git/refs, branch v2.20.2

Merge branch 'nd/per-worktree-ref-iteration'

2018-11-26T14:13:43Z

Build fix. * nd/per-worktree-ref-iteration: files-backend.c: fix build error on Solaris

files-backend.c: fix build error on Solaris

2018-11-26T06:22:58Z

This function files_reflog_path returns void, which usually means "return;" not returning "void value" from another function. Reported-by: Ævar Arnfjörð Bjarmason Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

Merge branch 'nd/per-worktree-ref-iteration'

2018-11-13T13:37:26Z

The code to traverse objects for reachability, used to decide what objects are unreferenced and expendable, have been taught to also consider per-worktree refs of other worktrees as starting points to prevent data loss. * nd/per-worktree-ref-iteration: git-worktree.txt: correct linkgit command name reflog expire: cover reflog from all worktrees fsck: check HEAD and reflog from other worktrees fsck: move fsck_head_link() to get_default_heads() to avoid some globals revision.c: better error reporting on ref from different worktrees revision.c: correct a parameter name refs: new ref types to make per-worktree refs visible to all worktrees Add a place for (not) sharing stuff between worktrees refs.c: indent with tabs, not spaces

Merge branch 'bc/hash-transition-part-15'

2018-10-30T06:43:42Z

More codepaths are moving away from hardcoded hash sizes. * bc/hash-transition-part-15: rerere: convert to use the_hash_algo submodule: make zero-oid comparison hash function agnostic apply: rename new_sha1_prefix and old_sha1_prefix apply: replace hard-coded constants tag: express constant in terms of the_hash_algo transport: use parse_oid_hex instead of a constant upload-pack: express constants in terms of the_hash_algo refs/packed-backend: express constants using the_hash_algo packfile: express constants in terms of the_hash_algo pack-revindex: express constants in terms of the_hash_algo builtin/fetch-pack: remove constants with parse_oid_hex builtin/mktree: remove hard-coded constant builtin/repack: replace hard-coded constants pack-bitmap-write: use GIT_MAX_RAWSZ for allocation object_id.cocci: match only expressions of type 'struct object_id'

refs: new ref types to make per-worktree refs visible to all worktrees

2018-10-22T04:32:29Z

One of the problems with multiple worktree is accessing per-worktree refs of one worktree from another worktree. This was sort of solved by multiple ref store, where the code can open the ref store of another worktree and has access to the ref space of that worktree. The problem with this is reporting. "HEAD" in another ref space is also called "HEAD" like in the current ref space. In order to differentiate them, all the code must somehow carry the ref store around and print something like "HEAD from this ref store". But that is not feasible (or possible with a _lot_ of work). With the current design, we pass a reference around as a string (so called "refname"). Extending this design to pass a string _and_ a ref store is a nightmare, especially when handling extended SHA-1 syntax. So we do it another way. Instead of entering a separate ref space, we make refs from other worktrees available in the current ref space. So "HEAD" is always HEAD of the current worktree, but then we can have "worktrees/blah/HEAD" to denote HEAD from a worktree named "blah". This syntax coincidentally matches the underlying directory structure which makes implementation a bit easier. The main worktree has to be treated specially because well... it's special from the beginning. So HEAD from the main worktree is acccessible via the name "main-worktree/HEAD" instead of "worktrees/main/HEAD" because "main" could be just another secondary worktree. This patch also makes it possible to specify refs from one worktree in another one, e.g. git log worktrees/foo/HEAD Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

Merge branch 'rj/header-check'

2018-10-16T07:16:00Z

Header files clean-up. * rj/header-check: delta-islands.h: add missing forward declarations (hdr-check) midx.h: add missing forward declarations (hdr-check) refs/refs-internal.h: add missing declarations (hdr-check) refs/packed-backend.h: add missing declaration (hdr-check) refs/ref-cache.h: add missing declarations (hdr-check) ewah/ewok_rlw.h: add missing include (hdr-check) json-writer.h: add missing include (hdr-check) Makefile: add a hdr-check target

Merge branch 'tq/refs-internal-comment-fix'

2018-10-16T07:15:59Z

Fix for typo in a sample code in comment. * tq/refs-internal-comment-fix: refs: docstring typo

Merge branch 'ds/commit-graph-with-grafts'

2018-10-16T07:15:59Z

The recently introduced commit-graph auxiliary data is incompatible with mechanisms such as replace & grafts that "breaks" immutable nature of the object reference relationship. Disable optimizations based on its use (and updating existing commit-graph) when these incompatible features are in use in the repository. * ds/commit-graph-with-grafts: commit-graph: close_commit_graph before shallow walk commit-graph: not compatible with uninitialized repo commit-graph: not compatible with grafts commit-graph: not compatible with replace objects test-repository: properly init repo commit-graph: update design document refs.c: upgrade for_each_replace_ref to be a each_repo_ref_fn callback refs.c: migrate internal ref iteration to pass thru repository argument

refs/packed-backend: express constants using the_hash_algo

2018-10-15T03:53:15Z

Switch uses of GIT_SHA1_HEXSZ to use the_hash_algo so that they are appropriate for the any given hash length. Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano

Add a place for (not) sharing stuff between worktrees

2018-10-06T23:21:18Z

When multiple worktrees are used, we need rules to determine if something belongs to one worktree or all of them. Instead of keeping adding rules when new stuff comes (*), have a generic rule: - Inside $GIT_DIR, which is per-worktree by default, add $GIT_DIR/common which is always shared. New features that want to share stuff should put stuff under this directory. - Inside refs/, which is shared by default except refs/bisect, add refs/worktree/ which is per-worktree. We may eventually move refs/bisect to this new location and remove the exception in refs code. (*) And it may also include stuff from external commands which will have no way to modify common/per-worktree rules. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano