Hi,
[sorry, Phillip, my reply-all fu deserts me today, apparently.]
On Fri, 18 Oct 2019, Phillip Wood wrote:
> Hi Denton
>
> It's great to see this being libified, I've had it in mind to do this so we
> can avoid forking 'git checkout' in sequencer.c
>
> On 16/10/2019 18:26, Denton Liu wrote:
> > Begin the process of lib-ifying the autostash code. In a future commit,
> >
> > This patch is best viewed with `--color-moved` and
> > `--color-moved-ws=allow-indentation-change`.
> > this will be used to implement `--autostash` in other builtins.
> >
> > Signed-off-by: Denton Liu <liu.den...@gmail.com>
> > ---
> > autostash.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++
> > autostash.h | 12 +++++
> > builtin/rebase.c | 137 -----------------------------------------------
> > 3 files changed, 149 insertions(+), 137 deletions(-)
> >
> > diff --git a/autostash.c b/autostash.c
> > index 62ec7a7c80..eb58e0c8a4 100644
> > --- a/autostash.c
> > +++ b/autostash.c
> > @@ -1,9 +1,17 @@
> > +#define USE_THE_INDEX_COMPATIBILITY_MACROS
>
> It might be nicer to have a preparatory step that fixes this by adding a
> 'struct repository *r' argument to the function in builtin/rebase.c before
> moving the function. You could also do the same for next patch and then move
> both functions together.
In addition to that, I think that `reset_head()`
- should live in its own file, not be hidden in `autostash.c`,
- its default reflog action should _not_ be "rebase".
- ideally be made the working horse of `builtin/reset.c`,
- in addition to that `struct repository *r`, it should probably accept
a `struct index_state *index` and a `const char *worktree_directory`,
but that can easily come in the future, as needed.
Thanks,
Dscho
>
> Best Wishes
>
> Phillip
>
> > +
> > #include "git-compat-util.h"
> > #include "autostash.h"
> > +#include "cache-tree.h"
> > #include "dir.h"
> > #include "gettext.h"
> > +#include "lockfile.h"
> > +#include "refs.h"
> > #include "run-command.h"
> > #include "strbuf.h"
> > +#include "tree-walk.h"
> > +#include "tree.h"
> > +#include "unpack-trees.h"
> >
> > int read_one(const char *path, struct strbuf *buf)
> > {
> > @@ -13,6 +21,135 @@ int read_one(const char *path, struct strbuf *buf)
> > return 0;
> > }
> >
> > +int reset_head(struct object_id *oid, const char *action,
> > + const char *switch_to_branch, unsigned flags,
> > + const char *reflog_orig_head, const char *reflog_head)
> > +{
> > + 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 && hold_locked_index(&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 = the_repository->index;
> > + unpack_tree_opts.dst_index = the_repository->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(the_repository) < 0) {
> > + ret = error(_("could not read index"));
> > + goto leave_reset_head;
> > + }
> > +
> > + if (!reset_hard && !fill_tree_descriptor(the_repository, &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(the_repository, &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(the_repository, the_repository->index, tree);
> > +
> > + if (write_locked_index(the_repository->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 : "rebase");
> > + 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;
> > +}
> > +
> > int apply_autostash(const char *path)
> > {
> > struct strbuf autostash = STRBUF_INIT;
> > diff --git a/autostash.h b/autostash.h
> > index 5f4e4bd22c..1406638166 100644
> > --- a/autostash.h
> > +++ b/autostash.h
> > @@ -6,6 +6,18 @@
> > /* Read one file, then strip line endings */
> > int read_one(const char *path, struct strbuf *buf);
> >
> > +#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 object_id *oid, const char *action,
> > + const char *switch_to_branch, unsigned flags,
> > + const char *reflog_orig_head, const char *reflog_head);
> > +
> > int apply_autostash(const char *path);
> >
> > #endif
> > diff --git a/builtin/rebase.c b/builtin/rebase.c
> > index 661928d427..c3165896cc 100644
> > --- a/builtin/rebase.c
> > +++ b/builtin/rebase.c
> > @@ -734,143 +734,6 @@ 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 object_id *oid, const char *action,
> > - const char *switch_to_branch, unsigned flags,
> > - const char *reflog_orig_head, const char *reflog_head)
> > -{
> > - 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 && hold_locked_index(&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 = the_repository->index;
> > - unpack_tree_opts.dst_index = the_repository->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(the_repository) < 0) {
> > - ret = error(_("could not read index"));
> > - goto leave_reset_head;
> > - }
> > -
> > - if (!reset_hard && !fill_tree_descriptor(the_repository, &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(the_repository, &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(the_repository, the_repository->index, tree);
> > -
> > - if (write_locked_index(the_repository->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 : "rebase");
> > - 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;
> >
>
