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[76.68.143.128]) by smtp.gmail.com with ESMTPSA id a136sm3297503qkc.75.2020.04.03.18.12.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2020 18:12:13 -0700 (PDT) From: Denton Liu To: Git Mailing List Cc: Alban Gruin , Johannes Schindelin , Junio C Hamano , Phillip Wood Subject: [PATCH v4 14/23] reset: extract reset_head() from rebase Date: Fri, 3 Apr 2020 21:11:27 -0400 Message-Id: <045668620dc5173fddb899f38a976059c84b5465.1585962673.git.liu.denton@gmail.com> X-Mailer: git-send-email 2.26.0.159.g23e2136ad0 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 Continue the process of lib-ifying the autostash code. In a future commit, this will be used to implement `--autostash` in other builtins. This patch is best viewed with `--color-moved`. Signed-off-by: Denton Liu --- Makefile | 1 + builtin/rebase.c | 139 +--------------------------------------------- reset.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++ reset.h | 20 +++++++ 4 files changed, 162 insertions(+), 138 deletions(-) create mode 100644 reset.c create mode 100644 reset.h diff --git a/Makefile b/Makefile index f709fc3f77..338fb55b73 100644 --- a/Makefile +++ b/Makefile @@ -970,6 +970,7 @@ LIB_OBJS += replace-object.o LIB_OBJS += repo-settings.o LIB_OBJS += repository.o LIB_OBJS += rerere.o +LIB_OBJS += reset.o LIB_OBJS += resolve-undo.o LIB_OBJS += revision.o LIB_OBJS += run-command.o diff --git a/builtin/rebase.c b/builtin/rebase.c index 0f650a798e..55730f6360 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -27,6 +27,7 @@ #include "branch.h" #include "sequencer.h" #include "rebase-interactive.h" +#include "reset.h" #define DEFAULT_REFLOG_ACTION "rebase" @@ -761,144 +762,6 @@ static void add_var(struct strbuf *buf, const char *name, const char *value) } } -#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION" - -#define RESET_HEAD_DETACH (1<<0) -#define RESET_HEAD_HARD (1<<1) -#define RESET_HEAD_RUN_POST_CHECKOUT_HOOK (1<<2) -#define RESET_HEAD_REFS_ONLY (1<<3) -#define RESET_ORIG_HEAD (1<<4) - -static int reset_head(struct repository *r, struct object_id *oid, const char *action, - const char *switch_to_branch, unsigned flags, - const char *reflog_orig_head, const char *reflog_head, - const char *default_reflog_action) -{ - unsigned detach_head = flags & RESET_HEAD_DETACH; - unsigned reset_hard = flags & RESET_HEAD_HARD; - unsigned run_hook = flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK; - unsigned refs_only = flags & RESET_HEAD_REFS_ONLY; - unsigned update_orig_head = flags & RESET_ORIG_HEAD; - struct object_id head_oid; - struct tree_desc desc[2] = { { NULL }, { NULL } }; - 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, nr = 0; - - if (switch_to_branch && !starts_with(switch_to_branch, "refs/")) - BUG("Not a fully qualified branch: '%s'", switch_to_branch); - - if (!refs_only && repo_hold_locked_index(r, &lock, LOCK_REPORT_ON_ERROR) < 0) { - ret = -1; - goto leave_reset_head; - } - - if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) { - ret = error(_("could not determine HEAD revision")); - goto leave_reset_head; - } - - if (!oid) - oid = &head_oid; - - if (refs_only) - goto reset_head_refs; - - 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 = r->index; - unpack_tree_opts.dst_index = r->index; - unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge; - unpack_tree_opts.update = 1; - unpack_tree_opts.merge = 1; - if (!detach_head) - unpack_tree_opts.reset = 1; - - if (repo_read_index_unmerged(r) < 0) { - ret = error(_("could not read index")); - goto leave_reset_head; - } - - if (!reset_hard && !fill_tree_descriptor(r, &desc[nr++], &head_oid)) { - ret = error(_("failed to find tree of %s"), - oid_to_hex(&head_oid)); - goto leave_reset_head; - } - - if (!fill_tree_descriptor(r, &desc[nr++], oid)) { - ret = error(_("failed to find tree of %s"), oid_to_hex(oid)); - goto leave_reset_head; - } - - if (unpack_trees(nr, desc, &unpack_tree_opts)) { - ret = -1; - goto leave_reset_head; - } - - tree = parse_tree_indirect(oid); - prime_cache_tree(r, r->index, tree); - - if (write_locked_index(r->index, &lock, COMMIT_LOCK) < 0) { - ret = error(_("could not write index")); - goto leave_reset_head; - } - -reset_head_refs: - reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT); - strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : default_reflog_action); - prefix_len = msg.len; - - if (update_orig_head) { - if (!get_oid("ORIG_HEAD", &oid_old_orig)) - old_orig = &oid_old_orig; - if (!get_oid("HEAD", &oid_orig)) { - orig = &oid_orig; - if (!reflog_orig_head) { - strbuf_addstr(&msg, "updating ORIG_HEAD"); - reflog_orig_head = msg.buf; - } - update_ref(reflog_orig_head, "ORIG_HEAD", orig, - old_orig, 0, UPDATE_REFS_MSG_ON_ERR); - } else if (old_orig) - delete_ref(NULL, "ORIG_HEAD", old_orig, 0); - } - - if (!reflog_head) { - strbuf_setlen(&msg, prefix_len); - strbuf_addstr(&msg, "updating HEAD"); - reflog_head = msg.buf; - } - if (!switch_to_branch) - ret = update_ref(reflog_head, "HEAD", oid, orig, - detach_head ? REF_NO_DEREF : 0, - UPDATE_REFS_MSG_ON_ERR); - else { - ret = update_ref(reflog_head, switch_to_branch, oid, - NULL, 0, UPDATE_REFS_MSG_ON_ERR); - if (!ret) - ret = create_symref("HEAD", switch_to_branch, - reflog_head); - } - if (run_hook) - run_hook_le(NULL, "post-checkout", - oid_to_hex(orig ? orig : &null_oid), - oid_to_hex(oid), "1", NULL); - -leave_reset_head: - strbuf_release(&msg); - rollback_lock_file(&lock); - while (nr) - free((void *)desc[--nr].buffer); - return ret; -} - static int move_to_original_branch(struct rebase_options *opts) { struct strbuf orig_head_reflog = STRBUF_INIT, head_reflog = STRBUF_INIT; diff --git a/reset.c b/reset.c new file mode 100644 index 0000000000..79b683bffa --- /dev/null +++ b/reset.c @@ -0,0 +1,140 @@ +#include "git-compat-util.h" +#include "cache-tree.h" +#include "lockfile.h" +#include "refs.h" +#include "reset.h" +#include "run-command.h" +#include "tree-walk.h" +#include "tree.h" +#include "unpack-trees.h" + +int reset_head(struct repository *r, struct object_id *oid, const char *action, + const char *switch_to_branch, unsigned flags, + const char *reflog_orig_head, const char *reflog_head, + const char *default_reflog_action) +{ + unsigned detach_head = flags & RESET_HEAD_DETACH; + unsigned reset_hard = flags & RESET_HEAD_HARD; + unsigned run_hook = flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK; + unsigned refs_only = flags & RESET_HEAD_REFS_ONLY; + unsigned update_orig_head = flags & RESET_ORIG_HEAD; + struct object_id head_oid; + struct tree_desc desc[2] = { { NULL }, { NULL } }; + 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, nr = 0; + + if (switch_to_branch && !starts_with(switch_to_branch, "refs/")) + BUG("Not a fully qualified branch: '%s'", switch_to_branch); + + if (!refs_only && repo_hold_locked_index(r, &lock, LOCK_REPORT_ON_ERROR) < 0) { + ret = -1; + goto leave_reset_head; + } + + if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) { + ret = error(_("could not determine HEAD revision")); + goto leave_reset_head; + } + + if (!oid) + oid = &head_oid; + + if (refs_only) + goto reset_head_refs; + + 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 = r->index; + unpack_tree_opts.dst_index = r->index; + unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge; + unpack_tree_opts.update = 1; + unpack_tree_opts.merge = 1; + if (!detach_head) + unpack_tree_opts.reset = 1; + + if (repo_read_index_unmerged(r) < 0) { + ret = error(_("could not read index")); + goto leave_reset_head; + } + + if (!reset_hard && !fill_tree_descriptor(r, &desc[nr++], &head_oid)) { + ret = error(_("failed to find tree of %s"), + oid_to_hex(&head_oid)); + goto leave_reset_head; + } + + if (!fill_tree_descriptor(r, &desc[nr++], oid)) { + ret = error(_("failed to find tree of %s"), oid_to_hex(oid)); + goto leave_reset_head; + } + + if (unpack_trees(nr, desc, &unpack_tree_opts)) { + ret = -1; + goto leave_reset_head; + } + + tree = parse_tree_indirect(oid); + prime_cache_tree(r, r->index, tree); + + if (write_locked_index(r->index, &lock, COMMIT_LOCK) < 0) { + ret = error(_("could not write index")); + goto leave_reset_head; + } + +reset_head_refs: + reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT); + strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : default_reflog_action); + prefix_len = msg.len; + + if (update_orig_head) { + if (!get_oid("ORIG_HEAD", &oid_old_orig)) + old_orig = &oid_old_orig; + if (!get_oid("HEAD", &oid_orig)) { + orig = &oid_orig; + if (!reflog_orig_head) { + strbuf_addstr(&msg, "updating ORIG_HEAD"); + reflog_orig_head = msg.buf; + } + update_ref(reflog_orig_head, "ORIG_HEAD", orig, + old_orig, 0, UPDATE_REFS_MSG_ON_ERR); + } else if (old_orig) + delete_ref(NULL, "ORIG_HEAD", old_orig, 0); + } + + if (!reflog_head) { + strbuf_setlen(&msg, prefix_len); + strbuf_addstr(&msg, "updating HEAD"); + reflog_head = msg.buf; + } + if (!switch_to_branch) + ret = update_ref(reflog_head, "HEAD", oid, orig, + detach_head ? REF_NO_DEREF : 0, + UPDATE_REFS_MSG_ON_ERR); + else { + ret = update_ref(reflog_head, switch_to_branch, oid, + NULL, 0, UPDATE_REFS_MSG_ON_ERR); + if (!ret) + ret = create_symref("HEAD", switch_to_branch, + reflog_head); + } + if (run_hook) + run_hook_le(NULL, "post-checkout", + oid_to_hex(orig ? orig : &null_oid), + oid_to_hex(oid), "1", NULL); + +leave_reset_head: + strbuf_release(&msg); + rollback_lock_file(&lock); + while (nr) + free((void *)desc[--nr].buffer); + return ret; + +} diff --git a/reset.h b/reset.h new file mode 100644 index 0000000000..12f83c78e2 --- /dev/null +++ b/reset.h @@ -0,0 +1,20 @@ +#ifndef RESET_H +#define RESET_H + +#include "hash.h" +#include "repository.h" + +#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION" + +#define RESET_HEAD_DETACH (1<<0) +#define RESET_HEAD_HARD (1<<1) +#define RESET_HEAD_RUN_POST_CHECKOUT_HOOK (1<<2) +#define RESET_HEAD_REFS_ONLY (1<<3) +#define RESET_ORIG_HEAD (1<<4) + +int reset_head(struct repository *r, struct object_id *oid, const char *action, + const char *switch_to_branch, unsigned flags, + const char *reflog_orig_head, const char *reflog_head, + const char *default_reflog_action); + +#endif -- 2.26.0.159.g23e2136ad0