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=-3.9 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 94F701F597 for ; Mon, 30 Jul 2018 16:30:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731908AbeG3SFp (ORCPT ); Mon, 30 Jul 2018 14:05:45 -0400 Received: from mail-ed1-f68.google.com ([209.85.208.68]:37115 "EHLO mail-ed1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726760AbeG3SFp (ORCPT ); Mon, 30 Jul 2018 14:05:45 -0400 Received: by mail-ed1-f68.google.com with SMTP id b10-v6so4397570eds.4 for ; Mon, 30 Jul 2018 09:29:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tErg/WTb+p6tvjJfJylWmXyqqK7Dzwr5XXs7R15Ra6M=; b=YZl5mwCOaoo157wBOMlNevP3bxg5ZUsUChTPAzDAqhf+6LhRA+1QzHRDfojoNISv11 H51Wxj1JaYRKfJeX2iko8FJZefLRAFDCtsZ5Jfu1hScieENVrPsjkc9K6UCJhobm5jXq z6Jty+YU96BsmgbTJBsIH5niBWOA89kezLh30HL3AGSOIYMkaA2mZNxCFwhqPoTcEM62 Sul0awYn0BHcIaO+i5tBQWM2Y4HgiyrQyLdd1jaO9CKtc50hVs3cgi3Rx1xFYWBzoPlo CJwJ+kcUNB0Dl+i+/3akIZR4KtYS+JzxHv0P3RXOmTj2kN3HzvjTHa9kt58A7Uk84bzg WaUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tErg/WTb+p6tvjJfJylWmXyqqK7Dzwr5XXs7R15Ra6M=; b=roQuBFEvnPKujfgCmOf6fEawIyTci2vFQ4ZVzBk322Lt7dt6ssu6moP3Rb56PzT0CV p727dsUJwbDQC1nObUWJOGs07lTJLFl0yJ6fR0zEJybiWC6gsClPEo9peSqsAylUPy+K 3nWaJJo5ozn3GUYyoLdeWQobHMeKRWd7TvBjJ6O9aUnWCWnpQ9gD9bnBMnDJbpB391bt ZrBwH9S9ERwkYjyKxq05uphMzOfI/Mwo+RzL3jxs/9skGncC9uaMpSya3ATJUpIsB+qb Sk4j+VpFLFvMneEXty3GhYnsGyOPMXuapNr/68DsjxaMxfxxXmnIKmE7losrrVzkZ29o X9cA== X-Gm-Message-State: AOUpUlE9HmRFj3/ZUpS+JU3I9Jt3H7alQNuP5ZH9dUvmDVNsXYjstwhN f1RWvBHGG07deaZ8osQl0lrPrh6K/Ho= X-Google-Smtp-Source: AAOMgpeXwkJj6LT6A73B5nlfcyArN+npQPnjBa0GDglLP9rOp1XWnXmbNr5Nou+eCt1DJxI0KMLA2A== X-Received: by 2002:a50:adaa:: with SMTP id a39-v6mr8977869edd.194.1532968197985; Mon, 30 Jul 2018 09:29:57 -0700 (PDT) Received: from localhost.localdomain ([27.34.16.81]) by smtp.gmail.com with ESMTPSA id a13-v6sm2880906edf.84.2018.07.30.09.29.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Jul 2018 09:29:57 -0700 (PDT) From: Pratik Karki To: git@vger.kernel.org Cc: christian.couder@gmail.com, Johannes.Schindelin@gmx.de, sbeller@google.com, alban.gruin@gmail.com, gitster@pobox.com, rybak.a.v@gmail.com, dev+git@drbeat.li, pclouds@gmail.com, sunshine@sunshineco.com, Pratik Karki Subject: [PATCH v5 3/3] builtin/rebase: support running "git rebase " Date: Mon, 30 Jul 2018 22:14:20 +0545 Message-Id: <20180730162920.20318-4-predatoramigo@gmail.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180730162920.20318-1-predatoramigo@gmail.com> References: <20180708180104.17921-1-predatoramigo@gmail.com> <20180730162920.20318-1-predatoramigo@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org This patch gives life to the skeleton added in the previous patches: With this change, we can perform a elementary rebase (without any options). It can be tested thusly by: git -c rebase.usebuiltin=true rebase HEAD~2 The rebase backends (i.e. the shell script functions defined in `git-rebase--`) are still at work here and the "builtin rebase"'s purpose is simply to parse the options and set everything up so that those rebase backends can do their work. Note: We take an alternative approach here which is *not* to set the environment variables via `run_command_v_opt_cd_env()` because those variables would then be visible by processes spawned from the rebase backends. Instead, we work hard to set them in the shell script snippet. On Windows, some of the tests fail merely due to core.fileMode not being heeded that's why the core.*config variables is parsed here. The next commits will handle and support all the wonderful rebase options. Signed-off-by: Pratik Karki --- builtin/rebase.c | 350 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 349 insertions(+), 1 deletion(-) diff --git a/builtin/rebase.c b/builtin/rebase.c index c44addb2a4..5863139204 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -9,6 +9,24 @@ #include "exec-cmd.h" #include "argv-array.h" #include "dir.h" +#include "packfile.h" +#include "refs.h" +#include "quote.h" +#include "config.h" +#include "cache-tree.h" +#include "unpack-trees.h" +#include "lockfile.h" + +static GIT_PATH_FUNC(apply_dir, "rebase-apply") +static GIT_PATH_FUNC(merge_dir, "rebase-merge") + +enum rebase_type { + REBASE_UNSPECIFIED = -1, + REBASE_AM, + REBASE_MERGE, + REBASE_INTERACTIVE, + REBASE_PRESERVE_MERGES +}; static int use_builtin_rebase(void) { @@ -30,8 +48,243 @@ static int use_builtin_rebase(void) return ret; } +static int apply_autostash(void) +{ + warning("TODO"); + return 0; +} + +struct rebase_options { + enum rebase_type type; + const char *state_dir; + struct commit *upstream; + const char *upstream_name; + char *head_name; + struct object_id orig_head; + struct commit *onto; + const char *onto_name; + const char *revisions; + const char *root; + const char *restrict_revision; +}; + +static int finish_rebase(struct rebase_options *opts) +{ + struct strbuf dir = STRBUF_INIT; + const char *argv_gc_auto[] = { "gc", "--auto", NULL }; + + delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); + apply_autostash(); + close_all_packs(the_repository->objects); + /* + * We ignore errors in 'gc --auto', since the + * user should see them. + */ + run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); + strbuf_addstr(&dir, opts->state_dir); + remove_dir_recursively(&dir, 0); + strbuf_release(&dir); + + return 0; +} + +static struct commit *peel_committish(const char *name) +{ + struct object *obj; + struct object_id oid; + + if (get_oid(name, &oid)) + return NULL; + obj = parse_object(&oid); + return (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); +} + +static void add_var(struct strbuf *buf, const char *name, const char *value) +{ + strbuf_addstr(buf, name); + if (value) { + strbuf_addstr(buf, "="); + sq_quote_buf(buf, value); + } + strbuf_addstr(buf, "; "); +} + +static int run_specific_rebase(struct rebase_options *opts) +{ + const char *argv[] = { NULL, NULL }; + struct strbuf script_snippet = STRBUF_INIT; + int status; + const char *backend, *backend_func; + + add_var(&script_snippet, "GIT_DIR", absolute_path(get_git_dir())); + add_var(&script_snippet, "state_dir", opts->state_dir); + + add_var(&script_snippet, "upstream_name", opts->upstream_name); + add_var(&script_snippet, "upstream", + oid_to_hex(&opts->upstream->object.oid)); + add_var(&script_snippet, "head_name", opts->head_name); + add_var(&script_snippet, "orig_head", oid_to_hex(&opts->orig_head)); + add_var(&script_snippet, "onto", oid_to_hex(&opts->onto->object.oid)); + add_var(&script_snippet, "onto_name", opts->onto_name); + add_var(&script_snippet, "revisions", opts->revisions); + if (opts->restrict_revision == NULL) + add_var(&script_snippet, "restrict_revision", ""); + else + add_var(&script_snippet, "restrict_revision", + opts->restrict_revision); + + switch (opts->type) { + case REBASE_AM: + backend = "git-rebase--am"; + backend_func = "git_rebase__am"; + break; + case REBASE_INTERACTIVE: + backend = "git-rebase--interactive"; + backend_func = "git_rebase__interactive"; + break; + case REBASE_MERGE: + backend = "git-rebase--merge"; + backend_func = "git_rebase__merge"; + break; + case REBASE_PRESERVE_MERGES: + backend = "git-rebase--preserve-merges"; + backend_func = "git_rebase__preserve_merges"; + break; + default: + BUG("Unhandled rebase type %d", opts->type); + break; + } + + strbuf_addf(&script_snippet, + ". git-sh-setup && . git-rebase--common && . %s && %s", + backend, backend_func); + argv[0] = script_snippet.buf; + + status = run_command_v_opt(argv, RUN_USING_SHELL); + if (status == 0) + finish_rebase(opts); + else if (status == 2) { + struct strbuf dir = STRBUF_INIT; + + apply_autostash(); + strbuf_addstr(&dir, opts->state_dir); + remove_dir_recursively(&dir, 0); + strbuf_release(&dir); + die("Nothing to do"); + } + + strbuf_release(&script_snippet); + + return status ? -1 : 0; +} + +#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION" + +static int reset_head(struct object_id *oid, const char *action, + const char *switch_to_branch, int detach_head) +{ + struct object_id head_oid; + struct tree_desc desc; + struct lock_file lock = LOCK_INIT; + struct unpack_trees_options unpack_tree_opts; + struct tree *tree; + const char *reflog_action; + struct strbuf msg = STRBUF_INIT; + size_t prefix_len; + struct object_id *orig = NULL, oid_orig, + *old_orig = NULL, oid_old_orig; + int ret = 0; + + if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) + return -1; + + if (!oid) { + if (get_oid("HEAD", &head_oid)) { + rollback_lock_file(&lock); + return error(_("could not determine HEAD revision")); + } + oid = &head_oid; + } + + memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts)); + setup_unpack_trees_porcelain(&unpack_tree_opts, action); + unpack_tree_opts.head_idx = 1; + unpack_tree_opts.src_index = the_repository->index; + unpack_tree_opts.dst_index = the_repository->index; + unpack_tree_opts.fn = oneway_merge; + unpack_tree_opts.update = 1; + if (!detach_head) + unpack_tree_opts.reset = 1; + else + unpack_tree_opts.merge = 1; + + if (read_index(the_repository->index) < 0) { + rollback_lock_file(&lock); + return error(_("could not read index")); + } + + if (!fill_tree_descriptor(&desc, oid)) { + error(_("failed to find tree of %s"), oid_to_hex(oid)); + rollback_lock_file(&lock); + free((void *)desc.buffer); + return -1; + } + + if (unpack_trees(1, &desc, &unpack_tree_opts)) { + rollback_lock_file(&lock); + free((void *)desc.buffer); + return -1; + } + + tree = parse_tree_indirect(oid); + prime_cache_tree(the_repository->index, tree); + + if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) + ret = error(_("could not write index")); + free((void *)desc.buffer); + + if (ret) + return ret; + + reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT); + strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase"); + prefix_len = msg.len; + + if (!get_oid("ORIG_HEAD", &oid_old_orig)) + old_orig = &oid_old_orig; + if (!get_oid("HEAD", &oid_orig)) { + orig = &oid_orig; + strbuf_addstr(&msg, "updating ORIG_HEAD"); + update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, + UPDATE_REFS_MSG_ON_ERR); + } else if (old_orig) + delete_ref(NULL, "ORIG_HEAD", old_orig, 0); + strbuf_setlen(&msg, prefix_len); + strbuf_addstr(&msg, "updating HEAD"); + if (!switch_to_branch) + ret = update_ref(msg.buf, "HEAD", oid, orig, REF_NO_DEREF, + UPDATE_REFS_MSG_ON_ERR); + else { + ret = create_symref("HEAD", switch_to_branch, msg.buf); + if (!ret) + ret = update_ref(msg.buf, "HEAD", oid, orig, 0, + UPDATE_REFS_MSG_ON_ERR); + } + + strbuf_release(&msg); + return ret; +} + int cmd_rebase(int argc, const char **argv, const char *prefix) { + struct rebase_options options = { + .type = REBASE_UNSPECIFIED, + }; + const char *branch_name; + int ret, flags, quiet = 0; + struct strbuf msg = STRBUF_INIT; + struct strbuf revisions = STRBUF_INIT; + /* * NEEDSWORK: Once the builtin rebase has been tested enough * and git-legacy-rebase.sh is retired to contrib/, this preamble @@ -54,5 +307,100 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) trace_repo_setup(prefix); setup_work_tree(); - die("TODO"); + git_config(git_default_config, NULL); + + switch (options.type) { + case REBASE_MERGE: + case REBASE_INTERACTIVE: + case REBASE_PRESERVE_MERGES: + options.state_dir = merge_dir(); + break; + case REBASE_AM: + options.state_dir = apply_dir(); + break; + default: + options.type = REBASE_AM; + options.state_dir = apply_dir(); + break; + } + + if (!options.root) { + if (argc < 2) + die("TODO: handle @{upstream}"); + else { + options.upstream_name = argv[1]; + argc--; + argv++; + if (!strcmp(options.upstream_name, "-")) + options.upstream_name = "@{-1}"; + } + options.upstream = peel_committish(options.upstream_name); + if (!options.upstream) + die(_("invalid upstream '%s'"), options.upstream_name); + } else + die("TODO: upstream for --root"); + + /* Make sure the branch to rebase onto is valid. */ + if (!options.onto_name) + options.onto_name = options.upstream_name; + if (strstr(options.onto_name, "...")) { + die("TODO"); + } else { + options.onto = peel_committish(options.onto_name); + if (!options.onto) + die(_("Does not point to a valid commit '%s'"), + options.onto_name); + } + + /* + * If the branch to rebase is given, that is the branch we will rebase + * branch_name -- branch/commit being rebased, or + * HEAD (already detached) + * orig_head -- commit object name of tip of the branch before rebasing + * head_name -- refs/heads/ or "detached HEAD" + */ + if (argc > 1) + die("TODO: handle switch_to"); + else { + /* Do not need to switch branches, we are already on it. */ + options.head_name = + xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL, + &flags)); + if (!options.head_name) + die(_("No such ref: %s"), "HEAD"); + if (flags & REF_ISSYMREF) { + if (!skip_prefix(options.head_name, + "refs/heads/", &branch_name)) + branch_name = options.head_name; + + } else { + options.head_name = xstrdup("detached HEAD"); + branch_name = "HEAD"; + } + if (get_oid("HEAD", &options.orig_head)) + die(_("Could not resolve HEAD to a revision")); + } + + /* Detach HEAD and reset the tree */ + if (!quiet) + printf("First, rewinding head to replay your work on top of it..."); + + strbuf_addf(&msg, "rebase: checkout %s", options.onto_name); + if (reset_head(&options.onto->object.oid, "checkout", NULL, 1)) + die(_("Could not detach HEAD")); + strbuf_release(&msg); + + strbuf_addf(&revisions, "%s..%s", + !options.root ? oid_to_hex(&options.onto->object.oid) : + (options.restrict_revision ? options.restrict_revision : + oid_to_hex(&options.upstream->object.oid)), + oid_to_hex(&options.orig_head)); + + options.revisions = revisions.buf; + + ret = !!run_specific_rebase(&options); + + strbuf_release(&revisions); + free(options.head_name); + return ret; } -- 2.18.0