diff options
author | Michael Haggerty <mhagger@alum.mit.edu> | 2017-04-16 09:41:26 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2017-04-17 07:32:45 +0300 |
commit | b05855b5bcaf07fe8a636e621bd9d12d51963b5a (patch) | |
tree | 01832b86c7e5bf8defc66694362bddd561c8bdab | |
parent | e121b9cb5f358c9779e02a2bf96fc545a896ab13 (diff) |
refs_verify_refname_available(): implement once for all backends
It turns out that we can now implement
`refs_verify_refname_available()` based on the other virtual
functions, so there is no need for it to be defined at the backend
level. Instead, define it once in `refs.c` and remove the
`files_backend` definition.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r-- | refs.c | 85 | ||||
-rw-r--r-- | refs.h | 2 | ||||
-rw-r--r-- | refs/files-backend.c | 39 | ||||
-rw-r--r-- | refs/refs-internal.h | 7 |
4 files changed, 92 insertions, 41 deletions
@@ -5,6 +5,7 @@ #include "cache.h" #include "hashmap.h" #include "lockfile.h" +#include "iterator.h" #include "refs.h" #include "refs/refs-internal.h" #include "object.h" @@ -1658,11 +1659,91 @@ int ref_transaction_commit(struct ref_transaction *transaction, int refs_verify_refname_available(struct ref_store *refs, const char *refname, - const struct string_list *extra, + const struct string_list *extras, const struct string_list *skip, struct strbuf *err) { - return refs->be->verify_refname_available(refs, refname, extra, skip, err); + const char *slash; + const char *extra_refname; + struct strbuf dirname = STRBUF_INIT; + struct strbuf referent = STRBUF_INIT; + struct object_id oid; + unsigned int type; + struct ref_iterator *iter; + int ok; + int ret = -1; + + /* + * For the sake of comments in this function, suppose that + * refname is "refs/foo/bar". + */ + + assert(err); + + strbuf_grow(&dirname, strlen(refname) + 1); + for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) { + /* Expand dirname to the new prefix, not including the trailing slash: */ + strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len); + + /* + * We are still at a leading dir of the refname (e.g., + * "refs/foo"; if there is a reference with that name, + * it is a conflict, *unless* it is in skip. + */ + if (skip && string_list_has_string(skip, dirname.buf)) + continue; + + if (!refs_read_raw_ref(refs, dirname.buf, oid.hash, &referent, &type)) { + strbuf_addf(err, "'%s' exists; cannot create '%s'", + dirname.buf, refname); + goto cleanup; + } + + if (extras && string_list_has_string(extras, dirname.buf)) { + strbuf_addf(err, "cannot process '%s' and '%s' at the same time", + refname, dirname.buf); + goto cleanup; + } + } + + /* + * We are at the leaf of our refname (e.g., "refs/foo/bar"). + * There is no point in searching for a reference with that + * name, because a refname isn't considered to conflict with + * itself. But we still need to check for references whose + * names are in the "refs/foo/bar/" namespace, because they + * *do* conflict. + */ + strbuf_addstr(&dirname, refname + dirname.len); + strbuf_addch(&dirname, '/'); + + iter = refs_ref_iterator_begin(refs, dirname.buf, 0, + DO_FOR_EACH_INCLUDE_BROKEN); + while ((ok = ref_iterator_advance(iter)) == ITER_OK) { + if (skip && + string_list_has_string(skip, iter->refname)) + continue; + + strbuf_addf(err, "'%s' exists; cannot create '%s'", + iter->refname, refname); + ref_iterator_abort(iter); + goto cleanup; + } + + if (ok != ITER_DONE) + die("BUG: error while iterating over references"); + + extra_refname = find_descendant_ref(dirname.buf, extras, skip); + if (extra_refname) + strbuf_addf(err, "cannot process '%s' and '%s' at the same time", + refname, extra_refname); + else + ret = 0; + +cleanup: + strbuf_release(&referent); + strbuf_release(&dirname); + return ret; } int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data) @@ -97,7 +97,7 @@ int read_ref(const char *refname, unsigned char *sha1); int refs_verify_refname_available(struct ref_store *refs, const char *refname, - const struct string_list *extra, + const struct string_list *extras, const struct string_list *skip, struct strbuf *err); diff --git a/refs/files-backend.c b/refs/files-backend.c index 2a0538dea7..4185025efa 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -1724,10 +1724,9 @@ retry: goto error_return; } else if (remove_dir_recursively(&ref_file, REMOVE_DIR_EMPTY_ONLY)) { - if (verify_refname_available_dir( - refname, extras, skip, - get_loose_refs(refs), - err)) { + if (refs_verify_refname_available( + &refs->base, refname, + extras, skip, err)) { /* * The error message set by * verify_refname_available() is OK. @@ -2094,9 +2093,9 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, */ if (remove_empty_directories(&ref_file)) { last_errno = errno; - if (!verify_refname_available_dir( - refname, extras, skip, - get_loose_refs(refs), err)) + if (!refs_verify_refname_available( + &refs->base, + refname, extras, skip, err)) strbuf_addf(err, "there are still refs under '%s'", refname); goto error_return; @@ -2108,9 +2107,8 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs, if (!resolved) { last_errno = errno; if (last_errno != ENOTDIR || - !verify_refname_available_dir( - refname, extras, skip, - get_loose_refs(refs), err)) + !refs_verify_refname_available(&refs->base, refname, + extras, skip, err)) strbuf_addf(err, "unable to resolve reference '%s': %s", refname, strerror(last_errno)); @@ -2606,26 +2604,6 @@ static int rename_tmp_log(struct files_ref_store *refs, const char *newrefname) return ret; } -static int files_verify_refname_available(struct ref_store *ref_store, - const char *newname, - const struct string_list *extras, - const struct string_list *skip, - struct strbuf *err) -{ - struct files_ref_store *refs = - files_downcast(ref_store, REF_STORE_READ, "verify_refname_available"); - struct ref_dir *packed_refs = get_packed_refs(refs); - struct ref_dir *loose_refs = get_loose_refs(refs); - - if (verify_refname_available_dir(newname, extras, skip, - packed_refs, err) || - verify_refname_available_dir(newname, extras, skip, - loose_refs, err)) - return -1; - - return 0; -} - static int write_ref_to_lockfile(struct ref_lock *lock, const unsigned char *sha1, struct strbuf *err); static int commit_ref_update(struct files_ref_store *refs, @@ -4288,7 +4266,6 @@ struct ref_storage_be refs_be_files = { files_ref_iterator_begin, files_read_raw_ref, - files_verify_refname_available, files_reflog_iterator_begin, files_for_each_reflog_ent, diff --git a/refs/refs-internal.h b/refs/refs-internal.h index 545989ae7f..3d46131efb 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -590,12 +590,6 @@ typedef int read_raw_ref_fn(struct ref_store *ref_store, const char *refname, unsigned char *sha1, struct strbuf *referent, unsigned int *type); -typedef int verify_refname_available_fn(struct ref_store *ref_store, - const char *newname, - const struct string_list *extras, - const struct string_list *skip, - struct strbuf *err); - struct ref_storage_be { struct ref_storage_be *next; const char *name; @@ -612,7 +606,6 @@ struct ref_storage_be { ref_iterator_begin_fn *iterator_begin; read_raw_ref_fn *read_raw_ref; - verify_refname_available_fn *verify_refname_available; reflog_iterator_begin_fn *reflog_iterator_begin; for_each_reflog_ent_fn *for_each_reflog_ent; |