[PATCH v8 2/7] builtin/replay: move core logic into "libgit.a"
- From
Patrick Steinhardt <ps@pks.im>
- Date
- Jan 7, 2026, 10:10 UTC
- Message-ID
- <20260107-b4-pks-history-builtin-v8-2-18e9779e3a26@pks.im>
- In-Reply-To
- <20260107-b4-pks-history-builtin-v8-0-18e9779e3a26@pks.im>
Move the core logic used to replay commits into "libgit.a" so that it can be easily reused by other commands. It will be used in a subsequent commit where we're about to introduce a new git-history(1) command.
Note that with this change we have no sign-comparison warnings anymore, and neither do we depend on `the_repository`.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- Makefile | 1 + builtin/replay.c | 358 +------------------------------------------------------ meson.build | 1 + replay.c | 347 +++++++++++++++++++++++++++++++++++++++++++++++++++++ replay.h | 61 ++++++++++ 5 files changed, 411 insertions(+), 357 deletions(-)
diff --git a/Makefile b/Makefile index b7eba509c6..1c64a5d2ae 100644 --- a/Makefile +++ b/Makefile @@ -1285,6 +1285,7 @@ LIB_OBJS += repack-geometry.o LIB_OBJS += repack-midx.o LIB_OBJS += repack-promisor.o LIB_OBJS += replace-object.o +LIB_OBJS += replay.o LIB_OBJS += repo-settings.o LIB_OBJS += repository.o LIB_OBJS += rerere.o diff --git a/builtin/replay.c b/builtin/replay.c index d7523fdbc2..24f0b5f050 100644 --- a/builtin/replay.c +++ b/builtin/replay.c @@ -2,257 +2,22 @@ * "git replay" builtin command */ -#define USE_THE_REPOSITORY_VARIABLE -#define DISABLE_SIGN_COMPARE_WARNINGS - #include "git-compat-util.h" #include "builtin.h" #include "config.h" -#include "environment.h" #include "hex.h" -#include "lockfile.h" -#include "merge-ort.h" #include "object-name.h" #include "parse-options.h" #include "refs.h" +#include "replay.h" #include "revision.h" -#include "strmap.h" -#include <oidset.h> -#include <tree.h> enum ref_action_mode { REF_ACTION_UPDATE, REF_ACTION_PRINT, }; -static const char *short_commit_name(struct repository *repo, - struct commit *commit) -{ - return repo_find_unique_abbrev(repo, &commit->object.oid, - DEFAULT_ABBREV); -} - -static struct commit *peel_committish(struct repository *repo, - const char *name, - const char *mode) -{ - struct object *obj; - struct object_id oid; - - if (repo_get_oid(repo, name, &oid)) - die(_("'%s' is not a valid commit-ish for %s"), name, mode); - obj = parse_object_or_die(repo, &oid, name); - return (struct commit *)repo_peel_to_type(repo, name, 0, obj, - OBJ_COMMIT); -} - -static char *get_author(const char *message) -{ - size_t len; - const char *a; - - a = find_commit_header(message, "author", &len); - if (a) - return xmemdupz(a, len); - - return NULL; -} - -static struct commit *create_commit(struct repository *repo, - struct tree *tree, - struct commit *based_on, - struct commit *parent) -{ - struct object_id ret; - struct object *obj = NULL; - struct commit_list *parents = NULL; - char *author; - char *sign_commit = NULL; /* FIXME: cli users might want to sign again */ - struct commit_extra_header *extra = NULL; - struct strbuf msg = STRBUF_INIT; - const char *out_enc = get_commit_output_encoding(); - const char *message = repo_logmsg_reencode(repo, based_on, - NULL, out_enc); - const char *orig_message = NULL; - const char *exclude_gpgsig[] = { "gpgsig", "gpgsig-sha256", NULL }; - - commit_list_insert(parent, &parents); - extra = read_commit_extra_headers(based_on, exclude_gpgsig); - find_commit_subject(message, &orig_message); - strbuf_addstr(&msg, orig_message); - author = get_author(message); - reset_ident_date(); - if (commit_tree_extended(msg.buf, msg.len, &tree->object.oid, parents, - &ret, author, NULL, sign_commit, extra)) { - error(_("failed to write commit object")); - goto out; - } - - obj = parse_object(repo, &ret); - -out: - repo_unuse_commit_buffer(the_repository, based_on, message); - free_commit_extra_headers(extra); - free_commit_list(parents); - strbuf_release(&msg); - free(author); - return (struct commit *)obj; -} - -struct ref_info { - struct commit *onto; - struct strset positive_refs; - struct strset negative_refs; - int positive_refexprs; - int negative_refexprs; -}; - -static void get_ref_information(struct repository *repo, - struct rev_cmdline_info *cmd_info, - struct ref_info *ref_info) -{ - int i; - - ref_info->onto = NULL; - strset_init(&ref_info->positive_refs); - strset_init(&ref_info->negative_refs); - ref_info->positive_refexprs = 0; - ref_info->negative_refexprs = 0; - - /* - * When the user specifies e.g. - * git replay origin/main..mybranch - * git replay ^origin/next mybranch1 mybranch2 - * we want to be able to determine where to replay the commits. In - * these examples, the branches are probably based on an old version - * of either origin/main or origin/next, so we want to replay on the - * newest version of that branch. In contrast we would want to error - * out if they ran - * git replay ^origin/master ^origin/next mybranch - * git replay mybranch~2..mybranch - * the first of those because there's no unique base to choose, and - * the second because they'd likely just be replaying commits on top - * of the same commit and not making any difference. - */ - for (i = 0; i < cmd_info->nr; i++) { - struct rev_cmdline_entry *e = cmd_info->rev + i; - struct object_id oid; - const char *refexpr = e->name; - char *fullname = NULL; - int can_uniquely_dwim = 1; - - if (*refexpr == '^') - refexpr++; - if (repo_dwim_ref(repo, refexpr, strlen(refexpr), &oid, &fullname, 0) != 1) - can_uniquely_dwim = 0; - - if (e->flags & BOTTOM) { - if (can_uniquely_dwim) - strset_add(&ref_info->negative_refs, fullname); - if (!ref_info->negative_refexprs) - ref_info->onto = lookup_commit_reference_gently(repo, - &e->item->oid, 1); - ref_info->negative_refexprs++; - } else { - if (can_uniquely_dwim) - strset_add(&ref_info->positive_refs, fullname); - ref_info->positive_refexprs++; - } - - free(fullname); - } -} - -static void set_up_replay_mode(struct repository *repo, - struct rev_cmdline_info *cmd_info, - const char *onto_name, - char **advance_name, - struct commit **onto, - struct strset **update_refs) -{ - struct ref_info rinfo; - - get_ref_information(repo, cmd_info, &rinfo); - if (!rinfo.positive_refexprs) - die(_("need some commits to replay")); - - die_for_incompatible_opt2(!!onto_name, "--onto", - !!*advance_name, "--advance"); - if (onto_name) { - *onto = peel_committish(repo, onto_name, "--onto"); - if (rinfo.positive_refexprs < - strset_get_size(&rinfo.positive_refs)) - die(_("all positive revisions given must be references")); - *update_refs = xcalloc(1, sizeof(**update_refs)); - **update_refs = rinfo.positive_refs; - memset(&rinfo.positive_refs, 0, sizeof(**update_refs)); - } else { - struct object_id oid; - char *fullname = NULL; - - if (!*advance_name) - BUG("expected either onto_name or *advance_name in this function"); - - if (repo_dwim_ref(repo, *advance_name, strlen(*advance_name), - &oid, &fullname, 0) == 1) { - free(*advance_name); - *advance_name = fullname; - } else { - die(_("argument to --advance must be a reference")); - } - *onto = peel_committish(repo, *advance_name, "--advance"); - if (rinfo.positive_refexprs > 1) - die(_("cannot advance target with multiple sources because ordering would be ill-defined")); - } - strset_clear(&rinfo.negative_refs); - strset_clear(&rinfo.positive_refs); -} - -static struct commit *mapped_commit(kh_oid_map_t *replayed_commits, - struct commit *commit, - struct commit *fallback) -{ - khint_t pos = kh_get_oid_map(replayed_commits, commit->object.oid); - if (pos == kh_end(replayed_commits)) - return fallback; - return kh_value(replayed_commits, pos); -} - -static struct commit *pick_regular_commit(struct repository *repo, - struct commit *pickme, - kh_oid_map_t *replayed_commits, - struct commit *onto, - struct merge_options *merge_opt, - struct merge_result *result) -{ - struct commit *base, *replayed_base; - struct tree *pickme_tree, *base_tree; - - base = pickme->parents->item; - replayed_base = mapped_commit(replayed_commits, base, onto); - - result->tree = repo_get_commit_tree(repo, replayed_base); - pickme_tree = repo_get_commit_tree(repo, pickme); - base_tree = repo_get_commit_tree(repo, base); - - merge_opt->branch1 = short_commit_name(repo, replayed_base); - merge_opt->branch2 = short_commit_name(repo, pickme); - merge_opt->ancestor = xstrfmt("parent of %s", merge_opt->branch2); - - merge_incore_nonrecursive(merge_opt, - base_tree, - result->tree, - pickme_tree, - result); - - free((char*)merge_opt->ancestor); - merge_opt->ancestor = NULL; - if (!result->clean) - return NULL; - return create_commit(repo, result->tree, pickme, replayed_base); -} - static enum ref_action_mode parse_ref_action_mode(const char *ref_action, const char *source) { if (!ref_action || !strcmp(ref_action, "update")) @@ -278,127 +43,6 @@ static enum ref_action_mode get_ref_action_mode(struct repository *repo, const c return REF_ACTION_UPDATE; } -struct replay_revisions_options { - const char *advance; - const char *onto; - int contained; -}; - -struct replay_ref_updates { - struct replay_ref_update { - char *refname; - struct object_id old_oid; - struct object_id new_oid; - } *items; - size_t nr, alloc; -}; - -static void replay_ref_updates_release(struct replay_ref_updates *updates) -{ - for (size_t i = 0; i < updates->nr; i++) - free(updates->items[i].refname); - free(updates->items); -} - -static int replay_revisions(struct repository *repo, struct rev_info *revs, - struct replay_revisions_options *opts, - struct replay_ref_updates *updates) -{ - kh_oid_map_t *replayed_commits = NULL; - struct strset *update_refs = NULL; - struct commit *last_commit = NULL; - struct commit *commit; - struct commit *onto = NULL; - struct merge_options merge_opt; - struct merge_result result; - char *advance; - int ret; - - advance = xstrdup_or_null(opts->advance); - set_up_replay_mode(repo, &revs->cmdline, opts->onto, &advance, - &onto, &update_refs); - - /* FIXME: Should allow replaying commits with the first as a root commit */ - - if (prepare_revision_walk(revs) < 0) { - ret = error(_("error preparing revisions")); - goto out; - } - - init_basic_merge_options(&merge_opt, repo); - memset(&result, 0, sizeof(result)); - merge_opt.show_rename_progress = 0; - last_commit = onto; - replayed_commits = kh_init_oid_map(); - while ((commit = get_revision(revs))) { - const struct name_decoration *decoration; - khint_t pos; - int hr; - - if (!commit->parents) - die(_("replaying down from root commit is not supported yet!")); - if (commit->parents->next) - die(_("replaying merge commits is not supported yet!")); - - last_commit = pick_regular_commit(repo, commit, replayed_commits, - onto, &merge_opt, &result); - if (!last_commit) - break; - - /* Record commit -> last_commit mapping */ - pos = kh_put_oid_map(replayed_commits, commit->object.oid, &hr); - if (hr == 0) - BUG("Duplicate rewritten commit: %s\n", - oid_to_hex(&commit->object.oid)); - kh_value(replayed_commits, pos) = last_commit; - - /* Update any necessary branches */ - if (advance) - continue; - decoration = get_name_decoration(&commit->object); - if (!decoration) - continue; - while (decoration) { - if (decoration->type == DECORATION_REF_LOCAL && - (opts->contained || strset_contains(update_refs, - decoration->name))) { - ALLOC_GROW(updates->items, updates->nr + 1, updates->alloc); - updates->items[updates->nr].refname = xstrdup(decoration->name); - updates->items[updates->nr].old_oid = commit->object.oid; - updates->items[updates->nr].new_oid = last_commit->object.oid; - updates->nr++; - } - decoration = decoration->next; - } - } - - if (!result.clean) { - ret = -1; - goto out; - } - - /* In --advance mode, advance the target ref */ - if (advance) { - ALLOC_GROW(updates->items, updates->nr + 1, updates->alloc); - updates->items[updates->nr].refname = xstrdup(advance); - updates->items[updates->nr].old_oid = onto->object.oid; - updates->items[updates->nr].new_oid = last_commit->object.oid; - updates->nr++; - } - - ret = 0; - -out: - if (update_refs) { - strset_clear(update_refs); - free(update_refs); - } - kh_destroy_oid_map(replayed_commits); - merge_finalize(&merge_opt, &result); - free(advance); - return ret; -} - static int handle_ref_update(enum ref_action_mode mode, struct ref_transaction *transaction, const char *refname, diff --git a/meson.build b/meson.build index dd52efd1c8..a5a4e99b25 100644 --- a/meson.build +++ b/meson.build @@ -471,6 +471,7 @@ libgit_sources = [ 'repack-midx.c', 'repack-promisor.c', 'replace-object.c', + 'replay.c', 'repo-settings.c', 'repository.c', 'rerere.c', diff --git a/replay.c b/replay.c new file mode 100644 index 0000000000..1926fca4b9 --- /dev/null +++ b/replay.c @@ -0,0 +1,347 @@ +#define USE_THE_REPOSITORY_VARIABLE +#define DISABLE_SIGN_COMPARE_WARNINGS + +#include "git-compat-util.h" +#include "environment.h" +#include "hex.h" +#include "merge-ort.h" +#include "object-name.h" +#include "oidset.h" +#include "parse-options.h" +#include "refs.h" +#include "replay.h" +#include "revision.h" +#include "tree.h" + +static const char *short_commit_name(struct repository *repo, + struct commit *commit) +{ + return repo_find_unique_abbrev(repo, &commit->object.oid, + DEFAULT_ABBREV); +} + +static struct commit *peel_committish(struct repository *repo, + const char *name, + const char *mode) +{ + struct object *obj; + struct object_id oid; + + if (repo_get_oid(repo, name, &oid)) + die(_("'%s' is not a valid commit-ish for %s"), name, mode); + obj = parse_object_or_die(repo, &oid, name); + return (struct commit *)repo_peel_to_type(repo, name, 0, obj, + OBJ_COMMIT); +} + +static char *get_author(const char *message) +{ + size_t len; + const char *a; + + a = find_commit_header(message, "author", &len); + if (a) + return xmemdupz(a, len); + + return NULL; +} + +static struct commit *create_commit(struct repository *repo, + struct tree *tree, + struct commit *based_on, + struct commit *parent) +{ + struct object_id ret; + struct object *obj = NULL; + struct commit_list *parents = NULL; + char *author; + char *sign_commit = NULL; /* FIXME: cli users might want to sign again */ + struct commit_extra_header *extra = NULL; + struct strbuf msg = STRBUF_INIT; + const char *out_enc = get_commit_output_encoding(); + const char *message = repo_logmsg_reencode(repo, based_on, + NULL, out_enc); + const char *orig_message = NULL; + const char *exclude_gpgsig[] = { "gpgsig", "gpgsig-sha256", NULL }; + + commit_list_insert(parent, &parents); + extra = read_commit_extra_headers(based_on, exclude_gpgsig); + find_commit_subject(message, &orig_message); + strbuf_addstr(&msg, orig_message); + author = get_author(message); + reset_ident_date(); + if (commit_tree_extended(msg.buf, msg.len, &tree->object.oid, parents, + &ret, author, NULL, sign_commit, extra)) { + error(_("failed to write commit object")); + goto out; + } + + obj = parse_object(repo, &ret); + +out: + repo_unuse_commit_buffer(the_repository, based_on, message); + free_commit_extra_headers(extra); + free_commit_list(parents); + strbuf_release(&msg); + free(author); + return (struct commit *)obj; +} + +struct ref_info { + struct commit *onto; + struct strset positive_refs; + struct strset negative_refs; + int positive_refexprs; + int negative_refexprs; +}; + +static void get_ref_information(struct repository *repo, + struct rev_cmdline_info *cmd_info, + struct ref_info *ref_info) +{ + int i; + + ref_info->onto = NULL; + strset_init(&ref_info->positive_refs); + strset_init(&ref_info->negative_refs); + ref_info->positive_refexprs = 0; + ref_info->negative_refexprs = 0; + + /* + * When the user specifies e.g. + * git replay origin/main..mybranch + * git replay ^origin/next mybranch1 mybranch2 + * we want to be able to determine where to replay the commits. In + * these examples, the branches are probably based on an old version + * of either origin/main or origin/next, so we want to replay on the + * newest version of that branch. In contrast we would want to error + * out if they ran + * git replay ^origin/master ^origin/next mybranch + * git replay mybranch~2..mybranch + * the first of those because there's no unique base to choose, and + * the second because they'd likely just be replaying commits on top + * of the same commit and not making any difference. + */ + for (i = 0; i < cmd_info->nr; i++) { + struct rev_cmdline_entry *e = cmd_info->rev + i; + struct object_id oid; + const char *refexpr = e->name; + char *fullname = NULL; + int can_uniquely_dwim = 1; + + if (*refexpr == '^') + refexpr++; + if (repo_dwim_ref(repo, refexpr, strlen(refexpr), &oid, &fullname, 0) != 1) + can_uniquely_dwim = 0; + + if (e->flags & BOTTOM) { + if (can_uniquely_dwim) + strset_add(&ref_info->negative_refs, fullname); + if (!ref_info->negative_refexprs) + ref_info->onto = lookup_commit_reference_gently(repo, + &e->item->oid, 1); + ref_info->negative_refexprs++; + } else { + if (can_uniquely_dwim) + strset_add(&ref_info->positive_refs, fullname); + ref_info->positive_refexprs++; + } + + free(fullname); + } +} + +static void set_up_replay_mode(struct repository *repo, + struct rev_cmdline_info *cmd_info, + const char *onto_name, + char **advance_name, + struct commit **onto, + struct strset **update_refs) +{ + struct ref_info rinfo; + + get_ref_information(repo, cmd_info, &rinfo); + if (!rinfo.positive_refexprs) + die(_("need some commits to replay")); + + die_for_incompatible_opt2(!!onto_name, "--onto", + !!*advance_name, "--advance"); + if (onto_name) { + *onto = peel_committish(repo, onto_name, "--onto"); + if (rinfo.positive_refexprs < + strset_get_size(&rinfo.positive_refs)) + die(_("all positive revisions given must be references")); + *update_refs = xcalloc(1, sizeof(**update_refs)); + **update_refs = rinfo.positive_refs; + memset(&rinfo.positive_refs, 0, sizeof(**update_refs)); + } else { + struct object_id oid; + char *fullname = NULL; + + if (!*advance_name) + BUG("expected either onto_name or *advance_name in this function"); + + if (repo_dwim_ref(repo, *advance_name, strlen(*advance_name), + &oid, &fullname, 0) == 1) { + free(*advance_name); + *advance_name = fullname; + } else { + die(_("argument to --advance must be a reference")); + } + *onto = peel_committish(repo, *advance_name, "--advance"); + if (rinfo.positive_refexprs > 1) + die(_("cannot advance target with multiple sources because ordering would be ill-defined")); + } + strset_clear(&rinfo.negative_refs); + strset_clear(&rinfo.positive_refs); +} + +static struct commit *mapped_commit(kh_oid_map_t *replayed_commits, + struct commit *commit, + struct commit *fallback) +{ + khint_t pos = kh_get_oid_map(replayed_commits, commit->object.oid); + if (pos == kh_end(replayed_commits)) + return fallback; + return kh_value(replayed_commits, pos); +} + +static struct commit *pick_regular_commit(struct repository *repo, + struct commit *pickme, + kh_oid_map_t *replayed_commits, + struct commit *onto, + struct merge_options *merge_opt, + struct merge_result *result) +{ + struct commit *base, *replayed_base; + struct tree *pickme_tree, *base_tree; + + base = pickme->parents->item; + replayed_base = mapped_commit(replayed_commits, base, onto); + + result->tree = repo_get_commit_tree(repo, replayed_base); + pickme_tree = repo_get_commit_tree(repo, pickme); + base_tree = repo_get_commit_tree(repo, base); + + merge_opt->branch1 = short_commit_name(repo, replayed_base); + merge_opt->branch2 = short_commit_name(repo, pickme); + merge_opt->ancestor = xstrfmt("parent of %s", merge_opt->branch2); + + merge_incore_nonrecursive(merge_opt, + base_tree, + result->tree, + pickme_tree, + result); + + free((char*)merge_opt->ancestor); + merge_opt->ancestor = NULL; + if (!result->clean) + return NULL; + return create_commit(repo, result->tree, pickme, replayed_base); +} + +void replay_ref_updates_release(struct replay_ref_updates *updates) +{ + for (size_t i = 0; i < updates->nr; i++) + free(updates->items[i].refname); + free(updates->items); +} + +int replay_revisions(struct repository *repo, struct rev_info *revs, + struct replay_revisions_options *opts, + struct replay_ref_updates *updates) +{ + kh_oid_map_t *replayed_commits = NULL; + struct strset *update_refs = NULL; + struct commit *last_commit = NULL; + struct commit *commit; + struct commit *onto = NULL; + struct merge_options merge_opt; + struct merge_result result; + char *advance; + int ret; + + advance = xstrdup_or_null(opts->advance); + set_up_replay_mode(repo, &revs->cmdline, opts->onto, &advance, + &onto, &update_refs); + + /* FIXME: Should allow replaying commits with the first as a root commit */ + + if (prepare_revision_walk(revs) < 0) { + ret = error(_("error preparing revisions")); + goto out; + } + + init_basic_merge_options(&merge_opt, repo); + memset(&result, 0, sizeof(result)); + merge_opt.show_rename_progress = 0; + last_commit = onto; + replayed_commits = kh_init_oid_map(); + while ((commit = get_revision(revs))) { + const struct name_decoration *decoration; + khint_t pos; + int hr; + + if (!commit->parents) + die(_("replaying down from root commit is not supported yet!")); + if (commit->parents->next) + die(_("replaying merge commits is not supported yet!")); + + last_commit = pick_regular_commit(repo, commit, replayed_commits, + onto, &merge_opt, &result); + if (!last_commit) + break; + + /* Record commit -> last_commit mapping */ + pos = kh_put_oid_map(replayed_commits, commit->object.oid, &hr); + if (hr == 0) + BUG("Duplicate rewritten commit: %s\n", + oid_to_hex(&commit->object.oid)); + kh_value(replayed_commits, pos) = last_commit; + + /* Update any necessary branches */ + if (advance) + continue; + decoration = get_name_decoration(&commit->object); + if (!decoration) + continue; + while (decoration) { + if (decoration->type == DECORATION_REF_LOCAL && + (opts->contained || strset_contains(update_refs, + decoration->name))) { + ALLOC_GROW(updates->items, updates->nr + 1, updates->alloc); + updates->items[updates->nr].refname = xstrdup(decoration->name); + updates->items[updates->nr].old_oid = commit->object.oid; + updates->items[updates->nr].new_oid = last_commit->object.oid; + updates->nr++; + } + decoration = decoration->next; + } + } + + if (!result.clean) { + ret = -1; + goto out; + } + + /* In --advance mode, advance the target ref */ + if (advance) { + ALLOC_GROW(updates->items, updates->nr + 1, updates->alloc); + updates->items[updates->nr].refname = xstrdup(advance); + updates->items[updates->nr].old_oid = onto->object.oid; + updates->items[updates->nr].new_oid = last_commit->object.oid; + updates->nr++; + } + + ret = 0; + +out: + if (update_refs) { + strset_clear(update_refs); + free(update_refs); + } + kh_destroy_oid_map(replayed_commits); + merge_finalize(&merge_opt, &result); + free(advance); + return ret; +} diff --git a/replay.h b/replay.h new file mode 100644 index 0000000000..bc7a321a5e --- /dev/null +++ b/replay.h @@ -0,0 +1,61 @@ +#ifndef REPLAY_H +#define REPLAY_H + +#include "hash.h" + +struct repository; +struct rev_info; + +/* + * A set of options that can be passed to `replay_revisions()`. + */ +struct replay_revisions_options { + /* + * Starting point at which to create the new commits; must be a branch + * name. The branch will be updated to point to the rewritten commits. + * This option is mutually exclusive with `onto`. + */ + const char *advance; + + /* + * Starting point at which to create the new commits; must be a + * committish. References pointing at decendants of `onto` will be + * updated to point to the new commits. + */ + const char *onto; + + /* + * Update branches that point at commits in the given revision range. + * Requires `onto` to be set. + */ + int contained; +}; + +/* This struct is used as an out-parameter by `replay_revisions()`. */ +struct replay_ref_updates { + /* + * The set of reference updates that are caused by replaying the + * commits. + */ + struct replay_ref_update { + char *refname; + struct object_id old_oid; + struct object_id new_oid; + } *items; + size_t nr, alloc; +}; + +void replay_ref_updates_release(struct replay_ref_updates *updates); + +/* + * Replay a set of commits onto a new location. Leaves both the working tree, + * index and references untouched. Reference updates caused by the replay will + * be recorded in the `updates` out pointer. + * + * Returns 0 on success, a negative error code otherwise. + */ +int replay_revisions(struct repository *repo, struct rev_info *revs, + struct replay_revisions_options *opts, + struct replay_ref_updates *updates); + +#endif
-- 2.52.0.542.g9473a8513b.dirty