git/Documentation/technical, branch v2.18.2

Merge branch 'ab/get-short-oid'

2018-05-30T05:04:11Z

When a short hexadecimal string is used to name an object but there are multiple objects that share the string as the prefix of their names, the code lists these ambiguous candidates in a help message. These object names are now sorted according to their types for easier eyeballing. * ab/get-short-oid: get_short_oid: sort ambiguous objects by type, then SHA-1 sha1-name.c: move around the collect_ambiguous() function git-p4: change "commitish" typo to "committish" sha1-array.h: align function arguments sha1-name.c: remove stray newline

Merge branch 'jt/partial-clone-proto-v2'

2018-05-30T05:04:10Z

Transfer protocol v2 learned to support the partial clone. * jt/partial-clone-proto-v2: {fetch,upload}-pack: support filter in protocol v2 upload-pack: read config when serving protocol v2 upload-pack: fix error message typo

Merge branch 'js/deprecate-grafts'

2018-05-23T05:38:17Z

The functionality of "$GIT_DIR/info/grafts" has been superseded by the "refs/replace/" mechanism for some time now, but the internal code had support for it in many places, which has been cleaned up in order to drop support of the "grafts" mechanism. * js/deprecate-grafts: Remove obsolete script to convert grafts to replace refs technical/shallow: describe why shallow cannot use replace refs technical/shallow: stop referring to grafts filter-branch: stop suggesting to use grafts Deprecate support for .git/info/grafts Add a test for `git replace --convert-graft-file` replace: introduce --convert-graft-file replace: prepare create_graft() for converting graft files wholesale replace: "libify" create_graft() and callees replace: avoid using die() to indicate a bug commit: Let the callback of for_each_mergetag return on error argv_array: offer to split a string by whitespace

Merge branch 'bw/server-options'

2018-05-23T05:38:15Z

The transport protocol v2 is getting updated further. * bw/server-options: fetch: send server options when using protocol v2 ls-remote: send server options when using protocol v2 serve: introduce the server-option capability

Merge branch 'nd/pack-format-doc'

2018-05-23T05:38:11Z

Doc update. * nd/pack-format-doc: pack-format.txt: more details on pack file format

Merge branch 'ao/config-api-doc'

2018-05-23T05:38:10Z

Doc update. * ao/config-api-doc: doc: fix config API documentation about config_with_options

pack-format.txt: more details on pack file format

2018-05-13T01:20:03Z

The current document mentions OBJ_* constants without their actual values. A git developer would know these are from cache.h but that's not very friendly to a person who wants to read this file to implement a pack file parser. Similarly, the deltified representation is not documented at all (the "document" is basically patch-delta.c). Translate that C code to English with a bit more about what ofs-delta and ref-delta mean. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

get_short_oid: sort ambiguous objects by type, then SHA-1

2018-05-11T05:43:23Z

Change the output emitted when an ambiguous object is encountered so that we show tags first, then commits, followed by trees, and finally blobs. Within each type we show objects in hashcmp() order. Before this change the objects were only ordered by hashcmp(). The reason for doing this is that the output looks better as a result, e.g. the v2.17.0 tag before this change on "git show e8f2" would display: hint: The candidates are: hint: e8f2093055 tree hint: e8f21caf94 commit 2013-06-24 - bash prompt: print unique detached HEAD abbreviated object name hint: e8f21d02f7 blob hint: e8f21d577c blob hint: e8f25a3a50 tree hint: e8f26250fa commit 2017-02-03 - Merge pull request #996 from jeffhostetler/jeffhostetler/register_rename_src hint: e8f2650052 tag v2.17.0 hint: e8f2867228 blob hint: e8f28d537c tree hint: e8f2a35526 blob hint: e8f2bc0c06 commit 2015-05-10 - Documentation: note behavior for multiple remote.url entries hint: e8f2cf6ec0 tree Now we'll instead show: hint: e8f2650052 tag v2.17.0 hint: e8f21caf94 commit 2013-06-24 - bash prompt: print unique detached HEAD abbreviated object name hint: e8f26250fa commit 2017-02-03 - Merge pull request #996 from jeffhostetler/jeffhostetler/register_rename_src hint: e8f2bc0c06 commit 2015-05-10 - Documentation: note behavior for multiple remote.url entries hint: e8f2093055 tree hint: e8f25a3a50 tree hint: e8f28d537c tree hint: e8f2cf6ec0 tree hint: e8f21d02f7 blob hint: e8f21d577c blob hint: e8f2867228 blob hint: e8f2a35526 blob Since we show the commit data in the output that's nicely aligned once we sort by object type. The decision to show tags before commits is pretty arbitrary. I don't want to order by object_type since there tags come last after blobs, which doesn't make sense if we want to show the most important things first. I could display them after commits, but it's much less likely that we'll display a tag, so if there is one it makes sense to show it prominently at the top. A note on the implementation: Derrick rightly pointed out[1] that we're bending over backwards here in get_short_oid() to first de-duplicate the list, and then emit it, but could simply do it in one step. The reason for that is that oid_array_for_each_unique() doesn't actually require that the array be sorted by oid_array_sort(), it just needs to be sorted in some order that guarantees that all objects with the same ID are adjacent to one another, which (barring a hash collision, which'll be someone else's problem) the sort_ambiguous() function does. I agree that would be simpler for this code, and had forgotten why I initially wrote it like this[2]. But on further reflection I think it's better to do more work here just so we're not underhandedly using the oid-array API where we lie about the list being sorted. That would break any subsequent use of oid_array_lookup() in subtle ways. I could get around that by hacking the API itself to support this use-case and documenting it, which I did as a WIP patch in [3], but I think it's too much code smell just for this one call site. It's simpler for the API to just introduce a oid_array_for_each() function to eagerly spew out the list without sorting or de-duplication, and then do the de-duplication and sorting in two passes. 1. https://public-inbox.org/git/20180501130318.58251-1-dstolee@microsoft.com/ 2. https://public-inbox.org/git/876047ze9v.fsf@evledraar.gmail.com/ 3. https://public-inbox.org/git/874ljrzctc.fsf@evledraar.gmail.com/ Helped-by: Derrick Stolee Signed-off-by: Ævar Arnfjörð Bjarmason Signed-off-by: Junio C Hamano

doc: fix config API documentation about config_with_options

2018-05-11T01:26:33Z

In commit dc8441fdb ("config: don't implicitly use gitdir or commondir", 2017-06-14) the function git_config_with_options was renamed to config_with_options to better reflect the fact that it does not access the git global config or the repo config by default. However Documentation/technical/api-config.txt still refers to the previous name, fix that. While at it also update the documentation about the extra parameters, because they too changed since the initial definition. Signed-off-by: Antonio Ospite Signed-off-by: Junio C Hamano

Merge branch 'ds/commit-graph'

2018-05-08T06:59:20Z

Precompute and store information necessary for ancestry traversal in a separate file to optimize graph walking. * ds/commit-graph: commit-graph: implement "--append" option commit-graph: build graph from starting commits commit-graph: read only from specific pack-indexes commit: integrate commit graph with commit parsing commit-graph: close under reachability commit-graph: add core.commitGraph setting commit-graph: implement git commit-graph read commit-graph: implement git-commit-graph write commit-graph: implement write_commit_graph() commit-graph: create git-commit-graph builtin graph: add commit graph design document commit-graph: add format document csum-file: refactor finalize_hashfile() method csum-file: rename hashclose() to finalize_hashfile()