursive(the_repository, tree, "", 0, 0, + pathspec, update_some, NULL); /* update the index with the given tree's info * for all args, expanding wildcards, and exit @@ -159,12 +168,13 @@ static int check_stages(unsigned stages, const struct cache_entry *ce, int pos) } static int checkout_stage(int stage, const struct cache_entry *ce, int pos, - const struct checkout *state) + const struct checkout *state, int *nr_checkouts) { while (pos < active_nr && !strcmp(active_cache[pos]->name, ce->name)) { if (ce_stage(active_cache[pos]) == stage) - return checkout_entry(active_cache[pos], state, NULL); + return checkout_entry(active_cache[pos], state, + NULL, nr_checkouts); pos++; } if (stage == 2) @@ -173,7 +183,7 @@ static int checkout_stage(int stage, const struct cache_entry *ce, int pos, return error(_("path '%s' does not have their version"), ce->name); } -static int checkout_merged(int pos, const struct checkout *state) +static int checkout_merged(int pos, const struct checkout *state, int *nr_checkouts) { struct cache_entry *ce = active_cache[pos]; const char *path = ce->name; @@ -208,7 +218,8 @@ static int checkout_merged(int pos, const struct checkout *state) * merge.renormalize set, too */ status = ll_merge(&result_buf, path, &ancestor, "base", - &ours, "ours", &theirs, "theirs", NULL); + &ours, "ours", &theirs, "theirs", + state->istate, NULL); free(ancestor.ptr); free(ours.ptr); free(theirs.ptr); @@ -235,7 +246,7 @@ static int checkout_merged(int pos, const struct checkout *state) ce = make_transient_cache_entry(mode, &oid, path, 2); if (!ce) die(_("make_cache_entry failed for path '%s'"), path); - status = checkout_entry(ce, state, NULL); + status = checkout_entry(ce, state, NULL, nr_checkouts); discard_cache_entry(ce); return status; } @@ -250,6 +261,7 @@ static int checkout_paths(const struct checkout_opts *opts, struct commit *head; int errs = 0; struct lock_file lock_file = LOCK_INIT; + int nr_checkouts = 0; if (opts->track != BRANCH_TRACK_UNSPECIFIED) die(_("'%s' cannot be used with updating paths"), "--track"); @@ -277,7 +289,7 @@ static int checkout_paths(const struct checkout_opts *opts, return run_add_interactive(revision, "--patch=checkout", &opts->pathspec); - hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR); + repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR); if (read_cache_preload(&opts->pathspec) < 0) return error(_("index file corrupt")); @@ -364,17 +376,36 @@ static int checkout_paths(const struct checkout_opts *opts, struct cache_entry *ce = active_cache[pos]; if (ce->ce_flags & CE_MATCHED) { if (!ce_stage(ce)) { - errs |= checkout_entry(ce, &state, NULL); + errs |= checkout_entry(ce, &state, + NULL, &nr_checkouts); continue; } if (opts->writeout_stage) - errs |= checkout_stage(opts->writeout_stage, ce, pos, &state); + errs |= checkout_stage(opts->writeout_stage, + ce, pos, + &state, &nr_checkouts); else if (opts->merge) - errs |= checkout_merged(pos, &state); + errs |= checkout_merged(pos, &state, + &nr_checkouts); pos = skip_same_name(ce, pos) - 1; } } - errs |= finish_delayed_checkout(&state); + errs |= finish_delayed_checkout(&state, &nr_checkouts); + + if (opts->count_checkout_paths) { + if (opts->source_tree) + fprintf_ln(stderr, Q_("Checked out %d path out of %s", + "Checked out %d paths out of %s", + nr_checkouts), + nr_checkouts, + find_unique_abbrev(&opts->source_tree->object.oid, + DEFAULT_ABBREV)); + else + fprintf_ln(stderr, Q_("Checked out %d path out of the index", + "Checked out %d paths out of the index", + nr_checkouts), + nr_checkouts); + } if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) die(_("unable to write new index file")); @@ -391,7 +422,7 @@ static void show_local_changes(struct object *head, { struct rev_info rev; /* I think we want full paths, even if we're in a subdirectory. */ - init_revisions(&rev, NULL); + repo_init_revisions(the_repository, &rev, NULL); rev.diffopt.flags = opts->flags; rev.diffopt.output_format |= DIFF_FORMAT_NAME_STATUS; diff_setup_done(&rev.diffopt); @@ -472,6 +503,107 @@ static void setup_branch_path(struct branch_info *branch) branch->path = strbuf_detach(&buf, NULL); } +/* + * Skip merging the trees, updating the index and working directory if and + * only if we are creating a new branch via "git checkout -b <new_branch>." + */ +static int skip_merge_working_tree(const struct checkout_opts *opts, + const struct branch_info *old_branch_info, + const struct branch_info *new_branch_info) +{ + /* + * Do the merge if sparse checkout is on and the user has not opted in + * to the optimized behavior + */ + if (core_apply_sparse_checkout && !checkout_optimize_new_branch) + return 0; + + /* + * We must do the merge if we are actually moving to a new commit. + */ + if (!old_branch_info->commit || !new_branch_info->commit || + !oideq(&old_branch_info->commit->object.oid, + &new_branch_info->commit->object.oid)) + return 0; + + /* + * opts->patch_mode cannot be used with switching branches so is + * not tested here + */ + + /* + * opts->quiet only impacts output so doesn't require a merge + */ + + /* + * Honor the explicit request for a three-way merge or to throw away + * local changes + */ + if (opts->merge || opts->force) + return 0; + + /* + * --detach is documented as "updating the index and the files in the + * working tree" but this optimization skips those steps so fall through + * to the regular code path. + */ + if (opts->force_detach) + return 0; + + /* + * opts->writeout_stage cannot be used with switching branches so is + * not tested here + */ + + /* + * Honor the explicit ignore requests + */ + if (!opts->overwrite_ignore || opts->ignore_skipworktree || + opts->ignore_other_worktrees) + return 0; + + /* + * opts->show_progress only impacts output so doesn't require a merge + */ + + /* + * If we aren't creating a new branch any changes or updates will + * happen in the existing branch. Since that could only be updating + * the index and working directory, we don't want to skip those steps + * or we've defeated any purpose in running the command. + */ + if (!opts->new_branch) + return 0; + + /* + * new_branch_force is defined to "create/reset and checkout a branch" + * so needs to go through the merge to do the reset + */ + if (opts->new_branch_force) + return 0; + + /* + * A new orphaned branch requrires the index and the working tree to be + * adjusted to <start_point> + */ + if (opts->new_orphan_branch) + return 0; + + /* + * Remaining variables are not checkout options but used to track state + */ + + /* + * Do the merge if this is the initial checkout. We cannot use + * is_cache_unborn() here because the index hasn't been loaded yet + * so cache_nr and timestamp.sec are always zero. + */ + if (!file_exists(get_index_file())) + return 0; + + return 1; +} + static int merge_working_tree(const struct checkout_opts *opts, struct branch_info *old_branch_info, struct branch_info *new_branch_info, @@ -570,7 +702,7 @@ static int merge_working_tree(const struct checkout_opts *opts, * a pain; plumb in an option to set * o.renormalize? */ - init_merge_options(&o); + init_merge_options(&o, the_repository); o.verbosity = 0; work = write_tree_from_memory(&o); @@ -653,7 +785,8 @@ static void update_refs_for_switch(const struct checkout_opts *opts, free(refname); } else - create_branch(opts->new_branch, new_branch_info->name, + create_branch(the_repository, + opts->new_branch, new_branch_info->name, opts->new_branch_force ? 1 : 0, opts->new_branch_force ? 1 : 0, opts->new_branch_log, @@ -711,7 +844,7 @@ static void update_refs_for_switch(const struct checkout_opts *opts, delete_reflog(old_branch_info->path); } } - remove_branch_state(); + remove_branch_state(the_repository); strbuf_release(&msg); if (!opts->quiet && (new_branch_info->path || (!opts->force_detach && !strcmp(new_branch_info->name, "HEAD")))) @@ -800,7 +933,7 @@ static void orphaned_commit_warning(struct commit *old_commit, struct commit *ne struct rev_info revs; struct object *object = &old_commit->object; - init_revisions(&revs, NULL); + repo_init_revisions(the_repository, &revs, NULL); setup_revisions(0, NULL, &revs, NULL); object->flags &= ~UNINTERESTING; @@ -846,10 +979,19 @@ static int switch_branches(const struct checkout_opts *opts, parse_commit_or_die(new_branch_info->commit); } - ret = merge_working_tree(opts, &old_branch_info, new_branch_info, &writeout_error); - if (ret) { - free(path_to_free); - return ret; + /* optimize the "checkout -b <new_branch> path */ + if (skip_merge_working_tree(opts, &old_branch_info, new_branch_info)) { + if (!checkout_optimize_new_branch && !opts->quiet) { + if (read_cache_preload(NULL) < 0) + return error(_("index file corrupt")); + show_local_changes(&new_branch_info->commit->object, &opts->diff_options); + } + } else { + ret = merge_working_tree(opts, &old_branch_info, new_branch_info, &writeout_error); + if (ret) { + free(path_to_free); + return ret; + } } if (!opts->quiet && !old_branch_info.path && old_branch_info.commit && new_branch_info->commit != old_branch_info.commit) @@ -864,6 +1006,11 @@ static int switch_branches(const struct checkout_opts *opts, static int git_checkout_config(const char *var, const char *value, void *cb) { + if (!strcmp(var, "checkout.optimizenewbranch")) { + checkout_optimize_new_branch = git_config_bool(var, value); + return 0; + } + if (!strcmp(var, "diff.ignoresubmodules")) { struct checkout_opts *opts = cb; handle_ignore_submodules_arg(&opts->diff_options, value); @@ -950,6 +1097,7 @@ static int parse_branchname_arg(int argc, const char **argv, has_dash_dash = 1; /* case (3) or (1) */ else if (dash_dash_pos >= 2) die(_("only one reference expected, %d given."), dash_dash_pos); + opts->count_checkout_paths = !opts->quiet && !has_dash_dash; if (!strcmp(arg, "-")) arg = "@{-1}"; @@ -965,9 +1113,12 @@ static int parse_branchname_arg(int argc, const char **argv, */ int recover_with_dwim = dwim_new_local_branch_ok; - if (!has_dash_dash && - (check_filename(opts->prefix, arg) || !no_wildcard(arg))) + int could_be_checkout_paths = !has_dash_dash && + check_filename(opts->prefix, arg); + + if (!has_dash_dash && !no_wildcard(arg)) recover_with_dwim = 0; + /* * Accept "git checkout foo" and "git checkout foo --" * as candidates for dwim. @@ -980,6 +1131,10 @@ static int parse_branchname_arg(int argc, const char **argv, const char *remote = unique_tracking_name(arg, rev, dwim_remotes_matched); if (remote) { + if (could_be_checkout_paths) + die(_("'%s' could be both a local file and a tracking branch.\n" + "Please use -- (and optionally --no-guess) to disambiguate"), + arg); *new_branch = arg; arg = remote; /* DWIMmed to create local branch, case (3).(b) */ @@ -1114,7 +1269,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) struct checkout_opts opts; struct branch_info new_branch_info; char *conflict_style = NULL; - int dwim_new_local_branch = 1; + int dwim_new_local_branch, no_dwim_new_local_branch = 0; int dwim_remotes_matched = 0; struct option options[] = { OPT__QUIET(&opts.quiet, N_("suppress progress reporting")), @@ -1144,8 +1299,8 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) OPT_BOOL('p', "patch", &opts.patch_mode, N_("select hunks interactively")), OPT_BOOL(0, "ignore-skip-worktree-bits", &opts.ignore_skipworktree, N_("do not limit pathspecs to sparse entries only")), - OPT_HIDDEN_BOOL(0, "guess", &dwim_new_local_branch, - N_("second guess 'git checkout <no-such-branch>'")), + OPT_BOOL(0, "no-guess", &no_dwim_new_local_branch, + N_("do not second guess 'git checkout <no-such-branch>'")), OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees, N_("do not check if another worktree is holding the given ref")), { OPTION_CALLBACK, 0, "recurse-submodules", NULL, @@ -1168,6 +1323,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) argc = parse_options(argc, argv, prefix, options, checkout_usage, PARSE_OPT_KEEP_DASHDASH); + dwim_new_local_branch = !no_dwim_new_local_branch; if (opts.show_progress < 0) { if (opts.quiet) opts.show_progress = 0; |