From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.3 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI shortcircuit=no autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 27C9B1F405 for ; Wed, 8 Aug 2018 18:59:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730426AbeHHVUY (ORCPT ); Wed, 8 Aug 2018 17:20:24 -0400 Received: from mail-wm0-f66.google.com ([74.125.82.66]:53227 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729679AbeHHVUX (ORCPT ); Wed, 8 Aug 2018 17:20:23 -0400 Received: by mail-wm0-f66.google.com with SMTP id o11-v6so3779003wmh.2 for ; Wed, 08 Aug 2018 11:59:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=z6nSSCT8tA2VkqBhNdV6mewucJA3ue7Gtp7xhdGLxfk=; b=CXQC3Vzn2brulmczQLUYeAHwsaCcHXMtkRYViXOuDljIgvQrnjZAzQ4/tnPFgtY/n8 OevFVkKAXSi35HXl0AueeZZZ6QPePZdYGemoVJSMvZllZgj3fQ5HIMbl8tB4GzQck96A vyGh/9E6QipBPW/o0TcMMWljCBP9dm5ozGuDIDCfrHqJynZi/CxPfm8eW1NND3y5EEvz AI1fd/buxV+yvizUaV3ob9tDREt3h+3tZVEhs+LpNyI+giXlfSoSLojFLXnMjWJOy+17 q6bAGr2u+olzO4r1/wJp1ns8TKgxeD1Q5F8eUU/LXiBK0hqZSLRzqrdPGbFYriu00rs5 3e5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=z6nSSCT8tA2VkqBhNdV6mewucJA3ue7Gtp7xhdGLxfk=; b=RMGCX+0O2qRyplBnnjwva3YXvoajFf8mvxh6L+i6QOR2ulIU/7lKcqTa8oPR1x28rK Ql0rb2Qb7KZ3F6qZUnonwc3BiAbPQi4HYGoc1h4Mx/ff4DuPqCp1mGPQfr62PrBVJ1y4 lA597Y9pIdO8HxmIdoEuUVees3iUWulAJjNBAmVRqq1/Q0iC37bwAosIJnNO6WM+Y5a3 50D0s0v2sl4xTHNAElYoOLAeRdMtkPMlyOFkfrA644rc2cpXXgu8F/DIhLNSIE4Wck9/ SntcpDadEIy4CAg1RcmyoJ8mqSVVqOEFDMazC1HtYkSorwamLmDETQ4yQWwyYWSWSxGJ EaXw== X-Gm-Message-State: AOUpUlGx4OBHpeb7V9VNaEM+G6oVsquXAk9tYCeSoRLQonT8xdKdqU3+ HmNg2oX75ym1RcqSNX8Om1SX9mIh X-Google-Smtp-Source: AA+uWPzf1d67VYq2rStrrb1VIKVollYP5M/PfUSZmAu5WmXUSiJN02TYTVljMXF9A4pHkkANgCR9fg== X-Received: by 2002:a1c:f306:: with SMTP id q6-v6mr2623500wmq.111.1533754760121; Wed, 08 Aug 2018 11:59:20 -0700 (PDT) Received: from sebi-laptop.tendawifi.com ([86.127.74.86]) by smtp.gmail.com with ESMTPSA id p5-v6sm4238879wre.32.2018.08.08.11.59.19 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 08 Aug 2018 11:59:19 -0700 (PDT) From: Paul-Sebastian Ungureanu To: git@vger.kernel.org Subject: [GSoC][PATCH v7 05/26] stash: convert apply to builtin Date: Wed, 8 Aug 2018 21:58:44 +0300 Message-Id: <7ba9a8515d445d10af36a8a79071af51b90f5aef.1533753605.git.ungureanupaulsebastian@gmail.com> X-Mailer: git-send-email 2.18.0.573.g56500d98f In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Joel Teichroeb Add a builtin helper for performing stash commands. Converting all at once proved hard to review, so starting with just apply lets conversion get started without the other commands being finished. The helper is being implemented as a drop in replacement for stash so that when it is complete it can simply be renamed and the shell script deleted. Delete the contents of the apply_stash shell function and replace it with a call to stash--helper apply until pop is also converted. Signed-off-by: Joel Teichroeb Signed-off-by: Paul-Sebastian Ungureanu --- .gitignore | 1 + Makefile | 1 + builtin.h | 1 + builtin/stash--helper.c | 452 ++++++++++++++++++++++++++++++++++++++++ git-stash.sh | 78 +------ git.c | 1 + 6 files changed, 463 insertions(+), 71 deletions(-) create mode 100644 builtin/stash--helper.c diff --git a/.gitignore b/.gitignore index 3284a1e9b..3abbba81a 100644 --- a/.gitignore +++ b/.gitignore @@ -156,6 +156,7 @@ /git-show-ref /git-stage /git-stash +/git-stash--helper /git-status /git-stripspace /git-submodule diff --git a/Makefile b/Makefile index bc4fc8eea..af82bc7ee 100644 --- a/Makefile +++ b/Makefile @@ -1083,6 +1083,7 @@ BUILTIN_OBJS += builtin/shortlog.o BUILTIN_OBJS += builtin/show-branch.o BUILTIN_OBJS += builtin/show-index.o BUILTIN_OBJS += builtin/show-ref.o +BUILTIN_OBJS += builtin/stash--helper.o BUILTIN_OBJS += builtin/stripspace.o BUILTIN_OBJS += builtin/submodule--helper.o BUILTIN_OBJS += builtin/symbolic-ref.o diff --git a/builtin.h b/builtin.h index 0362f1ce2..55ceb1574 100644 --- a/builtin.h +++ b/builtin.h @@ -222,6 +222,7 @@ extern int cmd_show(int argc, const char **argv, const char *prefix); extern int cmd_show_branch(int argc, const char **argv, const char *prefix); extern int cmd_show_index(int argc, const char **argv, const char *prefix); extern int cmd_status(int argc, const char **argv, const char *prefix); +extern int cmd_stash__helper(int argc, const char **argv, const char *prefix); extern int cmd_stripspace(int argc, const char **argv, const char *prefix); extern int cmd_submodule__helper(int argc, const char **argv, const char *prefix); extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix); diff --git a/builtin/stash--helper.c b/builtin/stash--helper.c new file mode 100644 index 000000000..ef6a9d30d --- /dev/null +++ b/builtin/stash--helper.c @@ -0,0 +1,452 @@ +#include "builtin.h" +#include "config.h" +#include "parse-options.h" +#include "refs.h" +#include "lockfile.h" +#include "cache-tree.h" +#include "unpack-trees.h" +#include "merge-recursive.h" +#include "argv-array.h" +#include "run-command.h" +#include "dir.h" +#include "rerere.h" + +static const char * const git_stash_helper_usage[] = { + N_("git stash--helper apply [--index] [-q|--quiet] []"), + NULL +}; + +static const char * const git_stash_helper_apply_usage[] = { + N_("git stash--helper apply [--index] [-q|--quiet] []"), + NULL +}; + +static const char *ref_stash = "refs/stash"; +static int quiet; +static struct strbuf stash_index_path = STRBUF_INIT; + +/* + * w_commit is set to the commit containing the working tree + * b_commit is set to the base commit + * i_commit is set to the commit containing the index tree + * u_commit is set to the commit containing the untracked files tree + * w_tree is set to the working tree + * b_tree is set to the base tree + * i_tree is set to the index tree + * u_tree is set to the untracked files tree + */ + +struct stash_info { + struct object_id w_commit; + struct object_id b_commit; + struct object_id i_commit; + struct object_id u_commit; + struct object_id w_tree; + struct object_id b_tree; + struct object_id i_tree; + struct object_id u_tree; + struct strbuf revision; + int is_stash_ref; + int has_u; +}; + +static void free_stash_info(struct stash_info *info) +{ + strbuf_release(&info->revision); +} + +static void assert_stash_like(struct stash_info *info, const char * revision) +{ + if (get_oidf(&info->b_commit, "%s^1", revision) || + get_oidf(&info->w_tree, "%s:", revision) || + get_oidf(&info->b_tree, "%s^1:", revision) || + get_oidf(&info->i_tree, "%s^2:", revision)) { + free_stash_info(info); + error(_("'%s' is not a stash-like commit"), revision); + exit(128); + } +} + +static int get_stash_info(struct stash_info *info, int argc, const char **argv) +{ + struct strbuf symbolic = STRBUF_INIT; + int ret; + const char *revision; + const char *commit = NULL; + char *end_of_rev; + char *expanded_ref; + struct object_id dummy; + + if (argc > 1) { + int i; + struct strbuf refs_msg = STRBUF_INIT; + for (i = 0; i < argc; ++i) + strbuf_addf(&refs_msg, " '%s'", argv[i]); + + fprintf_ln(stderr, _("Too many revisions specified:%s"), + refs_msg.buf); + strbuf_release(&refs_msg); + + return -1; + } + + if (argc == 1) + commit = argv[0]; + + strbuf_init(&info->revision, 0); + if (!commit) { + if (!ref_exists(ref_stash)) { + free_stash_info(info); + fprintf_ln(stderr, "No stash entries found."); + return -1; + } + + strbuf_addf(&info->revision, "%s@{0}", ref_stash); + } else if (strspn(commit, "0123456789") == strlen(commit)) { + strbuf_addf(&info->revision, "%s@{%s}", ref_stash, commit); + } else { + strbuf_addstr(&info->revision, commit); + } + + revision = info->revision.buf; + + if (get_oid(revision, &info->w_commit)) { + error(_("%s is not a valid reference"), revision); + free_stash_info(info); + return -1; + } + + assert_stash_like(info, revision); + + info->has_u = !get_oidf(&info->u_tree, "%s^3:", revision); + + end_of_rev = strchrnul(revision, '@'); + strbuf_add(&symbolic, revision, end_of_rev - revision); + + ret = dwim_ref(symbolic.buf, symbolic.len, &dummy, &expanded_ref); + strbuf_release(&symbolic); + switch (ret) { + case 0: /* Not found, but valid ref */ + info->is_stash_ref = 0; + break; + case 1: + info->is_stash_ref = !strcmp(expanded_ref, ref_stash); + break; + default: /* Invalid or ambiguous */ + free_stash_info(info); + } + + free(expanded_ref); + return !(ret == 0 || ret == 1); +} + +static int reset_tree(struct object_id *i_tree, int update, int reset) +{ + struct unpack_trees_options opts; + int nr_trees = 1; + struct tree_desc t[MAX_UNPACK_TREES]; + struct tree *tree; + struct lock_file lock_file = LOCK_INIT; + + read_cache_preload(NULL); + if (refresh_cache(REFRESH_QUIET)) + return -1; + + hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR); + + memset(&opts, 0, sizeof(opts)); + + tree = parse_tree_indirect(i_tree); + if (parse_tree(tree)) + return -1; + + init_tree_desc(t, tree->buffer, tree->size); + + opts.head_idx = 1; + opts.src_index = &the_index; + opts.dst_index = &the_index; + opts.merge = 1; + opts.reset = reset; + opts.update = update; + opts.fn = oneway_merge; + + if (unpack_trees(nr_trees, t, &opts)) + return -1; + + if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) + return error(_("unable to write new index file")); + + return 0; +} + +static int diff_tree_binary(struct strbuf *out, struct object_id *w_commit) +{ + struct child_process cp = CHILD_PROCESS_INIT; + const char *w_commit_hex = oid_to_hex(w_commit); + + /* + * Diff-tree would not be very hard to replace with a native function, + * however it should be done together with apply_cached. + */ + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "diff-tree", "--binary", NULL); + argv_array_pushf(&cp.args, "%s^2^..%s^2", w_commit_hex, w_commit_hex); + + return pipe_command(&cp, NULL, 0, out, 0, NULL, 0); +} + +static int apply_cached(struct strbuf *out) +{ + struct child_process cp = CHILD_PROCESS_INIT; + + /* + * Apply currently only reads either from stdin or a file, thus + * apply_all_patches would have to be updated to optionally take a + * buffer. + */ + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "apply", "--cached", NULL); + return pipe_command(&cp, out->buf, out->len, NULL, 0, NULL, 0); +} + +static int reset_head(const char *prefix) +{ + struct child_process cp = CHILD_PROCESS_INIT; + + /* + * Reset is overall quite simple, however there is no current public + * API for resetting. + */ + cp.git_cmd = 1; + argv_array_push(&cp.args, "reset"); + + return run_command(&cp); +} + +static int get_newly_staged(struct strbuf *out, struct object_id *c_tree) +{ + struct child_process cp = CHILD_PROCESS_INIT; + const char *c_tree_hex = oid_to_hex(c_tree); + + /* + * diff-index is very similar to diff-tree above, and should be + * converted together with update_index. + */ + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "diff-index", "--cached", "--name-only", + "--diff-filter=A", NULL); + argv_array_push(&cp.args, c_tree_hex); + return pipe_command(&cp, NULL, 0, out, 0, NULL, 0); +} + +static int update_index(struct strbuf *out) +{ + struct child_process cp = CHILD_PROCESS_INIT; + + /* + * Update-index is very complicated and may need to have a public + * function exposed in order to remove this forking. + */ + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "update-index", "--add", "--stdin", NULL); + return pipe_command(&cp, out->buf, out->len, NULL, 0, NULL, 0); +} + +static int restore_untracked(struct object_id *u_tree) +{ + struct child_process cp = CHILD_PROCESS_INIT; + int res; + + /* + * We need to run restore files from a given index, but without + * affecting the current index, so we use GIT_INDEX_FILE with + * run_command to fork processes that will not interfere. + */ + cp.git_cmd = 1; + argv_array_push(&cp.args, "read-tree"); + argv_array_push(&cp.args, oid_to_hex(u_tree)); + argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s", + stash_index_path.buf); + if (run_command(&cp)) { + remove_path(stash_index_path.buf); + return -1; + } + + child_process_init(&cp); + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "checkout-index", "--all", NULL); + argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s", + stash_index_path.buf); + + res = run_command(&cp); + remove_path(stash_index_path.buf); + return res; +} + +static int do_apply_stash(const char *prefix, struct stash_info *info, + int index) +{ + struct merge_options o; + struct object_id c_tree; + struct object_id index_tree; + const struct object_id *bases[1]; + struct commit *result; + int ret; + int has_index = index; + + read_cache_preload(NULL); + if (refresh_cache(REFRESH_QUIET)) + return -1; + + if (write_cache_as_tree(&c_tree, 0, NULL) || reset_tree(&c_tree, 0, 0)) + return error(_("Cannot apply a stash in the middle of a merge")); + + if (index) { + if (!oidcmp(&info->b_tree, &info->i_tree) || !oidcmp(&c_tree, + &info->i_tree)) { + has_index = 0; + } else { + struct strbuf out = STRBUF_INIT; + + if (diff_tree_binary(&out, &info->w_commit)) { + strbuf_release(&out); + return -1; + } + + ret = apply_cached(&out); + strbuf_release(&out); + if (ret) + return -1; + + discard_cache(); + read_cache(); + if (write_cache_as_tree(&index_tree, 0, NULL)) + return -1; + + reset_head(prefix); + } + } + + if (info->has_u && restore_untracked(&info->u_tree)) + return error(_("Could not restore untracked files from stash")); + + init_merge_options(&o); + + o.branch1 = "Updated upstream"; + o.branch2 = "Stashed changes"; + + if (!oidcmp(&info->b_tree, &c_tree)) + o.branch1 = "Version stash was based on"; + + if (quiet) + o.verbosity = 0; + + if (o.verbosity >= 3) + printf_ln(_("Merging %s with %s"), o.branch1, o.branch2); + + bases[0] = &info->b_tree; + + ret = merge_recursive_generic(&o, &c_tree, &info->w_tree, 1, bases, + &result); + if (ret != 0) { + rerere(0); + + if (index) + fprintf_ln(stderr, _("Index was not unstashed.")); + + return ret; + } + + if (has_index) { + if (reset_tree(&index_tree, 0, 0)) + return -1; + } else { + struct strbuf out = STRBUF_INIT; + + if (get_newly_staged(&out, &c_tree)) { + strbuf_release(&out); + return -1; + } + + if (reset_tree(&c_tree, 0, 1)) { + strbuf_release(&out); + return -1; + } + + ret = update_index(&out); + strbuf_release(&out); + if (ret) + return -1; + + discard_cache(); + } + + if (quiet) { + if (refresh_cache(REFRESH_QUIET)) + warning("could not refresh index"); + } else { + struct child_process cp = CHILD_PROCESS_INIT; + + /* + * Status is quite simple and could be replaced with calls to + * wt_status in the future, but it adds complexities which may + * require more tests. + */ + cp.git_cmd = 1; + cp.dir = prefix; + argv_array_push(&cp.args, "status"); + run_command(&cp); + } + + return 0; +} + +static int apply_stash(int argc, const char **argv, const char *prefix) +{ + int index = 0; + struct stash_info info; + int ret; + struct option options[] = { + OPT__QUIET(&quiet, N_("be quiet, only report errors")), + OPT_BOOL(0, "index", &index, + N_("attempt to recreate the index")), + OPT_END() + }; + + argc = parse_options(argc, argv, prefix, options, + git_stash_helper_apply_usage, 0); + + if (get_stash_info(&info, argc, argv)) + return -1; + + ret = do_apply_stash(prefix, &info, index); + free_stash_info(&info); + return ret; +} + +int cmd_stash__helper(int argc, const char **argv, const char *prefix) +{ + pid_t pid = getpid(); + const char *index_file; + + struct option options[] = { + OPT_END() + }; + + git_config(git_default_config, NULL); + + argc = parse_options(argc, argv, prefix, options, git_stash_helper_usage, + PARSE_OPT_KEEP_UNKNOWN | PARSE_OPT_KEEP_DASHDASH); + + index_file = get_index_file(); + strbuf_addf(&stash_index_path, "%s.stash.%" PRIuMAX, index_file, + (uintmax_t)pid); + + if (argc < 1) + usage_with_options(git_stash_helper_usage, options); + if (!strcmp(argv[0], "apply")) + return !!apply_stash(argc, argv, prefix); + + usage_msg_opt(xstrfmt(_("unknown subcommand: %s"), argv[0]), + git_stash_helper_usage, options); +} diff --git a/git-stash.sh b/git-stash.sh index 94793c1a9..809b1c2d1 100755 --- a/git-stash.sh +++ b/git-stash.sh @@ -566,76 +566,11 @@ assert_stash_ref() { } apply_stash () { - - assert_stash_like "$@" - - git update-index -q --refresh || die "$(gettext "unable to refresh index")" - - # current index state - c_tree=$(git write-tree) || - die "$(gettext "Cannot apply a stash in the middle of a merge")" - - unstashed_index_tree= - if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" && - test "$c_tree" != "$i_tree" - then - git diff-tree --binary $s^2^..$s^2 | git apply --cached - test $? -ne 0 && - die "$(gettext "Conflicts in index. Try without --index.")" - unstashed_index_tree=$(git write-tree) || - die "$(gettext "Could not save index tree")" - git reset - fi - - if test -n "$u_tree" - then - GIT_INDEX_FILE="$TMPindex" git read-tree "$u_tree" && - GIT_INDEX_FILE="$TMPindex" git checkout-index --all && - rm -f "$TMPindex" || - die "$(gettext "Could not restore untracked files from stash entry")" - fi - - eval " - GITHEAD_$w_tree='Stashed changes' && - GITHEAD_$c_tree='Updated upstream' && - GITHEAD_$b_tree='Version stash was based on' && - export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree - " - - if test -n "$GIT_QUIET" - then - GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY - fi - if git merge-recursive $b_tree -- $c_tree $w_tree - then - # No conflict - if test -n "$unstashed_index_tree" - then - git read-tree "$unstashed_index_tree" - else - a="$TMP-added" && - git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" && - git read-tree --reset $c_tree && - git update-index --add --stdin <"$a" || - die "$(gettext "Cannot unstage modified files")" - rm -f "$a" - fi - squelch= - if test -n "$GIT_QUIET" - then - squelch='>/dev/null 2>&1' - fi - (cd "$START_DIR" && eval "git status $squelch") || : - else - # Merge conflict; keep the exit status from merge-recursive - status=$? - git rerere - if test -n "$INDEX_OPTION" - then - gettextln "Index was not unstashed." >&2 - fi - exit $status - fi + cd "$START_DIR" + git stash--helper apply "$@" + res=$? + cd_to_toplevel + return $res } pop_stash() { @@ -713,7 +648,8 @@ push) ;; apply) shift - apply_stash "$@" + cd "$START_DIR" + git stash--helper apply "$@" ;; clear) shift diff --git a/git.c b/git.c index fc7d15d54..a3c83f57e 100644 --- a/git.c +++ b/git.c @@ -543,6 +543,7 @@ static struct cmd_struct commands[] = { { "show-index", cmd_show_index }, { "show-ref", cmd_show_ref, RUN_SETUP }, { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, + { "stash--helper", cmd_stash__helper, RUN_SETUP | NEED_WORK_TREE }, { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, { "stripspace", cmd_stripspace }, { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT }, -- 2.18.0.573.g56500d98f